forked from OSchip/llvm-project
42 lines
1.2 KiB
LLVM
42 lines
1.2 KiB
LLVM
; 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}
|