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| author | Shih-wei Liao <sliao@google.com> | 2010-02-10 11:10:31 -0800 |
|---|---|---|
| committer | Shih-wei Liao <sliao@google.com> | 2010-02-10 11:10:31 -0800 |
| commit | e264f62ca09a8f65c87a46d562a4d0f9ec5d457e (patch) | |
| tree | 59e3d57ef656cef79afa708ae0a3daf25cd91fcf /test/CodeGen/X86/2006-10-10-FindModifiedNodeSlotBug.ll | |
| download | external_llvm-e264f62ca09a8f65c87a46d562a4d0f9ec5d457e.zip external_llvm-e264f62ca09a8f65c87a46d562a4d0f9ec5d457e.tar.gz external_llvm-e264f62ca09a8f65c87a46d562a4d0f9ec5d457e.tar.bz2 | |
Check in LLVM r95781.
Diffstat (limited to 'test/CodeGen/X86/2006-10-10-FindModifiedNodeSlotBug.ll')
| -rw-r--r-- | test/CodeGen/X86/2006-10-10-FindModifiedNodeSlotBug.ll | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2006-10-10-FindModifiedNodeSlotBug.ll b/test/CodeGen/X86/2006-10-10-FindModifiedNodeSlotBug.ll new file mode 100644 index 0000000..b1f0451 --- /dev/null +++ b/test/CodeGen/X86/2006-10-10-FindModifiedNodeSlotBug.ll @@ -0,0 +1,28 @@ +; RUN: llc < %s -march=x86 | grep shrl +; Bug in FindModifiedNodeSlot cause tmp14 load to become a zextload and shr 31 +; is then optimized away. +@tree_code_type = external global [0 x i32] ; <[0 x i32]*> [#uses=1] + +define void @copy_if_shared_r() { + %tmp = load i32* null ; <i32> [#uses=1] + %tmp56 = and i32 %tmp, 255 ; <i32> [#uses=1] + %gep.upgrd.1 = zext i32 %tmp56 to i64 ; <i64> [#uses=1] + %tmp8 = getelementptr [0 x i32]* @tree_code_type, i32 0, i64 %gep.upgrd.1 ; <i32*> [#uses=1] + %tmp9 = load i32* %tmp8 ; <i32> [#uses=1] + %tmp10 = add i32 %tmp9, -1 ; <i32> [#uses=1] + %tmp.upgrd.2 = icmp ugt i32 %tmp10, 2 ; <i1> [#uses=1] + %tmp14 = load i32* null ; <i32> [#uses=1] + %tmp15 = lshr i32 %tmp14, 31 ; <i32> [#uses=1] + %tmp15.upgrd.3 = trunc i32 %tmp15 to i8 ; <i8> [#uses=1] + %tmp16 = icmp ne i8 %tmp15.upgrd.3, 0 ; <i1> [#uses=1] + br i1 %tmp.upgrd.2, label %cond_false25, label %cond_true +cond_true: ; preds = %0 + br i1 %tmp16, label %cond_true17, label %cond_false +cond_true17: ; preds = %cond_true + ret void +cond_false: ; preds = %cond_true + ret void +cond_false25: ; preds = %0 + ret void +} + |