| ; RUN: opt < %s -O1 -S | FileCheck %s |
| |
| ; performCallSlotOptzn in MemCpy should not exchange the calls to |
| ; @llvm.lifetime.start and @llvm.memcpy. |
| |
| declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i1) #1 |
| declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1 |
| declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1 |
| |
| define void @_ZN4CordC2EOS_(i8* nocapture dereferenceable(16) %arg1) { |
| bb: |
| ; CHECK-LABEL: @_ZN4CordC2EOS_ |
| ; CHECK-NOT: call void @llvm.lifetime.start |
| ; CHECK: ret void |
| %tmp = alloca [8 x i8], align 8 |
| %tmp5 = bitcast [8 x i8]* %tmp to i8* |
| call void @llvm.lifetime.start.p0i8(i64 16, i8* %tmp5) |
| %tmp10 = getelementptr inbounds i8, i8* %tmp5, i64 7 |
| store i8 0, i8* %tmp10, align 1 |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %arg1, i8* align 8 %tmp5, i64 16, i1 false) |
| call void @llvm.lifetime.end.p0i8(i64 16, i8* %tmp5) |
| ret void |
| } |
| |
| attributes #1 = { argmemonly nounwind } |
