File: chain-implicit-definition.cpp

package info (click to toggle)
llvm-toolchain-9 1%3A9.0.1-16.1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 882,388 kB
  • sloc: cpp: 4,167,636; ansic: 714,256; asm: 457,610; python: 155,927; objc: 65,094; sh: 42,856; lisp: 26,908; perl: 7,786; pascal: 7,722; makefile: 6,881; ml: 5,581; awk: 3,648; cs: 2,027; xml: 888; javascript: 381; ruby: 156
file content (39 lines) | stat: -rw-r--r-- 780 bytes parent folder | download | duplicates (40)
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
31
32
33
34
35
36
37
38
39
// no PCH
// RUN: %clang_cc1 -emit-llvm-only -include %s -include %s %s
// with PCH
// RUN: %clang_cc1 -emit-llvm-only -chain-include %s -chain-include %s %s
#if !defined(PASS1)
#define PASS1

// A base with a virtual dtor.
struct A {
  virtual ~A();
};

// A derived class with an implicit virtual dtor.
struct B : A {
  // Key function to suppress vtable definition.
  virtual void virt();
};

#elif !defined(PASS2)
#define PASS2

// Further derived class that requires ~B().
// Causes definition of ~B(), but it was lost when saving PCH.
struct C : B {
  C();
  ~C() {}
};

#else

void foo() {
  // Variable that requires ~C().
  C c;
}

// VTable placement would again cause definition of ~B(), hiding the bug,
// if not for B::virt(), which suppresses the placement.

#endif