File: nontrivial-unswitch-redundant-switch.ll

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm-proposed-updates
  • size: 1,998,492 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (24 lines) | stat: -rw-r--r-- 569 bytes parent folder | download | duplicates (12) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
; REQUIRES: asserts
; RUN: opt -passes='simple-loop-unswitch<nontrivial>' -disable-output -S < %s
; RUN: opt -passes='loop-mssa(simple-loop-unswitch<nontrivial>)' -disable-output -S < %s

; This loop shouldn't trigger asserts in SimpleLoopUnswitch.
define void @test_redundant_switch(ptr %ptr, i32 %cond) {
entry:
  br label %loop_begin

loop_begin:
  switch i32 %cond, label %loop_body [
      i32 0, label %loop_body
  ]

loop_body:
  br label %loop_latch

loop_latch:
  %v = load i1, ptr %ptr
  br i1 %v, label %loop_begin, label %loop_exit

loop_exit:
  ret void
}