1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -memcpyopt -instcombine -S %s -verify-memoryssa | FileCheck %s
3 %Foo = type { [2048 x i64] }
5 ; Make sure that all mempcy calls are converted to memset calls, or removed.
6 define void @baz() unnamed_addr #0 {
8 ; CHECK-NEXT: entry-block:
9 ; CHECK-NEXT: [[TMP2:%.*]] = alloca [[FOO:%.*]], align 8
10 ; CHECK-NEXT: [[TMP0:%.*]] = bitcast %Foo* [[TMP2]] to i8*
11 ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 16384, i8* nonnull [[TMP0]])
12 ; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* noundef nonnull align 8 dereferenceable(16384) [[TMP0]], i8 0, i64 16384, i1 false)
13 ; CHECK-NEXT: call void @bar(%Foo* noalias nocapture nonnull dereferenceable(16384) [[TMP2]])
14 ; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 16384, i8* nonnull [[TMP0]])
15 ; CHECK-NEXT: ret void
18 %x.sroa.0 = alloca [2048 x i64], align 8
19 %tmp0 = alloca [2048 x i64], align 8
20 %0 = bitcast [2048 x i64]* %tmp0 to i8*
21 %tmp2 = alloca %Foo, align 8
22 %x.sroa.0.0..sroa_cast6 = bitcast [2048 x i64]* %x.sroa.0 to i8*
23 call void @llvm.lifetime.start.p0i8(i64 16384, i8* %x.sroa.0.0..sroa_cast6)
24 call void @llvm.lifetime.start.p0i8(i64 16384, i8* %0)
25 call void @llvm.memset.p0i8.i64(i8* align 8 %0, i8 0, i64 16384, i1 false)
26 call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %x.sroa.0.0..sroa_cast6, i8* align 8 %0, i64 16384, i1 false)
27 call void @llvm.lifetime.end.p0i8(i64 16384, i8* %0)
28 %1 = bitcast %Foo* %tmp2 to i8*
29 call void @llvm.lifetime.start.p0i8(i64 16384, i8* %1)
30 call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %1, i8* align 8 %x.sroa.0.0..sroa_cast6, i64 16384, i1 false)
31 call void @bar(%Foo* noalias nocapture nonnull dereferenceable(16384) %tmp2)
32 call void @llvm.lifetime.end.p0i8(i64 16384, i8* %1)
33 call void @llvm.lifetime.end.p0i8(i64 16384, i8* %x.sroa.0.0..sroa_cast6)
37 declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
39 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i1) #1
41 declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
43 declare void @bar(%Foo* noalias nocapture readonly dereferenceable(16384)) unnamed_addr #0
45 declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1) #1
47 attributes #0 = { uwtable }
48 attributes #1 = { argmemonly nounwind }