File: nonnull-gep-out-of-bounds.ll

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (18 lines) | stat: -rw-r--r-- 568 bytes parent folder | download | duplicates (14) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
 
; RUN: opt -passes=jump-threading -S %s -o - | FileCheck %s

define i32 @f(ptr %a, i64 %i) {
entry:
  store i64 0, ptr %a, align 8
  %p = getelementptr i64, ptr %a, i64 %i
  %c = icmp eq ptr %p, null
  ; `%a` is non-null at the end of the block, because we store through it.
  ; However, `%p` is derived from `%a` via a GEP that is not `inbounds`, therefore we cannot judge `%p` is non-null as well
  ; and must retain the `icmp` instruction.
  ; CHECK: %c = icmp eq ptr %p, null
  br i1 %c, label %if.else, label %if.then
if.then:
  ret i32 0

if.else:
  ret i32 1
}