clang/test/CodeGenCXX/convert-to-fptr.cpp

   1 // RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm %s -o - | \
   2 // RUN: FileCheck %s
   3 // RUN: %clang_cc1 -triple i386-apple-darwin -std=c++11 -emit-llvm %s -o - | \
   4 // RUN: FileCheck %s
   5
   6 extern "C" int printf(...);
   7
   8 int f1(int arg)  { return arg; };
   9
  10 int f2(float arg) { return int(arg); };
  11
  12 typedef int (*fp1)(int);
  13
  14 typedef int (*fp2)(float);
  15
  16 struct A {
  17   operator fp1() { return f1; }
  18   operator fp2() { return f2; }
  19 } a;
  20
  21
  22 // Test for function reference.
  23 typedef int (&fr1)(int);
  24 typedef int (&fr2)(float);
  25
  26 struct B {
  27   operator fr1() { return f1; }
  28   operator fr2() { return f2; }
  29 } b;
  30
  31 int main()
  32 {
  33  int i = a(10); // Calls f1 via pointer returned from conversion function
  34  printf("i = %d\n", i);
  35
  36  int j = b(20); // Calls f1 via pointer returned from conversion function
  37  printf("j = %d\n", j);
  38  return 0;
  39 }
  40
  41 // CHECK: call noundef ptr @_ZN1AcvPFiiEEv
  42 // CHECK: call noundef nonnull ptr @_ZN1BcvRFiiEEv