1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -indvars -S < %s | FileCheck %s
3
4@b = common global i32 0, align 4
5@c = common global i32 0, align 4
6@a = common global i32 0, align 4
7
8declare void @abort() #1
9
10; Function Attrs: nounwind ssp uwtable
11define i32 @main() {
12; CHECK-LABEL: @main(
13; CHECK-NEXT:  entry:
14; CHECK-NEXT:    [[A_PROMOTED13:%.*]] = load i32, i32* @a, align 4
15; CHECK-NEXT:    br label [[FOR_COND1_PREHEADER:%.*]]
16; CHECK:       for.cond1.preheader:
17; CHECK-NEXT:    [[OR_LCSSA14:%.*]] = phi i32 [ [[A_PROMOTED13]], [[ENTRY:%.*]] ], [ [[OR_LCSSA:%.*]], [[FOR_END:%.*]] ]
18; CHECK-NEXT:    [[D_010:%.*]] = phi i32 [ 1, [[ENTRY]] ], [ 0, [[FOR_END]] ]
19; CHECK-NEXT:    br label [[FOR_BODY3:%.*]]
20; CHECK:       for.body3:
21; CHECK-NEXT:    [[INC12:%.*]] = phi i32 [ 0, [[FOR_COND1_PREHEADER]] ], [ [[INC:%.*]], [[FOR_BODY3]] ]
22; CHECK-NEXT:    [[OR11:%.*]] = phi i32 [ [[OR_LCSSA14]], [[FOR_COND1_PREHEADER]] ], [ [[OR:%.*]], [[FOR_BODY3]] ]
23; CHECK-NEXT:    [[ADD:%.*]] = sub i32 [[INC12]], [[D_010]]
24; CHECK-NEXT:    [[OR]] = or i32 [[OR11]], [[ADD]]
25; CHECK-NEXT:    [[INC]] = add nuw nsw i32 [[INC12]], 1
26; CHECK-NEXT:    br i1 false, label [[FOR_BODY3]], label [[FOR_END]]
27; CHECK:       for.end:
28; CHECK-NEXT:    [[OR_LCSSA]] = phi i32 [ [[OR]], [[FOR_BODY3]] ]
29; CHECK-NEXT:    br i1 false, label [[FOR_COND1_PREHEADER]], label [[FOR_END6:%.*]]
30; CHECK:       for.end6:
31; CHECK-NEXT:    [[OR_LCSSA_LCSSA:%.*]] = phi i32 [ [[OR_LCSSA]], [[FOR_END]] ]
32; CHECK-NEXT:    store i32 [[OR_LCSSA_LCSSA]], i32* @a, align 4
33; CHECK-NEXT:    [[CMP7:%.*]] = icmp eq i32 [[OR_LCSSA_LCSSA]], -1
34; CHECK-NEXT:    br i1 [[CMP7]], label [[IF_END:%.*]], label [[IF_THEN:%.*]]
35; CHECK:       if.then:
36; CHECK-NEXT:    tail call void @abort()
37; CHECK-NEXT:    unreachable
38; CHECK:       if.end:
39; CHECK-NEXT:    ret i32 0
40;
41entry:
42  %a.promoted13 = load i32, i32* @a, align 4
43  br label %for.cond1.preheader
44
45for.cond1.preheader:                              ; preds = %entry, %for.end
46  %or.lcssa14 = phi i32 [ %a.promoted13, %entry ], [ %or.lcssa, %for.end ]
47  %d.010 = phi i32 [ 1, %entry ], [ 0, %for.end ]
48  br label %for.body3
49
50for.body3:                                        ; preds = %for.cond1.preheader, %for.body3
51  %inc12 = phi i32 [ 0, %for.cond1.preheader ], [ %inc, %for.body3 ]
52  %or11 = phi i32 [ %or.lcssa14, %for.cond1.preheader ], [ %or, %for.body3 ]
53  %add = sub i32 %inc12, %d.010
54  %or = or i32 %or11, %add
55  %inc = add i32 %inc12, 1
56  br i1 false, label %for.body3, label %for.end
57
58for.end:                                          ; preds = %for.body3
59  %or.lcssa = phi i32 [ %or, %for.body3 ]
60  br i1 false, label %for.cond1.preheader, label %for.end6
61
62for.end6:                                         ; preds = %for.end
63  %or.lcssa.lcssa = phi i32 [ %or.lcssa, %for.end ]
64  store i32 %or.lcssa.lcssa, i32* @a, align 4
65  %cmp7 = icmp eq i32 %or.lcssa.lcssa, -1
66  br i1 %cmp7, label %if.end, label %if.then
67
68if.then:                                          ; preds = %for.end6
69  tail call void @abort() #2
70  unreachable
71
72if.end:                                           ; preds = %for.end6
73  ret i32 0
74}
75