File: vptr_read.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 (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}