1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -passes='default<O2>' -S < %s | FileCheck %s
3
4define void @copy(i32* noalias %to, i32* noalias %from) {
5; CHECK-LABEL: @copy(
6; CHECK-NEXT:    [[X:%.*]] = load i32, i32* [[FROM:%.*]], align 4
7; CHECK-NEXT:    store i32 [[X]], i32* [[TO:%.*]], align 4
8; CHECK-NEXT:    ret void
9;
10  %x = load i32, i32* %from
11  store i32 %x, i32* %to
12  ret void
13}
14
15; Consider that %addr1 = %addr2 + 1, in which case %addr2i and %addr1i are
16; noalias within one iteration, but may alias across iterations.
17define void @pr39282(i32* %addr1, i32* %addr2) {
18; CHECK-LABEL: @pr39282(
19; CHECK-NEXT:  start:
20; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
21; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
22; CHECK-NEXT:    [[X_I:%.*]] = load i32, i32* [[ADDR1:%.*]], align 4, !alias.scope !3, !noalias !0
23; CHECK-NEXT:    store i32 [[X_I]], i32* [[ADDR2:%.*]], align 4, !alias.scope !0, !noalias !3
24; CHECK-NEXT:    [[ADDR1I_1:%.*]] = getelementptr inbounds i32, i32* [[ADDR1]], i64 1
25; CHECK-NEXT:    [[ADDR2I_1:%.*]] = getelementptr inbounds i32, i32* [[ADDR2]], i64 1
26; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
27; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
28; CHECK-NEXT:    [[X_I_1:%.*]] = load i32, i32* [[ADDR1I_1]], align 4, !alias.scope !7, !noalias !5
29; CHECK-NEXT:    store i32 [[X_I_1]], i32* [[ADDR2I_1]], align 4, !alias.scope !5, !noalias !7
30; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
31; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
32; CHECK-NEXT:    [[X_I_2:%.*]] = load i32, i32* [[ADDR1]], align 4, !alias.scope !11, !noalias !9
33; CHECK-NEXT:    store i32 [[X_I_2]], i32* [[ADDR2]], align 4, !alias.scope !9, !noalias !11
34; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
35; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
36; CHECK-NEXT:    [[X_I_3:%.*]] = load i32, i32* [[ADDR1I_1]], align 4, !alias.scope !15, !noalias !13
37; CHECK-NEXT:    store i32 [[X_I_3]], i32* [[ADDR2I_1]], align 4, !alias.scope !13, !noalias !15
38; CHECK-NEXT:    ret void
39;
40start:
41  br label %body
42
43body:
44  %i = phi i32 [ 0, %start ], [ %i.next, %body ]
45  %j = and i32 %i, 1
46  %addr1i = getelementptr inbounds i32, i32* %addr1, i32 %j
47  %addr2i = getelementptr inbounds i32, i32* %addr2, i32 %j
48  call void @copy(i32* %addr2i, i32* %addr1i)
49  %i.next = add i32 %i, 1
50  %cmp = icmp slt i32 %i.next, 4
51  br i1 %cmp, label %body, label %end
52
53end:
54  ret void
55}
56