1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -O2 -S -enable-memcpyopt-memoryssa=0 | FileCheck %s 3; RUN: opt < %s -O2 -S -enable-memcpyopt-memoryssa=1 -verify-memoryssa | FileCheck %s 4 5; performCallSlotOptzn in MemCpy should not exchange the calls to 6; @llvm.lifetime.start and @llvm.memcpy. 7 8declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i1) #1 9declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1 10declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1 11 12define void @_ZN4CordC2EOS_(i8* nocapture dereferenceable(16) %arg1) { 13; CHECK-LABEL: @_ZN4CordC2EOS_( 14; CHECK-NEXT: bb: 15; CHECK-NEXT: [[TMP_SROA_3_0_ARG1_SROA_RAW_IDX:%.*]] = getelementptr inbounds i8, i8* [[ARG1:%.*]], i64 7 16; CHECK-NEXT: store i8 0, i8* [[TMP_SROA_3_0_ARG1_SROA_RAW_IDX]], align 1 17; CHECK-NEXT: ret void 18; 19bb: 20 %tmp = alloca [8 x i8], align 8 21 %tmp5 = bitcast [8 x i8]* %tmp to i8* 22 call void @llvm.lifetime.start.p0i8(i64 16, i8* %tmp5) 23 %tmp10 = getelementptr inbounds i8, i8* %tmp5, i64 7 24 store i8 0, i8* %tmp10, align 1 25 call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %arg1, i8* align 8 %tmp5, i64 16, i1 false) 26 call void @llvm.lifetime.end.p0i8(i64 16, i8* %tmp5) 27 ret void 28} 29 30attributes #1 = { argmemonly nounwind } 31