File: pr56424.ll

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,998,520 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 (27 lines) | stat: -rw-r--r-- 770 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
 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s --passes=instcombine -S | FileCheck %s

; This would crash if we didn't check for a negative shift.
; https://github.com/llvm/llvm-project/issues/56424
define i64 @PR56424(i1 %cond, i32 %arg) {
; CHECK-LABEL: @PR56424(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br i1 [[COND:%.*]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK:       if.then:
; CHECK-NEXT:    br label [[IF_END]]
; CHECK:       if.end:
; CHECK-NEXT:    ret i64 0
;
entry:
  br i1 %cond, label %if.then, label %if.end

if.then:
  %shr  = ashr i32 %arg, -2
  %sext = sext i32 %shr to i64
  br label %if.end

if.end:
  %val = phi i64 [ %sext, %if.then ], [ 0, %entry ]
  %and = and i64 -81, %val
  ret i64 %and
}