File: null-ptr-is-valid-attribute.ll

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-6~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,418,812 kB
  • sloc: cpp: 5,290,827; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,900; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,892; xml: 953; cs: 573; fortran: 539
file content (20 lines) | stat: -rw-r--r-- 611 bytes parent folder | download | duplicates (6) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -instsimplify < %s | FileCheck %s

; A 0 valued byval pointer may be valid
define i1 @byval_may_be_zero(i32* byval(i32) %ptr) null_pointer_is_valid {
; CHECK-LABEL: @byval_may_be_zero(
; CHECK-NEXT:    [[CMP:%.*]] = icmp eq i32* [[PTR:%.*]], null
; CHECK-NEXT:    ret i1 [[CMP]]
;
  %cmp = icmp eq i32* %ptr, null
  ret i1 %cmp
}

define i1 @nonnull_may_be_zero(i32* nonnull %ptr) null_pointer_is_valid {
; CHECK-LABEL: @nonnull_may_be_zero(
; CHECK-NEXT:    ret i1 false
;
  %cmp = icmp eq i32* %ptr, null
  ret i1 %cmp
}