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author | Evan Cheng <evan.cheng@apple.com> | 2009-09-21 04:32:32 +0000 |
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committer | Evan Cheng <evan.cheng@apple.com> | 2009-09-21 04:32:32 +0000 |
commit | b0f5973bee566269f41d1cc21b7a1d3bede1d837 (patch) | |
tree | 66a3bdf56afb04183c366e8821b05ee9f61fb407 /test/CodeGen/ARM/2009-09-20-LiveIntervalsBug.ll | |
parent | cc1c702f628d93f9d84b681059e16652ad09d595 (diff) | |
download | external_llvm-b0f5973bee566269f41d1cc21b7a1d3bede1d837.zip external_llvm-b0f5973bee566269f41d1cc21b7a1d3bede1d837.tar.gz external_llvm-b0f5973bee566269f41d1cc21b7a1d3bede1d837.tar.bz2 |
Fix PR4986. "r1024 = insert_subreg r1024, undef, 2" cannot be turned in an implicit_def. Instead, it's an identity copy so it should be eliminated. Also make sure to update livevariable kill information.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82436 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/ARM/2009-09-20-LiveIntervalsBug.ll')
-rw-r--r-- | test/CodeGen/ARM/2009-09-20-LiveIntervalsBug.ll | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/2009-09-20-LiveIntervalsBug.ll b/test/CodeGen/ARM/2009-09-20-LiveIntervalsBug.ll new file mode 100644 index 0000000..980f8ce --- /dev/null +++ b/test/CodeGen/ARM/2009-09-20-LiveIntervalsBug.ll @@ -0,0 +1,34 @@ +; RUN: llc < %s -mtriple=arm-eabi -mattr=+neon -mcpu=cortex-a9 + +; PR4986 + +define arm_aapcs_vfpcc void @foo(i8* nocapture %pBuffer, i32 %numItems) nounwind { +entry: + br i1 undef, label %return, label %bb.preheader + +bb.preheader: ; preds = %entry + br label %bb + +bb: ; preds = %bb, %bb.preheader + %0 = shufflevector <4 x float> zeroinitializer, <4 x float> undef, <4 x i32> zeroinitializer ; <<4 x float>> [#uses=1] + %1 = insertelement <4 x float> %0, float undef, i32 1 ; <<4 x float>> [#uses=1] + %2 = insertelement <4 x float> %1, float undef, i32 2 ; <<4 x float>> [#uses=1] + %3 = insertelement <4 x float> %2, float undef, i32 3 ; <<4 x float>> [#uses=1] + %4 = fmul <4 x float> undef, %3 ; <<4 x float>> [#uses=1] + %5 = extractelement <4 x float> %4, i32 3 ; <float> [#uses=1] + store float %5, float* undef, align 4 + br i1 undef, label %return, label %bb + +return: ; preds = %bb, %entry + ret void +} + +define arm_aapcs_vfpcc <4 x float> @bar(i8* nocapture %pBuffer, i32 %numItems) nounwind { + %1 = shufflevector <4 x float> zeroinitializer, <4 x float> undef, <4 x i32> zeroinitializer ; <<4 x float>> [#uses=1] + %2 = insertelement <4 x float> %1, float undef, i32 1 ; <<4 x float>> [#uses=1] + %3 = insertelement <4 x float> %2, float undef, i32 2 ; <<4 x float>> [#uses=1] + %4 = insertelement <4 x float> %3, float undef, i32 3 ; <<4 x float>> [#uses=1] + %5 = shufflevector <4 x float> %4, <4 x float> undef, <2 x i32> <i32 0, i32 1> ; <<2 x float>> [#uses=1] + %6 = shufflevector <2 x float> %5, <2 x float> undef, <4 x i32> <i32 1, i32 1, i32 1, i32 1> ; <<4 x float>> [#uses=1] + ret <4 x float> %6 +} |