extremely-likely-loop-successor.ll
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; RUN: opt < %s -analyze -block-freq | FileCheck %s
; RUN: opt < %s -passes='print<block-freq>' -disable-output 2>&1 | FileCheck %s
; PR21622: Check for a crasher when the sum of exits to the same successor of a
; loop overflows.
; CHECK-LABEL: Printing analysis {{.*}} for function 'extremely_likely_loop_successor':
; CHECK-NEXT: block-frequency-info: extremely_likely_loop_successor
define void @extremely_likely_loop_successor() {
; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]
entry:
br label %loop
; CHECK-NEXT: loop: float = 1.0,
loop:
%exit.1.cond = call i1 @foo()
br i1 %exit.1.cond, label %exit, label %loop.2, !prof !0
; CHECK-NEXT: loop.2: float = 0.0000000
loop.2:
%exit.2.cond = call i1 @foo()
br i1 %exit.2.cond, label %exit, label %loop.3, !prof !0
; CHECK-NEXT: loop.3: float = 0.0000000
loop.3:
%exit.3.cond = call i1 @foo()
br i1 %exit.3.cond, label %exit, label %loop.4, !prof !0
; CHECK-NEXT: loop.4: float = 0.0,
loop.4:
%exit.4.cond = call i1 @foo()
br i1 %exit.4.cond, label %exit, label %loop, !prof !0
; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]
exit:
ret void
}
declare i1 @foo()
!0 = !{!"branch_weights", i32 4294967295, i32 1}