dependence analysis
Patch from Preston Briggs <preston.briggs@gmail.com>.
This is an updated version of the dependence-analysis patch, including an MIV
test based on Banerjee's inequalities.
It's a fairly complete implementation of the paper
Practical Dependence Testing
Gina Goff, Ken Kennedy, and Chau-Wen Tseng
PLDI 1991
It cannot yet propagate constraints between coupled RDIV subscripts (discussed
in Section 5.3.2 of the paper).
It's organized as a FunctionPass with a single entry point that supports testing
for dependence between two instructions in a function. If there's no dependence,
it returns null. If there's a dependence, it returns a pointer to a Dependence
which can be queried about details (what kind of dependence, is it loop
independent, direction and distance vector entries, etc). I haven't included
every imaginable feature, but there's a good selection that should be adequate
for supporting many loop transformations. Of course, it can be extended as
necessary.
Included in the patch file are many test cases, commented with C code showing
the loops and array references.
llvm-svn: 165708
diff --git a/llvm/test/Analysis/DependenceAnalysis/Banerjee.ll b/llvm/test/Analysis/DependenceAnalysis/Banerjee.ll
new file mode 100644
index 0000000..8865ee9
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/Banerjee.ll
@@ -0,0 +1,595 @@
+; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
+
+; ModuleID = 'Banerjee.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; for (long int i = 1; i <= 10; i++)
+;; for (long int j = 1; j <= 10; j++) {
+;; A[10*i + j] = ...
+;; ... = A[10*i + j - 1];
+
+define void @banerjee0(i64* %A, i64* %B, i64 %m, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc7
+ %B.addr.04 = phi i64* [ %B, %entry ], [ %scevgep, %for.inc7 ]
+ %i.03 = phi i64 [ 1, %entry ], [ %inc8, %for.inc7 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 1, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i64* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %mul = mul nsw i64 %i.03, 10
+ %add = add nsw i64 %mul, %j.02
+ %arrayidx = getelementptr inbounds i64* %A, i64 %add
+ store i64 0, i64* %arrayidx, align 8
+ %mul4 = mul nsw i64 %i.03, 10
+ %add5 = add nsw i64 %mul4, %j.02
+ %sub = add nsw i64 %add5, -1
+ %arrayidx6 = getelementptr inbounds i64* %A, i64 %sub
+ %0 = load i64* %arrayidx6, align 8
+; CHECK: da analyze - flow [<= <>]!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.11, i64 1
+ store i64 %0, i64* %B.addr.11, align 8
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 11
+ br i1 %exitcond, label %for.body3, label %for.inc7
+
+for.inc7: ; preds = %for.body3
+ %scevgep = getelementptr i64* %B.addr.04, i64 10
+ %inc8 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc8, 11
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end9
+
+for.end9: ; preds = %for.inc7
+ ret void
+}
+
+
+;; for (long int i = 1; i <= n; i++)
+;; for (long int j = 1; j <= m; j++) {
+;; A[10*i + j] = ...
+;; ... = A[10*i + j - 1];
+
+define void @banerjee1(i64* %A, i64* %B, i64 %m, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp4 = icmp sgt i64 %n, 0
+ br i1 %cmp4, label %for.cond1.preheader.preheader, label %for.end9
+
+for.cond1.preheader.preheader: ; preds = %entry
+ %0 = add i64 %n, 1
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.cond1.preheader.preheader, %for.inc7
+ %B.addr.06 = phi i64* [ %B.addr.1.lcssa, %for.inc7 ], [ %B, %for.cond1.preheader.preheader ]
+ %i.05 = phi i64 [ %inc8, %for.inc7 ], [ 1, %for.cond1.preheader.preheader ]
+ %1 = add i64 %m, 1
+ %cmp21 = icmp sgt i64 %m, 0
+ br i1 %cmp21, label %for.body3.preheader, label %for.inc7
+
+for.body3.preheader: ; preds = %for.cond1.preheader
+ br label %for.body3
+
+for.body3: ; preds = %for.body3.preheader, %for.body3
+ %j.03 = phi i64 [ %inc, %for.body3 ], [ 1, %for.body3.preheader ]
+ %B.addr.12 = phi i64* [ %incdec.ptr, %for.body3 ], [ %B.addr.06, %for.body3.preheader ]
+ %mul = mul nsw i64 %i.05, 10
+ %add = add nsw i64 %mul, %j.03
+ %arrayidx = getelementptr inbounds i64* %A, i64 %add
+ store i64 0, i64* %arrayidx, align 8
+ %mul4 = mul nsw i64 %i.05, 10
+ %add5 = add nsw i64 %mul4, %j.03
+ %sub = add nsw i64 %add5, -1
+ %arrayidx6 = getelementptr inbounds i64* %A, i64 %sub
+ %2 = load i64* %arrayidx6, align 8
+; CHECK: da analyze - flow [* <>]!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.12, i64 1
+ store i64 %2, i64* %B.addr.12, align 8
+ %inc = add nsw i64 %j.03, 1
+ %exitcond = icmp eq i64 %inc, %1
+ br i1 %exitcond, label %for.inc7.loopexit, label %for.body3
+
+for.inc7.loopexit: ; preds = %for.body3
+ %scevgep = getelementptr i64* %B.addr.06, i64 %m
+ br label %for.inc7
+
+for.inc7: ; preds = %for.inc7.loopexit, %for.cond1.preheader
+ %B.addr.1.lcssa = phi i64* [ %B.addr.06, %for.cond1.preheader ], [ %scevgep, %for.inc7.loopexit ]
+ %inc8 = add nsw i64 %i.05, 1
+ %exitcond7 = icmp eq i64 %inc8, %0
+ br i1 %exitcond7, label %for.end9.loopexit, label %for.cond1.preheader
+
+for.end9.loopexit: ; preds = %for.inc7
+ br label %for.end9
+
+for.end9: ; preds = %for.end9.loopexit, %entry
+ ret void
+}
+
+
+;; for (long int i = 0; i < 10; i++)
+;; for (long int j = 0; j < 10; j++) {
+;; A[10*i + j] = 0;
+;; *B++ = A[10*i + j + 100];
+
+define void @banerjee2(i64* %A, i64* %B, i64 %m, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc8
+ %B.addr.04 = phi i64* [ %B, %entry ], [ %scevgep, %for.inc8 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc9, %for.inc8 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i64* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %mul = mul nsw i64 %i.03, 10
+ %add = add nsw i64 %mul, %j.02
+ %arrayidx = getelementptr inbounds i64* %A, i64 %add
+ store i64 0, i64* %arrayidx, align 8
+ %mul4 = mul nsw i64 %i.03, 10
+ %add5 = add nsw i64 %mul4, %j.02
+ %add6 = add nsw i64 %add5, 100
+ %arrayidx7 = getelementptr inbounds i64* %A, i64 %add6
+ %0 = load i64* %arrayidx7, align 8
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.11, i64 1
+ store i64 %0, i64* %B.addr.11, align 8
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 10
+ br i1 %exitcond, label %for.body3, label %for.inc8
+
+for.inc8: ; preds = %for.body3
+ %scevgep = getelementptr i64* %B.addr.04, i64 10
+ %inc9 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc9, 10
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end10
+
+for.end10: ; preds = %for.inc8
+ ret void
+}
+
+
+;; for (long int i = 0; i < 10; i++)
+;; for (long int j = 0; j < 10; j++) {
+;; A[10*i + j] = ...
+;; ... = A[10*i + j + 99];
+
+define void @banerjee3(i64* %A, i64* %B, i64 %m, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc8
+ %B.addr.04 = phi i64* [ %B, %entry ], [ %scevgep, %for.inc8 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc9, %for.inc8 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i64* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %mul = mul nsw i64 %i.03, 10
+ %add = add nsw i64 %mul, %j.02
+ %arrayidx = getelementptr inbounds i64* %A, i64 %add
+ store i64 0, i64* %arrayidx, align 8
+ %mul4 = mul nsw i64 %i.03, 10
+ %add5 = add nsw i64 %mul4, %j.02
+ %add6 = add nsw i64 %add5, 99
+ %arrayidx7 = getelementptr inbounds i64* %A, i64 %add6
+ %0 = load i64* %arrayidx7, align 8
+; CHECK: da analyze - flow [> >]!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.11, i64 1
+ store i64 %0, i64* %B.addr.11, align 8
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 10
+ br i1 %exitcond, label %for.body3, label %for.inc8
+
+for.inc8: ; preds = %for.body3
+ %scevgep = getelementptr i64* %B.addr.04, i64 10
+ %inc9 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc9, 10
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end10
+
+for.end10: ; preds = %for.inc8
+ ret void
+}
+
+
+;; for (long int i = 0; i < 10; i++)
+;; for (long int j = 0; j < 10; j++) {
+;; A[10*i + j] = ...
+;; ... = A[10*i + j - 100];
+
+define void @banerjee4(i64* %A, i64* %B, i64 %m, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc7
+ %B.addr.04 = phi i64* [ %B, %entry ], [ %scevgep, %for.inc7 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc8, %for.inc7 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i64* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %mul = mul nsw i64 %i.03, 10
+ %add = add nsw i64 %mul, %j.02
+ %arrayidx = getelementptr inbounds i64* %A, i64 %add
+ store i64 0, i64* %arrayidx, align 8
+ %mul4 = mul nsw i64 %i.03, 10
+ %add5 = add nsw i64 %mul4, %j.02
+ %sub = add nsw i64 %add5, -100
+ %arrayidx6 = getelementptr inbounds i64* %A, i64 %sub
+ %0 = load i64* %arrayidx6, align 8
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.11, i64 1
+ store i64 %0, i64* %B.addr.11, align 8
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 10
+ br i1 %exitcond, label %for.body3, label %for.inc7
+
+for.inc7: ; preds = %for.body3
+ %scevgep = getelementptr i64* %B.addr.04, i64 10
+ %inc8 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc8, 10
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end9
+
+for.end9: ; preds = %for.inc7
+ ret void
+}
+
+
+;; for (long int i = 0; i < 10; i++)
+;; for (long int j = 0; j < 10; j++) {
+;; A[10*i + j] = ...
+;; ... = A[10*i + j - 99];
+
+define void @banerjee5(i64* %A, i64* %B, i64 %m, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc7
+ %B.addr.04 = phi i64* [ %B, %entry ], [ %scevgep, %for.inc7 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc8, %for.inc7 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i64* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %mul = mul nsw i64 %i.03, 10
+ %add = add nsw i64 %mul, %j.02
+ %arrayidx = getelementptr inbounds i64* %A, i64 %add
+ store i64 0, i64* %arrayidx, align 8
+ %mul4 = mul nsw i64 %i.03, 10
+ %add5 = add nsw i64 %mul4, %j.02
+ %sub = add nsw i64 %add5, -99
+ %arrayidx6 = getelementptr inbounds i64* %A, i64 %sub
+ %0 = load i64* %arrayidx6, align 8
+; CHECK: da analyze - flow [< <]!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.11, i64 1
+ store i64 %0, i64* %B.addr.11, align 8
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 10
+ br i1 %exitcond, label %for.body3, label %for.inc7
+
+for.inc7: ; preds = %for.body3
+ %scevgep = getelementptr i64* %B.addr.04, i64 10
+ %inc8 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc8, 10
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end9
+
+for.end9: ; preds = %for.inc7
+ ret void
+}
+
+
+;; for (long int i = 0; i < 10; i++)
+;; for (long int j = 0; j < 10; j++) {
+;; A[10*i + j] = ...
+;; ... = A[10*i + j + 9];
+
+define void @banerjee6(i64* %A, i64* %B, i64 %m, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc8
+ %B.addr.04 = phi i64* [ %B, %entry ], [ %scevgep, %for.inc8 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc9, %for.inc8 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i64* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %mul = mul nsw i64 %i.03, 10
+ %add = add nsw i64 %mul, %j.02
+ %arrayidx = getelementptr inbounds i64* %A, i64 %add
+ store i64 0, i64* %arrayidx, align 8
+ %mul4 = mul nsw i64 %i.03, 10
+ %add5 = add nsw i64 %mul4, %j.02
+ %add6 = add nsw i64 %add5, 9
+ %arrayidx7 = getelementptr inbounds i64* %A, i64 %add6
+ %0 = load i64* %arrayidx7, align 8
+; CHECK: da analyze - flow [=> <>]!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.11, i64 1
+ store i64 %0, i64* %B.addr.11, align 8
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 10
+ br i1 %exitcond, label %for.body3, label %for.inc8
+
+for.inc8: ; preds = %for.body3
+ %scevgep = getelementptr i64* %B.addr.04, i64 10
+ %inc9 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc9, 10
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end10
+
+for.end10: ; preds = %for.inc8
+ ret void
+}
+
+
+;; for (long int i = 0; i < 10; i++)
+;; for (long int j = 0; j < 10; j++) {
+;; A[10*i + j] = ...
+;; ... = A[10*i + j + 10];
+
+define void @banerjee7(i64* %A, i64* %B, i64 %m, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc8
+ %B.addr.04 = phi i64* [ %B, %entry ], [ %scevgep, %for.inc8 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc9, %for.inc8 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i64* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %mul = mul nsw i64 %i.03, 10
+ %add = add nsw i64 %mul, %j.02
+ %arrayidx = getelementptr inbounds i64* %A, i64 %add
+ store i64 0, i64* %arrayidx, align 8
+ %mul4 = mul nsw i64 %i.03, 10
+ %add5 = add nsw i64 %mul4, %j.02
+ %add6 = add nsw i64 %add5, 10
+ %arrayidx7 = getelementptr inbounds i64* %A, i64 %add6
+ %0 = load i64* %arrayidx7, align 8
+; CHECK: da analyze - flow [> <=]!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.11, i64 1
+ store i64 %0, i64* %B.addr.11, align 8
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 10
+ br i1 %exitcond, label %for.body3, label %for.inc8
+
+for.inc8: ; preds = %for.body3
+ %scevgep = getelementptr i64* %B.addr.04, i64 10
+ %inc9 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc9, 10
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end10
+
+for.end10: ; preds = %for.inc8
+ ret void
+}
+
+
+;; for (long int i = 0; i < 10; i++)
+;; for (long int j = 0; j < 10; j++) {
+;; A[10*i + j] = ...
+;; ... = A[10*i + j + 11];
+
+define void @banerjee8(i64* %A, i64* %B, i64 %m, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc8
+ %B.addr.04 = phi i64* [ %B, %entry ], [ %scevgep, %for.inc8 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc9, %for.inc8 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i64* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %mul = mul nsw i64 %i.03, 10
+ %add = add nsw i64 %mul, %j.02
+ %arrayidx = getelementptr inbounds i64* %A, i64 %add
+ store i64 0, i64* %arrayidx, align 8
+ %mul4 = mul nsw i64 %i.03, 10
+ %add5 = add nsw i64 %mul4, %j.02
+ %add6 = add nsw i64 %add5, 11
+ %arrayidx7 = getelementptr inbounds i64* %A, i64 %add6
+ %0 = load i64* %arrayidx7, align 8
+; CHECK: da analyze - flow [> <>]!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.11, i64 1
+ store i64 %0, i64* %B.addr.11, align 8
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 10
+ br i1 %exitcond, label %for.body3, label %for.inc8
+
+for.inc8: ; preds = %for.body3
+ %scevgep = getelementptr i64* %B.addr.04, i64 10
+ %inc9 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc9, 10
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end10
+
+for.end10: ; preds = %for.inc8
+ ret void
+}
+
+
+;; for (long int i = 0; i < 20; i++)
+;; for (long int j = 0; j < 20; j++) {
+;; A[30*i + 500*j] = ...
+;; ... = A[i - 500*j + 11];
+
+define void @banerjee9(i64* %A, i64* %B, i64 %m, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc8
+ %B.addr.04 = phi i64* [ %B, %entry ], [ %scevgep, %for.inc8 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc9, %for.inc8 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i64* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %mul = mul nsw i64 %i.03, 30
+ %mul4 = mul nsw i64 %j.02, 500
+ %add = add nsw i64 %mul, %mul4
+ %arrayidx = getelementptr inbounds i64* %A, i64 %add
+ store i64 0, i64* %arrayidx, align 8
+ %0 = mul i64 %j.02, -500
+ %sub = add i64 %i.03, %0
+ %add6 = add nsw i64 %sub, 11
+ %arrayidx7 = getelementptr inbounds i64* %A, i64 %add6
+ %1 = load i64* %arrayidx7, align 8
+; CHECK: da analyze - flow [<= =|<]!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.11, i64 1
+ store i64 %1, i64* %B.addr.11, align 8
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 20
+ br i1 %exitcond, label %for.body3, label %for.inc8
+
+for.inc8: ; preds = %for.body3
+ %scevgep = getelementptr i64* %B.addr.04, i64 20
+ %inc9 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc9, 20
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end10
+
+for.end10: ; preds = %for.inc8
+ ret void
+}
+
+
+;; for (long int i = 0; i < 20; i++)
+;; for (long int j = 0; j < 20; j++) {
+;; A[i + 500*j] = ...
+;; ... = A[i - 500*j + 11];
+
+define void @banerjee10(i64* %A, i64* %B, i64 %m, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc7
+ %B.addr.04 = phi i64* [ %B, %entry ], [ %scevgep, %for.inc7 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc8, %for.inc7 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i64* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %mul = mul nsw i64 %j.02, 500
+ %add = add nsw i64 %i.03, %mul
+ %arrayidx = getelementptr inbounds i64* %A, i64 %add
+ store i64 0, i64* %arrayidx, align 8
+ %0 = mul i64 %j.02, -500
+ %sub = add i64 %i.03, %0
+ %add5 = add nsw i64 %sub, 11
+ %arrayidx6 = getelementptr inbounds i64* %A, i64 %add5
+ %1 = load i64* %arrayidx6, align 8
+; CHECK: da analyze - flow [<> =]!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.11, i64 1
+ store i64 %1, i64* %B.addr.11, align 8
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 20
+ br i1 %exitcond, label %for.body3, label %for.inc7
+
+for.inc7: ; preds = %for.body3
+ %scevgep = getelementptr i64* %B.addr.04, i64 20
+ %inc8 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc8, 20
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end9
+
+for.end9: ; preds = %for.inc7
+ ret void
+}
+
+
+;; for (long int i = 0; i < 20; i++)
+;; for (long int j = 0; j < 20; j++) {
+;; A[300*i + j] = ...
+;; ... = A[250*i - j + 11];
+
+define void @banerjee11(i64* %A, i64* %B, i64 %m, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc7
+ %B.addr.04 = phi i64* [ %B, %entry ], [ %scevgep, %for.inc7 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc8, %for.inc7 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i64* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %mul = mul nsw i64 %i.03, 300
+ %add = add nsw i64 %mul, %j.02
+ %arrayidx = getelementptr inbounds i64* %A, i64 %add
+ store i64 0, i64* %arrayidx, align 8
+ %mul4 = mul nsw i64 %i.03, 250
+ %sub = sub nsw i64 %mul4, %j.02
+ %add5 = add nsw i64 %sub, 11
+ %arrayidx6 = getelementptr inbounds i64* %A, i64 %add5
+ %0 = load i64* %arrayidx6, align 8
+; CHECK: da analyze - flow [<= <>]!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.11, i64 1
+ store i64 %0, i64* %B.addr.11, align 8
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 20
+ br i1 %exitcond, label %for.body3, label %for.inc7
+
+for.inc7: ; preds = %for.body3
+ %scevgep = getelementptr i64* %B.addr.04, i64 20
+ %inc8 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc8, 20
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end9
+
+for.end9: ; preds = %for.inc7
+ ret void
+}
+
+
+;; for (long int i = 0; i < 20; i++)
+;; for (long int j = 0; j < 20; j++) {
+;; A[100*i + j] = ...
