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1; RUN: opt < %s -analyze -block-freq | FileCheck %s
2
3; PR21622: Check for a crasher when the sum of exits to the same successor of a
4; loop overflows.
5
6; CHECK-LABEL: Printing analysis {{.*}} for function 'extremely_likely_loop_successor':
7; CHECK-NEXT: block-frequency-info: extremely_likely_loop_successor
8define void @extremely_likely_loop_successor() {
9; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]
10entry:
11  br label %loop
12
13; CHECK-NEXT: loop: float = 1.0,
14loop:
15  %exit.1.cond = call i1 @foo()
16  br i1 %exit.1.cond, label %exit, label %loop.2, !prof !0
17
18; CHECK-NEXT: loop.2: float = 0.0000000
19loop.2:
20  %exit.2.cond = call i1 @foo()
21  br i1 %exit.2.cond, label %exit, label %loop.3, !prof !0
22
23; CHECK-NEXT: loop.3: float = 0.0000000
24loop.3:
25  %exit.3.cond = call i1 @foo()
26  br i1 %exit.3.cond, label %exit, label %loop.4, !prof !0
27
28; CHECK-NEXT: loop.4: float = 0.0,
29loop.4:
30  %exit.4.cond = call i1 @foo()
31  br i1 %exit.4.cond, label %exit, label %loop, !prof !0
32
33; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]
34exit:
35  ret void
36}
37
38declare i1 @foo()
39
40!0 = !{!"branch_weights", i32 4294967295, i32 1}
41