1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -passes=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: call void @llvm.lifetime.start.p0(i64 16384, ptr nonnull [[TMP2]])
11 ; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16384) [[TMP2]], i8 0, i64 16384, i1 false)
12 ; CHECK-NEXT: call void @bar(ptr noalias nocapture nonnull dereferenceable(16384) [[TMP2]])
13 ; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 16384, ptr nonnull [[TMP2]])
14 ; CHECK-NEXT: ret void
17 %x.sroa.0 = alloca [2048 x i64], align 8
18 %tmp0 = alloca [2048 x i64], align 8
19 %tmp2 = alloca %Foo, align 8
20 call void @llvm.lifetime.start.p0(i64 16384, ptr %x.sroa.0)
21 call void @llvm.lifetime.start.p0(i64 16384, ptr %tmp0)
22 call void @llvm.memset.p0.i64(ptr align 8 %tmp0, i8 0, i64 16384, i1 false)
23 call void @llvm.memcpy.p0.p0.i64(ptr align 8 %x.sroa.0, ptr align 8 %tmp0, i64 16384, i1 false)
24 call void @llvm.lifetime.end.p0(i64 16384, ptr %tmp0)
25 call void @llvm.lifetime.start.p0(i64 16384, ptr %tmp2)
26 call void @llvm.memcpy.p0.p0.i64(ptr align 8 %tmp2, ptr align 8 %x.sroa.0, i64 16384, i1 false)
27 call void @bar(ptr noalias nocapture nonnull dereferenceable(16384) %tmp2)
28 call void @llvm.lifetime.end.p0(i64 16384, ptr %tmp2)
29 call void @llvm.lifetime.end.p0(i64 16384, ptr %x.sroa.0)
33 declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #1
35 declare void @llvm.memcpy.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1) #1
37 declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #1
39 declare void @bar(ptr noalias nocapture readonly dereferenceable(16384)) unnamed_addr #0
41 declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1) #1
43 attributes #0 = { uwtable }
44 attributes #1 = { argmemonly nounwind }