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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt -S -passes=memcpyopt < %s | FileCheck %s3 4declare void @llvm.memset.p0.i64(ptr, i8, i64, i1)5declare void @llvm.memcpy.p0.p0.i64(ptr, ptr, i64, i1)6 7define void @zero_size(ptr %p, ptr %p2) {8; CHECK-LABEL: @zero_size(9; CHECK-NEXT: ret void10;11 call void @llvm.memcpy.p0.p0.i64(ptr %p, ptr %p2, i64 0, i1 false)12 ret void13}14 15; The memcpy size is zero in a way that is non-trivial, but understood by AA.16define void @pr54983(ptr %p, ptr noalias %p2) {17; CHECK-LABEL: @pr54983(18; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr [[P:%.*]], i8 0, i64 1, i1 false)19; CHECK-NEXT: [[SIZE:%.*]] = shl i64 0, 020; CHECK-NEXT: ret void21;22 call void @llvm.memset.p0.i64(ptr %p, i8 0, i64 1, i1 false)23 %size = shl i64 0, 024 call void @llvm.memcpy.p0.p0.i64(ptr %p, ptr %p2, i64 %size, i1 false)25 ret void26}27 28define void @pr64886(i64 %len, ptr noalias %p) {29; CHECK-LABEL: @pr64886(30; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr inttoptr (i64 -1 to ptr), i8 0, i64 [[LEN:%.*]], i1 false)31; CHECK-NEXT: ret void32;33 call void @llvm.memset.p0.i64(ptr inttoptr (i64 -1 to ptr), i8 0, i64 %len, i1 false)34 call void @llvm.memcpy.p0.p0.i64(ptr inttoptr (i64 -1 to ptr), ptr %p, i64 poison, i1 false)35 ret void36}37 38define void @pr98610(ptr %p, ptr noalias %p2) {39; CHECK-LABEL: @pr98610(40; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr [[P:%.*]], i8 0, i64 1, i1 false)41; CHECK-NEXT: [[ZERO_EXT:%.*]] = zext i32 0 to i6442; CHECK-NEXT: [[MUL:%.*]] = mul i64 [[ZERO_EXT]], 143; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr [[P]], ptr [[P2:%.*]], i64 [[MUL]], i1 false)44; CHECK-NEXT: ret void45;46 call void @llvm.memset.p0.i64(ptr %p, i8 0, i64 1, i1 false)47 %zero.ext = zext i32 0 to i6448 %mul = mul i64 %zero.ext, 149 call void @llvm.memcpy.p0.p0.i64(ptr %p, ptr %p2, i64 %mul, i1 false)50 ret void51}52