diff options
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 0000000..878b97d --- /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.crc32.64.64 +; CHECK-NOT: and +; CHECK: ret + %0 = tail call i64 @llvm.x86.sse42.crc32.64.64(i64 0, i64 4) nounwind + %1 = and i64 %0, 4294967295 + ret i64 %1 +} + +declare i64 @llvm.x86.sse42.crc32.64.64(i64, i64) nounwind readnone |