+;; ... = A[100*i - j + 11];
+
+define void @banerjee12(i64* %A, i64* %B, i64 %m, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc7
+ %B.addr.04 = phi i64* [ %B, %entry ], [ %scevgep, %for.inc7 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc8, %for.inc7 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i64* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %mul = mul nsw i64 %i.03, 100
+ %add = add nsw i64 %mul, %j.02
+ %arrayidx = getelementptr inbounds i64* %A, i64 %add
+ store i64 0, i64* %arrayidx, align 8
+ %mul4 = mul nsw i64 %i.03, 100
+ %sub = sub nsw i64 %mul4, %j.02
+ %add5 = add nsw i64 %sub, 11
+ %arrayidx6 = getelementptr inbounds i64* %A, i64 %add5
+ %0 = load i64* %arrayidx6, align 8
+; CHECK: da analyze - flow [= <>]!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.11, i64 1
+ store i64 %0, i64* %B.addr.11, align 8
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 20
+ br i1 %exitcond, label %for.body3, label %for.inc7
+
+for.inc7: ; preds = %for.body3
+ %scevgep = getelementptr i64* %B.addr.04, i64 20
+ %inc8 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc8, 20
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end9
+
+for.end9: ; preds = %for.inc7
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/Coupled.ll b/llvm/test/Analysis/DependenceAnalysis/Coupled.ll
new file mode 100644
index 0000000..60163fe
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/Coupled.ll
@@ -0,0 +1,509 @@
+; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
+
+; ModuleID = 'Coupled.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; for (long int i = 0; i < 50; i++)
+;; A[i][i] = ...
+;; ... = A[i + 10][i + 9]
+
+define void @couple0([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %arrayidx1 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %i.02
+ store i32 %conv, i32* %arrayidx1, align 4
+ %add = add nsw i64 %i.02, 9
+ %add2 = add nsw i64 %i.02, 10
+ %arrayidx4 = getelementptr inbounds [100 x i32]* %A, i64 %add2, i64 %add
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 50
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i < 50; i++)
+;; A[i][i] = ...
+;; ... = A[i + 9][i + 9]
+
+define void @couple1([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %arrayidx1 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %i.02
+ store i32 %conv, i32* %arrayidx1, align 4
+ %add = add nsw i64 %i.02, 9
+ %add2 = add nsw i64 %i.02, 9
+ %arrayidx4 = getelementptr inbounds [100 x i32]* %A, i64 %add2, i64 %add
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - consistent flow [-9]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 50
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i < 50; i++)
+;; A[3*i - 6][3*i - 6] = ...
+;; ... = A[i][i]
+
+define void @couple2([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul nsw i64 %i.02, 3
+ %sub = add nsw i64 %mul, -6
+ %mul1 = mul nsw i64 %i.02, 3
+ %sub2 = add nsw i64 %mul1, -6
+ %arrayidx3 = getelementptr inbounds [100 x i32]* %A, i64 %sub2, i64 %sub
+ store i32 %conv, i32* %arrayidx3, align 4
+ %arrayidx5 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %i.02
+ %0 = load i32* %arrayidx5, align 4
+; CHECK: da analyze - flow [*|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 50
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i < 50; i++)
+;; A[3*i - 6][3*i - 5] = ...
+;; ... = A[i][i]
+
+define void @couple3([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul nsw i64 %i.02, 3
+ %sub = add nsw i64 %mul, -5
+ %mul1 = mul nsw i64 %i.02, 3
+ %sub2 = add nsw i64 %mul1, -6
+ %arrayidx3 = getelementptr inbounds [100 x i32]* %A, i64 %sub2, i64 %sub
+ store i32 %conv, i32* %arrayidx3, align 4
+ %arrayidx5 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %i.02
+ %0 = load i32* %arrayidx5, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 50
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i < 50; i++)
+;; A[3*i - 6][3*i - n] = ...
+;; ... = A[i][i]
+
+define void @couple4([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul nsw i64 %i.02, 3
+ %conv1 = sext i32 %n to i64
+ %sub = sub nsw i64 %mul, %conv1
+ %mul2 = mul nsw i64 %i.02, 3
+ %sub3 = add nsw i64 %mul2, -6
+ %arrayidx4 = getelementptr inbounds [100 x i32]* %A, i64 %sub3, i64 %sub
+ store i32 %conv, i32* %arrayidx4, align 4
+ %arrayidx6 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %i.02
+ %0 = load i32* %arrayidx6, align 4
+; CHECK: da analyze - flow [*|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 50
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i < 50; i++)
+;; A[3*i - n + 1][3*i - n] = ...
+;; ... = A[i][i]
+
+define void @couple5([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul nsw i64 %i.02, 3
+ %conv1 = sext i32 %n to i64
+ %sub = sub nsw i64 %mul, %conv1
+ %mul2 = mul nsw i64 %i.02, 3
+ %conv3 = sext i32 %n to i64
+ %sub4 = sub nsw i64 %mul2, %conv3
+ %add = add nsw i64 %sub4, 1
+ %arrayidx5 = getelementptr inbounds [100 x i32]* %A, i64 %add, i64 %sub
+ store i32 %conv, i32* %arrayidx5, align 4
+ %arrayidx7 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %i.02
+ %0 = load i32* %arrayidx7, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 50
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i < 50; i++)
+;; A[i][3*i - 6] = ...
+;; ... = A[i][i]
+
+define void @couple6([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul nsw i64 %i.02, 3
+ %sub = add nsw i64 %mul, -6
+ %arrayidx1 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %sub
+ store i32 %conv, i32* %arrayidx1, align 4
+ %arrayidx3 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %i.02
+ %0 = load i32* %arrayidx3, align 4
+; CHECK: da analyze - flow [=|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 50
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i < 50; i++)
+;; A[i][3*i - 5] = ...
+;; ... = A[i][i]
+
+define void @couple7([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul nsw i64 %i.02, 3
+ %sub = add nsw i64 %mul, -5
+ %arrayidx1 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %sub
+ store i32 %conv, i32* %arrayidx1, align 4
+ %arrayidx3 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %i.02
+ %0 = load i32* %arrayidx3, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 50
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i <= 15; i++)
+;; A[3*i - 18][3 - i] = ...
+;; ... = A[i][i]
+
+define void @couple8([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %sub = sub nsw i64 3, %i.02
+ %mul = mul nsw i64 %i.02, 3
+ %sub1 = add nsw i64 %mul, -18
+ %arrayidx2 = getelementptr inbounds [100 x i32]* %A, i64 %sub1, i64 %sub
+ store i32 %conv, i32* %arrayidx2, align 4
+ %arrayidx4 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %i.02
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 16
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i <= 15; i++)
+;; A[3*i - 18][2 - i] = ...
+;; ... = A[i][i]
+
+define void @couple9([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %sub = sub nsw i64 2, %i.02
+ %mul = mul nsw i64 %i.02, 3
+ %sub1 = add nsw i64 %mul, -18
+ %arrayidx2 = getelementptr inbounds [100 x i32]* %A, i64 %sub1, i64 %sub
+ store i32 %conv, i32* %arrayidx2, align 4
+ %arrayidx4 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %i.02
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 16
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i <= 15; i++)
+;; A[3*i - 18][6 - i] = ...
+;; ... = A[i][i]
+
+define void @couple10([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %sub = sub nsw i64 6, %i.02
+ %mul = mul nsw i64 %i.02, 3
+ %sub1 = add nsw i64 %mul, -18
+ %arrayidx2 = getelementptr inbounds [100 x i32]* %A, i64 %sub1, i64 %sub
+ store i32 %conv, i32* %arrayidx2, align 4
+ %arrayidx4 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %i.02
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - flow [>] splitable!
+; CHECK: da analyze - split level = 1, iteration = 3!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 16
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i <= 15; i++)
+;; A[3*i - 18][18 - i] = ...
+;; ... = A[i][i]
+
+define void @couple11([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %sub = sub nsw i64 18, %i.02
+ %mul = mul nsw i64 %i.02, 3
+ %sub1 = add nsw i64 %mul, -18
+ %arrayidx2 = getelementptr inbounds [100 x i32]* %A, i64 %sub1, i64 %sub
+ store i32 %conv, i32* %arrayidx2, align 4
+ %arrayidx4 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %i.02
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - flow [=|<] splitable!
+; CHECK: da analyze - split level = 1, iteration = 9!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 16
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i <= 12; i++)
+;; A[3*i - 18][22 - i] = ...
+;; ... = A[i][i]
+
+define void @couple12([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %sub = sub nsw i64 22, %i.02
+ %mul = mul nsw i64 %i.02, 3
+ %sub1 = add nsw i64 %mul, -18
+ %arrayidx2 = getelementptr inbounds [100 x i32]* %A, i64 %sub1, i64 %sub
+ store i32 %conv, i32* %arrayidx2, align 4
+ %arrayidx4 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %i.02
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - flow [<] splitable!
+; CHECK: da analyze - split level = 1, iteration = 11!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 13
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i < 12; i++)
+;; A[3*i - 18][22 - i] = ...
+;; ... = A[i][i]
+
+define void @couple13([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %sub = sub nsw i64 22, %i.02
+ %mul = mul nsw i64 %i.02, 3
+ %sub1 = add nsw i64 %mul, -18
+ %arrayidx2 = getelementptr inbounds [100 x i32]* %A, i64 %sub1, i64 %sub
+ store i32 %conv, i32* %arrayidx2, align 4
+ %arrayidx4 = getelementptr inbounds [100 x i32]* %A, i64 %i.02, i64 %i.02
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 12
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i < 100; i++)
+;; A[3*i - 18][18 - i][i] = ...
+;; ... = A[i][i][i]
+
+define void @couple14([100 x [100 x i32]]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %sub = sub nsw i64 18, %i.02
+ %mul = mul nsw i64 %i.02, 3
+ %sub1 = add nsw i64 %mul, -18
+ %arrayidx3 = getelementptr inbounds [100 x [100 x i32]]* %A, i64 %sub1, i64 %sub, i64 %i.02
+ store i32 %conv, i32* %arrayidx3, align 4
+ %arrayidx6 = getelementptr inbounds [100 x [100 x i32]]* %A, i64 %i.02, i64 %i.02, i64 %i.02
+ %0 = load i32* %arrayidx6, align 4
+; CHECK: da analyze - flow [=|<] splitable!
+; CHECK: da analyze - split level = 1, iteration = 9!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 100
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long int i = 0; i < 100; i++)
+;; A[3*i - 18][22 - i][i] = ...
+;; ... = A[i][i][i]
+
+define void @couple15([100 x [100 x i32]]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %sub = sub nsw i64 22, %i.02
+ %mul = mul nsw i64 %i.02, 3
+ %sub1 = add nsw i64 %mul, -18
+ %arrayidx3 = getelementptr inbounds [100 x [100 x i32]]* %A, i64 %sub1, i64 %sub, i64 %i.02
+ store i32 %conv, i32* %arrayidx3, align 4
+ %arrayidx6 = getelementptr inbounds [100 x [100 x i32]]* %A, i64 %i.02, i64 %i.02, i64 %i.02
+ %0 = load i32* %arrayidx6, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add nsw i64 %i.02, 1
+ %cmp = icmp slt i64 %inc, 100
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/ExactRDIV.ll b/llvm/test/Analysis/DependenceAnalysis/ExactRDIV.ll
new file mode 100644
index 0000000..aa5d254
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/ExactRDIV.ll
@@ -0,0 +1,508 @@
+; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
+
+; ModuleID = 'ExactRDIV.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; for (long int i = 0; i < 10; i++)
+;; A[4*i + 10] = ...
+;; for (long int j = 0; j < 10; j++)
+;; ... = A[2*j + 1];
+
+define void @rdiv0(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl nsw i64 %i.03, 2
+ %add = add nsw i64 %mul, 10
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc, 10
+ br i1 %cmp, label %for.body, label %for.body4
+
+for.body4: ; preds = %for.body4, %for.body
+ %j.02 = phi i64 [ %inc9, %for.body4 ], [ 0, %for.body ]
+ %B.addr.01 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.body ]
+ %mul5 = shl nsw i64 %j.02, 1
+ %add64 = or i64 %mul5, 1
+ %arrayidx7 = getelementptr inbounds i32* %A, i64 %add64
+ %0 = load i32* %arrayidx7, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc9 = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc9, 10
+ br i1 %cmp2, label %for.body4, label %for.end10
+
+for.end10: ; preds = %for.body4
+ ret void
+}
+
+
+;; for (long int i = 0; i < 5; i++)
+;; A[11*i - 45] = ...
+;; for (long int j = 0; j < 10; j++)
+;; ... = A[j];
+
+define void @rdiv1(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, 11
+ %sub = add nsw i64 %mul, -45
+ %arrayidx = getelementptr inbounds i32* %A, i64 %sub
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc, 5
+ br i1 %cmp, label %for.body, label %for.body4
+
+for.body4: ; preds = %for.body4, %for.body
+ %j.02 = phi i64 [ %inc7, %for.body4 ], [ 0, %for.body ]
+ %B.addr.01 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.body ]
+ %arrayidx5 = getelementptr inbounds i32* %A, i64 %j.02
+ %0 = load i32* %arrayidx5, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc7 = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc7, 10
+ br i1 %cmp2, label %for.body4, label %for.end8
+
+for.end8: ; preds = %for.body4
+ ret void
+}
+
+
+;; for (long int i = 0; i <= 5; i++)
+;; A[11*i - 45] = ...
+;; for (long int j = 0; j < 10; j++)
+;; ... = A[j];
+
+define void @rdiv2(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, 11
+ %sub = add nsw i64 %mul, -45
+ %arrayidx = getelementptr inbounds i32* %A, i64 %sub
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc, 6
+ br i1 %cmp, label %for.body, label %for.body4
+
+for.body4: ; preds = %for.body4, %for.body
+ %j.02 = phi i64 [ %inc7, %for.body4 ], [ 0, %for.body ]
+ %B.addr.01 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.body ]
+ %arrayidx5 = getelementptr inbounds i32* %A, i64 %j.02
+ %0 = load i32* %arrayidx5, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc7 = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc7, 10
+ br i1 %cmp2, label %for.body4, label %for.end8
+
+for.end8: ; preds = %for.body4
+ ret void
+}
+
+
+;; for (long int i = 0; i < 5; i++)
+;; A[11*i - 45] = ...
+;; for (long int j = 0; j <= 10; j++)
+;; ... = A[j];
+
+define void @rdiv3(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, 11
+ %sub = add nsw i64 %mul, -45
+ %arrayidx = getelementptr inbounds i32* %A, i64 %sub
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc, 5
+ br i1 %cmp, label %for.body, label %for.body4
+
+for.body4: ; preds = %for.body4, %for.body
+ %j.02 = phi i64 [ %inc7, %for.body4 ], [ 0, %for.body ]
+ %B.addr.01 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.body ]
+ %arrayidx5 = getelementptr inbounds i32* %A, i64 %j.02
+ %0 = load i32* %arrayidx5, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc7 = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc7, 11
+ br i1 %cmp2, label %for.body4, label %for.end8
+
+for.end8: ; preds = %for.body4
+ ret void
+}
+
+
+;; for (long int i = 0; i <= 5; i++)
+;; A[11*i - 45] = ...
+;; for (long int j = 0; j <= 10; j++)
+;; ... = A[j];
+
+define void @rdiv4(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, 11
+ %sub = add nsw i64 %mul, -45
+ %arrayidx = getelementptr inbounds i32* %A, i64 %sub
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc, 6
+ br i1 %cmp, label %for.body, label %for.body4
+
+for.body4: ; preds = %for.body4, %for.body
+ %j.02 = phi i64 [ %inc7, %for.body4 ], [ 0, %for.body ]
+ %B.addr.01 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.body ]
+ %arrayidx5 = getelementptr inbounds i32* %A, i64 %j.02
+ %0 = load i32* %arrayidx5, align 4
+; CHECK: da analyze - flow!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc7 = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc7, 11
+ br i1 %cmp2, label %for.body4, label %for.end8
+
+for.end8: ; preds = %for.body4
+ ret void
+}
+
+
+;; for (long int i = 0; i < 5; i++)
+;; A[-11*i + 45] = ...
+;; for (long int j = 0; j < 10; j++)
+;; ... = A[-j];
+
+define void @rdiv5(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, -11
+ %add = add nsw i64 %mul, 45
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc, 5
+ br i1 %cmp, label %for.body, label %for.body4
+
+for.body4: ; preds = %for.body4, %for.body
+ %j.02 = phi i64 [ %inc7, %for.body4 ], [ 0, %for.body ]
+ %B.addr.01 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.body ]
+ %sub = sub nsw i64 0, %j.02
+ %arrayidx5 = getelementptr inbounds i32* %A, i64 %sub
+ %0 = load i32* %arrayidx5, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc7 = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc7, 10
+ br i1 %cmp2, label %for.body4, label %for.end8
+
+for.end8: ; preds = %for.body4
+ ret void
+}
+
+
+;; for (long int i = 0; i <= 5; i++)
+;; A[-11*i + 45] = ...
+;; for (long int j = 0; j < 10; j++)
+;; ... = A[-j];
+
+define void @rdiv6(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, -11
+ %add = add nsw i64 %mul, 45
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc, 6
+ br i1 %cmp, label %for.body, label %for.body4
+
+for.body4: ; preds = %for.body4, %for.body
+ %j.02 = phi i64 [ %inc7, %for.body4 ], [ 0, %for.body ]
+ %B.addr.01 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.body ]
+ %sub = sub nsw i64 0, %j.02
+ %arrayidx5 = getelementptr inbounds i32* %A, i64 %sub
+ %0 = load i32* %arrayidx5, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc7 = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc7, 10
+ br i1 %cmp2, label %for.body4, label %for.end8
+
+for.end8: ; preds = %for.body4
+ ret void
+}
+
+
+;; for (long int i = 0; i < 5; i++)
+;; A[-11*i + 45] = ...
+;; for (long int j = 0; j <= 10; j++)
+;; ... = A[-j];
+
+define void @rdiv7(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, -11
+ %add = add nsw i64 %mul, 45
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc, 5
+ br i1 %cmp, label %for.body, label %for.body4
+
+for.body4: ; preds = %for.body4, %for.body
+ %j.02 = phi i64 [ %inc7, %for.body4 ], [ 0, %for.body ]
+ %B.addr.01 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.body ]
+ %sub = sub nsw i64 0, %j.02
+ %arrayidx5 = getelementptr inbounds i32* %A, i64 %sub
+ %0 = load i32* %arrayidx5, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc7 = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc7, 11
+ br i1 %cmp2, label %for.body4, label %for.end8
+
+for.end8: ; preds = %for.body4
+ ret void
+}
+
+
+;; for (long int i = 0; i <= 5; i++)
+;; A[-11*i + 45] = ...
+;; for (long int j = 0; j <= 10; j++)
+;; ... = A[-j];
+
+define void @rdiv8(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, -11
+ %add = add nsw i64 %mul, 45
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc, 6
+ br i1 %cmp, label %for.body, label %for.body4
+
+for.body4: ; preds = %for.body4, %for.body
+ %j.02 = phi i64 [ %inc7, %for.body4 ], [ 0, %for.body ]
+ %B.addr.01 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.body ]
+ %sub = sub nsw i64 0, %j.02
+ %arrayidx5 = getelementptr inbounds i32* %A, i64 %sub
+ %0 = load i32* %arrayidx5, align 4
+; CHECK: da analyze - flow!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc7 = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc7, 11
+ br i1 %cmp2, label %for.body4, label %for.end8
+
+for.end8: ; preds = %for.body4
+ ret void
+}
+
+
+;; for (long int i = 0; i < 5; i++)
+;; for (long int j = 0; j < 10; j++)
+;; A[11*i - j] = ...
