File: crash-on-large-allocas.ll

package info (click to toggle)
llvm-toolchain-6.0 1%3A6.0.1-10
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 598,080 kB
  • sloc: cpp: 3,046,253; ansic: 595,057; asm: 271,965; python: 128,926; objc: 106,554; sh: 21,906; lisp: 10,191; pascal: 6,094; ml: 5,544; perl: 5,265; makefile: 2,227; cs: 2,027; xml: 686; php: 212; csh: 117
file content (16 lines) | stat: -rw-r--r-- 476 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
; RUN: opt -S -codegenprepare %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.p0i8(i8* %i, i1 false, i1 false)
  ; CHECK: ret i16 -1
  ret i16 %j
}

declare i16 @llvm.objectsize.i16.p0i8(i8*, i1, i1)