llvm/test/Transforms/MemCpyOpt/pr29105.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=memcpyopt,instcombine -S %s -verify-memoryssa | FileCheck %s
%Foo = type { [2048 x i64] }

; Make sure that all mempcy calls are converted to memset calls, or removed.
define void @baz() unnamed_addr #0 {
; CHECK-LABEL: @baz(
; CHECK-NEXT:  entry-block:
; CHECK-NEXT:    [[TMP2:%.*]] = alloca [[FOO:%.*]], align 8
; CHECK-NEXT:    call void @llvm.lifetime.start.p0(ptr nonnull [[TMP2]])
; CHECK-NEXT:    call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16384) [[TMP2]], i8 0, i64 16384, i1 false)
; CHECK-NEXT:    call void @bar(ptr noalias nonnull captures(none) dereferenceable(16384) [[TMP2]])
; CHECK-NEXT:    call void @llvm.lifetime.end.p0(ptr nonnull [[TMP2]])
; CHECK-NEXT:    ret void
;
entry-block:
  %x.sroa.0 = alloca [2048 x i64], align 8
  %tmp0 = alloca [2048 x i64], align 8
  %tmp2 = alloca %Foo, align 8
  call void @llvm.lifetime.start.p0(ptr %x.sroa.0)
  call void @llvm.lifetime.start.p0(ptr %tmp0)
  call void @llvm.memset.p0.i64(ptr align 8 %tmp0, i8 0, i64 16384, i1 false)
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %x.sroa.0, ptr align 8 %tmp0, i64 16384, i1 false)
  call void @llvm.lifetime.end.p0(ptr %tmp0)
  call void @llvm.lifetime.start.p0(ptr %tmp2)
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %tmp2, ptr align 8 %x.sroa.0, i64 16384, i1 false)
  call void @bar(ptr noalias nocapture nonnull dereferenceable(16384) %tmp2)
  call void @llvm.lifetime.end.p0(ptr %tmp2)
  call void @llvm.lifetime.end.p0(ptr %x.sroa.0)
  ret void
}

declare void @llvm.lifetime.start.p0(ptr nocapture) #1

declare void @llvm.memcpy.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1) #1

declare void @llvm.lifetime.end.p0(ptr nocapture) #1

declare void @bar(ptr noalias nocapture readonly dereferenceable(16384)) unnamed_addr #0

declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1) #1

attributes #0 = { uwtable }
attributes #1 = { argmemonly nounwind }