+;; ... = A[45];
+
+define void @rdiv9(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc5, %entry
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc5 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc6, %for.inc5 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.body3, %for.cond1.preheader
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, 11
+ %sub = sub nsw i64 %mul, %j.02
+ %arrayidx = getelementptr inbounds i32* %A, i64 %sub
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx4 = getelementptr inbounds i32* %A, i64 45
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc, 10
+ br i1 %cmp2, label %for.body3, label %for.inc5
+
+for.inc5: ; preds = %for.body3
+ %inc6 = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc6, 5
+ br i1 %cmp, label %for.cond1.preheader, label %for.end7
+
+for.end7: ; preds = %for.inc5
+ ret void
+}
+
+
+;; for (long int i = 0; i < 5; i++)
+;; for (long int j = 0; j <= 10; j++)
+;; A[11*i - j] = ...
+;; ... = A[45];
+
+define void @rdiv10(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc5, %entry
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc5 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc6, %for.inc5 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.body3, %for.cond1.preheader
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, 11
+ %sub = sub nsw i64 %mul, %j.02
+ %arrayidx = getelementptr inbounds i32* %A, i64 %sub
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx4 = getelementptr inbounds i32* %A, i64 45
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc, 10
+ br i1 %cmp2, label %for.body3, label %for.inc5
+
+for.inc5: ; preds = %for.body3
+ %inc6 = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc6, 6
+ br i1 %cmp, label %for.cond1.preheader, label %for.end7
+
+for.end7: ; preds = %for.inc5
+ ret void
+}
+
+
+;; for (long int i = 0; i <= 5; i++)
+;; for (long int j = 0; j <= 10; j++)
+;; A[11*i - j] = ...
+;; ... = A[45];
+
+define void @rdiv11(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc5, %entry
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc5 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc6, %for.inc5 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.body3, %for.cond1.preheader
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, 11
+ %sub = sub nsw i64 %mul, %j.02
+ %arrayidx = getelementptr inbounds i32* %A, i64 %sub
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx4 = getelementptr inbounds i32* %A, i64 45
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc, 11
+ br i1 %cmp2, label %for.body3, label %for.inc5
+
+for.inc5: ; preds = %for.body3
+ %inc6 = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc6, 5
+ br i1 %cmp, label %for.cond1.preheader, label %for.end7
+
+for.end7: ; preds = %for.inc5
+ ret void
+}
+
+
+;; for (long int i = 0; i < 5; i++)
+;; for (long int j = 0; j < 10; j++)
+;; A[11*i - j] = ...
+;; ... = A[45];
+
+define void @rdiv12(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc5, %entry
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc5 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc6, %for.inc5 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.body3, %for.cond1.preheader
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, 11
+ %sub = sub nsw i64 %mul, %j.02
+ %arrayidx = getelementptr inbounds i32* %A, i64 %sub
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx4 = getelementptr inbounds i32* %A, i64 45
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - flow [* *|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc, 11
+ br i1 %cmp2, label %for.body3, label %for.inc5
+
+for.inc5: ; preds = %for.body3
+ %inc6 = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc6, 6
+ br i1 %cmp, label %for.cond1.preheader, label %for.end7
+
+for.end7: ; preds = %for.inc5
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/ExactSIV.ll b/llvm/test/Analysis/DependenceAnalysis/ExactSIV.ll
new file mode 100644
index 0000000..71e0502
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/ExactSIV.ll
@@ -0,0 +1,428 @@
+; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
+
+; ModuleID = 'ExactSIV.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; for (long unsigned i = 0; i < 10; i++) {
+;; A[i + 10] = ...
+;; ... = A[2*i + 1];
+
+define void @exact0(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %add = add i64 %i.02, 10
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul = shl i64 %i.02, 1
+ %add13 = or i64 %mul, 1
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %add13
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - flow [<=|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 10
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 10; i++) {
+;; A[4*i + 10] = ...
+;; ... = A[2*i + 1];
+
+define void @exact1(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = shl i64 %i.02, 2
+ %add = add i64 %mul, 10
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul1 = shl i64 %i.02, 1
+ %add23 = or i64 %mul1, 1
+ %arrayidx3 = getelementptr inbounds i32* %A, i64 %add23
+ %0 = load i32* %arrayidx3, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 10
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 10; i++) {
+;; A[6*i] = ...
+;; ... = A[i + 60];
+
+define void @exact2(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul i64 %i.02, 6
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %add = add i64 %i.02, 60
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %add
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 10
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i <= 10; i++) {
+;; A[6*i] = ...
+;; ... = A[i + 60];
+
+define void @exact3(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul i64 %i.02, 6
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %add = add i64 %i.02, 60
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %add
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [>]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 11
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 12; i++) {
+;; A[6*i] = ...
+;; ... = A[i + 60];
+
+define void @exact4(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul i64 %i.02, 6
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %add = add i64 %i.02, 60
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %add
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [>]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 12
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i <= 12; i++) {
+;; A[6*i] = ...
+;; ... = A[i + 60];
+
+define void @exact5(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul i64 %i.02, 6
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %add = add i64 %i.02, 60
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %add
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [=>|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 13
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 18; i++) {
+;; A[6*i] = ...
+;; ... = A[i + 60];
+
+define void @exact6(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul i64 %i.02, 6
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %add = add i64 %i.02, 60
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %add
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [=>|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 18
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i <= 18; i++) {
+;; A[6*i] = ...
+;; ... = A[i + 60];
+
+define void @exact7(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul i64 %i.02, 6
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %add = add i64 %i.02, 60
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %add
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [*|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 19
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 10; i++) {
+;; A[-6*i] = ...
+;; ... = A[-i - 60];
+
+define void @exact8(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul i64 %i.02, -6
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %sub1 = sub i64 -60, %i.02
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %sub1
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 10
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i <= 10; i++) {
+;; A[-6*i] = ...
+;; ... = A[-i - 60];
+
+define void @exact9(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul i64 %i.02, -6
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %sub1 = sub i64 -60, %i.02
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %sub1
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - flow [>]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 11
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 12; i++) {
+;; A[-6*i] = ...
+;; ... = A[-i - 60];
+
+define void @exact10(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul i64 %i.02, -6
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %sub1 = sub i64 -60, %i.02
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %sub1
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - flow [>]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 12
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i <= 12; i++) {
+;; A[-6*i] = ...
+;; ... = A[-i - 60];
+
+define void @exact11(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul i64 %i.02, -6
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %sub1 = sub i64 -60, %i.02
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %sub1
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - flow [=>|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 13
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 18; i++) {
+;; A[-6*i] = ...
+;; ... = A[-i - 60];
+
+define void @exact12(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul i64 %i.02, -6
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %sub1 = sub i64 -60, %i.02
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %sub1
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - flow [=>|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 18
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i <= 18; i++) {
+;; A[-6*i] = ...
+;; ... = A[-i - 60];
+
+define void @exact13(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul i64 %i.02, -6
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %sub1 = sub i64 -60, %i.02
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %sub1
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - flow [*|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 19
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/GCD.ll b/llvm/test/Analysis/DependenceAnalysis/GCD.ll
new file mode 100644
index 0000000..94c93a8
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/GCD.ll
@@ -0,0 +1,597 @@
+; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
+
+; ModuleID = 'GCD.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++)
+;; A[2*i - 4*j] = ...
+;; ... = A[6*i + 8*j];
+
+define void @gcd0(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc8
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %scevgep, %for.inc8 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc9, %for.inc8 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl nsw i64 %i.03, 1
+ %mul4 = shl nsw i64 %j.02, 2
+ %sub = sub nsw i64 %mul, %mul4
+ %arrayidx = getelementptr inbounds i32* %A, i64 %sub
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul5 = mul nsw i64 %i.03, 6
+ %mul6 = shl nsw i64 %j.02, 3
+ %add = add nsw i64 %mul5, %mul6
+ %arrayidx7 = getelementptr inbounds i32* %A, i64 %add
+ %0 = load i32* %arrayidx7, align 4
+; CHECK: da analyze - flow [=> *|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 100
+ br i1 %exitcond, label %for.body3, label %for.inc8
+
+for.inc8: ; preds = %for.body3
+ %scevgep = getelementptr i32* %B.addr.04, i64 100
+ %inc9 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc9, 100
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end10
+
+for.end10: ; preds = %for.inc8
+ ret void
+}
+
+
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++)
+;; A[2*i - 4*j] = ...
+;; ... = A[6*i + 8*j + 1];
+
+define void @gcd1(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc9
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %scevgep, %for.inc9 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc10, %for.inc9 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl nsw i64 %i.03, 1
+ %mul4 = shl nsw i64 %j.02, 2
+ %sub = sub nsw i64 %mul, %mul4
+ %arrayidx = getelementptr inbounds i32* %A, i64 %sub
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul5 = mul nsw i64 %i.03, 6
+ %mul6 = shl nsw i64 %j.02, 3
+ %add = add nsw i64 %mul5, %mul6
+ %add7 = or i64 %add, 1
+ %arrayidx8 = getelementptr inbounds i32* %A, i64 %add7
+ %0 = load i32* %arrayidx8, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 100
+ br i1 %exitcond, label %for.body3, label %for.inc9
+
+for.inc9: ; preds = %for.body3
+ %scevgep = getelementptr i32* %B.addr.04, i64 100
+ %inc10 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc10, 100
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end11
+
+for.end11: ; preds = %for.inc9
+ ret void
+}
+
+
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++)
+;; A[2*i - 4*j + 1] = ...
+;; ... = A[6*i + 8*j];
+
+define void @gcd2(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc9
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %scevgep, %for.inc9 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc10, %for.inc9 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl nsw i64 %i.03, 1
+ %mul4 = shl nsw i64 %j.02, 2
+ %sub = sub nsw i64 %mul, %mul4
+ %add5 = or i64 %sub, 1
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add5
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul5 = mul nsw i64 %i.03, 6
+ %mul6 = shl nsw i64 %j.02, 3
+ %add7 = add nsw i64 %mul5, %mul6
+ %arrayidx8 = getelementptr inbounds i32* %A, i64 %add7
+ %0 = load i32* %arrayidx8, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 100
+ br i1 %exitcond, label %for.body3, label %for.inc9
+
+for.inc9: ; preds = %for.body3
+ %scevgep = getelementptr i32* %B.addr.04, i64 100
+ %inc10 = add nsw i64 %i.03, 1
+ %exitcond6 = icmp ne i64 %inc10, 100
+ br i1 %exitcond6, label %for.cond1.preheader, label %for.end11
+
+for.end11: ; preds = %for.inc9
+ ret void
+}
+
+
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++)
+;; A[i + 2*j] = ...
+;; ... = A[i + 2*j - 1];
+
+define void @gcd3(i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc7
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %scevgep, %for.inc7 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc8, %for.inc7 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl nsw i64 %j.02, 1
+ %add = add nsw i64 %i.03, %mul
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul4 = shl nsw i64 %j.02, 1
+ %add5 = add nsw i64 %i.03, %mul4
+ %sub = add nsw i64 %add5, -1
+ %arrayidx6 = getelementptr inbounds i32* %A, i64 %sub
+ %0 = load i32* %arrayidx6, align 4
+; CHECK: da analyze - flow [<> *]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 100
+ br i1 %exitcond, label %for.body3, label %for.inc7
+
+for.inc7: ; preds = %for.body3
+ %scevgep = getelementptr i32* %B.addr.04, i64 100
+ %inc8 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc8, 100
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end9
+
+for.end9: ; preds = %for.inc7
+ ret void
+}
+
+
+;; void gcd4(int *A, int *B, long int M, long int N) {
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++) {
+;; A[5*i + 10*j*M + 9*M*N] = i;
+;; *B++ = A[15*i + 20*j*M - 21*N*M + 4];
+
+define void @gcd4(i32* %A, i32* %B, i64 %M, i64 %N) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc17
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %scevgep, %for.inc17 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc18, %for.inc17 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, 5
+ %mul4 = mul nsw i64 %j.02, 10
+ %mul5 = mul nsw i64 %mul4, %M
+ %add = add nsw i64 %mul, %mul5
+ %mul6 = mul nsw i64 %M, 9
+ %mul7 = mul nsw i64 %mul6, %N
+ %add8 = add nsw i64 %add, %mul7
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add8
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul9 = mul nsw i64 %i.03, 15
+ %mul10 = mul nsw i64 %j.02, 20
+ %mul11 = mul nsw i64 %mul10, %M
+ %add12 = add nsw i64 %mul9, %mul11
+ %mul13 = mul nsw i64 %N, 21
+ %mul14 = mul nsw i64 %mul13, %M
+ %sub = sub nsw i64 %add12, %mul14
+ %add15 = add nsw i64 %sub, 4
+ %arrayidx16 = getelementptr inbounds i32* %A, i64 %add15
+ %0 = load i32* %arrayidx16, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 100
+ br i1 %exitcond, label %for.body3, label %for.inc17
+
+for.inc17: ; preds = %for.body3
+ %scevgep = getelementptr i32* %B.addr.04, i64 100
+ %inc18 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc18, 100
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end19
+
+for.end19: ; preds = %for.inc17
+ ret void
+}
+
+
+;; void gcd5(int *A, int *B, long int M, long int N) {
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++) {
+;; A[5*i + 10*j*M + 9*M*N] = i;
+;; *B++ = A[15*i + 20*j*M - 21*N*M + 5];
