Add loop index split tests.
llvm-svn: 41146
diff --git a/llvm/test/Transforms/LoopIndexSplit/OneIterLoop-2007-08-17.ll b/llvm/test/Transforms/LoopIndexSplit/OneIterLoop-2007-08-17.ll
new file mode 100644
index 0000000..fb2cbad
--- /dev/null
+++ b/llvm/test/Transforms/LoopIndexSplit/OneIterLoop-2007-08-17.ll
@@ -0,0 +1,61 @@
+; Loop is elimianted
+; RUN: llvm-as < %s | opt -loop-index-split -disable-output -stats |& \
+; RUN: grep "loop-index-split" | count 1
+ %struct.anon = type { i32 }
+@S1 = external global i32 ; <i32*> [#uses=1]
+@W1 = external global i32 ; <i32*> [#uses=1]
+@Y = weak global [100 x %struct.anon] zeroinitializer, align 32 ; <[100 x %struct.anon]*> [#uses=1]
+@ti = external global i32 ; <i32*> [#uses=1]
+@T2 = external global [100 x [100 x i32]] ; <[100 x [100 x i32]]*> [#uses=1]
+@d = external global i32 ; <i32*> [#uses=1]
+@T1 = external global i32 ; <i32*> [#uses=2]
+@N2 = external global i32 ; <i32*> [#uses=2]
+
+define void @foo() {
+entry:
+ %tmp = load i32* @S1, align 4 ; <i32> [#uses=2]
+ %tmp266 = load i32* @N2, align 4 ; <i32> [#uses=1]
+ %tmp288 = icmp ult i32 %tmp, %tmp266 ; <i1> [#uses=1]
+ br i1 %tmp288, label %bb.preheader, label %return
+
+bb.preheader: ; preds = %entry
+ %tmp1 = load i32* @W1, align 4 ; <i32> [#uses=1]
+ %tmp13 = load i32* @ti, align 4 ; <i32> [#uses=1]
+ %tmp18 = load i32* @d, align 4 ; <i32> [#uses=1]
+ %tmp26 = load i32* @N2, align 4 ; <i32> [#uses=1]
+ %T1.promoted = load i32* @T1 ; <i32> [#uses=1]
+ br label %bb
+
+bb: ; preds = %bb.preheader, %bb25
+ %T1.tmp.1 = phi i32 [ %T1.promoted, %bb.preheader ], [ %T1.tmp.0, %bb25 ] ; <i32> [#uses=3]
+ %tj.01.0 = phi i32 [ %tmp24, %bb25 ], [ %tmp, %bb.preheader ] ; <i32> [#uses=4]
+ %tmp3 = icmp eq i32 %tj.01.0, %tmp1 ; <i1> [#uses=1]
+ br i1 %tmp3, label %cond_true, label %bb25
+
+cond_true: ; preds = %bb
+ %tmp7 = getelementptr [100 x %struct.anon]* @Y, i32 0, i32 %tj.01.0, i32 0 ; <i32*> [#uses=1]
+ %tmp8 = load i32* %tmp7, align 4 ; <i32> [#uses=1]
+ %tmp9 = icmp sgt i32 %tmp8, 0 ; <i1> [#uses=1]
+ br i1 %tmp9, label %cond_true12, label %bb25
+
+cond_true12: ; preds = %cond_true
+ %tmp16 = getelementptr [100 x [100 x i32]]* @T2, i32 0, i32 %tmp13, i32 %tj.01.0 ; <i32*> [#uses=1]
+ %tmp17 = load i32* %tmp16, align 4 ; <i32> [#uses=1]
+ %tmp19 = mul i32 %tmp18, %tmp17 ; <i32> [#uses=1]
+ %tmp21 = add i32 %tmp19, %T1.tmp.1 ; <i32> [#uses=1]
+ br label %bb25
+
+bb25: ; preds = %cond_true, %bb, %cond_true12
+ %T1.tmp.0 = phi i32 [ %T1.tmp.1, %bb ], [ %T1.tmp.1, %cond_true ], [ %tmp21, %cond_true12 ] ; <i32> [#uses=2]
+ %tmp24 = add i32 %tj.01.0, 1 ; <i32> [#uses=2]
+ %tmp28 = icmp ult i32 %tmp24, %tmp26 ; <i1> [#uses=1]
+ br i1 %tmp28, label %bb, label %return.loopexit
+
+return.loopexit: ; preds = %bb25
+ %T1.tmp.0.lcssa = phi i32 [ %T1.tmp.0, %bb25 ] ; <i32> [#uses=1]
+ store i32 %T1.tmp.0.lcssa, i32* @T1
+ br label %return
+
+return: ; preds = %return.loopexit, %entry
+ ret void
+}