1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -indvars -S < %s | FileCheck %s
3; RUN: opt -passes=indvars -S < %s | FileCheck %s
4
5declare i1 @cond()
6
7define i32 @test_01(i32* %p, i32* %s) {
8; CHECK-LABEL: @test_01(
9; CHECK-NEXT:  entry:
10; CHECK-NEXT:    [[START:%.*]] = load i32, i32* [[P:%.*]], align 4, !range [[RNG0:![0-9]+]]
11; CHECK-NEXT:    [[END:%.*]] = load i32, i32* [[S:%.*]], align 4, !range [[RNG0]]
12; CHECK-NEXT:    br label [[LOOP:%.*]]
13; CHECK:       loop:
14; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ [[START]], [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
15; CHECK-NEXT:    [[C1:%.*]] = icmp slt i32 [[IV]], [[END]]
16; CHECK-NEXT:    br i1 [[C1]], label [[GUARDED:%.*]], label [[SIDE_EXIT:%.*]]
17; CHECK:       guarded:
18; CHECK-NEXT:    br i1 true, label [[BACKEDGE]], label [[SIDE_EXIT]]
19; CHECK:       backedge:
20; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
21; CHECK-NEXT:    [[LOOP_COND:%.*]] = call i1 @cond()
22; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
23; CHECK:       exit:
24; CHECK-NEXT:    ret i32 1
25; CHECK:       side_exit:
26; CHECK-NEXT:    ret i32 0
27;
28entry:
29  %start = load i32, i32* %p, !range !0
30  %end = load i32, i32* %s, !range !0
31  br label %loop
32
33loop:
34  %iv = phi i32 [%start, %entry], [%iv.next, %backedge]
35  %c1 = icmp slt i32 %iv, %end
36  br i1 %c1, label %guarded, label %side_exit
37
38guarded:
39  %c2 = icmp ult i32 %iv, %end
40  br i1 %c2, label %backedge, label %side_exit
41
42backedge:
43  %iv.next = add nuw nsw i32 %iv, 1
44  %loop.cond = call i1 @cond()
45  br i1 %loop.cond, label %loop, label %exit
46
47exit:
48  ret i32 1
49
50side_exit:
51  ret i32 0
52}
53
54define i32 @test_02(i32* %p, i32* %s) {
55; CHECK-LABEL: @test_02(
56; CHECK-NEXT:  entry:
57; CHECK-NEXT:    [[START:%.*]] = load i32, i32* [[P:%.*]], align 4, !range [[RNG0]]
58; CHECK-NEXT:    [[END:%.*]] = load i32, i32* [[S:%.*]], align 4, !range [[RNG0]]
59; CHECK-NEXT:    br label [[LOOP:%.*]]
60; CHECK:       loop:
61; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ [[START]], [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
62; CHECK-NEXT:    [[C1:%.*]] = icmp ult i32 [[IV]], [[END]]
63; CHECK-NEXT:    br i1 [[C1]], label [[GUARDED:%.*]], label [[SIDE_EXIT:%.*]]
64; CHECK:       guarded:
65; CHECK-NEXT:    br i1 true, label [[BACKEDGE]], label [[SIDE_EXIT]]
66; CHECK:       backedge:
67; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
68; CHECK-NEXT:    [[LOOP_COND:%.*]] = call i1 @cond()
69; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
70; CHECK:       exit:
71; CHECK-NEXT:    ret i32 1
72; CHECK:       side_exit:
73; CHECK-NEXT:    ret i32 0
74;
75entry:
76  %start = load i32, i32* %p, !range !0
77  %end = load i32, i32* %s, !range !0
78  br label %loop
79
80loop:
81  %iv = phi i32 [%start, %entry], [%iv.next, %backedge]
82  %c1 = icmp ult i32 %iv, %end
83  br i1 %c1, label %guarded, label %side_exit
84
85guarded:
86  %c2 = icmp slt i32 %iv, %end
87  br i1 %c2, label %backedge, label %side_exit
88
89backedge:
90  %iv.next = add nuw nsw i32 %iv, 1
91  %loop.cond = call i1 @cond()
92  br i1 %loop.cond, label %loop, label %exit
93
94exit:
95  ret i32 1
96
97side_exit:
98  ret i32 0
99}
100
101!0 = !{i32 -1000, i32 0}
102