| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -O2 -S -verify-memoryssa | FileCheck %s |
| |
| ; performCallSlotOptzn in MemCpy should not exchange the calls to |
| ; @llvm.lifetime.start and @llvm.memcpy. |
| |
| declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i1) #1 |
| declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1 |
| declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1 |
| |
| define void @call_slot(i8* nocapture dereferenceable(16) %arg1) { |
| ; CHECK-LABEL: @call_slot( |
| ; CHECK-NEXT: bb: |
| ; CHECK-NEXT: [[TMP_SROA_3_0_ARG1_SROA_RAW_IDX:%.*]] = getelementptr inbounds i8, i8* [[ARG1:%.*]], i64 7 |
| ; CHECK-NEXT: store i8 0, i8* [[TMP_SROA_3_0_ARG1_SROA_RAW_IDX]], align 1 |
| ; CHECK-NEXT: ret void |
| ; |
| bb: |
| %tmp = alloca [8 x i8], align 8 |
| %tmp5 = bitcast [8 x i8]* %tmp to i8* |
| call void @llvm.lifetime.start.p0i8(i64 16, i8* %tmp5) |
| %tmp10 = getelementptr inbounds i8, i8* %tmp5, i64 7 |
| store i8 0, i8* %tmp10, align 1 |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %arg1, i8* align 8 %tmp5, i64 16, i1 false) |
| call void @llvm.lifetime.end.p0i8(i64 16, i8* %tmp5) |
| ret void |
| } |
| |
| define void @memcpy_memcpy_across_lifetime(i8* noalias %p1, i8* noalias %p2, i8* noalias %p3) { |
| ; CHECK-LABEL: @memcpy_memcpy_across_lifetime( |
| ; CHECK-NEXT: [[A:%.*]] = alloca [16 x i8], align 1 |
| ; CHECK-NEXT: [[A8:%.*]] = getelementptr inbounds [16 x i8], [16 x i8]* [[A]], i64 0, i64 0 |
| ; CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 16, i8* nonnull [[A8]]) |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(16) [[A8]], i8* noundef nonnull align 1 dereferenceable(16) [[P1:%.*]], i64 16, i1 false) |
| ; CHECK-NEXT: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(16) [[P1]], i8* noundef nonnull align 1 dereferenceable(16) [[P2:%.*]], i64 16, i1 false) |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(16) [[P2]], i8* noundef nonnull align 1 dereferenceable(16) [[A8]], i64 16, i1 false) |
| ; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull [[A8]]) |
| ; CHECK-NEXT: tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* noundef nonnull align 1 dereferenceable(16) [[P3:%.*]], i8* noundef nonnull align 1 dereferenceable(16) [[P2]], i64 16, i1 false) |
| ; CHECK-NEXT: ret void |
| ; |
| %a = alloca [16 x i8] |
| %a8 = bitcast [16 x i8]* %a to i8* |
| call void @llvm.lifetime.start.p0i8(i64 16, i8* %a8) |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* %a8, i8* %p1, i64 16, i1 false) |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* %p1, i8* %p2, i64 16, i1 false) |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* %p2, i8* %a8, i64 16, i1 false) |
| call void @llvm.lifetime.end.p0i8(i64 16, i8* %a8) |
| call void @llvm.memcpy.p0i8.p0i8.i64(i8* %p3, i8* %p2, i64 16, i1 false) |
| ret void |
| } |
| |
| attributes #1 = { argmemonly nounwind } |