[LoopInterchange] Split up interchange.ll test case (NFC).
Summary:
Currently most tests for the loop interchange pass are in
test/Transforms/LoopInterchange/interchange.ll. This patch splits up the
large test file in smaller pieces, which makes debugging test failures
easier.
Reviewers: karthikthecool, blitz.opensource, hfinkel
Reviewed By: hfinkel
Subscribers: hfinkel, mcrosier, mkuper, mzolotukhin, mssimpso, llvm-commits
Differential Revision: https://reviews.llvm.org/D35488
llvm-svn: 308284
diff --git a/llvm/test/Transforms/LoopInterchange/not-interchanged-dependencies-1.ll b/llvm/test/Transforms/LoopInterchange/not-interchanged-dependencies-1.ll
new file mode 100644
index 0000000..cf4f83b
--- /dev/null
+++ b/llvm/test/Transforms/LoopInterchange/not-interchanged-dependencies-1.ll
@@ -0,0 +1,64 @@
+; RUN: opt < %s -basicaa -loop-interchange -S | FileCheck %s
+;; We test the complete .ll for adjustment in outer loop header/latch and inner loop header/latch.
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+@A = common global [100 x [100 x i32]] zeroinitializer
+@B = common global [100 x i32] zeroinitializer
+
+;; Loops should not be interchanged in this case as it is not legal due to dependency.
+;; for(int j=0;j<99;j++)
+;; for(int i=0;i<99;i++)
+;; A[j][i+1] = A[j+1][i]+k;
+
+define void @interchange_04(i32 %k){
+entry:
+ br label %for.cond1.preheader
+
+for.cond1.preheader:
+ %indvars.iv23 = phi i64 [ 0, %entry ], [ %indvars.iv.next24, %for.inc12 ]
+ %indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
+ br label %for.body3
+
+for.body3:
+ %indvars.iv = phi i64 [ 0, %for.cond1.preheader ], [ %indvars.iv.next, %for.body3 ]
+ %arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv.next24, i64 %indvars.iv
+ %0 = load i32, i32* %arrayidx5
+ %add6 = add nsw i32 %0, %k
+ %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+ %arrayidx11 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv23, i64 %indvars.iv.next
+ store i32 %add6, i32* %arrayidx11
+ %exitcond = icmp eq i64 %indvars.iv.next, 99
+ br i1 %exitcond, label %for.inc12, label %for.body3
+
+for.inc12:
+ %exitcond25 = icmp eq i64 %indvars.iv.next24, 99
+ br i1 %exitcond25, label %for.end14, label %for.cond1.preheader
+
+for.end14:
+ ret void
+}
+
+; CHECK-LABEL: @interchange_04
+; CHECK: entry:
+; CHECK: br label %for.cond1.preheader
+; CHECK: for.cond1.preheader: ; preds = %for.inc12, %entry
+; CHECK: %indvars.iv23 = phi i64 [ 0, %entry ], [ %indvars.iv.next24, %for.inc12 ]
+; CHECK: %indvars.iv.next24 = add nuw nsw i64 %indvars.iv23, 1
+; CHECK: br label %for.body3
+; CHECK: for.body3: ; preds = %for.body3, %for.cond1.preheader
+; CHECK: %indvars.iv = phi i64 [ 0, %for.cond1.preheader ], [ %indvars.iv.next, %for.body3 ]
+; CHECK: %arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv.next24, i64 %indvars.iv
+; CHECK: %0 = load i32, i32* %arrayidx5
+; CHECK: %add6 = add nsw i32 %0, %k
+; CHECK: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+; CHECK: %arrayidx11 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* @A, i64 0, i64 %indvars.iv23, i64 %indvars.iv.next
+; CHECK: store i32 %add6, i32* %arrayidx11
+; CHECK: %exitcond = icmp eq i64 %indvars.iv.next, 99
+; CHECK: br i1 %exitcond, label %for.inc12, label %for.body3
+; CHECK: for.inc12: ; preds = %for.body3
+; CHECK: %exitcond25 = icmp eq i64 %indvars.iv.next24, 99
+; CHECK: br i1 %exitcond25, label %for.end14, label %for.cond1.preheader
+; CHECK: for.end14: ; preds = %for.inc12
+; CHECK: ret void