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31 lines
1.3 KiB
31 lines
1.3 KiB
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -O2 -S -enable-memcpyopt-memoryssa=0 | FileCheck %s
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; RUN: opt < %s -O2 -S -enable-memcpyopt-memoryssa=1 -verify-memoryssa | FileCheck %s
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; performCallSlotOptzn in MemCpy should not exchange the calls to
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; @llvm.lifetime.start and @llvm.memcpy.
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i1) #1
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
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declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
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define void @_ZN4CordC2EOS_(i8* nocapture dereferenceable(16) %arg1) {
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; CHECK-LABEL: @_ZN4CordC2EOS_(
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; CHECK-NEXT: bb:
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; CHECK-NEXT: [[TMP_SROA_3_0_ARG1_SROA_RAW_IDX:%.*]] = getelementptr inbounds i8, i8* [[ARG1:%.*]], i64 7
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; CHECK-NEXT: store i8 0, i8* [[TMP_SROA_3_0_ARG1_SROA_RAW_IDX]], align 1
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; CHECK-NEXT: ret void
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;
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bb:
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%tmp = alloca [8 x i8], align 8
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%tmp5 = bitcast [8 x i8]* %tmp to i8*
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call void @llvm.lifetime.start.p0i8(i64 16, i8* %tmp5)
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%tmp10 = getelementptr inbounds i8, i8* %tmp5, i64 7
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store i8 0, i8* %tmp10, align 1
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %arg1, i8* align 8 %tmp5, i64 16, i1 false)
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call void @llvm.lifetime.end.p0i8(i64 16, i8* %tmp5)
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ret void
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}
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attributes #1 = { argmemonly nounwind }
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