| ; 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(i64 16384, 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 nocapture nonnull dereferenceable(16384) [[TMP2]]) |
| ; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 16384, 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(i64 16384, ptr %x.sroa.0) |
| call void @llvm.lifetime.start.p0(i64 16384, 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(i64 16384, ptr %tmp0) |
| call void @llvm.lifetime.start.p0(i64 16384, 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(i64 16384, ptr %tmp2) |
| call void @llvm.lifetime.end.p0(i64 16384, ptr %x.sroa.0) |
| ret void |
| } |
| |
| declare void @llvm.lifetime.start.p0(i64, 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(i64, 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 } |
