File: speculate-blocks.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 (29 lines) | stat: -rw-r--r-- 914 bytes parent folder | download | duplicates (2) 
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
 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt < %s -S -passes='simplifycfg<speculate-blocks>' | FileCheck %s --check-prefix=YES
; RUN: opt < %s -S -passes='simplifycfg<no-speculate-blocks>' | FileCheck %s --check-prefix=NO

define i32 @f(i1 %a) {
; YES-LABEL: define i32 @f
; YES-SAME: (i1 [[A:%.*]]) {
; YES-NEXT:  entry:
; YES-NEXT:    [[SPEC_SELECT:%.*]] = select i1 [[A]], i32 5, i32 2
; YES-NEXT:    ret i32 [[SPEC_SELECT]]
;
; NO-LABEL: define i32 @f
; NO-SAME: (i1 [[A:%.*]]) {
; NO-NEXT:  entry:
; NO-NEXT:    br i1 [[A]], label [[BB:%.*]], label [[BB2:%.*]]
; NO:       bb:
; NO-NEXT:    br label [[BB2]]
; NO:       bb2:
; NO-NEXT:    [[R:%.*]] = phi i32 [ 2, [[ENTRY:%.*]] ], [ 5, [[BB]] ]
; NO-NEXT:    ret i32 [[R]]
;
entry:
  br i1 %a, label %bb, label %bb2
bb:
  br label %bb2
bb2:
  %r = phi i32 [ 2, %entry ], [ 5, %bb ]
  ret i32 %r
}