1 ; RUN: opt -memcpyopt -instcombine -S %s | FileCheck %s
2 %Foo = type { [2048 x i64] }
4 ; Make sure that all mempcy calls are converted to memset calls, or removed.
6 ; CHECK-NOT: call void @llvm.memcpy
7 define void @baz() unnamed_addr #0 {
9 %x.sroa.0 = alloca [2048 x i64], align 8
10 %tmp0 = alloca [2048 x i64], align 8
11 %0 = bitcast [2048 x i64]* %tmp0 to i8*
12 %tmp2 = alloca %Foo, align 8
13 %x.sroa.0.0..sroa_cast6 = bitcast [2048 x i64]* %x.sroa.0 to i8*
14 call void @llvm.lifetime.start.p0i8(i64 16384, i8* %x.sroa.0.0..sroa_cast6)
15 call void @llvm.lifetime.start.p0i8(i64 16384, i8* %0)
16 call void @llvm.memset.p0i8.i64(i8* align 8 %0, i8 0, i64 16384, i1 false)
17 call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %x.sroa.0.0..sroa_cast6, i8* align 8 %0, i64 16384, i1 false)
18 call void @llvm.lifetime.end.p0i8(i64 16384, i8* %0)
19 %1 = bitcast %Foo* %tmp2 to i8*
20 call void @llvm.lifetime.start.p0i8(i64 16384, i8* %1)
21 call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %1, i8* align 8 %x.sroa.0.0..sroa_cast6, i64 16384, i1 false)
22 call void @bar(%Foo* noalias nocapture nonnull dereferenceable(16384) %tmp2)
23 call void @llvm.lifetime.end.p0i8(i64 16384, i8* %1)
24 call void @llvm.lifetime.end.p0i8(i64 16384, i8* %x.sroa.0.0..sroa_cast6)
28 declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
30 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i1) #1
32 declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
34 declare void @bar(%Foo* noalias nocapture readonly dereferenceable(16384)) unnamed_addr #0
36 declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1) #1
38 attributes #0 = { uwtable }
39 attributes #1 = { argmemonly nounwind }