File: exit_value_test3.ll

package info (click to toggle)
llvm-toolchain-3.9 1%3A3.9.1-8
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 441,060 kB
  • ctags: 428,777
  • sloc: cpp: 2,546,577; ansic: 538,318; asm: 119,677; objc: 103,316; python: 102,148; sh: 27,847; pascal: 5,626; ml: 5,510; perl: 5,293; lisp: 4,801; makefile: 2,177; xml: 686; cs: 362; php: 212; csh: 117
file content (24 lines) | stat: -rw-r--r-- 830 bytes parent folder | download | duplicates (21)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
; RUN: opt < %s -indvars -loop-deletion -S |FileCheck %s

; Check IndVarSimplify should replace exit value even if the expansion cost
; is high because the loop can be deleted after the exit value rewrite.
;
; CHECK-LABEL: @_Z3fooPKcjj(
; CHECK: udiv
; CHECK: [[LABEL:^[a-zA-Z0-9_.]+]]:
; CHECK-NOT: br {{.*}} [[LABEL]]

define i32 @_Z3fooPKcjj(i8* nocapture readnone %s, i32 %len, i32 %c) #0 {
entry:
  br label %while.cond

while.cond:                                       ; preds = %while.cond, %entry
  %klen.0 = phi i32 [ %len, %entry ], [ %sub, %while.cond ]
  %cmp = icmp ugt i32 %klen.0, 11
  %sub = add i32 %klen.0, -12
  br i1 %cmp, label %while.cond, label %while.end

while.end:                                        ; preds = %while.cond
  %klen.0.lcssa = phi i32 [ %klen.0, %while.cond ]
  ret i32 %klen.0.lcssa
}