+
+define void @gcd5(i32* %A, i32* %B, i64 %M, i64 %N) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %entry, %for.inc17
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %scevgep, %for.inc17 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc18, %for.inc17 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.cond1.preheader, %for.body3
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, 5
+ %mul4 = mul nsw i64 %j.02, 10
+ %mul5 = mul nsw i64 %mul4, %M
+ %add = add nsw i64 %mul, %mul5
+ %mul6 = mul nsw i64 %M, 9
+ %mul7 = mul nsw i64 %mul6, %N
+ %add8 = add nsw i64 %add, %mul7
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add8
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul9 = mul nsw i64 %i.03, 15
+ %mul10 = mul nsw i64 %j.02, 20
+ %mul11 = mul nsw i64 %mul10, %M
+ %add12 = add nsw i64 %mul9, %mul11
+ %mul13 = mul nsw i64 %N, 21
+ %mul14 = mul nsw i64 %mul13, %M
+ %sub = sub nsw i64 %add12, %mul14
+ %add15 = add nsw i64 %sub, 5
+ %arrayidx16 = getelementptr inbounds i32* %A, i64 %add15
+ %0 = load i32* %arrayidx16, align 4
+; CHECK: da analyze - flow [<> *]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %exitcond = icmp ne i64 %inc, 100
+ br i1 %exitcond, label %for.body3, label %for.inc17
+
+for.inc17: ; preds = %for.body3
+ %scevgep = getelementptr i32* %B.addr.04, i64 100
+ %inc18 = add nsw i64 %i.03, 1
+ %exitcond5 = icmp ne i64 %inc18, 100
+ br i1 %exitcond5, label %for.cond1.preheader, label %for.end19
+
+for.end19: ; preds = %for.inc17
+ ret void
+}
+
+
+;; void gcd6(long int n, int A[][n], int *B) {
+;; for (long int i = 0; i < n; i++)
+;; for (long int j = 0; j < n; j++) {
+;; A[2*i][4*j] = i;
+;; *B++ = A[8*i][6*j + 1];
+
+define void @gcd6(i64 %n, i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ %cmp4 = icmp sgt i64 %n, 0
+ br i1 %cmp4, label %for.cond1.preheader.preheader, label %for.end12
+
+for.cond1.preheader.preheader: ; preds = %entry
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.cond1.preheader.preheader, %for.inc10
+ %i.06 = phi i64 [ %inc11, %for.inc10 ], [ 0, %for.cond1.preheader.preheader ]
+ %B.addr.05 = phi i32* [ %B.addr.1.lcssa, %for.inc10 ], [ %B, %for.cond1.preheader.preheader ]
+ %cmp21 = icmp sgt i64 %n, 0
+ br i1 %cmp21, label %for.body3.preheader, label %for.inc10
+
+for.body3.preheader: ; preds = %for.cond1.preheader
+ br label %for.body3
+
+for.body3: ; preds = %for.body3.preheader, %for.body3
+ %j.03 = phi i64 [ %inc, %for.body3 ], [ 0, %for.body3.preheader ]
+ %B.addr.12 = phi i32* [ %incdec.ptr, %for.body3 ], [ %B.addr.05, %for.body3.preheader ]
+ %conv = trunc i64 %i.06 to i32
+ %mul = shl nsw i64 %j.03, 2
+ %mul4 = shl nsw i64 %i.06, 1
+ %0 = mul nsw i64 %mul4, %n
+ %arrayidx.sum = add i64 %0, %mul
+ %arrayidx5 = getelementptr inbounds i32* %A, i64 %arrayidx.sum
+ store i32 %conv, i32* %arrayidx5, align 4
+ %mul6 = mul nsw i64 %j.03, 6
+ %add7 = or i64 %mul6, 1
+ %mul7 = shl nsw i64 %i.06, 3
+ %1 = mul nsw i64 %mul7, %n
+ %arrayidx8.sum = add i64 %1, %add7
+ %arrayidx9 = getelementptr inbounds i32* %A, i64 %arrayidx8.sum
+ %2 = load i32* %arrayidx9, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.12, i64 1
+ store i32 %2, i32* %B.addr.12, align 4
+ %inc = add nsw i64 %j.03, 1
+ %exitcond = icmp ne i64 %inc, %n
+ br i1 %exitcond, label %for.body3, label %for.inc10.loopexit
+
+for.inc10.loopexit: ; preds = %for.body3
+ %scevgep = getelementptr i32* %B.addr.05, i64 %n
+ br label %for.inc10
+
+for.inc10: ; preds = %for.inc10.loopexit, %for.cond1.preheader
+ %B.addr.1.lcssa = phi i32* [ %B.addr.05, %for.cond1.preheader ], [ %scevgep, %for.inc10.loopexit ]
+ %inc11 = add nsw i64 %i.06, 1
+ %exitcond8 = icmp ne i64 %inc11, %n
+ br i1 %exitcond8, label %for.cond1.preheader, label %for.end12.loopexit
+
+for.end12.loopexit: ; preds = %for.inc10
+ br label %for.end12
+
+for.end12: ; preds = %for.end12.loopexit, %entry
+ ret void
+}
+
+
+;; void gcd7(int n, int A[][n], int *B) {
+;; for (int i = 0; i < n; i++)
+;; for (int j = 0; j < n; j++) {
+;; A[2*i][4*j] = i;
+;; *B++ = A[8*i][6*j + 1];
+
+define void @gcd7(i32 %n, i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ %0 = zext i32 %n to i64
+ %cmp4 = icmp sgt i32 %n, 0
+ br i1 %cmp4, label %for.cond1.preheader.preheader, label %for.end15
+
+for.cond1.preheader.preheader: ; preds = %entry
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.cond1.preheader.preheader, %for.inc13
+ %indvars.iv8 = phi i64 [ 0, %for.cond1.preheader.preheader ], [ %indvars.iv.next9, %for.inc13 ]
+ %B.addr.05 = phi i32* [ %B.addr.1.lcssa, %for.inc13 ], [ %B, %for.cond1.preheader.preheader ]
+ %1 = add i32 %n, -1
+ %2 = zext i32 %1 to i64
+ %3 = add i64 %2, 1
+ %cmp21 = icmp sgt i32 %n, 0
+ br i1 %cmp21, label %for.body3.preheader, label %for.inc13
+
+for.body3.preheader: ; preds = %for.cond1.preheader
+ br label %for.body3
+
+for.body3: ; preds = %for.body3.preheader, %for.body3
+ %indvars.iv = phi i64 [ 0, %for.body3.preheader ], [ %indvars.iv.next, %for.body3 ]
+ %B.addr.12 = phi i32* [ %incdec.ptr, %for.body3 ], [ %B.addr.05, %for.body3.preheader ]
+ %4 = trunc i64 %indvars.iv to i32
+ %mul = shl nsw i32 %4, 2
+ %idxprom = sext i32 %mul to i64
+ %5 = trunc i64 %indvars.iv8 to i32
+ %mul4 = shl nsw i32 %5, 1
+ %idxprom5 = sext i32 %mul4 to i64
+ %6 = mul nsw i64 %idxprom5, %0
+ %arrayidx.sum = add i64 %6, %idxprom
+ %arrayidx6 = getelementptr inbounds i32* %A, i64 %arrayidx.sum
+ %7 = trunc i64 %indvars.iv8 to i32
+ store i32 %7, i32* %arrayidx6, align 4
+ %8 = trunc i64 %indvars.iv to i32
+ %mul7 = mul nsw i32 %8, 6
+ %add7 = or i32 %mul7, 1
+ %idxprom8 = sext i32 %add7 to i64
+ %9 = trunc i64 %indvars.iv8 to i32
+ %mul9 = shl nsw i32 %9, 3
+ %idxprom10 = sext i32 %mul9 to i64
+ %10 = mul nsw i64 %idxprom10, %0
+ %arrayidx11.sum = add i64 %10, %idxprom8
+ %arrayidx12 = getelementptr inbounds i32* %A, i64 %arrayidx11.sum
+ %11 = load i32* %arrayidx12, align 4
+; CHECK: da analyze - flow [* *|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.12, i64 1
+ store i32 %11, i32* %B.addr.12, align 4
+ %indvars.iv.next = add i64 %indvars.iv, 1
+ %lftr.wideiv = trunc i64 %indvars.iv.next to i32
+ %exitcond = icmp ne i32 %lftr.wideiv, %n
+ br i1 %exitcond, label %for.body3, label %for.inc13.loopexit
+
+for.inc13.loopexit: ; preds = %for.body3
+ %scevgep = getelementptr i32* %B.addr.05, i64 %3
+ br label %for.inc13
+
+for.inc13: ; preds = %for.inc13.loopexit, %for.cond1.preheader
+ %B.addr.1.lcssa = phi i32* [ %B.addr.05, %for.cond1.preheader ], [ %scevgep, %for.inc13.loopexit ]
+ %indvars.iv.next9 = add i64 %indvars.iv8, 1
+ %lftr.wideiv10 = trunc i64 %indvars.iv.next9 to i32
+ %exitcond11 = icmp ne i32 %lftr.wideiv10, %n
+ br i1 %exitcond11, label %for.cond1.preheader, label %for.end15.loopexit
+
+for.end15.loopexit: ; preds = %for.inc13
+ br label %for.end15
+
+for.end15: ; preds = %for.end15.loopexit, %entry
+ ret void
+}
+
+
+;; void gcd8(int n, int *A, int *B) {
+;; for (int i = 0; i < n; i++)
+;; for (int j = 0; j < n; j++) {
+;; A[n*2*i + 4*j] = i;
+;; *B++ = A[n*8*i + 6*j + 1];
+
+define void @gcd8(i32 %n, i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ %cmp4 = icmp sgt i32 %n, 0
+ br i1 %cmp4, label %for.cond1.preheader.preheader, label %for.end15
+
+for.cond1.preheader.preheader: ; preds = %entry
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.cond1.preheader.preheader, %for.inc13
+ %i.06 = phi i32 [ %inc14, %for.inc13 ], [ 0, %for.cond1.preheader.preheader ]
+ %B.addr.05 = phi i32* [ %B.addr.1.lcssa, %for.inc13 ], [ %B, %for.cond1.preheader.preheader ]
+ %0 = add i32 %n, -1
+ %1 = zext i32 %0 to i64
+ %2 = add i64 %1, 1
+ %cmp21 = icmp sgt i32 %n, 0
+ br i1 %cmp21, label %for.body3.preheader, label %for.inc13
+
+for.body3.preheader: ; preds = %for.cond1.preheader
+ br label %for.body3
+
+for.body3: ; preds = %for.body3.preheader, %for.body3
+ %indvars.iv = phi i64 [ 0, %for.body3.preheader ], [ %indvars.iv.next, %for.body3 ]
+ %B.addr.12 = phi i32* [ %incdec.ptr, %for.body3 ], [ %B.addr.05, %for.body3.preheader ]
+ %mul = shl nsw i32 %n, 1
+ %mul4 = mul nsw i32 %mul, %i.06
+ %3 = trunc i64 %indvars.iv to i32
+ %mul5 = shl nsw i32 %3, 2
+ %add = add nsw i32 %mul4, %mul5
+ %idxprom = sext i32 %add to i64
+ %arrayidx = getelementptr inbounds i32* %A, i64 %idxprom
+ store i32 %i.06, i32* %arrayidx, align 4
+ %mul6 = shl nsw i32 %n, 3
+ %mul7 = mul nsw i32 %mul6, %i.06
+ %4 = trunc i64 %indvars.iv to i32
+ %mul8 = mul nsw i32 %4, 6
+ %add9 = add nsw i32 %mul7, %mul8
+ %add10 = or i32 %add9, 1
+ %idxprom11 = sext i32 %add10 to i64
+ %arrayidx12 = getelementptr inbounds i32* %A, i64 %idxprom11
+ %5 = load i32* %arrayidx12, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.12, i64 1
+ store i32 %5, i32* %B.addr.12, align 4
+ %indvars.iv.next = add i64 %indvars.iv, 1
+ %lftr.wideiv = trunc i64 %indvars.iv.next to i32
+ %exitcond = icmp ne i32 %lftr.wideiv, %n
+ br i1 %exitcond, label %for.body3, label %for.inc13.loopexit
+
+for.inc13.loopexit: ; preds = %for.body3
+ %scevgep = getelementptr i32* %B.addr.05, i64 %2
+ br label %for.inc13
+
+for.inc13: ; preds = %for.inc13.loopexit, %for.cond1.preheader
+ %B.addr.1.lcssa = phi i32* [ %B.addr.05, %for.cond1.preheader ], [ %scevgep, %for.inc13.loopexit ]
+ %inc14 = add nsw i32 %i.06, 1
+ %exitcond7 = icmp ne i32 %inc14, %n
+ br i1 %exitcond7, label %for.cond1.preheader, label %for.end15.loopexit
+
+for.end15.loopexit: ; preds = %for.inc13
+ br label %for.end15
+
+for.end15: ; preds = %for.end15.loopexit, %entry
+ ret void
+}
+
+
+;; void gcd9(unsigned n, int A[][n], int *B) {
+;; for (unsigned i = 0; i < n; i++)
+;; for (unsigned j = 0; j < n; j++) {
+;; A[2*i][4*j] = i;
+;; *B++ = A[8*i][6*j + 1];
+
+define void @gcd9(i32 %n, i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ %0 = zext i32 %n to i64
+ %cmp4 = icmp eq i32 %n, 0
+ br i1 %cmp4, label %for.end15, label %for.cond1.preheader.preheader
+
+for.cond1.preheader.preheader: ; preds = %entry
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.cond1.preheader.preheader, %for.inc13
+ %indvars.iv8 = phi i64 [ 0, %for.cond1.preheader.preheader ], [ %indvars.iv.next9, %for.inc13 ]
+ %B.addr.05 = phi i32* [ %B.addr.1.lcssa, %for.inc13 ], [ %B, %for.cond1.preheader.preheader ]
+ %1 = add i32 %n, -1
+ %2 = zext i32 %1 to i64
+ %3 = add i64 %2, 1
+ %cmp21 = icmp eq i32 %n, 0
+ br i1 %cmp21, label %for.inc13, label %for.body3.preheader
+
+for.body3.preheader: ; preds = %for.cond1.preheader
+ br label %for.body3
+
+for.body3: ; preds = %for.body3.preheader, %for.body3
+ %indvars.iv = phi i64 [ 0, %for.body3.preheader ], [ %indvars.iv.next, %for.body3 ]
+ %B.addr.12 = phi i32* [ %incdec.ptr, %for.body3 ], [ %B.addr.05, %for.body3.preheader ]
+ %4 = trunc i64 %indvars.iv to i32
+ %mul = shl i32 %4, 2
+ %idxprom = zext i32 %mul to i64
+ %5 = trunc i64 %indvars.iv8 to i32
+ %mul4 = shl i32 %5, 1
+ %idxprom5 = zext i32 %mul4 to i64
+ %6 = mul nsw i64 %idxprom5, %0
+ %arrayidx.sum = add i64 %6, %idxprom
+ %arrayidx6 = getelementptr inbounds i32* %A, i64 %arrayidx.sum
+ %7 = trunc i64 %indvars.iv8 to i32
+ store i32 %7, i32* %arrayidx6, align 4
+ %8 = trunc i64 %indvars.iv to i32
+ %mul7 = mul i32 %8, 6
+ %add7 = or i32 %mul7, 1
+ %idxprom8 = zext i32 %add7 to i64
+ %9 = trunc i64 %indvars.iv8 to i32
+ %mul9 = shl i32 %9, 3
+ %idxprom10 = zext i32 %mul9 to i64
+ %10 = mul nsw i64 %idxprom10, %0
+ %arrayidx11.sum = add i64 %10, %idxprom8
+ %arrayidx12 = getelementptr inbounds i32* %A, i64 %arrayidx11.sum
+ %11 = load i32* %arrayidx12, align 4
+; CHECK: da analyze - flow [* *|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.12, i64 1
+ store i32 %11, i32* %B.addr.12, align 4
+ %indvars.iv.next = add i64 %indvars.iv, 1
+ %lftr.wideiv = trunc i64 %indvars.iv.next to i32
+ %exitcond = icmp ne i32 %lftr.wideiv, %n
+ br i1 %exitcond, label %for.body3, label %for.inc13.loopexit
+
+for.inc13.loopexit: ; preds = %for.body3
+ %scevgep = getelementptr i32* %B.addr.05, i64 %3
+ br label %for.inc13
+
+for.inc13: ; preds = %for.inc13.loopexit, %for.cond1.preheader
+ %B.addr.1.lcssa = phi i32* [ %B.addr.05, %for.cond1.preheader ], [ %scevgep, %for.inc13.loopexit ]
+ %indvars.iv.next9 = add i64 %indvars.iv8, 1
+ %lftr.wideiv10 = trunc i64 %indvars.iv.next9 to i32
+ %exitcond11 = icmp ne i32 %lftr.wideiv10, %n
+ br i1 %exitcond11, label %for.cond1.preheader, label %for.end15.loopexit
+
+for.end15.loopexit: ; preds = %for.inc13
+ br label %for.end15
+
+for.end15: ; preds = %for.end15.loopexit, %entry
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/Preliminary.ll b/llvm/test/Analysis/DependenceAnalysis/Preliminary.ll
new file mode 100644
index 0000000..3ef63fd
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/Preliminary.ll
@@ -0,0 +1,469 @@
+; RUN: opt < %s -analyze -basicaa -indvars -da | FileCheck %s
+
+; This series of tests is more interesting when debugging is enabled.
+
+; ModuleID = 'Preliminary.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; may alias
+;; int p0(int n, int *A, int *B) {
+;; A[0] = n;
+;; return B[1];
+
+define i32 @p0(i32 %n, i32* %A, i32* %B) nounwind uwtable ssp {
+entry:
+ store i32 %n, i32* %A, align 4
+ %arrayidx1 = getelementptr inbounds i32* %B, i64 1
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - confused!
+ ret i32 %0
+}
+
+
+;; no alias
+;; int p1(int n, int *restrict A, int *restrict B) {
+;; A[0] = n;
+;; return B[1];
+
+define i32 @p1(i32 %n, i32* noalias %A, i32* noalias %B) nounwind uwtable ssp {
+entry:
+ store i32 %n, i32* %A, align 4
+ %arrayidx1 = getelementptr inbounds i32* %B, i64 1
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - none!
+ ret i32 %0
+}
+
+;; check loop nesting levels
+;; for (long int i = 0; i < n; i++)
+;; for (long int j = 0; j < n; j++)
+;; for (long int k = 0; k < n; k++)
+;; A[i][j][k] = ...
+;; for (long int k = 0; k < n; k++)
+;; ... = A[i + 3][j + 2][k + 1];
+
+define void @p2(i64 %n, [100 x [100 x i64]]* %A, i64* %B) nounwind uwtable ssp {
+entry:
+ %cmp10 = icmp sgt i64 %n, 0
+ br i1 %cmp10, label %for.cond1.preheader, label %for.end26
+
+for.cond1.preheader: ; preds = %for.inc24, %entry
+ %B.addr.012 = phi i64* [ %B.addr.1.lcssa, %for.inc24 ], [ %B, %entry ]
+ %i.011 = phi i64 [ %inc25, %for.inc24 ], [ 0, %entry ]
+ %cmp26 = icmp sgt i64 %n, 0
+ br i1 %cmp26, label %for.cond4.preheader, label %for.inc24
+
+for.cond4.preheader: ; preds = %for.inc21, %for.cond1.preheader
+ %B.addr.18 = phi i64* [ %B.addr.2.lcssa, %for.inc21 ], [ %B.addr.012, %for.cond1.preheader ]
+ %j.07 = phi i64 [ %inc22, %for.inc21 ], [ 0, %for.cond1.preheader ]
+ %cmp51 = icmp sgt i64 %n, 0
+ br i1 %cmp51, label %for.body6, label %for.cond10.loopexit
+
+for.body6: ; preds = %for.body6, %for.cond4.preheader
+ %k.02 = phi i64 [ %inc, %for.body6 ], [ 0, %for.cond4.preheader ]
+ %arrayidx8 = getelementptr inbounds [100 x [100 x i64]]* %A, i64 %i.011, i64 %j.07, i64 %k.02
+ store i64 %i.011, i64* %arrayidx8, align 8
+ %inc = add nsw i64 %k.02, 1
+ %cmp5 = icmp slt i64 %inc, %n
+ br i1 %cmp5, label %for.body6, label %for.cond10.loopexit
+
+for.cond10.loopexit: ; preds = %for.body6, %for.cond4.preheader
+ %cmp113 = icmp sgt i64 %n, 0
+ br i1 %cmp113, label %for.body12, label %for.inc21
+
+for.body12: ; preds = %for.body12, %for.cond10.loopexit
+ %k9.05 = phi i64 [ %inc19, %for.body12 ], [ 0, %for.cond10.loopexit ]
+ %B.addr.24 = phi i64* [ %incdec.ptr, %for.body12 ], [ %B.addr.18, %for.cond10.loopexit ]
+ %add = add nsw i64 %k9.05, 1
+ %add13 = add nsw i64 %j.07, 2
+ %add14 = add nsw i64 %i.011, 3
+ %arrayidx17 = getelementptr inbounds [100 x [100 x i64]]* %A, i64 %add14, i64 %add13, i64 %add
+ %0 = load i64* %arrayidx17, align 8
+; CHECK: da analyze - flow [-3 -2]!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.24, i64 1
+ store i64 %0, i64* %B.addr.24, align 8
+ %inc19 = add nsw i64 %k9.05, 1
+ %cmp11 = icmp slt i64 %inc19, %n
+ br i1 %cmp11, label %for.body12, label %for.inc21
+
+for.inc21: ; preds = %for.body12, %for.cond10.loopexit
+ %B.addr.2.lcssa = phi i64* [ %B.addr.18, %for.cond10.loopexit ], [ %incdec.ptr, %for.body12 ]
+ %inc22 = add nsw i64 %j.07, 1
+ %cmp2 = icmp slt i64 %inc22, %n
+ br i1 %cmp2, label %for.cond4.preheader, label %for.inc24
+
+for.inc24: ; preds = %for.inc21, %for.cond1.preheader
+ %B.addr.1.lcssa = phi i64* [ %B.addr.012, %for.cond1.preheader ], [ %B.addr.2.lcssa, %for.inc21 ]
+ %inc25 = add nsw i64 %i.011, 1
+ %cmp = icmp slt i64 %inc25, %n
+ br i1 %cmp, label %for.cond1.preheader, label %for.end26
+
+for.end26: ; preds = %for.inc24, %entry
+ ret void
+}
+
+
+;; classify subscripts
+;; for (long int i = 0; i < n; i++)
+;; for (long int j = 0; j < n; j++)
+;; for (long int k = 0; k < n; k++)
+;; for (long int l = 0; l < n; l++)
+;; for (long int m = 0; m < n; m++)
+;; for (long int o = 0; o < n; o++)
+;; for (long int p = 0; p < n; p++)
+;; for (long int q = 0; q < n; q++)
+;; for (long int r = 0; r < n; r++)
+;; for (long int s = 0; s < n; s++)
+;; for (long int u = 0; u < n; u++)
+;; for (long int t = 0; t < n; t++) {
+;; A[i - 3] [j] [2] [k-1] [2*l + 1] [m] [p + q] [r + s] = ...
