clang/test/CodeGenCXX/ptr-to-member-function.cpp

   1 // RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm %s -o - | \
   2 // RUN: FileCheck -check-prefix CHECK-LP64 %s
   3 // RUN: %clang_cc1 -triple i386-apple-darwin -std=c++11 -emit-llvm %s -o - | \
   4 // RUN: FileCheck -check-prefix CHECK-LP32 %s
   5 // 13.3.3.2 Ranking implicit conversion sequences
   6
   7 extern "C" int printf(...);
   8
   9 struct A {
  10 int Ai;
  11 bool foo(int* arg) const;
  12 };
  13
  14 bool A::foo(int* arg) const {
  15     printf("A::foo(%d)\n", *arg);
  16     return true;
  17 }
  18
  19 struct B : public A {
  20   void bf() { printf("B::bf called\n"); }
  21 };
  22
  23 struct C : public B { };
  24
  25 // conversion of B::* to C::* is better than conversion of A::* to C::*
  26 typedef void (A::*pmfa)();
  27 typedef void (B::*pmfb)();
  28 typedef void (C::*pmfc)();
  29
  30 struct X {
  31         operator pmfa();
  32         operator pmfb() {
  33           return &B::bf;
  34         }
  35 };
  36
  37
  38 void g(pmfc pm) {
  39   C c;
  40   (c.*pm)();
  41 }
  42
  43 void test2(X x)
  44 {
  45     g(x);
  46 }
  47
  48 struct B1 {
  49   bool (A::*pmf)(int*) const;
  50
  51   B1(int i) : pmf(&A::foo), im(i) {
  52     ((A*)this->*pmf)(&im);
  53   }
  54
  55   int im;
  56 };
  57
  58 int main()
  59 {
  60         X x;
  61         test2(x);
  62         B1 b = B1(1);
  63         B1 c = B1(2);
  64 }
  65
  66 // CHECK-LP64: call { i64, i64 } @_ZN1XcvM1BFvvEEv
  67 // CHECK-LP64: call void @_Z1gM1CFvvE
  68
  69 // CHECK-LP32: call i64 @_ZN1XcvM1BFvvEEv
  70 // CHECK-LP32: call void @_Z1gM1CFvvE