1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -O2 -S < %s -enable-new-pm=0 | FileCheck %s
3; RUN: opt -passes='default<O2>' -S < %s | FileCheck %s
4
5define void @copy(i32* noalias %to, i32* noalias %from) {
6; CHECK-LABEL: @copy(
7; CHECK-NEXT:    [[X:%.*]] = load i32, i32* [[FROM:%.*]], align 4
8; CHECK-NEXT:    store i32 [[X]], i32* [[TO:%.*]], align 4
9; CHECK-NEXT:    ret void
10;
11  %x = load i32, i32* %from
12  store i32 %x, i32* %to
13  ret void
14}
15
16; Consider that %addr1 = %addr2 + 1, in which case %addr2i and %addr1i are
17; noalias within one iteration, but may alias across iterations.
18define void @pr39282(i32* %addr1, i32* %addr2) {
19; CHECK-LABEL: @pr39282(
20; CHECK-NEXT:  start:
21; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
22; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
23; CHECK-NEXT:    [[X_I:%.*]] = load i32, i32* [[ADDR1:%.*]], align 4, !alias.scope !3, !noalias !0
24; CHECK-NEXT:    store i32 [[X_I]], i32* [[ADDR2:%.*]], align 4, !alias.scope !0, !noalias !3
25; CHECK-NEXT:    [[ADDR1I_1:%.*]] = getelementptr inbounds i32, i32* [[ADDR1]], i64 1
26; CHECK-NEXT:    [[ADDR2I_1:%.*]] = getelementptr inbounds i32, i32* [[ADDR2]], i64 1
27; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
28; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
29; CHECK-NEXT:    [[X_I_1:%.*]] = load i32, i32* [[ADDR1I_1]], align 4, !alias.scope !7, !noalias !5
30; CHECK-NEXT:    store i32 [[X_I_1]], i32* [[ADDR2I_1]], align 4, !alias.scope !5, !noalias !7
31; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
32; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
33; CHECK-NEXT:    [[X_I_2:%.*]] = load i32, i32* [[ADDR1]], align 4, !alias.scope !11, !noalias !9
34; CHECK-NEXT:    store i32 [[X_I_2]], i32* [[ADDR2]], align 4, !alias.scope !9, !noalias !11
35; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
36; CHECK-NEXT:    call void @llvm.experimental.noalias.scope.decl
37; CHECK-NEXT:    [[X_I_3:%.*]] = load i32, i32* [[ADDR1I_1]], align 4, !alias.scope !15, !noalias !13
38; CHECK-NEXT:    store i32 [[X_I_3]], i32* [[ADDR2I_1]], align 4, !alias.scope !13, !noalias !15
39; CHECK-NEXT:    ret void
40;
41start:
42  br label %body
43
44body:
45  %i = phi i32 [ 0, %start ], [ %i.next, %body ]
46  %j = and i32 %i, 1
47  %addr1i = getelementptr inbounds i32, i32* %addr1, i32 %j
48  %addr2i = getelementptr inbounds i32, i32* %addr2, i32 %j
49  call void @copy(i32* %addr2i, i32* %addr1i)
50  %i.next = add i32 %i, 1
51  %cmp = icmp slt i32 %i.next, 4
52  br i1 %cmp, label %body, label %end
53
54end:
55  ret void
56}
57