+;; ... = A[i + 3] [2] [u] [1-k] [3*l - 1] [o] [1 + n] [t + 2];
+
+define void @p3(i64 %n, [100 x [100 x [100 x [100 x [100 x [100 x [100 x i64]]]]]]]* %A, i64* %B) nounwind uwtable ssp {
+entry:
+ %cmp44 = icmp sgt i64 %n, 0
+ br i1 %cmp44, label %for.cond1.preheader, label %for.end90
+
+for.cond1.preheader: ; preds = %for.inc88, %entry
+ %B.addr.046 = phi i64* [ %B.addr.1.lcssa, %for.inc88 ], [ %B, %entry ]
+ %i.045 = phi i64 [ %inc89, %for.inc88 ], [ 0, %entry ]
+ %cmp240 = icmp sgt i64 %n, 0
+ br i1 %cmp240, label %for.cond4.preheader, label %for.inc88
+
+for.cond4.preheader: ; preds = %for.inc85, %for.cond1.preheader
+ %B.addr.142 = phi i64* [ %B.addr.2.lcssa, %for.inc85 ], [ %B.addr.046, %for.cond1.preheader ]
+ %j.041 = phi i64 [ %inc86, %for.inc85 ], [ 0, %for.cond1.preheader ]
+ %cmp536 = icmp sgt i64 %n, 0
+ br i1 %cmp536, label %for.cond7.preheader, label %for.inc85
+
+for.cond7.preheader: ; preds = %for.inc82, %for.cond4.preheader
+ %B.addr.238 = phi i64* [ %B.addr.3.lcssa, %for.inc82 ], [ %B.addr.142, %for.cond4.preheader ]
+ %k.037 = phi i64 [ %inc83, %for.inc82 ], [ 0, %for.cond4.preheader ]
+ %cmp832 = icmp sgt i64 %n, 0
+ br i1 %cmp832, label %for.cond10.preheader, label %for.inc82
+
+for.cond10.preheader: ; preds = %for.inc79, %for.cond7.preheader
+ %B.addr.334 = phi i64* [ %B.addr.4.lcssa, %for.inc79 ], [ %B.addr.238, %for.cond7.preheader ]
+ %l.033 = phi i64 [ %inc80, %for.inc79 ], [ 0, %for.cond7.preheader ]
+ %cmp1128 = icmp sgt i64 %n, 0
+ br i1 %cmp1128, label %for.cond13.preheader, label %for.inc79
+
+for.cond13.preheader: ; preds = %for.inc76, %for.cond10.preheader
+ %B.addr.430 = phi i64* [ %B.addr.5.lcssa, %for.inc76 ], [ %B.addr.334, %for.cond10.preheader ]
+ %m.029 = phi i64 [ %inc77, %for.inc76 ], [ 0, %for.cond10.preheader ]
+ %cmp1424 = icmp sgt i64 %n, 0
+ br i1 %cmp1424, label %for.cond16.preheader, label %for.inc76
+
+for.cond16.preheader: ; preds = %for.inc73, %for.cond13.preheader
+ %B.addr.526 = phi i64* [ %B.addr.6.lcssa, %for.inc73 ], [ %B.addr.430, %for.cond13.preheader ]
+ %o.025 = phi i64 [ %inc74, %for.inc73 ], [ 0, %for.cond13.preheader ]
+ %cmp1720 = icmp sgt i64 %n, 0
+ br i1 %cmp1720, label %for.cond19.preheader, label %for.inc73
+
+for.cond19.preheader: ; preds = %for.inc70, %for.cond16.preheader
+ %B.addr.622 = phi i64* [ %B.addr.7.lcssa, %for.inc70 ], [ %B.addr.526, %for.cond16.preheader ]
+ %p.021 = phi i64 [ %inc71, %for.inc70 ], [ 0, %for.cond16.preheader ]
+ %cmp2016 = icmp sgt i64 %n, 0
+ br i1 %cmp2016, label %for.cond22.preheader, label %for.inc70
+
+for.cond22.preheader: ; preds = %for.inc67, %for.cond19.preheader
+ %B.addr.718 = phi i64* [ %B.addr.8.lcssa, %for.inc67 ], [ %B.addr.622, %for.cond19.preheader ]
+ %q.017 = phi i64 [ %inc68, %for.inc67 ], [ 0, %for.cond19.preheader ]
+ %cmp2312 = icmp sgt i64 %n, 0
+ br i1 %cmp2312, label %for.cond25.preheader, label %for.inc67
+
+for.cond25.preheader: ; preds = %for.inc64, %for.cond22.preheader
+ %B.addr.814 = phi i64* [ %B.addr.9.lcssa, %for.inc64 ], [ %B.addr.718, %for.cond22.preheader ]
+ %r.013 = phi i64 [ %inc65, %for.inc64 ], [ 0, %for.cond22.preheader ]
+ %cmp268 = icmp sgt i64 %n, 0
+ br i1 %cmp268, label %for.cond28.preheader, label %for.inc64
+
+for.cond28.preheader: ; preds = %for.inc61, %for.cond25.preheader
+ %B.addr.910 = phi i64* [ %B.addr.10.lcssa, %for.inc61 ], [ %B.addr.814, %for.cond25.preheader ]
+ %s.09 = phi i64 [ %inc62, %for.inc61 ], [ 0, %for.cond25.preheader ]
+ %cmp294 = icmp sgt i64 %n, 0
+ br i1 %cmp294, label %for.cond31.preheader, label %for.inc61
+
+for.cond31.preheader: ; preds = %for.inc58, %for.cond28.preheader
+ %u.06 = phi i64 [ %inc59, %for.inc58 ], [ 0, %for.cond28.preheader ]
+ %B.addr.105 = phi i64* [ %B.addr.11.lcssa, %for.inc58 ], [ %B.addr.910, %for.cond28.preheader ]
+ %cmp321 = icmp sgt i64 %n, 0
+ br i1 %cmp321, label %for.body33, label %for.inc58
+
+for.body33: ; preds = %for.body33, %for.cond31.preheader
+ %t.03 = phi i64 [ %inc, %for.body33 ], [ 0, %for.cond31.preheader ]
+ %B.addr.112 = phi i64* [ %incdec.ptr, %for.body33 ], [ %B.addr.105, %for.cond31.preheader ]
+ %add = add nsw i64 %r.013, %s.09
+ %add34 = add nsw i64 %p.021, %q.017
+ %mul = shl nsw i64 %l.033, 1
+ %add3547 = or i64 %mul, 1
+ %sub = add nsw i64 %k.037, -1
+ %sub36 = add nsw i64 %i.045, -3
+ %arrayidx43 = getelementptr inbounds [100 x [100 x [100 x [100 x [100 x [100 x [100 x i64]]]]]]]* %A, i64 %sub36, i64 %j.041, i64 2, i64 %sub, i64 %add3547, i64 %m.029, i64 %add34, i64 %add
+ store i64 %i.045, i64* %arrayidx43, align 8
+ %add44 = add nsw i64 %t.03, 2
+ %add45 = add nsw i64 %n, 1
+ %mul46 = mul nsw i64 %l.033, 3
+ %sub47 = add nsw i64 %mul46, -1
+ %sub48 = sub nsw i64 1, %k.037
+ %add49 = add nsw i64 %i.045, 3
+ %arrayidx57 = getelementptr inbounds [100 x [100 x [100 x [100 x [100 x [100 x [100 x i64]]]]]]]* %A, i64 %add49, i64 2, i64 %u.06, i64 %sub48, i64 %sub47, i64 %o.025, i64 %add45, i64 %add44
+ %0 = load i64* %arrayidx57, align 8
+; CHECK: da analyze - flow [-6 * * => * * * * * * * *] splitable!
+; CHECK: da analyze - split level = 3, iteration = 1!
+ %incdec.ptr = getelementptr inbounds i64* %B.addr.112, i64 1
+ store i64 %0, i64* %B.addr.112, align 8
+ %inc = add nsw i64 %t.03, 1
+ %cmp32 = icmp slt i64 %inc, %n
+ br i1 %cmp32, label %for.body33, label %for.inc58
+
+for.inc58: ; preds = %for.body33, %for.cond31.preheader
+ %B.addr.11.lcssa = phi i64* [ %B.addr.105, %for.cond31.preheader ], [ %incdec.ptr, %for.body33 ]
+ %inc59 = add nsw i64 %u.06, 1
+ %cmp29 = icmp slt i64 %inc59, %n
+ br i1 %cmp29, label %for.cond31.preheader, label %for.inc61
+
+for.inc61: ; preds = %for.inc58, %for.cond28.preheader
+ %B.addr.10.lcssa = phi i64* [ %B.addr.910, %for.cond28.preheader ], [ %B.addr.11.lcssa, %for.inc58 ]
+ %inc62 = add nsw i64 %s.09, 1
+ %cmp26 = icmp slt i64 %inc62, %n
+ br i1 %cmp26, label %for.cond28.preheader, label %for.inc64
+
+for.inc64: ; preds = %for.inc61, %for.cond25.preheader
+ %B.addr.9.lcssa = phi i64* [ %B.addr.814, %for.cond25.preheader ], [ %B.addr.10.lcssa, %for.inc61 ]
+ %inc65 = add nsw i64 %r.013, 1
+ %cmp23 = icmp slt i64 %inc65, %n
+ br i1 %cmp23, label %for.cond25.preheader, label %for.inc67
+
+for.inc67: ; preds = %for.inc64, %for.cond22.preheader
+ %B.addr.8.lcssa = phi i64* [ %B.addr.718, %for.cond22.preheader ], [ %B.addr.9.lcssa, %for.inc64 ]
+ %inc68 = add nsw i64 %q.017, 1
+ %cmp20 = icmp slt i64 %inc68, %n
+ br i1 %cmp20, label %for.cond22.preheader, label %for.inc70
+
+for.inc70: ; preds = %for.inc67, %for.cond19.preheader
+ %B.addr.7.lcssa = phi i64* [ %B.addr.622, %for.cond19.preheader ], [ %B.addr.8.lcssa, %for.inc67 ]
+ %inc71 = add nsw i64 %p.021, 1
+ %cmp17 = icmp slt i64 %inc71, %n
+ br i1 %cmp17, label %for.cond19.preheader, label %for.inc73
+
+for.inc73: ; preds = %for.inc70, %for.cond16.preheader
+ %B.addr.6.lcssa = phi i64* [ %B.addr.526, %for.cond16.preheader ], [ %B.addr.7.lcssa, %for.inc70 ]
+ %inc74 = add nsw i64 %o.025, 1
+ %cmp14 = icmp slt i64 %inc74, %n
+ br i1 %cmp14, label %for.cond16.preheader, label %for.inc76
+
+for.inc76: ; preds = %for.inc73, %for.cond13.preheader
+ %B.addr.5.lcssa = phi i64* [ %B.addr.430, %for.cond13.preheader ], [ %B.addr.6.lcssa, %for.inc73 ]
+ %inc77 = add nsw i64 %m.029, 1
+ %cmp11 = icmp slt i64 %inc77, %n
+ br i1 %cmp11, label %for.cond13.preheader, label %for.inc79
+
+for.inc79: ; preds = %for.inc76, %for.cond10.preheader
+ %B.addr.4.lcssa = phi i64* [ %B.addr.334, %for.cond10.preheader ], [ %B.addr.5.lcssa, %for.inc76 ]
+ %inc80 = add nsw i64 %l.033, 1
+ %cmp8 = icmp slt i64 %inc80, %n
+ br i1 %cmp8, label %for.cond10.preheader, label %for.inc82
+
+for.inc82: ; preds = %for.inc79, %for.cond7.preheader
+ %B.addr.3.lcssa = phi i64* [ %B.addr.238, %for.cond7.preheader ], [ %B.addr.4.lcssa, %for.inc79 ]
+ %inc83 = add nsw i64 %k.037, 1
+ %cmp5 = icmp slt i64 %inc83, %n
+ br i1 %cmp5, label %for.cond7.preheader, label %for.inc85
+
+for.inc85: ; preds = %for.inc82, %for.cond4.preheader
+ %B.addr.2.lcssa = phi i64* [ %B.addr.142, %for.cond4.preheader ], [ %B.addr.3.lcssa, %for.inc82 ]
+ %inc86 = add nsw i64 %j.041, 1
+ %cmp2 = icmp slt i64 %inc86, %n
+ br i1 %cmp2, label %for.cond4.preheader, label %for.inc88
+
+for.inc88: ; preds = %for.inc85, %for.cond1.preheader
+ %B.addr.1.lcssa = phi i64* [ %B.addr.046, %for.cond1.preheader ], [ %B.addr.2.lcssa, %for.inc85 ]
+ %inc89 = add nsw i64 %i.045, 1
+ %cmp = icmp slt i64 %inc89, %n
+ br i1 %cmp, label %for.cond1.preheader, label %for.end90
+
+for.end90: ; preds = %for.inc88, %entry
+ ret void
+}
+
+
+;; cleanup around chars, shorts, ints
+;;void p4(int *A, int *B, long int n)
+;; for (char i = 0; i < n; i++)
+;; A[i + 2] = ...
+;; ... = A[i];
+
+define void @p4(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp sgt i64 %n, 0
+ br i1 %cmp1, label %for.body, label %for.end
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i8 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv2 = sext i8 %i.03 to i32
+ %conv3 = sext i8 %i.03 to i64
+ %add = add i64 %conv3, 2
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv2, i32* %arrayidx, align 4
+ %idxprom4 = sext i8 %i.03 to i64
+ %arrayidx5 = getelementptr inbounds i32* %A, i64 %idxprom4
+ %0 = load i32* %arrayidx5, align 4
+; CHECK: da analyze - flow [*|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add i8 %i.03, 1
+ %conv = sext i8 %inc to i64
+ %cmp = icmp slt i64 %conv, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;;void p5(int *A, int *B, long int n)
+;; for (short i = 0; i < n; i++)
+;; A[i + 2] = ...
+;; ... = A[i];
+
+define void @p5(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp sgt i64 %n, 0
+ br i1 %cmp1, label %for.body, label %for.end
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i16 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv2 = sext i16 %i.03 to i32
+ %conv3 = sext i16 %i.03 to i64
+ %add = add i64 %conv3, 2
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv2, i32* %arrayidx, align 4
+ %idxprom4 = sext i16 %i.03 to i64
+ %arrayidx5 = getelementptr inbounds i32* %A, i64 %idxprom4
+ %0 = load i32* %arrayidx5, align 4
+; CHECK: da analyze - flow [*|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add i16 %i.03, 1
+ %conv = sext i16 %inc to i64
+ %cmp = icmp slt i64 %conv, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;;void p6(int *A, int *B, long int n)
+;; for (int i = 0; i < n; i++)
+;; A[i + 2] = ...
+;; ... = A[i];
+
+define void @p6(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp sgt i64 %n, 0
+ br i1 %cmp1, label %for.body, label %for.end
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %add = add nsw i32 %i.03, 2
+ %idxprom = sext i32 %add to i64
+ %arrayidx = getelementptr inbounds i32* %A, i64 %idxprom
+ store i32 %i.03, i32* %arrayidx, align 4
+ %idxprom2 = sext i32 %i.03 to i64
+ %arrayidx3 = getelementptr inbounds i32* %A, i64 %idxprom2
+ %0 = load i32* %arrayidx3, align 4
+; CHECK: da analyze - consistent flow [2]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add nsw i32 %i.03, 1
+ %conv = sext i32 %inc to i64
+ %cmp = icmp slt i64 %conv, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;;void p7(unsigned *A, unsigned *B, char n)
+;; A[n] = ...
+;; ... = A[n + 1];
+
+define void @p7(i32* %A, i32* %B, i8 signext %n) nounwind uwtable ssp {
+entry:
+ %idxprom = sext i8 %n to i64
+ %arrayidx = getelementptr inbounds i32* %A, i64 %idxprom
+ store i32 0, i32* %arrayidx, align 4
+ %conv = sext i8 %n to i64
+ %add = add i64 %conv, 1
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %add
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - none!
+ store i32 %0, i32* %B, align 4
+ ret void
+}
+
+
+
+;;void p8(unsigned *A, unsigned *B, short n)
+;; A[n] = ...
+;; ... = A[n + 1];
+
+define void @p8(i32* %A, i32* %B, i16 signext %n) nounwind uwtable ssp {
+entry:
+ %idxprom = sext i16 %n to i64
+ %arrayidx = getelementptr inbounds i32* %A, i64 %idxprom
+ store i32 0, i32* %arrayidx, align 4
+ %conv = sext i16 %n to i64
+ %add = add i64 %conv, 1
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %add
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - none!
+ store i32 %0, i32* %B, align 4
+ ret void
+}
+
+
+;;void p9(unsigned *A, unsigned *B, int n)
+;; A[n] = ...
+;; ... = A[n + 1];
+
+define void @p9(i32* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ %idxprom = sext i32 %n to i64
+ %arrayidx = getelementptr inbounds i32* %A, i64 %idxprom
+ store i32 0, i32* %arrayidx, align 4
+ %add = add nsw i32 %n, 1
+ %idxprom1 = sext i32 %add to i64
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %idxprom1
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - none!
+ store i32 %0, i32* %B, align 4
+ ret void
+}
+
+
+;;void p10(unsigned *A, unsigned *B, unsigned n)
+;; A[n] = ...
+;; ... = A[n + 1];
+
+define void @p10(i32* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ %idxprom = zext i32 %n to i64
+ %arrayidx = getelementptr inbounds i32* %A, i64 %idxprom
+ store i32 0, i32* %arrayidx, align 4
+ %add = add i32 %n, 1
+ %idxprom1 = zext i32 %add to i64
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %idxprom1
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - none!
+ store i32 %0, i32* %B, align 4
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/Propagating.ll b/llvm/test/Analysis/DependenceAnalysis/Propagating.ll
new file mode 100644
index 0000000..076348c
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/Propagating.ll
@@ -0,0 +1,467 @@
+; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
+
+; ModuleID = 'Propagating.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++)
+;; A[i + 1][i + j] = i;
+;; *B++ = A[i][i + j];
+
+define void @prop0([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc9, %entry
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc9 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc10, %for.inc9 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.body3, %for.cond1.preheader
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %add = add nsw i64 %i.03, %j.02
+ %add4 = add nsw i64 %i.03, 1
+ %arrayidx5 = getelementptr inbounds [100 x i32]* %A, i64 %add4, i64 %add
+ store i32 %conv, i32* %arrayidx5, align 4
+ %add6 = add nsw i64 %i.03, %j.02
+ %arrayidx8 = getelementptr inbounds [100 x i32]* %A, i64 %i.03, i64 %add6
+ %0 = load i32* %arrayidx8, align 4
+; CHECK: da analyze - consistent flow [1 -1]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc, 100
+ br i1 %cmp2, label %for.body3, label %for.inc9
+
+for.inc9: ; preds = %for.body3
+ %inc10 = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc10, 100
+ br i1 %cmp, label %for.cond1.preheader, label %for.end11
+
+for.end11: ; preds = %for.inc9
+ ret void
+}
+
+
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++)
+;; for (long int k = 0; k < 100; k++)
+;; A[j - i][i + 1][j + k] = ...
+;; ... = A[j - i][i][j + k];
+
+define void @prop1([100 x [100 x i32]]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc18, %entry
+ %B.addr.06 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc18 ]
+ %i.05 = phi i64 [ 0, %entry ], [ %inc19, %for.inc18 ]
+ br label %for.cond4.preheader
+
+for.cond4.preheader: ; preds = %for.inc15, %for.cond1.preheader
+ %B.addr.14 = phi i32* [ %B.addr.06, %for.cond1.preheader ], [ %incdec.ptr, %for.inc15 ]
+ %j.03 = phi i64 [ 0, %for.cond1.preheader ], [ %inc16, %for.inc15 ]
+ br label %for.body6
+
+for.body6: ; preds = %for.body6, %for.cond4.preheader
+ %k.02 = phi i64 [ 0, %for.cond4.preheader ], [ %inc, %for.body6 ]
+ %B.addr.21 = phi i32* [ %B.addr.14, %for.cond4.preheader ], [ %incdec.ptr, %for.body6 ]
+ %conv = trunc i64 %i.05 to i32
+ %add = add nsw i64 %j.03, %k.02
+ %add7 = add nsw i64 %i.05, 1
+ %sub = sub nsw i64 %j.03, %i.05
+ %arrayidx9 = getelementptr inbounds [100 x [100 x i32]]* %A, i64 %sub, i64 %add7, i64 %add
+ store i32 %conv, i32* %arrayidx9, align 4
+ %add10 = add nsw i64 %j.03, %k.02
+ %sub11 = sub nsw i64 %j.03, %i.05
+ %arrayidx14 = getelementptr inbounds [100 x [100 x i32]]* %A, i64 %sub11, i64 %i.05, i64 %add10
+ %0 = load i32* %arrayidx14, align 4
+; CHECK: da analyze - consistent flow [1 1 -1]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.21, i64 1
+ store i32 %0, i32* %B.addr.21, align 4
+ %inc = add nsw i64 %k.02, 1
+ %cmp5 = icmp slt i64 %inc, 100
+ br i1 %cmp5, label %for.body6, label %for.inc15
+
+for.inc15: ; preds = %for.body6
+ %inc16 = add nsw i64 %j.03, 1
+ %cmp2 = icmp slt i64 %inc16, 100
+ br i1 %cmp2, label %for.cond4.preheader, label %for.inc18
+
+for.inc18: ; preds = %for.inc15
+ %inc19 = add nsw i64 %i.05, 1
+ %cmp = icmp slt i64 %inc19, 100
+ br i1 %cmp, label %for.cond1.preheader, label %for.end20
+
+for.end20: ; preds = %for.inc18
+ ret void
+}
+
+
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++)
+;; A[i - 1][2*i] = ...
