clang/test/Sema/varargs-x86-64.c

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s -triple x86_64-apple-darwin9
   2
   3 void f1(void) {
   4   const __builtin_va_list args2;
   5   (void)__builtin_va_arg(args2, int); // expected-error {{first argument to 'va_arg' is of type 'const __builtin_va_list' and not 'va_list'}}
   6 }
   7
   8 void f2(int a, ...) {
   9   __builtin_ms_va_list ap;
  10   __builtin_ms_va_start(ap, a); // expected-error {{'__builtin_ms_va_start' used in System V ABI function}}
  11 }
  12
  13 void __attribute__((ms_abi)) g1(int a) {
  14   __builtin_ms_va_list ap;
  15
  16   __builtin_ms_va_start(ap, a, a); // expected-error {{too many arguments to function}}
  17   __builtin_ms_va_start(ap, a); // expected-error {{'va_start' used in function with fixed args}}
  18 }
  19
  20 void __attribute__((ms_abi)) g2(int a, int b, ...) {
  21   __builtin_ms_va_list ap;
  22
  23   __builtin_ms_va_start(ap, 10); // expected-warning {{second argument to 'va_start' is not the last named parameter}}
  24   __builtin_ms_va_start(ap, a); // expected-warning {{second argument to 'va_start' is not the last named parameter}}
  25   __builtin_ms_va_start(ap, b);
  26 }
  27
  28 void __attribute__((ms_abi)) g3(float a, ...) { // expected-note 2{{parameter of type 'float' is declared here}}
  29   __builtin_ms_va_list ap;
  30
  31   __builtin_ms_va_start(ap, a); // expected-warning {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}}
  32   __builtin_ms_va_start(ap, (a)); // expected-warning {{passing an object that undergoes default argument promotion to 'va_start' has undefined behavior}}
  33 }
  34
  35 void __attribute__((ms_abi)) g5(void) {
  36   __builtin_ms_va_list ap;
  37   __builtin_ms_va_start(ap, ap); // expected-error {{'va_start' used in function with fixed args}}
  38 }
  39
  40 void __attribute__((ms_abi)) g6(int a, ...) {
  41   __builtin_ms_va_list ap;
  42   __builtin_ms_va_start(ap); // expected-error {{too few arguments to function}}
  43 }
  44
  45 void __attribute__((ms_abi))
  46 bar(__builtin_ms_va_list authors, ...) {
  47   __builtin_ms_va_start(authors, authors);
  48   (void)__builtin_va_arg(authors, int);
  49   __builtin_ms_va_end(authors);
  50 }
  51
  52 void __attribute__((ms_abi)) g7(int a, ...) {
  53   __builtin_ms_va_list ap;
  54   __builtin_ms_va_start(ap, a);
  55   // FIXME: This error message is sub-par.
  56   __builtin_va_arg(ap, int) = 1; // expected-error {{expression is not assignable}}
  57   int *x = &__builtin_va_arg(ap, int); // expected-error {{cannot take the address of an rvalue}}
  58   __builtin_ms_va_end(ap);
  59 }
  60
  61 void __attribute__((ms_abi)) g8(int a, ...) {
  62   __builtin_ms_va_list ap;
  63   __builtin_ms_va_start(ap, a);
  64   (void)__builtin_va_arg(ap, void); // expected-error {{second argument to 'va_arg' is of incomplete type 'void'}}
  65   __builtin_ms_va_end(ap);
  66 }
  67
  68 enum E { x = -1, y = 2, z = 10000 };
  69 void __attribute__((ms_abi)) g9(__builtin_ms_va_list args) {
  70   (void)__builtin_va_arg(args, float); // expected-warning {{second argument to 'va_arg' is of promotable type 'float'}}
  71   (void)__builtin_va_arg(args, enum E); // no-warning
  72   (void)__builtin_va_arg(args, short); // expected-warning {{second argument to 'va_arg' is of promotable type 'short'}}
  73   (void)__builtin_va_arg(args, char); // expected-warning {{second argument to 'va_arg' is of promotable type 'char'}}
  74 }
  75
  76 void __attribute__((ms_abi)) g10(int a, ...) {
  77   __builtin_va_list ap;
  78   __builtin_va_start(ap, a); // expected-error {{'va_start' used in Win64 ABI function}}
  79 }