File: nontrivial-unswitch-redundant-switch.ll

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (25 lines) | stat: -rw-r--r-- 654 bytes parent folder | download | duplicates (7) 
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
 
; 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
; RUN: opt -simple-loop-unswitch -enable-nontrivial-unswitch -disable-output -S < %s

; This loop shouldn't trigger asserts in SimpleLoopUnswitch.
define void @test_redundant_switch(i1* %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, i1* %ptr
  br i1 %v, label %loop_begin, label %loop_exit

loop_exit:
  ret void
}