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| author | Eli Friedman <eli.friedman@gmail.com> | 2011-12-07 00:11:56 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2011-12-07 00:11:56 +0000 |
| commit | 26323442d5b8373391d9899159974c1f38f6f4d5 (patch) | |
| tree | dadd53002f902a5ce850db7e7ffaded7f1161779 /test | |
| parent | c9040b3b1308bf84a26522040ba9b4d2fff59634 (diff) | |
| download | llvm-26323442d5b8373391d9899159974c1f38f6f4d5.tar.gz llvm-26323442d5b8373391d9899159974c1f38f6f4d5.tar.bz2 llvm-26323442d5b8373391d9899159974c1f38f6f4d5.tar.xz | |
Fix an optimization involving EXTRACT_SUBVECTOR in DAGCombine so it behaves correctly. PR11494.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145996 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/X86/2011-12-06-AVXVectorExtractCombine.ll | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2011-12-06-AVXVectorExtractCombine.ll b/test/CodeGen/X86/2011-12-06-AVXVectorExtractCombine.ll new file mode 100644 index 0000000000..fcaabddd2c --- /dev/null +++ b/test/CodeGen/X86/2011-12-06-AVXVectorExtractCombine.ll @@ -0,0 +1,18 @@ +; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7-avx -mattr=+avx | FileCheck %s +; PR11494 + +define void @test(<4 x i32>* nocapture %p) nounwind { + ; CHECK: test: + ; CHECK: vpxor %xmm0, %xmm0, %xmm0 + ; CHECK-NEXT: vpmaxsd {{.*}}, %xmm0, %xmm0 + ; CHECK-NEXT: vmovdqu %xmm0, (%rdi) + ; CHECK-NEXT: ret + %a = call <4 x i32> @llvm.x86.sse41.pmaxsd(<4 x i32> <i32 -8, i32 -9, i32 -10, i32 -11>, <4 x i32> zeroinitializer) nounwind + %b = shufflevector <4 x i32> %a, <4 x i32> undef, <8 x i32> <i32 undef, i32 undef, i32 undef, i32 undef, i32 0, i32 1, i32 2, i32 3> + %c = shufflevector <8 x i32> %b, <8 x i32> undef, <4 x i32> <i32 4, i32 5, i32 6, i32 7> + store <4 x i32> %c, <4 x i32>* %p, align 1 + ret void +} + +declare <4 x i32> @llvm.x86.sse41.pminsd(<4 x i32>, <4 x i32>) nounwind readnone +declare <4 x i32> @llvm.x86.sse41.pmaxsd(<4 x i32>, <4 x i32>) nounwind readnone |