+;; ... = A[i][i + j + 110];
+
+define void @prop2([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc8, %entry
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc8 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc9, %for.inc8 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.body3, %for.cond1.preheader
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl nsw i64 %i.03, 1
+ %sub = add nsw i64 %i.03, -1
+ %arrayidx4 = getelementptr inbounds [100 x i32]* %A, i64 %sub, i64 %mul
+ store i32 %conv, i32* %arrayidx4, align 4
+ %add = add nsw i64 %i.03, %j.02
+ %add5 = add nsw i64 %add, 110
+ %arrayidx7 = getelementptr inbounds [100 x i32]* %A, i64 %i.03, i64 %add5
+ %0 = load i32* %arrayidx7, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc, 100
+ br i1 %cmp2, label %for.body3, label %for.inc8
+
+for.inc8: ; preds = %for.body3
+ %inc9 = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc9, 100
+ br i1 %cmp, label %for.cond1.preheader, label %for.end10
+
+for.end10: ; preds = %for.inc8
+ ret void
+}
+
+
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++)
+;; A[i][2*j + i] = ...
+;; ... = A[i][2*j - i + 5];
+
+define void @prop3([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc9, %entry
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc9 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc10, %for.inc9 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.body3, %for.cond1.preheader
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl nsw i64 %j.02, 1
+ %add = add nsw i64 %mul, %i.03
+ %arrayidx4 = getelementptr inbounds [100 x i32]* %A, i64 %i.03, i64 %add
+ store i32 %conv, i32* %arrayidx4, align 4
+ %mul5 = shl nsw i64 %j.02, 1
+ %sub = sub nsw i64 %mul5, %i.03
+ %add6 = add nsw i64 %sub, 5
+ %arrayidx8 = getelementptr inbounds [100 x i32]* %A, i64 %i.03, i64 %add6
+ %0 = load i32* %arrayidx8, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc, 100
+ br i1 %cmp2, label %for.body3, label %for.inc9
+
+for.inc9: ; preds = %for.body3
+ %inc10 = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc10, 100
+ br i1 %cmp, label %for.cond1.preheader, label %for.end11
+
+for.end11: ; preds = %for.inc9
+ ret void
+}
+
+
+;; propagate Distance
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++)
+;; A[i + 2][2*i + j + 1] = ...
+;; ... = A[i][2*i + j];
+
+define void @prop4([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc11, %entry
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc11 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc12, %for.inc11 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.body3, %for.cond1.preheader
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl nsw i64 %i.03, 1
+ %add = add nsw i64 %mul, %j.02
+ %add4 = add nsw i64 %add, 1
+ %add5 = add nsw i64 %i.03, 2
+ %arrayidx6 = getelementptr inbounds [100 x i32]* %A, i64 %add5, i64 %add4
+ store i32 %conv, i32* %arrayidx6, align 4
+ %mul7 = shl nsw i64 %i.03, 1
+ %add8 = add nsw i64 %mul7, %j.02
+ %arrayidx10 = getelementptr inbounds [100 x i32]* %A, i64 %i.03, i64 %add8
+ %0 = load i32* %arrayidx10, align 4
+; CHECK: da analyze - consistent flow [2 -3]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc, 100
+ br i1 %cmp2, label %for.body3, label %for.inc11
+
+for.inc11: ; preds = %for.body3
+ %inc12 = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc12, 100
+ br i1 %cmp, label %for.cond1.preheader, label %for.end13
+
+for.end13: ; preds = %for.inc11
+ ret void
+}
+
+
+;; propagate Point
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++)
+;; A[3*i - 18][22 - i][2*i + j] = ...
+;; ... = A[i][i][3*i + j];
+
+define void @prop5([100 x [100 x i32]]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc13, %entry
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc13 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc14, %for.inc13 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.body3, %for.cond1.preheader
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl nsw i64 %i.03, 1
+ %add = add nsw i64 %mul, %j.02
+ %sub = sub nsw i64 22, %i.03
+ %mul4 = mul nsw i64 %i.03, 3
+ %sub5 = add nsw i64 %mul4, -18
+ %arrayidx7 = getelementptr inbounds [100 x [100 x i32]]* %A, i64 %sub5, i64 %sub, i64 %add
+ store i32 %conv, i32* %arrayidx7, align 4
+ %mul8 = mul nsw i64 %i.03, 3
+ %add9 = add nsw i64 %mul8, %j.02
+ %arrayidx12 = getelementptr inbounds [100 x [100 x i32]]* %A, i64 %i.03, i64 %i.03, i64 %add9
+ %0 = load i32* %arrayidx12, align 4
+; CHECK: da analyze - flow [< -16] splitable!
+; CHECK: da analyze - split level = 1, iteration = 11!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc, 100
+ br i1 %cmp2, label %for.body3, label %for.inc13
+
+for.inc13: ; preds = %for.body3
+ %inc14 = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc14, 100
+ br i1 %cmp, label %for.cond1.preheader, label %for.end15
+
+for.end15: ; preds = %for.inc13
+ ret void
+}
+
+
+;; propagate Line
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++)
+;; A[i + 1][4*i + j + 2] = ...
+;; ... = A[2*i][8*i + j];
+
+define void @prop6([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc12, %entry
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc12 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc13, %for.inc12 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.body3, %for.cond1.preheader
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl nsw i64 %i.03, 2
+ %add = add nsw i64 %mul, %j.02
+ %add4 = add nsw i64 %add, 2
+ %add5 = add nsw i64 %i.03, 1
+ %arrayidx6 = getelementptr inbounds [100 x i32]* %A, i64 %add5, i64 %add4
+ store i32 %conv, i32* %arrayidx6, align 4
+ %mul7 = shl nsw i64 %i.03, 3
+ %add8 = add nsw i64 %mul7, %j.02
+ %mul9 = shl nsw i64 %i.03, 1
+ %arrayidx11 = getelementptr inbounds [100 x i32]* %A, i64 %mul9, i64 %add8
+ %0 = load i32* %arrayidx11, align 4
+; CHECK: da analyze - flow [=> -2]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc, 100
+ br i1 %cmp2, label %for.body3, label %for.inc12
+
+for.inc12: ; preds = %for.body3
+ %inc13 = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc13, 100
+ br i1 %cmp, label %for.cond1.preheader, label %for.end14
+
+for.end14: ; preds = %for.inc12
+ ret void
+}
+
+
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++)
+;; A[2*i + 4][-5*i + j + 2] = ...
+;; ... = A[-2*i + 20][5*i + j];
+
+define void @prop7([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc14, %entry
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc14 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc15, %for.inc14 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.body3, %for.cond1.preheader
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, -5
+ %add = add nsw i64 %mul, %j.02
+ %add4 = add nsw i64 %add, 2
+ %mul5 = shl nsw i64 %i.03, 1
+ %add6 = add nsw i64 %mul5, 4
+ %arrayidx7 = getelementptr inbounds [100 x i32]* %A, i64 %add6, i64 %add4
+ store i32 %conv, i32* %arrayidx7, align 4
+ %mul8 = mul nsw i64 %i.03, 5
+ %add9 = add nsw i64 %mul8, %j.02
+ %mul10 = mul nsw i64 %i.03, -2
+ %add11 = add nsw i64 %mul10, 20
+ %arrayidx13 = getelementptr inbounds [100 x i32]* %A, i64 %add11, i64 %add9
+ %0 = load i32* %arrayidx13, align 4
+; CHECK: da analyze - flow [* -38] splitable!
+; CHECK: da analyze - split level = 1, iteration = 4!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc, 100
+ br i1 %cmp2, label %for.body3, label %for.inc14
+
+for.inc14: ; preds = %for.body3
+ %inc15 = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc15, 100
+ br i1 %cmp, label %for.cond1.preheader, label %for.end16
+
+for.end16: ; preds = %for.inc14
+ ret void
+}
+
+
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++)
+;; A[4][j + 2] = ...
+;; ... = A[-2*i + 4][5*i + j];
+
+define void @prop8([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc10, %entry
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc10 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc11, %for.inc10 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.body3, %for.cond1.preheader
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %add = add nsw i64 %j.02, 2
+ %arrayidx4 = getelementptr inbounds [100 x i32]* %A, i64 4, i64 %add
+ store i32 %conv, i32* %arrayidx4, align 4
+ %mul = mul nsw i64 %i.03, 5
+ %add5 = add nsw i64 %mul, %j.02
+ %mul6 = mul nsw i64 %i.03, -2
+ %add7 = add nsw i64 %mul6, 4
+ %arrayidx9 = getelementptr inbounds [100 x i32]* %A, i64 %add7, i64 %add5
+ %0 = load i32* %arrayidx9, align 4
+; CHECK: da analyze - flow [p<= 2]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc, 100
+ br i1 %cmp2, label %for.body3, label %for.inc10
+
+for.inc10: ; preds = %for.body3
+ %inc11 = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc11, 100
+ br i1 %cmp, label %for.cond1.preheader, label %for.end12
+
+for.end12: ; preds = %for.inc10
+ ret void
+}
+
+
+;; for (long int i = 0; i < 100; i++)
+;; for (long int j = 0; j < 100; j++)
+;; A[2*i + 4][5*i + j + 2] = ...
+;; ... = A[4][j];
+
+define void @prop9([100 x i32]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc10, %entry
+ %B.addr.04 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc10 ]
+ %i.03 = phi i64 [ 0, %entry ], [ %inc11, %for.inc10 ]
+ br label %for.body3
+
+for.body3: ; preds = %for.body3, %for.cond1.preheader
+ %j.02 = phi i64 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
+ %B.addr.11 = phi i32* [ %B.addr.04, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, 5
+ %add = add nsw i64 %mul, %j.02
+ %add4 = add nsw i64 %add, 2
+ %mul5 = shl nsw i64 %i.03, 1
+ %add6 = add nsw i64 %mul5, 4
+ %arrayidx7 = getelementptr inbounds [100 x i32]* %A, i64 %add6, i64 %add4
+ store i32 %conv, i32* %arrayidx7, align 4
+ %arrayidx9 = getelementptr inbounds [100 x i32]* %A, i64 4, i64 %j.02
+ %0 = load i32* %arrayidx9, align 4
+; CHECK: da analyze - flow [p<= 2]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.11, i64 1
+ store i32 %0, i32* %B.addr.11, align 4
+ %inc = add nsw i64 %j.02, 1
+ %cmp2 = icmp slt i64 %inc, 100
+ br i1 %cmp2, label %for.body3, label %for.inc10
+
+for.inc10: ; preds = %for.body3
+ %inc11 = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc11, 100
+ br i1 %cmp, label %for.cond1.preheader, label %for.end12
+
+for.end12: ; preds = %for.inc10
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/Separability.ll b/llvm/test/Analysis/DependenceAnalysis/Separability.ll
new file mode 100644
index 0000000..d42d3cd
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/Separability.ll
@@ -0,0 +1,267 @@
+; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
+
+; ModuleID = 'Separability.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; for (long int i = 0; i < 50; i++)
+;; for (long int j = 0; j < 50; j++)
+;; for (long int k = 0; k < 50; k++)
+;; for (long int l = 0; l < 50; l++)
+;; A[n][i][j + k] = ...
+;; ... = A[10][i + 10][2*j - l];
+
+define void @sep0([100 x [100 x i32]]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc22, %entry
+ %B.addr.08 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc22 ]
+ %i.07 = phi i64 [ 0, %entry ], [ %inc23, %for.inc22 ]
+ br label %for.cond4.preheader
+
+for.cond4.preheader: ; preds = %for.inc19, %for.cond1.preheader
+ %B.addr.16 = phi i32* [ %B.addr.08, %for.cond1.preheader ], [ %incdec.ptr, %for.inc19 ]
+ %j.05 = phi i64 [ 0, %for.cond1.preheader ], [ %inc20, %for.inc19 ]
+ br label %for.cond7.preheader
+
+for.cond7.preheader: ; preds = %for.inc16, %for.cond4.preheader
+ %B.addr.24 = phi i32* [ %B.addr.16, %for.cond4.preheader ], [ %incdec.ptr, %for.inc16 ]
+ %k.03 = phi i64 [ 0, %for.cond4.preheader ], [ %inc17, %for.inc16 ]
+ br label %for.body9
+
+for.body9: ; preds = %for.body9, %for.cond7.preheader
+ %l.02 = phi i64 [ 0, %for.cond7.preheader ], [ %inc, %for.body9 ]
+ %B.addr.31 = phi i32* [ %B.addr.24, %for.cond7.preheader ], [ %incdec.ptr, %for.body9 ]
+ %conv = trunc i64 %i.07 to i32
+ %add = add nsw i64 %j.05, %k.03
+ %idxprom = sext i32 %n to i64
+ %arrayidx11 = getelementptr inbounds [100 x [100 x i32]]* %A, i64 %idxprom, i64 %i.07, i64 %add
+ store i32 %conv, i32* %arrayidx11, align 4
+ %mul = shl nsw i64 %j.05, 1
+ %sub = sub nsw i64 %mul, %l.02
+ %add12 = add nsw i64 %i.07, 10
+ %arrayidx15 = getelementptr inbounds [100 x [100 x i32]]* %A, i64 10, i64 %add12, i64 %sub
+ %0 = load i32* %arrayidx15, align 4
+; CHECK: da analyze - flow [-10 * * *]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.31, i64 1
+ store i32 %0, i32* %B.addr.31, align 4
+ %inc = add nsw i64 %l.02, 1
+ %cmp8 = icmp slt i64 %inc, 50
+ br i1 %cmp8, label %for.body9, label %for.inc16
+
+for.inc16: ; preds = %for.body9
+ %inc17 = add nsw i64 %k.03, 1
+ %cmp5 = icmp slt i64 %inc17, 50
+ br i1 %cmp5, label %for.cond7.preheader, label %for.inc19
+
+for.inc19: ; preds = %for.inc16
+ %inc20 = add nsw i64 %j.05, 1
+ %cmp2 = icmp slt i64 %inc20, 50
+ br i1 %cmp2, label %for.cond4.preheader, label %for.inc22
+
+for.inc22: ; preds = %for.inc19
+ %inc23 = add nsw i64 %i.07, 1
+ %cmp = icmp slt i64 %inc23, 50
+ br i1 %cmp, label %for.cond1.preheader, label %for.end24
+
+for.end24: ; preds = %for.inc22
+ ret void
+}
+
+
+;; for (long int i = 0; i < 50; i++)
+;; for (long int j = 0; j < 50; j++)
+;; for (long int k = 0; k < 50; k++)
+;; for (long int l = 0; l < 50; l++)
+;; A[i][i][j + k] = ...
+;; ... = A[10][i + 10][2*j - l];
+
+define void @sep1([100 x [100 x i32]]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc22, %entry
+ %B.addr.08 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc22 ]
+ %i.07 = phi i64 [ 0, %entry ], [ %inc23, %for.inc22 ]
+ br label %for.cond4.preheader
+
+for.cond4.preheader: ; preds = %for.inc19, %for.cond1.preheader
+ %B.addr.16 = phi i32* [ %B.addr.08, %for.cond1.preheader ], [ %incdec.ptr, %for.inc19 ]
+ %j.05 = phi i64 [ 0, %for.cond1.preheader ], [ %inc20, %for.inc19 ]
+ br label %for.cond7.preheader
+
+for.cond7.preheader: ; preds = %for.inc16, %for.cond4.preheader
+ %B.addr.24 = phi i32* [ %B.addr.16, %for.cond4.preheader ], [ %incdec.ptr, %for.inc16 ]
+ %k.03 = phi i64 [ 0, %for.cond4.preheader ], [ %inc17, %for.inc16 ]
+ br label %for.body9
+
+for.body9: ; preds = %for.body9, %for.cond7.preheader
+ %l.02 = phi i64 [ 0, %for.cond7.preheader ], [ %inc, %for.body9 ]
+ %B.addr.31 = phi i32* [ %B.addr.24, %for.cond7.preheader ], [ %incdec.ptr, %for.body9 ]
+ %conv = trunc i64 %i.07 to i32
+ %add = add nsw i64 %j.05, %k.03
+ %arrayidx11 = getelementptr inbounds [100 x [100 x i32]]* %A, i64 %i.07, i64 %i.07, i64 %add
+ store i32 %conv, i32* %arrayidx11, align 4
+ %mul = shl nsw i64 %j.05, 1
+ %sub = sub nsw i64 %mul, %l.02
+ %add12 = add nsw i64 %i.07, 10
+ %arrayidx15 = getelementptr inbounds [100 x [100 x i32]]* %A, i64 10, i64 %add12, i64 %sub
+ %0 = load i32* %arrayidx15, align 4
+; CHECK: da analyze - flow [> * * *]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.31, i64 1
+ store i32 %0, i32* %B.addr.31, align 4
+ %inc = add nsw i64 %l.02, 1
+ %cmp8 = icmp slt i64 %inc, 50
+ br i1 %cmp8, label %for.body9, label %for.inc16
+
+for.inc16: ; preds = %for.body9
+ %inc17 = add nsw i64 %k.03, 1
+ %cmp5 = icmp slt i64 %inc17, 50
+ br i1 %cmp5, label %for.cond7.preheader, label %for.inc19
+
+for.inc19: ; preds = %for.inc16
+ %inc20 = add nsw i64 %j.05, 1
+ %cmp2 = icmp slt i64 %inc20, 50
+ br i1 %cmp2, label %for.cond4.preheader, label %for.inc22
+
+for.inc22: ; preds = %for.inc19
+ %inc23 = add nsw i64 %i.07, 1
+ %cmp = icmp slt i64 %inc23, 50
+ br i1 %cmp, label %for.cond1.preheader, label %for.end24
+
+for.end24: ; preds = %for.inc22
+ ret void
+}
+
+
+;; for (long int i = 0; i < 50; i++)
+;; for (long int j = 0; j < 50; j++)
+;; for (long int k = 0; k < 50; k++)
+;; for (long int l = 0; l < 50; l++)
+;; A[i][i][i + k][l] = ...
+;; ... = A[10][i + 10][j + k][l + 10];
+
+define void @sep2([100 x [100 x [100 x i32]]]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc26, %entry
+ %B.addr.08 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc26 ]
+ %i.07 = phi i64 [ 0, %entry ], [ %inc27, %for.inc26 ]
+ br label %for.cond4.preheader
+
+for.cond4.preheader: ; preds = %for.inc23, %for.cond1.preheader
+ %B.addr.16 = phi i32* [ %B.addr.08, %for.cond1.preheader ], [ %incdec.ptr, %for.inc23 ]
+ %j.05 = phi i64 [ 0, %for.cond1.preheader ], [ %inc24, %for.inc23 ]
+ br label %for.cond7.preheader
+
+for.cond7.preheader: ; preds = %for.inc20, %for.cond4.preheader
+ %B.addr.24 = phi i32* [ %B.addr.16, %for.cond4.preheader ], [ %incdec.ptr, %for.inc20 ]
+ %k.03 = phi i64 [ 0, %for.cond4.preheader ], [ %inc21, %for.inc20 ]
+ br label %for.body9
+
+for.body9: ; preds = %for.body9, %for.cond7.preheader
+ %l.02 = phi i64 [ 0, %for.cond7.preheader ], [ %inc, %for.body9 ]
+ %B.addr.31 = phi i32* [ %B.addr.24, %for.cond7.preheader ], [ %incdec.ptr, %for.body9 ]
+ %conv = trunc i64 %i.07 to i32
+ %add = add nsw i64 %i.07, %k.03
+ %arrayidx12 = getelementptr inbounds [100 x [100 x [100 x i32]]]* %A, i64 %i.07, i64 %i.07, i64 %add, i64 %l.02
+ store i32 %conv, i32* %arrayidx12, align 4
+ %add13 = add nsw i64 %l.02, 10
+ %add14 = add nsw i64 %j.05, %k.03
+ %add15 = add nsw i64 %i.07, 10
+ %arrayidx19 = getelementptr inbounds [100 x [100 x [100 x i32]]]* %A, i64 10, i64 %add15, i64 %add14, i64 %add13
+ %0 = load i32* %arrayidx19, align 4
+; CHECK: da analyze - flow [> * * -10]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.31, i64 1
+ store i32 %0, i32* %B.addr.31, align 4
+ %inc = add nsw i64 %l.02, 1
+ %cmp8 = icmp slt i64 %inc, 50
+ br i1 %cmp8, label %for.body9, label %for.inc20
+
+for.inc20: ; preds = %for.body9
+ %inc21 = add nsw i64 %k.03, 1
+ %cmp5 = icmp slt i64 %inc21, 50
+ br i1 %cmp5, label %for.cond7.preheader, label %for.inc23
+
+for.inc23: ; preds = %for.inc20
+ %inc24 = add nsw i64 %j.05, 1
+ %cmp2 = icmp slt i64 %inc24, 50
+ br i1 %cmp2, label %for.cond4.preheader, label %for.inc26
+
+for.inc26: ; preds = %for.inc23
+ %inc27 = add nsw i64 %i.07, 1
+ %cmp = icmp slt i64 %inc27, 50
+ br i1 %cmp, label %for.cond1.preheader, label %for.end28
+
+for.end28: ; preds = %for.inc26
+ ret void
+}
+
+
+;; for (long int i = 0; i < 50; i++)
+;; for (long int j = 0; j < 50; j++)
+;; for (long int k = 0; k < 50; k++)
+;; for (long int l = 0; l < 50; l++)
+;; A[i][i][i + k][l + k] = ...
