| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4 |
| ; RUN: opt < %s -passes=memcpyopt,instcombine -S -verify-memoryssa | FileCheck --check-prefix=CUSTOM %s |
| ; RUN: opt < %s -O2 -S | FileCheck --check-prefix=O2 %s |
| |
| ; Check that we eliminate all `memcpy` calls in this function. |
| define void @memcpy_forward_back_with_offset(ptr %arg) { |
| ; CUSTOM-LABEL: define void @memcpy_forward_back_with_offset( |
| ; CUSTOM-SAME: ptr [[ARG:%.*]]) { |
| ; CUSTOM-NEXT: store i8 1, ptr [[ARG]], align 1 |
| ; CUSTOM-NEXT: ret void |
| ; |
| ; O2-LABEL: define void @memcpy_forward_back_with_offset( |
| ; O2-SAME: ptr nocapture writeonly initializes((0, 1)) [[ARG:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] { |
| ; O2-NEXT: store i8 1, ptr [[ARG]], align 1 |
| ; O2-NEXT: ret void |
| ; |
| %i = alloca [753 x i8], align 1 |
| %i1 = alloca [754 x i8], align 1 |
| call void @llvm.memcpy.p0.p0.i64(ptr %i1, ptr %arg, i64 754, i1 false) |
| %i2 = getelementptr inbounds i8, ptr %i1, i64 1 |
| call void @llvm.memcpy.p0.p0.i64(ptr %i, ptr %i2, i64 753, i1 false) |
| store i8 1, ptr %arg, align 1 |
| %i3 = getelementptr inbounds i8, ptr %arg, i64 1 |
| call void @llvm.memcpy.p0.p0.i64(ptr %i3, ptr %i, i64 753, i1 false) |
| ret void |
| } |
| |
| declare void @llvm.memcpy.p0.p0.i64(ptr, ptr, i64, i1) |
