File: 2016-07-17-UseAfterFree.ll

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
file content (32 lines) | stat: -rw-r--r-- 1,065 bytes parent folder | download | duplicates (8) 
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
28
29
30
31
32
 
; RUN: opt < %s -basic-aa -dse -S -enable-dse-partial-overwrite-tracking | FileCheck %s
; PR28588

target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: nounwind
define void @_UPT_destroy(i8* nocapture %ptr) local_unnamed_addr #0 {
entry:
  %edi = getelementptr inbounds i8, i8* %ptr, i64 8

; CHECK-NOT: tail call void @llvm.memset.p0i8.i64(i8* align 8 %edi, i8 0, i64 176, i1 false)
; CHECK-NOT: store i32 -1, i32* %addr

  tail call void @llvm.memset.p0i8.i64(i8* align 8 %edi, i8 0, i64 176, i1 false)
  %format4.i = getelementptr inbounds i8, i8* %ptr, i64 144
  %addr = bitcast i8* %format4.i to i32*
  store i32 -1, i32* %addr, align 8

; CHECK: tail call void @free
  tail call void @free(i8* nonnull %ptr)
  ret void
}

; Function Attrs: nounwind
declare void @free(i8* nocapture) local_unnamed_addr #0

; Function Attrs: argmemonly nounwind
declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1) #1

attributes #0 = { nounwind }
attributes #1 = { argmemonly nounwind }