+;; ... = A[10][i + 10][j + k][l + 10];
+
+define void @sep3([100 x [100 x [100 x i32]]]* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc27, %entry
+ %B.addr.08 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.inc27 ]
+ %i.07 = phi i64 [ 0, %entry ], [ %inc28, %for.inc27 ]
+ br label %for.cond4.preheader
+
+for.cond4.preheader: ; preds = %for.inc24, %for.cond1.preheader
+ %B.addr.16 = phi i32* [ %B.addr.08, %for.cond1.preheader ], [ %incdec.ptr, %for.inc24 ]
+ %j.05 = phi i64 [ 0, %for.cond1.preheader ], [ %inc25, %for.inc24 ]
+ br label %for.cond7.preheader
+
+for.cond7.preheader: ; preds = %for.inc21, %for.cond4.preheader
+ %B.addr.24 = phi i32* [ %B.addr.16, %for.cond4.preheader ], [ %incdec.ptr, %for.inc21 ]
+ %k.03 = phi i64 [ 0, %for.cond4.preheader ], [ %inc22, %for.inc21 ]
+ br label %for.body9
+
+for.body9: ; preds = %for.body9, %for.cond7.preheader
+ %l.02 = phi i64 [ 0, %for.cond7.preheader ], [ %inc, %for.body9 ]
+ %B.addr.31 = phi i32* [ %B.addr.24, %for.cond7.preheader ], [ %incdec.ptr, %for.body9 ]
+ %conv = trunc i64 %i.07 to i32
+ %add = add nsw i64 %l.02, %k.03
+ %add10 = add nsw i64 %i.07, %k.03
+ %arrayidx13 = getelementptr inbounds [100 x [100 x [100 x i32]]]* %A, i64 %i.07, i64 %i.07, i64 %add10, i64 %add
+ store i32 %conv, i32* %arrayidx13, align 4
+ %add14 = add nsw i64 %l.02, 10
+ %add15 = add nsw i64 %j.05, %k.03
+ %add16 = add nsw i64 %i.07, 10
+ %arrayidx20 = getelementptr inbounds [100 x [100 x [100 x i32]]]* %A, i64 10, i64 %add16, i64 %add15, i64 %add14
+ %0 = load i32* %arrayidx20, align 4
+; CHECK: da analyze - flow [> * * *]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.31, i64 1
+ store i32 %0, i32* %B.addr.31, align 4
+ %inc = add nsw i64 %l.02, 1
+ %cmp8 = icmp slt i64 %inc, 50
+ br i1 %cmp8, label %for.body9, label %for.inc21
+
+for.inc21: ; preds = %for.body9
+ %inc22 = add nsw i64 %k.03, 1
+ %cmp5 = icmp slt i64 %inc22, 50
+ br i1 %cmp5, label %for.cond7.preheader, label %for.inc24
+
+for.inc24: ; preds = %for.inc21
+ %inc25 = add nsw i64 %j.05, 1
+ %cmp2 = icmp slt i64 %inc25, 50
+ br i1 %cmp2, label %for.cond4.preheader, label %for.inc27
+
+for.inc27: ; preds = %for.inc24
+ %inc28 = add nsw i64 %i.07, 1
+ %cmp = icmp slt i64 %inc28, 50
+ br i1 %cmp, label %for.cond1.preheader, label %for.end29
+
+for.end29: ; preds = %for.inc27
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/StrongSIV.ll b/llvm/test/Analysis/DependenceAnalysis/StrongSIV.ll
new file mode 100644
index 0000000..be336c3
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/StrongSIV.ll
@@ -0,0 +1,342 @@
+; RUN: opt < %s -analyze -basicaa -indvars -da | FileCheck %s
+
+; ModuleID = 'StrongSIV.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; for (int i = 0; i < n; i++)
+;; A[i + 2] = ...
+;; ... = A[i];
+
+define void @strong0(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp sgt i64 %n, 0
+ br i1 %cmp1, label %for.body, label %for.end
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %add = add nsw i32 %i.03, 2
+ %idxprom = sext i32 %add to i64
+ %arrayidx = getelementptr inbounds i32* %A, i64 %idxprom
+ store i32 %i.03, i32* %arrayidx, align 4
+ %idxprom2 = sext i32 %i.03 to i64
+ %arrayidx3 = getelementptr inbounds i32* %A, i64 %idxprom2
+ %0 = load i32* %arrayidx3, align 4
+; CHECK: da analyze - consistent flow [2]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add nsw i32 %i.03, 1
+ %conv = sext i32 %inc to i64
+ %cmp = icmp slt i64 %conv, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (long int i = 0; i < n; i++)
+;; A[i + 2] = ...
+;; ... = A[i];
+
+define void @strong1(i32* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ %conv = sext i32 %n to i64
+ %cmp1 = icmp sgt i32 %n, 0
+ br i1 %cmp1, label %for.body, label %for.end
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv2 = trunc i64 %i.03 to i32
+ %add = add nsw i64 %i.03, 2
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv2, i32* %arrayidx, align 4
+ %arrayidx3 = getelementptr inbounds i32* %A, i64 %i.03
+ %0 = load i32* %arrayidx3, align 4
+; CHECK: da analyze - consistent flow [2]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp slt i64 %inc, %conv
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < n; i++)
+;; A[i + 2] = ...
+;; ... = A[i];
+
+define void @strong2(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %add = add i64 %i.03, 2
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %i.03
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - consistent flow [2]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (int i = 0; i < n; i++)
+;; A[i + 2] = ...
+;; ... = A[i];
+
+define void @strong3(i32* %A, i32* %B, i32 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp sgt i32 %n, 0
+ br i1 %cmp1, label %for.body, label %for.end
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %add = add nsw i32 %i.03, 2
+ %idxprom = sext i32 %add to i64
+ %arrayidx = getelementptr inbounds i32* %A, i64 %idxprom
+ store i32 %i.03, i32* %arrayidx, align 4
+ %idxprom1 = sext i32 %i.03 to i64
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %idxprom1
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - consistent flow [2]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add nsw i32 %i.03, 1
+ %cmp = icmp slt i32 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 19; i++)
+;; A[i + 19] = ...
+;; ... = A[i];
+
+define void @strong4(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %add = add i64 %i.02, 19
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %i.02
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 19
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 20; i++)
+;; A[i + 19] = ...
+;; ... = A[i];
+
+define void @strong5(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %add = add i64 %i.02, 19
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %i.02
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - consistent flow [19]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 20
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 20; i++)
+;; A[2*i + 6] = ...
+;; ... = A[2*i];
+
+define void @strong6(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = shl i64 %i.02, 1
+ %add = add i64 %mul, 6
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul1 = shl i64 %i.02, 1
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %mul1
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - consistent flow [3]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 20
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 20; i++)
+;; A[2*i + 7] = ...
+;; ... = A[2*i];
+
+define void @strong7(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = shl i64 %i.02, 1
+ %add = add i64 %mul, 7
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul1 = shl i64 %i.02, 1
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %mul1
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 20
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 20; i++)
+;; A[i + n] = ...
+;; ... = A[i];
+
+define void @strong8(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %add = add i64 %i.02, %n
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %i.02
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - consistent flow [%n|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 20
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < n; i++)
+;; A[i + n] = ...
+;; ... = A[i + 2*n];
+
+define void @strong9(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %add = add i64 %i.03, %n
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul = shl i64 %n, 1
+ %add1 = add i64 %i.03, %mul
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %add1
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 1000; i++)
+;; A[n*i + 5] = ...
+;; ... = A[n*i + 5];
+
+define void @strong10(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = mul i64 %i.02, %n
+ %add = add i64 %mul, 5
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul1 = mul i64 %i.02, %n
+ %add2 = add i64 %mul1, 5
+ %arrayidx3 = getelementptr inbounds i32* %A, i64 %add2
+ %0 = load i32* %arrayidx3, align 4
+; CHECK: da analyze - consistent flow [0|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 1000
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/SymbolicRDIV.ll b/llvm/test/Analysis/DependenceAnalysis/SymbolicRDIV.ll
new file mode 100644
index 0000000..2a1b4e7
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/SymbolicRDIV.ll
@@ -0,0 +1,312 @@
+; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
+
+; ModuleID = 'SymbolicRDIV.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; for (long int i = 0; i < n1; i++)
+;; A[2*i + n1] = ...
+;; for (long int j = 0; j < n2; j++)
+;; ... = A[3*j + 3*n1];
+
+define void @symbolicrdiv0(i32* %A, i32* %B, i64 %n1, i64 %n2) nounwind uwtable ssp {
+entry:
+ %cmp4 = icmp eq i64 %n1, 0
+ br i1 %cmp4, label %for.cond1.preheader, label %for.body
+
+for.cond1.preheader: ; preds = %for.body, %entry
+ %cmp21 = icmp eq i64 %n2, 0
+ br i1 %cmp21, label %for.end11, label %for.body4
+
+for.body: ; preds = %for.body, %entry
+ %i.05 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %conv = trunc i64 %i.05 to i32
+ %mul = shl nsw i64 %i.05, 1
+ %add = add i64 %mul, %n1
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.05, 1
+ %cmp = icmp ult i64 %inc, %n1
+ br i1 %cmp, label %for.body, label %for.cond1.preheader
+
+for.body4: ; preds = %for.body4, %for.cond1.preheader
+ %j.03 = phi i64 [ %inc10, %for.body4 ], [ 0, %for.cond1.preheader ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.cond1.preheader ]
+ %mul56 = add i64 %j.03, %n1
+ %add7 = mul i64 %mul56, 3
+ %arrayidx8 = getelementptr inbounds i32* %A, i64 %add7
+ %0 = load i32* %arrayidx8, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc10 = add nsw i64 %j.03, 1
+ %cmp2 = icmp ult i64 %inc10, %n2
+ br i1 %cmp2, label %for.body4, label %for.end11
+
+for.end11: ; preds = %for.body4, %for.cond1.preheader
+ ret void
+}
+
+
+;; for (long int i = 0; i < n1; i++)
+;; A[2*i + 5*n2] = ...
+;; for (long int j = 0; j < n2; j++)
+;; ... = A[3*j + 2*n2];
+
+define void @symbolicrdiv1(i32* %A, i32* %B, i64 %n1, i64 %n2) nounwind uwtable ssp {
+entry:
+ %cmp4 = icmp eq i64 %n1, 0
+ br i1 %cmp4, label %for.cond2.preheader, label %for.body
+
+for.cond2.preheader: ; preds = %for.body, %entry
+ %cmp31 = icmp eq i64 %n2, 0
+ br i1 %cmp31, label %for.end12, label %for.body5
+
+for.body: ; preds = %for.body, %entry
+ %i.05 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %conv = trunc i64 %i.05 to i32
+ %mul = shl nsw i64 %i.05, 1
+ %mul1 = mul i64 %n2, 5
+ %add = add i64 %mul, %mul1
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.05, 1
+ %cmp = icmp ult i64 %inc, %n1
+ br i1 %cmp, label %for.body, label %for.cond2.preheader
+
+for.body5: ; preds = %for.body5, %for.cond2.preheader
+ %j.03 = phi i64 [ %inc11, %for.body5 ], [ 0, %for.cond2.preheader ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body5 ], [ %B, %for.cond2.preheader ]
+ %mul6 = mul nsw i64 %j.03, 3
+ %mul7 = shl i64 %n2, 1
+ %add8 = add i64 %mul6, %mul7
+ %arrayidx9 = getelementptr inbounds i32* %A, i64 %add8
+ %0 = load i32* %arrayidx9, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc11 = add nsw i64 %j.03, 1
+ %cmp3 = icmp ult i64 %inc11, %n2
+ br i1 %cmp3, label %for.body5, label %for.end12
+
+for.end12: ; preds = %for.body5, %for.cond2.preheader
+ ret void
+}
+
+
+;; for (long int i = 0; i < n1; i++)
+;; A[2*i - n2] = ...
+;; for (long int j = 0; j < n2; j++)
+;; ... = A[-j + 2*n1];
+
+define void @symbolicrdiv2(i32* %A, i32* %B, i64 %n1, i64 %n2) nounwind uwtable ssp {
+entry:
+ %cmp4 = icmp eq i64 %n1, 0
+ br i1 %cmp4, label %for.cond1.preheader, label %for.body
+
+for.cond1.preheader: ; preds = %for.body, %entry
+ %cmp21 = icmp eq i64 %n2, 0
+ br i1 %cmp21, label %for.end10, label %for.body4
+
+for.body: ; preds = %for.body, %entry
+ %i.05 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %conv = trunc i64 %i.05 to i32
+ %mul = shl nsw i64 %i.05, 1
+ %sub = sub i64 %mul, %n2
+ %arrayidx = getelementptr inbounds i32* %A, i64 %sub
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.05, 1
+ %cmp = icmp ult i64 %inc, %n1
+ br i1 %cmp, label %for.body, label %for.cond1.preheader
+
+for.body4: ; preds = %for.body4, %for.cond1.preheader
+ %j.03 = phi i64 [ %inc9, %for.body4 ], [ 0, %for.cond1.preheader ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.cond1.preheader ]
+ %mul6 = shl i64 %n1, 1
+ %add = sub i64 %mul6, %j.03
+ %arrayidx7 = getelementptr inbounds i32* %A, i64 %add
+ %0 = load i32* %arrayidx7, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc9 = add nsw i64 %j.03, 1
+ %cmp2 = icmp ult i64 %inc9, %n2
+ br i1 %cmp2, label %for.body4, label %for.end10
+
+for.end10: ; preds = %for.body4, %for.cond1.preheader
+ ret void
+}
+
+
+;; for (long int i = 0; i < n1; i++)
+;; A[-i + n2] = ...
+;; for (long int j = 0; j < n2; j++)
+;; ... = A[j - n1];
+
+define void @symbolicrdiv3(i32* %A, i32* %B, i64 %n1, i64 %n2) nounwind uwtable ssp {
+entry:
+ %cmp4 = icmp eq i64 %n1, 0
+ br i1 %cmp4, label %for.cond1.preheader, label %for.body
+
+for.cond1.preheader: ; preds = %for.body, %entry
+ %cmp21 = icmp eq i64 %n2, 0
+ br i1 %cmp21, label %for.end9, label %for.body4
+
+for.body: ; preds = %for.body, %entry
+ %i.05 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %conv = trunc i64 %i.05 to i32
+ %add = sub i64 %n2, %i.05
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.05, 1
+ %cmp = icmp ult i64 %inc, %n1
+ br i1 %cmp, label %for.body, label %for.cond1.preheader
+
+for.body4: ; preds = %for.body4, %for.cond1.preheader
+ %j.03 = phi i64 [ %inc8, %for.body4 ], [ 0, %for.cond1.preheader ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.cond1.preheader ]
+ %sub5 = sub i64 %j.03, %n1
+ %arrayidx6 = getelementptr inbounds i32* %A, i64 %sub5
+ %0 = load i32* %arrayidx6, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc8 = add nsw i64 %j.03, 1
+ %cmp2 = icmp ult i64 %inc8, %n2
+ br i1 %cmp2, label %for.body4, label %for.end9
+
+for.end9: ; preds = %for.body4, %for.cond1.preheader
+ ret void
+}
+
+
+;; for (long int i = 0; i < n1; i++)
+;; A[-i + 2*n1] = ...
+;; for (long int j = 0; j < n2; j++)
+;; ... = A[-j + n1];
+
+define void @symbolicrdiv4(i32* %A, i32* %B, i64 %n1, i64 %n2) nounwind uwtable ssp {
+entry:
+ %cmp4 = icmp eq i64 %n1, 0
+ br i1 %cmp4, label %for.cond1.preheader, label %for.body
+
+for.cond1.preheader: ; preds = %for.body, %entry
+ %cmp21 = icmp eq i64 %n2, 0
+ br i1 %cmp21, label %for.end10, label %for.body4
+
+for.body: ; preds = %for.body, %entry
+ %i.05 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %conv = trunc i64 %i.05 to i32
+ %mul = shl i64 %n1, 1
+ %add = sub i64 %mul, %i.05
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.05, 1
+ %cmp = icmp ult i64 %inc, %n1
+ br i1 %cmp, label %for.body, label %for.cond1.preheader
+
+for.body4: ; preds = %for.body4, %for.cond1.preheader
+ %j.03 = phi i64 [ %inc9, %for.body4 ], [ 0, %for.cond1.preheader ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.cond1.preheader ]
+ %add6 = sub i64 %n1, %j.03
+ %arrayidx7 = getelementptr inbounds i32* %A, i64 %add6
+ %0 = load i32* %arrayidx7, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc9 = add nsw i64 %j.03, 1
+ %cmp2 = icmp ult i64 %inc9, %n2
+ br i1 %cmp2, label %for.body4, label %for.end10
+
+for.end10: ; preds = %for.body4, %for.cond1.preheader
+ ret void
+}
+
+
+;; for (long int i = 0; i < n1; i++)
+;; A[-i + n2] = ...
+;; for (long int j = 0; j < n2; j++)
+;; ... = A[-j + 2*n2];
+
+define void @symbolicrdiv5(i32* %A, i32* %B, i64 %n1, i64 %n2) nounwind uwtable ssp {
+entry:
+ %cmp4 = icmp eq i64 %n1, 0
+ br i1 %cmp4, label %for.cond1.preheader, label %for.body
+
+for.cond1.preheader: ; preds = %for.body, %entry
+ %cmp21 = icmp eq i64 %n2, 0
+ br i1 %cmp21, label %for.end10, label %for.body4
+
+for.body: ; preds = %for.body, %entry
+ %i.05 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %conv = trunc i64 %i.05 to i32
+ %add = sub i64 %n2, %i.05
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %inc = add nsw i64 %i.05, 1
+ %cmp = icmp ult i64 %inc, %n1
+ br i1 %cmp, label %for.body, label %for.cond1.preheader
+
+for.body4: ; preds = %for.body4, %for.cond1.preheader
+ %j.03 = phi i64 [ %inc9, %for.body4 ], [ 0, %for.cond1.preheader ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body4 ], [ %B, %for.cond1.preheader ]
+ %mul = shl i64 %n2, 1
+ %add6 = sub i64 %mul, %j.03
+ %arrayidx7 = getelementptr inbounds i32* %A, i64 %add6
+ %0 = load i32* %arrayidx7, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc9 = add nsw i64 %j.03, 1
+ %cmp2 = icmp ult i64 %inc9, %n2
+ br i1 %cmp2, label %for.body4, label %for.end10
+
+for.end10: ; preds = %for.body4, %for.cond1.preheader
+ ret void
+}
+
+
+;; for (long int i = 0; i < n1; i++)
+;; for (long int j = 0; j < n2; j++)
+;; A[j -i + n2] = ...
