Address issues found by Duncan during post-commit review of r177856.
[oota-llvm.git] / test / Transforms / InstCombine / x86-crc32-demanded.ll
1 ; RUN: opt < %s -instcombine -S | FileCheck %s
2
3 ; crc32 with 64-bit destination zeros high 32-bit.
4 ; rdar://9467055
5
6 define i64 @test() nounwind {
7 entry:
8 ; CHECK: test
9 ; CHECK: tail call i64 @llvm.x86.sse42.crc32.64.64
10 ; CHECK-NOT: and
11 ; CHECK: ret
12   %0 = tail call i64 @llvm.x86.sse42.crc32.64.64(i64 0, i64 4) nounwind
13   %1 = and i64 %0, 4294967295
14   ret i64 %1
15 }
16
17 declare i64 @llvm.x86.sse42.crc32.64.64(i64, i64) nounwind readnone