1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -S -loop-simplifycfg -verify-scev < %s | FileCheck %s
3
4; Verify that the scev information is still valid. Verification should not fail
5
6define void @t_run_test() {
7; CHECK-LABEL: @t_run_test(
8; CHECK-NEXT:  entry:
9; CHECK-NEXT:    br label %[[LOOP_PH:.*]]
10; CHECK:       [[LOOP_PH]]:
11; CHECK-NEXT:    br label %[[LOOP_BODY:.*]]
12; CHECK:       [[LOOP_BODY]]:
13; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, %[[LOOP_PH]] ], [ [[INC:%.*]], %[[LOOP_BODY]] ]
14; CHECK-NEXT:    [[INC]] = add i32 [[IV]], 1
15; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i32 [[INC]], 10
16; CHECK-NEXT:    br i1 [[CMP]], label %[[LOOP_BODY]], label %[[EXIT:.*]]
17; CHECK:       [[EXIT]]:
18; CHECK-NEXT:    br label %[[LOOP_BODY2:.*]]
19; CHECK:       [[LOOP_BODY2]]:
20; CHECK-NEXT:    [[IV2:%.*]] = phi i32 [ 0, %[[EXIT]] ], [ [[INC2:%.*]], %[[LOOP_BODY2]] ]
21; CHECK-NEXT:    [[INC2]] = add i32 [[IV2]], 1
22; CHECK-NEXT:    [[CMP2:%.*]] = icmp ult i32 [[INC2]], 10
23; CHECK-NEXT:    br i1 [[CMP2]], label %[[LOOP_BODY2]], label %[[EXIT2:.*]]
24; CHECK:       [[EXIT2]]:
25; CHECK-NEXT:    ret void
26;
27entry:
28  br label %loop.ph
29
30loop.ph:
31  br label %loop.header
32
33loop.header:
34  %iv = phi i32 [0, %loop.ph], [%inc, %loop.body]
35  br label %loop.body1
36
37loop.body1:
38  br label %loop.body
39
40loop.body:
41  %inc = add i32 %iv, 1
42  %cmp = icmp ult i32 %inc, 10
43  br i1 %cmp, label %loop.header, label %exit
44
45exit:
46  br label %loop.body2
47
48loop.body2:
49  %iv2 = phi i32 [0, %exit], [%inc2, %loop.body2]
50  %inc2 = add i32 %iv2, 1
51  %cmp2 = icmp ult i32 %inc2, 10
52  br i1 %cmp2, label %loop.body2, label %exit2
53
54exit2:
55  ret void
56}
57
58