File: msan_invalidate.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 (30 lines) | stat: -rw-r--r-- 840 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
28
29
30
 
; Regression test for msan not invalidating GlobalsAA.
; RUN: opt < %s -S -passes='require<globals-aa>,module(msan),require<globals-aa>,early-cse<memssa>' 2>&1 | FileCheck %s

target triple = "x86_64-unknown-linux"

define ptr @foo(ptr %p) local_unnamed_addr sanitize_memory {
entry:
  ret ptr %p
}

define i32 @test() local_unnamed_addr sanitize_memory {
entry:
  ; CHECK-LABEL: define i32 @test()

  %x = alloca i32
  store i32 7, ptr %x
  
  ; CHECK: store i64 0, ptr @__msan_retval_tls
  ; CHECK-NEXT: call ptr @foo(

  %call = call ptr @foo(ptr %x)

  ; If GlobalsAA is eliminated correctly, early-cse should not remove next load.
  ; CHECK-NEXT: %[[MSRET:.*]] = load i64, ptr @__msan_retval_tls
  ; CHECK-NEXT: %[[MSCMP:.*]] = icmp ne i64 %[[MSRET]], 0
  ; CHECK-NEXT: br i1 %[[MSCMP]],

  %ret = load i32, ptr %call
  ret i32 %ret
}