1; RUN: opt < %s -analyze -block-freq | FileCheck %s
2; RUN: opt < %s -passes='print<block-freq>' -disable-output 2>&1 | FileCheck %s
3
4; PR21622: Check for a crasher when the sum of exits to the same successor of a
5; loop overflows.
6
7; CHECK-LABEL: Printing analysis {{.*}} for function 'extremely_likely_loop_successor':
8; CHECK-NEXT: block-frequency-info: extremely_likely_loop_successor
9define void @extremely_likely_loop_successor() {
10; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]
11entry:
12  br label %loop
13
14; CHECK-NEXT: loop: float = 1.0,
15loop:
16  %exit.1.cond = call i1 @foo()
17  br i1 %exit.1.cond, label %exit, label %loop.2, !prof !0
18
19; CHECK-NEXT: loop.2: float = 0.0000000
20loop.2:
21  %exit.2.cond = call i1 @foo()
22  br i1 %exit.2.cond, label %exit, label %loop.3, !prof !0
23
24; CHECK-NEXT: loop.3: float = 0.0000000
25loop.3:
26  %exit.3.cond = call i1 @foo()
27  br i1 %exit.3.cond, label %exit, label %loop.4, !prof !0
28
29; CHECK-NEXT: loop.4: float = 0.0,
30loop.4:
31  %exit.4.cond = call i1 @foo()
32  br i1 %exit.4.cond, label %exit, label %loop, !prof !0
33
34; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]
35exit:
36  ret void
37}
38
39declare i1 @foo()
40
41!0 = !{!"branch_weights", i32 4294967295, i32 1}
42