File: alloca-offset-lifetime.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 (27 lines) | stat: -rw-r--r-- 921 bytes parent folder | download | duplicates (12) 
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
 
; Test that ASAN will not instrument lifetime markers on alloca offsets.
;
; RUN: opt < %s -passes=asan --asan-use-after-scope -S | FileCheck %s

target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.15.0"

%t = type { ptr, ptr, %sub, i64 }
%sub = type { i32 }

define void @foo() sanitize_address {
entry:
  %0 = alloca %t, align 8
  %x = getelementptr inbounds %t, ptr %0, i64 0, i32 2
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %x)
  call void @bar(ptr nonnull %x)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %x) #3
  ret void
}

declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture)
declare void @bar(ptr)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture)

; CHECK: store i64 %[[STACK_BASE:.+]], ptr %asan_local_stack_base, align 8
; CHECK-NOT: store i8 0
; CHECK: call void @bar(ptr nonnull %x)