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| author | Evan Cheng <evan.cheng@apple.com> | 2011-05-20 00:54:37 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2011-05-20 00:54:37 +0000 |
| commit | 2e6496026f41d2c05ff038d14df9972f8a27fb94 (patch) | |
| tree | 3dde6780a871b0e1bba1d4d27f38e6937fea0298 /test/Transforms/InstCombine/x86-crc32-demanded.ll | |
| parent | 5a4b3d8c8f52ee225ffc65c7d6cebc78b1ec7808 (diff) | |
| download | llvm-2e6496026f41d2c05ff038d14df9972f8a27fb94.tar.gz llvm-2e6496026f41d2c05ff038d14df9972f8a27fb94.tar.bz2 llvm-2e6496026f41d2c05ff038d14df9972f8a27fb94.tar.xz | |
Revert r131664 and fix it in instcombine instead. rdar://9467055
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131708 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine/x86-crc32-demanded.ll')
| -rw-r--r-- | test/Transforms/InstCombine/x86-crc32-demanded.ll | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/x86-crc32-demanded.ll b/test/Transforms/InstCombine/x86-crc32-demanded.ll new file mode 100644 index 0000000000..be257ac4c7 --- /dev/null +++ b/test/Transforms/InstCombine/x86-crc32-demanded.ll @@ -0,0 +1,17 @@ +; RUN: opt < %s -instcombine -S | FileCheck %s + +; crc32 with 64-bit destination zeros high 32-bit. +; rdar://9467055 + +define i64 @test() nounwind { +entry: +; CHECK: test +; CHECK: tail call i64 @llvm.x86.sse42.crc64.64 +; CHECK-NOT: and +; CHECK: ret + %0 = tail call i64 @llvm.x86.sse42.crc64.64(i64 0, i64 4) nounwind + %1 = and i64 %0, 4294967295 + ret i64 %1 +} + +declare i64 @llvm.x86.sse42.crc64.64(i64, i64) nounwind readnone |