File: pr37888.ll

package info (click to toggle)
llvm-toolchain-17 1%3A17.0.6-22
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,799,624 kB
  • sloc: cpp: 6,428,607; ansic: 1,383,196; asm: 793,408; python: 223,504; objc: 75,364; f90: 60,502; lisp: 33,869; pascal: 15,282; sh: 9,684; perl: 7,453; ml: 4,937; awk: 3,523; makefile: 2,889; javascript: 2,149; xml: 888; fortran: 619; cs: 573
file content (38 lines) | stat: -rw-r--r-- 951 bytes parent folder | download | duplicates (8) 
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
31
32
33
34
35
36
37
38
 
; RUN: opt -passes=simple-loop-unswitch,loop-deletion -verify-memoryssa -S < %s | FileCheck %s
;
; Check that when we do unswitching where we re-enqueue the loop to be processed
; again, but manage to delete the loop before ever getting to iterate on it, it
; doesn't crash the legacy pass manager.

target triple = "x86_64-unknown-linux-gnu"

define void @pr37888() {
; CHECK-LABEL: define void @pr37888()
entry:
  %tobool = icmp ne i16 undef, 0
  br label %for.body
; CHECK:         %[[TOBOOL:.*]] = icmp ne
; CHECK-NEXT:    br i1 %[[TOBOOL]], label %if.then, label %[[ENTRY_SPLIT:.*]]
;
; CHECK:       [[ENTRY_SPLIT]]:
; CHECK-NEXT:    br label %for.end

for.body:
  br i1 %tobool, label %if.then, label %if.end

if.then:
  unreachable
; CHECK:       if.then:
; CHECK-NEXT:    unreachable

if.end:
  br label %for.inc

for.inc:
  br i1 undef, label %for.body, label %for.end

for.end:
  ret void
; CHECK:       for.end:
; CHECK-NEXT:    ret void
}