| Tim Shen | 7aa0ad6 | 2016-06-08 19:42:32 +0000 | [diff] [blame^] | 1 | ; RUN: opt < %s -O1 -S | FileCheck %s |
| 2 | |
| 3 | ; performCallSlotOptzn in MemCpy should not exchange the calls to |
| 4 | ; @llvm.lifetime.start and @llvm.memcpy. |
| 5 | |
| 6 | declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) #1 |
| 7 | declare void @llvm.lifetime.start(i64, i8* nocapture) #1 |
| 8 | declare void @llvm.lifetime.end(i64, i8* nocapture) #1 |
| 9 | |
| 10 | define void @_ZN4CordC2EOS_(i8* nocapture dereferenceable(16) %arg1) { |
| 11 | bb: |
| 12 | ; CHECK-LABEL: @_ZN4CordC2EOS_ |
| 13 | ; CHECK-NOT: call void @llvm.lifetime.start |
| 14 | ; CHECK: ret void |
| 15 | %tmp = alloca [8 x i8], align 8 |
| 16 | %tmp5 = bitcast [8 x i8]* %tmp to i8* |
| 17 | call void @llvm.lifetime.start(i64 16, i8* %tmp5) |
| 18 | %tmp10 = getelementptr inbounds i8, i8* %tmp5, i64 7 |
| 19 | store i8 0, i8* %tmp10, align 1 |
| 20 | call void @llvm.memcpy.p0i8.p0i8.i64(i8* %arg1, i8* %tmp5, i64 16, i32 8, i1 false) |
| 21 | call void @llvm.lifetime.end(i64 16, i8* %tmp5) |
| 22 | ret void |
| 23 | } |
| 24 | |
| 25 | attributes #1 = { argmemonly nounwind } |