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authorShih-wei Liao <sliao@google.com>2010-02-10 11:10:31 -0800
committerShih-wei Liao <sliao@google.com>2010-02-10 11:10:31 -0800
commite264f62ca09a8f65c87a46d562a4d0f9ec5d457e (patch)
tree59e3d57ef656cef79afa708ae0a3daf25cd91fcf /test/CodeGen/X86/loop-strength-reduce-3.ll
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Check in LLVM r95781.
Diffstat (limited to 'test/CodeGen/X86/loop-strength-reduce-3.ll')
-rw-r--r--test/CodeGen/X86/loop-strength-reduce-3.ll30
1 files changed, 30 insertions, 0 deletions
diff --git a/test/CodeGen/X86/loop-strength-reduce-3.ll b/test/CodeGen/X86/loop-strength-reduce-3.ll
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+++ b/test/CodeGen/X86/loop-strength-reduce-3.ll
@@ -0,0 +1,30 @@
+; RUN: llc < %s -mtriple=i386-apple-darwin -relocation-model=dynamic-no-pic | \
+; RUN: grep {A+} | count 2
+;
+; Make sure the common loop invariant A is not hoisted up to preheader,
+; since it can be subsumed it into the addressing modes.
+
+@A = global [16 x [16 x i32]] zeroinitializer, align 32 ; <[16 x [16 x i32]]*> [#uses=2]
+
+define void @test(i32 %row, i32 %N.in) nounwind {
+entry:
+ %N = bitcast i32 %N.in to i32 ; <i32> [#uses=1]
+ %tmp5 = icmp sgt i32 %N.in, 0 ; <i1> [#uses=1]
+ br i1 %tmp5, label %cond_true, label %return
+
+cond_true: ; preds = %cond_true, %entry
+ %indvar = phi i32 [ 0, %entry ], [ %indvar.next, %cond_true ] ; <i32> [#uses=2]
+ %i.0.0 = bitcast i32 %indvar to i32 ; <i32> [#uses=2]
+ %tmp2 = add i32 %i.0.0, 1 ; <i32> [#uses=1]
+ %tmp = getelementptr [16 x [16 x i32]]* @A, i32 0, i32 %row, i32 %tmp2 ; <i32*> [#uses=1]
+ store i32 4, i32* %tmp
+ %tmp5.upgrd.1 = add i32 %i.0.0, 2 ; <i32> [#uses=1]
+ %tmp7 = getelementptr [16 x [16 x i32]]* @A, i32 0, i32 %row, i32 %tmp5.upgrd.1 ; <i32*> [#uses=1]
+ store i32 5, i32* %tmp7
+ %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2]
+ %exitcond = icmp eq i32 %indvar.next, %N ; <i1> [#uses=1]
+ br i1 %exitcond, label %return, label %cond_true
+
+return: ; preds = %cond_true, %entry
+ ret void
+}