xref: /aosp_15_r20/external/llvm/test/Transforms/InstCombine/x86-crc32-demanded.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58) 
1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -instcombine -S | FileCheck %s
2*9880d681SAndroid Build Coastguard Worker
3*9880d681SAndroid Build Coastguard Worker; crc32 with 64-bit destination zeros high 32-bit.
4*9880d681SAndroid Build Coastguard Worker; rdar://9467055
5*9880d681SAndroid Build Coastguard Worker
6*9880d681SAndroid Build Coastguard Workerdefine i64 @test() nounwind {
7*9880d681SAndroid Build Coastguard Workerentry:
8*9880d681SAndroid Build Coastguard Worker; CHECK: test
9*9880d681SAndroid Build Coastguard Worker; CHECK: tail call i64 @llvm.x86.sse42.crc32.64.64
10*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: and
11*9880d681SAndroid Build Coastguard Worker; CHECK: ret
12*9880d681SAndroid Build Coastguard Worker  %0 = tail call i64 @llvm.x86.sse42.crc32.64.64(i64 0, i64 4) nounwind
13*9880d681SAndroid Build Coastguard Worker  %1 = and i64 %0, 4294967295
14*9880d681SAndroid Build Coastguard Worker  ret i64 %1
15*9880d681SAndroid Build Coastguard Worker}
16*9880d681SAndroid Build Coastguard Worker
17*9880d681SAndroid Build Coastguard Workerdeclare i64 @llvm.x86.sse42.crc32.64.64(i64, i64) nounwind readnone
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