1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals
2 ; RUN: opt -passes=instcombine -S < %s | FileCheck %s
4 ; Verify that instcombine preserves TBAA tags when converting a memcpy into
5 ; a scalar load and store.
7 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
9 declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind
13 define void @test1(ptr %a1, ptr %a2) {
14 ; CHECK-LABEL: @test1(
16 ; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[A2:%.*]], align 4, !tbaa [[TBAA0:![0-9]+]]
17 ; CHECK-NEXT: store i32 [[TMP0]], ptr [[A1:%.*]], align 4, !tbaa [[TBAA0]]
18 ; CHECK-NEXT: ret void
21 tail call void @llvm.memcpy.p0.p0.i64(ptr align 4 %a1, ptr align 4 %a2, i64 4, i1 false), !tbaa !4 ; TAG_A
28 ; CHECK-LABEL: @test2(
29 ; CHECK-NEXT: store i1 true, ptr poison, align 1
30 ; CHECK-NEXT: ret ptr poison
32 %tmp = alloca %B, align 8
33 call void @llvm.memcpy.p0.p0.i64(ptr align 8 %tmp, ptr align 8 undef, i64 8, i1 false), !tbaa !7 ; TAG_B
34 %tmp3 = load ptr, ptr %tmp
41 !3 = !{!1, i64 4, !"A", !2, i64 0, i64 4}
42 !4 = !{!3, !3, i64 0, i64 4}
43 !5 = !{!1, !"pointer"}
44 !6 = !{!1, i64 8, !"B", !5, i64 0, i64 8}
45 !7 = !{!6, !6, i64 0, i64 8}
47 ; Note that the memcpy() call in test2() transforms into an
48 ; undecorated 'store undef', so TAG_B is not present in the output.
51 ; CHECK: attributes #[[ATTR0:[0-9]+]] = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
53 ; CHECK: [[TBAA0]] = !{!1, !1, i64 0, i64 4}
54 ; CHECK: [[META1:![0-9]+]] = !{!2, i64 4, !"A", !4, i64 0, i64 4}
55 ; CHECK: [[META2:![0-9]+]] = !{!3, !"char"}
56 ; CHECK: [[META3:![0-9]+]] = !{!"root"}
57 ; CHECK: [[META4:![0-9]+]] = !{!2, !"float"}