File: 2010-01-28-NegativeSRem.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 (28 lines) | stat: -rw-r--r-- 965 bytes parent folder | download | duplicates (13) 
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
 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
; PR6165

define i32 @f() {
; CHECK-LABEL: @f(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[BB1:%.*]]
; CHECK:       BB1:
; CHECK-NEXT:    [[X:%.*]] = phi i32 [ -29, [[ENTRY:%.*]] ], [ 0, [[BB1]] ]
; CHECK-NEXT:    [[REM:%.*]] = srem i32 [[X]], 2
; CHECK-NEXT:    [[T:%.*]] = icmp eq i32 [[REM]], -1
; CHECK-NEXT:    br i1 [[T]], label [[BB2:%.*]], label [[BB1]]
; CHECK:       BB2:
; CHECK-NEXT:    ret i32 [[X]]
;
entry:
  br label %BB1

BB1:                                              ; preds = %BB1, %entry
  %x = phi i32 [ -29, %entry ], [ 0, %BB1 ]       ; <i32> [#uses=2]
  %rem = srem i32 %x, 2                           ; <i32> [#uses=1]
  %t = icmp eq i32 %rem, -1                       ; <i1> [#uses=1]
  br i1 %t, label %BB2, label %BB1

BB2:                                              ; preds = %BB1
  ret i32 %x
}