clang/test/SemaCXX/attr-x86-no_caller_saved_registers.cpp

   1 // RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-linux-gnu -fsyntax-only -verify %s
   2
   3 struct a {
   4   int b __attribute__((no_caller_saved_registers)); // expected-warning {{'no_caller_saved_registers' only applies to function types; type here is 'int'}}
   5   static void foo(int *a) __attribute__((no_caller_saved_registers)) {}
   6 };
   7
   8 struct a test __attribute__((no_caller_saved_registers)); // expected-warning {{'no_caller_saved_registers' only applies to function types; type here is 'struct a'}}
   9
  10 __attribute__((no_caller_saved_registers(999))) void bar(int *) {} // expected-error {{'no_caller_saved_registers' attribute takes no arguments}}
  11
  12 void __attribute__((no_caller_saved_registers)) foo(int *){}
  13
  14 [[gnu::no_caller_saved_registers]] void foo2(int *) {}
  15
  16 typedef __attribute__((no_caller_saved_registers)) void (*foo3)(int *);
  17
  18 int (*foo4)(double a, __attribute__((no_caller_saved_registers)) float b); // expected-warning {{'no_caller_saved_registers' only applies to function types; type here is 'float'}}
  19
  20 typedef void (*foo5)(int *);
  21
  22 void foo6(){} // expected-note {{previous declaration is here}}
  23
  24 void __attribute__((no_caller_saved_registers)) foo6(); // expected-error {{function declared with 'no_caller_saved_registers' attribute was previously declared without the 'no_caller_saved_registers' attribute}}
  25
  26 int main(int argc, char **argv) {
  27   void (*fp)(int *) = foo; // expected-error {{cannot initialize a variable of type 'void (*)(int *)' with an lvalue of type 'void (int *) __attribute__((no_caller_saved_registers))'}}
  28   a::foo(&argc);
  29   foo3 func = foo2;
  30   func(&argc);
  31   foo5 __attribute__((no_caller_saved_registers)) func2 = foo2;
  32   return 0;
  33 }