+;; ... = A[2*n2];
+
+define void @symbolicrdiv6(i32* %A, i32* %B, i64 %n1, i64 %n2) nounwind uwtable ssp {
+entry:
+ %cmp4 = icmp eq i64 %n1, 0
+ br i1 %cmp4, label %for.end7, label %for.cond1.preheader
+
+for.cond1.preheader: ; preds = %for.inc5, %entry
+ %B.addr.06 = phi i32* [ %B.addr.1.lcssa, %for.inc5 ], [ %B, %entry ]
+ %i.05 = phi i64 [ %inc6, %for.inc5 ], [ 0, %entry ]
+ %cmp21 = icmp eq i64 %n2, 0
+ br i1 %cmp21, label %for.inc5, label %for.body3
+
+for.body3: ; preds = %for.body3, %for.cond1.preheader
+ %j.03 = phi i64 [ %inc, %for.body3 ], [ 0, %for.cond1.preheader ]
+ %B.addr.12 = phi i32* [ %incdec.ptr, %for.body3 ], [ %B.addr.06, %for.cond1.preheader ]
+ %conv = trunc i64 %i.05 to i32
+ %sub = sub nsw i64 %j.03, %i.05
+ %add = add i64 %sub, %n2
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul = shl i64 %n2, 1
+ %arrayidx4 = getelementptr inbounds i32* %A, i64 %mul
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.12, i64 1
+ store i32 %0, i32* %B.addr.12, align 4
+ %inc = add nsw i64 %j.03, 1
+ %cmp2 = icmp ult i64 %inc, %n2
+ br i1 %cmp2, label %for.body3, label %for.inc5
+
+for.inc5: ; preds = %for.body3, %for.cond1.preheader
+ %B.addr.1.lcssa = phi i32* [ %B.addr.06, %for.cond1.preheader ], [ %incdec.ptr, %for.body3 ]
+ %inc6 = add nsw i64 %i.05, 1
+ %cmp = icmp ult i64 %inc6, %n1
+ br i1 %cmp, label %for.cond1.preheader, label %for.end7
+
+for.end7: ; preds = %for.inc5, %entry
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/SymbolicSIV.ll b/llvm/test/Analysis/DependenceAnalysis/SymbolicSIV.ll
new file mode 100644
index 0000000..ee2343f
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/SymbolicSIV.ll
@@ -0,0 +1,330 @@
+; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
+
+; ModuleID = 'SymbolicSIV.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; for (long int i = 0; i < n; i++)
+;; A[2*i + n] = ...
+;; ... = A[3*i + 3*n];
+
+define void @symbolicsiv0(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl nsw i64 %i.03, 1
+ %add = add i64 %mul, %n
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul14 = add i64 %i.03, %n
+ %add3 = mul i64 %mul14, 3
+ %arrayidx4 = getelementptr inbounds i32* %A, i64 %add3
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (long int i = 0; i < n; i++)
+;; A[2*i + 5*n] = ...
+;; ... = A[3*i + 2*n];
+
+define void @symbolicsiv1(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl nsw i64 %i.03, 1
+ %mul1 = mul i64 %n, 5
+ %add = add i64 %mul, %mul1
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul2 = mul nsw i64 %i.03, 3
+ %mul3 = shl i64 %n, 1
+ %add4 = add i64 %mul2, %mul3
+ %arrayidx5 = getelementptr inbounds i32* %A, i64 %add4
+ %0 = load i32* %arrayidx5, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (long int i = 0; i < n; i++)
+;; A[2*i - n] = ...
+;; ... = A[-i + 2*n];
+
+define void @symbolicsiv2(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl nsw i64 %i.03, 1
+ %sub = sub i64 %mul, %n
+ %arrayidx = getelementptr inbounds i32* %A, i64 %sub
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul2 = shl i64 %n, 1
+ %add = sub i64 %mul2, %i.03
+ %arrayidx3 = getelementptr inbounds i32* %A, i64 %add
+ %0 = load i32* %arrayidx3, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (long int i = 0; i < n; i++)
+;; A[-2*i + n + 1] = ...
+;; ... = A[i - 2*n];
+
+define void @symbolicsiv3(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, -2
+ %add = add i64 %mul, %n
+ %add1 = add i64 %add, 1
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add1
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul2 = shl i64 %n, 1
+ %sub = sub i64 %i.03, %mul2
+ %arrayidx3 = getelementptr inbounds i32* %A, i64 %sub
+ %0 = load i32* %arrayidx3, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (long int i = 0; i < n; i++)
+;; A[-2*i + 3*n] = ...
+;; ... = A[-i + n];
+
+define void @symbolicsiv4(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, -2
+ %mul1 = mul i64 %n, 3
+ %add = add i64 %mul, %mul1
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %add2 = sub i64 %n, %i.03
+ %arrayidx3 = getelementptr inbounds i32* %A, i64 %add2
+ %0 = load i32* %arrayidx3, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (long int i = 0; i < n; i++)
+;; A[-2*i - 2*n] = ...
+;; ... = A[-i - n];
+
+define void @symbolicsiv5(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul nsw i64 %i.03, -2
+ %mul1 = shl i64 %n, 1
+ %sub = sub i64 %mul, %mul1
+ %arrayidx = getelementptr inbounds i32* %A, i64 %sub
+ store i32 %conv, i32* %arrayidx, align 4
+ %sub2 = sub nsw i64 0, %i.03
+ %sub3 = sub i64 %sub2, %n
+ %arrayidx4 = getelementptr inbounds i32* %A, i64 %sub3
+ %0 = load i32* %arrayidx4, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add nsw i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; why doesn't SCEV package understand that n >= 0?
+;;void weaktest(int *A, int *B, long unsigned n)
+;; for (long unsigned i = 0; i < n; i++)
+;; A[i + n + 1] = ...
+;; ... = A[-i];
+
+define void @weaktest(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %add = add i64 %i.03, %n
+ %add1 = add i64 %add, 1
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add1
+ store i32 %conv, i32* %arrayidx, align 4
+ %sub = sub i64 0, %i.03
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %sub
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - flow [*|<] splitable!
+; CHECK: da analyze - split level = 1, iteration = ((0 smax (-1 + (-1 * %n))) /u 2)!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; void symbolicsiv6(int *A, int *B, long unsigned n, long unsigned N, long unsigned M) {
+;; for (long int i = 0; i < n; i++) {
+;; A[4*N*i + M] = i;
+;; *B++ = A[4*N*i + 3*M + 1];
+
+define void @symbolicsiv6(i32* %A, i32* %B, i64 %n, i64 %N, i64 %M) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body.preheader
+
+for.body.preheader: ; preds = %entry
+ br label %for.body
+
+for.body: ; preds = %for.body.preheader, %for.body
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %for.body.preheader ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %for.body.preheader ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl i64 %N, 2
+ %mul1 = mul i64 %mul, %i.03
+ %add = add i64 %mul1, %M
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul2 = shl i64 %N, 2
+ %mul3 = mul i64 %mul2, %i.03
+ %mul4 = mul i64 %M, 3
+ %add5 = add i64 %mul3, %mul4
+ %add6 = add i64 %add5, 1
+ %arrayidx7 = getelementptr inbounds i32* %A, i64 %add6
+ %0 = load i32* %arrayidx7, align 4
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+; CHECK: da analyze - none!
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add nsw i64 %i.03, 1
+ %exitcond = icmp ne i64 %inc, %n
+ br i1 %exitcond, label %for.body, label %for.end.loopexit
+
+for.end.loopexit: ; preds = %for.body
+ br label %for.end
+
+for.end: ; preds = %for.end.loopexit, %entry
+ ret void
+}
+
+
+;; void symbolicsiv7(int *A, int *B, long unsigned n, long unsigned N, long unsigned M) {
+;; for (long int i = 0; i < n; i++) {
+;; A[2*N*i + M] = i;
+;; *B++ = A[2*N*i - 3*M + 2];
+
+define void @symbolicsiv7(i32* %A, i32* %B, i64 %n, i64 %N, i64 %M) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body.preheader
+
+for.body.preheader: ; preds = %entry
+ br label %for.body
+
+for.body: ; preds = %for.body.preheader, %for.body
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %for.body.preheader ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %for.body.preheader ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = shl i64 %N, 1
+ %mul1 = mul i64 %mul, %i.03
+ %add = add i64 %mul1, %M
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul2 = shl i64 %N, 1
+ %mul3 = mul i64 %mul2, %i.03
+ %0 = mul i64 %M, -3
+ %sub = add i64 %mul3, %0
+ %add5 = add i64 %sub, 2
+ %arrayidx6 = getelementptr inbounds i32* %A, i64 %add5
+ %1 = load i32* %arrayidx6, align 4
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+; CHECK: da analyze - flow [<>]!
+ store i32 %1, i32* %B.addr.02, align 4
+ %inc = add nsw i64 %i.03, 1
+ %exitcond = icmp ne i64 %inc, %n
+ br i1 %exitcond, label %for.body, label %for.end.loopexit
+
+for.end.loopexit: ; preds = %for.body
+ br label %for.end
+
+for.end: ; preds = %for.end.loopexit, %entry
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/WeakCrossingSIV.ll b/llvm/test/Analysis/DependenceAnalysis/WeakCrossingSIV.ll
new file mode 100644
index 0000000..343e8f4
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/WeakCrossingSIV.ll
@@ -0,0 +1,220 @@
+; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
+
+; ModuleID = 'WeakCrossingSIV.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; for (long unsigned i = 0; i < n; i++)
+;; A[1 + n*i] = ...
+;; ... = A[1 - n*i];
+
+define void @weakcrossing0(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul i64 %i.03, %n
+ %add = add i64 %mul, 1
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul1 = mul i64 %i.03, %n
+ %sub = sub i64 1, %mul1
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %sub
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - flow [0|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < n; i++)
+;; A[n + i] = ...
+;; ... = A[1 + n - i];
+
+define void @weakcrossing1(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %add = add i64 %i.03, %n
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %add1 = add i64 %n, 1
+ %sub = sub i64 %add1, %i.03
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %sub
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - flow [<>] splitable!
+; CHECK: da analyze - split level = 1, iteration = 0!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 3; i++)
+;; A[i] = ...
+;; ... = A[6 - i];
+
+define void @weakcrossing2(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %arrayidx = getelementptr inbounds i32* %A, i64 %i.02
+ store i32 %conv, i32* %arrayidx, align 4
+ %sub = sub i64 6, %i.02
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %sub
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 3
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 4; i++)
+;; A[i] = ...
+;; ... = A[6 - i];
+
+define void @weakcrossing3(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %arrayidx = getelementptr inbounds i32* %A, i64 %i.02
+ store i32 %conv, i32* %arrayidx, align 4
+ %sub = sub i64 6, %i.02
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %sub
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [0|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 4
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 10; i++)
+;; A[i] = ...
+;; ... = A[-6 - i];
+
+define void @weakcrossing4(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %arrayidx = getelementptr inbounds i32* %A, i64 %i.02
+ store i32 %conv, i32* %arrayidx, align 4
+ %sub = sub i64 -6, %i.02
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %sub
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 10
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < n; i++)
+;; A[3*i] = ...
+;; ... = A[5 - 3*i];
+
+define void @weakcrossing5(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul i64 %i.03, 3
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %0 = mul i64 %i.03, -3
+ %sub = add i64 %0, 5
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %sub
+ %1 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %1, i32* %B.addr.02, align 4
+ %inc = add i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 4; i++)
+;; A[i] = ...
+;; ... = A[5 - i];
+
+define void @weakcrossing6(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %arrayidx = getelementptr inbounds i32* %A, i64 %i.02
+ store i32 %conv, i32* %arrayidx, align 4
+ %sub = sub i64 5, %i.02
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %sub
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [<>] splitable!
+; CHECK: da analyze - split level = 1, iteration = 2!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 4
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/WeakZeroDstSIV.ll b/llvm/test/Analysis/DependenceAnalysis/WeakZeroDstSIV.ll
new file mode 100644
index 0000000..a598716
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/WeakZeroDstSIV.ll
@@ -0,0 +1,212 @@
+; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
+
+; ModuleID = 'WeakZeroDstSIV.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; for (long unsigned i = 0; i < 30; i++)
+;; A[2*i + 10] = ...
+;; ... = A[10];
+
+define void @weakzerodst0(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = shl i64 %i.02, 1
+ %add = add i64 %mul, 10
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 10
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [p<=|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 30
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < n; i++)
+;; A[n*i + 10] = ...
+;; ... = A[10];
+
+define void @weakzerodst1(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul i64 %i.03, %n
+ %add = add i64 %mul, 10
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 10
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [p<=|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 5; i++)
+;; A[2*i] = ...
+;; ... = A[10];
+
+define void @weakzerodst2(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = shl i64 %i.02, 1
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 10
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 5
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 6; i++)
+;; A[2*i] = ...
+;; ... = A[10];
+
+define void @weakzerodst3(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = shl i64 %i.02, 1
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 10
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [=>p|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 6
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 7; i++)
+;; A[2*i] = ...
+;; ... = A[10];
+
+define void @weakzerodst4(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = shl i64 %i.02, 1
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 10
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [*|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 7
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 7; i++)
+;; A[2*i] = ...
+;; ... = A[-10];
+
+define void @weakzerodst5(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %mul = shl i64 %i.02, 1
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 -10
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 7
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < n; i++)
+;; A[3*i] = ...
+;; ... = A[10];
+
+define void @weakzerodst6(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %mul = mul i64 %i.03, 3
+ %arrayidx = getelementptr inbounds i32* %A, i64 %mul
+ store i32 %conv, i32* %arrayidx, align 4
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 10
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/WeakZeroSrcSIV.ll b/llvm/test/Analysis/DependenceAnalysis/WeakZeroSrcSIV.ll
new file mode 100644
index 0000000..fd4f462
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/WeakZeroSrcSIV.ll
@@ -0,0 +1,212 @@
+; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
+
+; ModuleID = 'WeakZeroSrcSIV.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; for (long unsigned i = 0; i < 30; i++)
+;; A[10] = ...
+;; ... = A[2*i + 10];
+
+define void @weakzerosrc0(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %arrayidx = getelementptr inbounds i32* %A, i64 10
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul = shl i64 %i.02, 1
+ %add = add i64 %mul, 10
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %add
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [p<=|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 30
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < n; i++)
+;; A[10] = ...
+;; ... = A[n*i + 10];
+
+define void @weakzerosrc1(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %arrayidx = getelementptr inbounds i32* %A, i64 10
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul = mul i64 %i.03, %n
+ %add = add i64 %mul, 10
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %add
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [p<=|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 5; i++)
+;; A[10] = ...
+;; ... = A[2*i];
+
+define void @weakzerosrc2(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %arrayidx = getelementptr inbounds i32* %A, i64 10
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul = shl i64 %i.02, 1
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %mul
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 5
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 6; i++)
+;; A[10] = ...
+;; ... = A[2*i];
+
+define void @weakzerosrc3(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %arrayidx = getelementptr inbounds i32* %A, i64 10
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul = shl i64 %i.02, 1
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %mul
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [=>p|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 6
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 7; i++)
+;; A[10] = ...
+;; ... = A[2*i];
+
+define void @weakzerosrc4(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %arrayidx = getelementptr inbounds i32* %A, i64 10
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul = shl i64 %i.02, 1
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %mul
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow [*|<]!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 7
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < 7; i++)
+;; A[-10] = ...
+;; ... = A[2*i];
+
+define void @weakzerosrc5(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ br label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.02 = phi i64 [ 0, %entry ], [ %inc, %for.body ]
+ %B.addr.01 = phi i32* [ %B, %entry ], [ %incdec.ptr, %for.body ]
+ %conv = trunc i64 %i.02 to i32
+ %arrayidx = getelementptr inbounds i32* %A, i64 -10
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul = shl i64 %i.02, 1
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %mul
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.01, i64 1
+ store i32 %0, i32* %B.addr.01, align 4
+ %inc = add i64 %i.02, 1
+ %cmp = icmp ult i64 %inc, 7
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+
+;; for (long unsigned i = 0; i < n; i++)
+;; A[10] = ...
+;; ... = A[3*i];
+
+define void @weakzerosrc6(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %cmp1 = icmp eq i64 %n, 0
+ br i1 %cmp1, label %for.end, label %for.body
+
+for.body: ; preds = %for.body, %entry
+ %i.03 = phi i64 [ %inc, %for.body ], [ 0, %entry ]
+ %B.addr.02 = phi i32* [ %incdec.ptr, %for.body ], [ %B, %entry ]
+ %conv = trunc i64 %i.03 to i32
+ %arrayidx = getelementptr inbounds i32* %A, i64 10
+ store i32 %conv, i32* %arrayidx, align 4
+ %mul = mul i64 %i.03, 3
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %mul
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - none!
+ %incdec.ptr = getelementptr inbounds i32* %B.addr.02, i64 1
+ store i32 %0, i32* %B.addr.02, align 4
+ %inc = add i64 %i.03, 1
+ %cmp = icmp ult i64 %inc, %n
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body, %entry
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/ZIV.ll b/llvm/test/Analysis/DependenceAnalysis/ZIV.ll
new file mode 100644
index 0000000..42b2389
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/ZIV.ll
@@ -0,0 +1,53 @@
+; RUN: opt < %s -analyze -basicaa -da | FileCheck %s
+
+; ModuleID = 'ZIV.bc'
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.6.0"
+
+
+;; A[n + 1] = ...
+;; ... = A[1 + n];
+
+define void @z0(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %add = add i64 %n, 1
+ %arrayidx = getelementptr inbounds i32* %A, i64 %add
+ store i32 0, i32* %arrayidx, align 4
+ %add1 = add i64 %n, 1
+ %arrayidx2 = getelementptr inbounds i32* %A, i64 %add1
+ %0 = load i32* %arrayidx2, align 4
+; CHECK: da analyze - consistent flow!
+ store i32 %0, i32* %B, align 4
+ ret void
+}
+
+
+;; A[n] = ...
+;; ... = A[n + 1];
+
+define void @z1(i32* %A, i32* %B, i64 %n) nounwind uwtable ssp {
+entry:
+ %arrayidx = getelementptr inbounds i32* %A, i64 %n
+ store i32 0, i32* %arrayidx, align 4
+ %add = add i64 %n, 1
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %add
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - none!
+ store i32 %0, i32* %B, align 4
+ ret void
+}
+
+
+;; A[n] = ...
+;; ... = A[m];
+
+define void @z2(i32* %A, i32* %B, i64 %n, i64 %m) nounwind uwtable ssp {
+entry:
+ %arrayidx = getelementptr inbounds i32* %A, i64 %n
+ store i32 0, i32* %arrayidx, align 4
+ %arrayidx1 = getelementptr inbounds i32* %A, i64 %m
+ %0 = load i32* %arrayidx1, align 4
+; CHECK: da analyze - flow!
+ store i32 %0, i32* %B, align 4
+ ret void
+}
diff --git a/llvm/test/Analysis/DependenceAnalysis/lit.local.cfg b/llvm/test/Analysis/DependenceAnalysis/lit.local.cfg
new file mode 100644
index 0000000..c6106e4
--- /dev/null
+++ b/llvm/test/Analysis/DependenceAnalysis/lit.local.cfg
@@ -0,0 +1 @@
+config.suffixes = ['.ll']