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| author | Evan Cheng <evan.cheng@apple.com> | 2011-05-19 18:57:12 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2011-05-19 18:57:12 +0000 |
| commit | 0efaa5e6a184cd6658aebc9873462ee60262a6bd (patch) | |
| tree | 3f3be9d9ea1c39b1ebd595fa222ebabe0e3105e0 /test/CodeGen/X86 | |
| parent | 3dfc4b12229acafee5c69c5ee1673b08027f0438 (diff) | |
| download | external_llvm-0efaa5e6a184cd6658aebc9873462ee60262a6bd.zip external_llvm-0efaa5e6a184cd6658aebc9873462ee60262a6bd.tar.gz external_llvm-0efaa5e6a184cd6658aebc9873462ee60262a6bd.tar.bz2 | |
crc32 with 64-bit output zeros upper 32-bits. rdar://9467055
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131664 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86')
| -rw-r--r-- | test/CodeGen/X86/crc64.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/CodeGen/X86/crc64.ll b/test/CodeGen/X86/crc64.ll new file mode 100644 index 0000000..1e0aa0d --- /dev/null +++ b/test/CodeGen/X86/crc64.ll @@ -0,0 +1,19 @@ +; RUN: llc < %s -march=x86-64 -mattr=sse42 | FileCheck %s + +; crc32 with 64-bit destination zeros high 32-bit. +; rdar://9467055 + +define i64 @t() nounwind { +entry: +; CHECK: t: +; CHECK: crc32q +; CHECK-NOT: mov +; CHECK-NEXT: crc32q + %0 = tail call i64 @llvm.x86.sse42.crc64.64(i64 0, i64 4) nounwind + %1 = and i64 %0, 4294967295 + %2 = tail call i64 @llvm.x86.sse42.crc64.64(i64 %1, i64 4) nounwind + %3 = and i64 %2, 4294967295 + ret i64 %3 +} + +declare i64 @llvm.x86.sse42.crc64.64(i64, i64) nounwind readnone |