File: crash-on-large-allocas.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 (16 lines) | stat: -rw-r--r-- 504 bytes parent folder | download | duplicates (12) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 
; RUN: opt -S -passes=lower-constant-intrinsics %s -o - | FileCheck %s
;
; Ensure that we don't {crash,return a bad value} when given an alloca larger
; than what a pointer can represent.

target datalayout = "p:16:16"

; CHECK-LABEL: @alloca_overflow_is_unknown(
define i16 @alloca_overflow_is_unknown() {
  %i = alloca i8, i32 65537
  %j = call i16 @llvm.objectsize.i16.p0(ptr %i, i1 false, i1 false, i1 false)
  ; CHECK: ret i16 -1
  ret i16 %j
}

declare i16 @llvm.objectsize.i16.p0(ptr, i1, i1, i1)