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llvm-mirror/test/Instrumentation/ThreadSanitizer/vptr_read.ll
Dmitry Vyukov eae8006130 tsan: handle vptr loads specially
This is required to determine ctor/dtor vs virtual call races.
http://llvm-reviews.chandlerc.com/D566

llvm-svn: 177717
2013-03-22 08:51:22 +00:00

14 lines
512 B
LLVM

; 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 {
entry:
; CHECK: call void @__tsan_vptr_read
%0 = load i8* %a, align 8, !tbaa !0
ret i8 %0
}
!0 = metadata !{metadata !"vtable pointer", metadata !1}
!1 = metadata !{metadata !"Simple C/C++ TBAA", null}