| ; RUN: opt -memcpyopt -instcombine -S %s | FileCheck %s |
| %Foo = type { [2048 x i64] } |
| |
| ; Make sure that all mempcy calls are converted to memset calls, or removed. |
| ; CHECK-LABEL: @baz( |
| ; CHECK-NOT: call void @llvm.memcpy |
| define void @baz() unnamed_addr #0 { |
| entry-block: |
| %x.sroa.0 = alloca [2048 x i64], align 8 |
| %tmp0 = alloca [2048 x i64], align 8 |
| %0 = bitcast [2048 x i64]* %tmp0 to i8* |
| %tmp2 = alloca %Foo, align 8 |
| %x.sroa.0.0..sroa_cast6 = bitcast [2048 x i64]* %x.sroa.0 to i8* |
| call void @llvm.lifetime.start.p0i8(i64 16384, i8* %x.sroa.0.0..sroa_cast6) |
| call void @llvm.lifetime.start.p0i8(i64 16384, i8* %0) |
| call void @llvm.memset.p0i8.i64(i8* align 8 %0, i8 0, i64 16384, i1 false) |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %x.sroa.0.0..sroa_cast6, i8* align 8 %0, i64 16384, i1 false) |
| call void @llvm.lifetime.end.p0i8(i64 16384, i8* %0) |
| %1 = bitcast %Foo* %tmp2 to i8* |
| call void @llvm.lifetime.start.p0i8(i64 16384, i8* %1) |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %1, i8* align 8 %x.sroa.0.0..sroa_cast6, i64 16384, i1 false) |
| call void @bar(%Foo* noalias nocapture nonnull dereferenceable(16384) %tmp2) |
| call void @llvm.lifetime.end.p0i8(i64 16384, i8* %1) |
| call void @llvm.lifetime.end.p0i8(i64 16384, i8* %x.sroa.0.0..sroa_cast6) |
| ret void |
| } |
| |
| declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1 |
| |
| declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i1) #1 |
| |
| declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1 |
| |
| declare void @bar(%Foo* noalias nocapture readonly dereferenceable(16384)) unnamed_addr #0 |
| |
| declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1) #1 |
| |
| attributes #0 = { uwtable } |
| attributes #1 = { argmemonly nounwind } |
