File: switch-simplify-crash2.ll

package info (click to toggle)
llvm-toolchain-18 1%3A18.1.8-18
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,908,340 kB
  • sloc: cpp: 6,667,937; ansic: 1,440,452; asm: 883,619; python: 230,549; objc: 76,880; f90: 74,238; lisp: 35,989; pascal: 16,571; sh: 10,229; perl: 7,459; ml: 5,047; awk: 3,523; makefile: 2,987; javascript: 2,149; xml: 892; fortran: 649; cs: 573
file content (30 lines) | stat: -rw-r--r-- 808 bytes parent folder | download | duplicates (10) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes="simplifycfg<forward-switch-cond;no-keep-loops>" < %s | FileCheck %s

define i8 @test() {
; CHECK-LABEL: @test(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP2:%.*]]
; CHECK:       loop2:
; CHECK-NEXT:    [[PHI2:%.*]] = phi i8 [ 0, [[ENTRY:%.*]] ], [ [[SPEC_SELECT:%.*]], [[LOOP2]] ]
; CHECK-NEXT:    [[COND:%.*]] = icmp eq i8 [[PHI2]], 0
; CHECK-NEXT:    [[SPEC_SELECT]] = select i1 [[COND]], i8 0, i8 [[PHI2]]
; CHECK-NEXT:    br label [[LOOP2]]
;
entry:
  br label %loop

loop:
  %phi1 = phi i8 [ 0, %entry ], [ %phi2, %loop2 ]
  br label %loop2

loop2:
  %phi2 = phi i8 [ %phi1, %loop ], [ 0, %loop2 ]
  switch i8 %phi2, label %loop [
  i8 0, label %loop2
  i8 1, label %exit
  ]

exit:
  ret i8 0
}