File: vptr_read.ll

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (13 lines) | stat: -rw-r--r-- 502 bytes parent folder | download | duplicates (15) 
1
2
3
4
5
6
7
8
9
10
11
12
13
 
; RUN: opt < %s -tsan -S | FileCheck %s
; Check that vptr reads are treated in a special way.
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"

define i8 @Foo(i8* %a) nounwind uwtable sanitize_thread {
entry:
; CHECK: call void @__tsan_vptr_read
  %0 = load i8, i8* %a, align 8, !tbaa !0
  ret i8 %0
}
!0 = !{!2, !2, i64 0}
!1 = !{!"Simple C/C++ TBAA"}
!2 = !{!"vtable pointer", !1}