clang/test/Sema/implicit-ms-builtin-decl.c

   1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -fsyntax-only -verify %s -fms-extensions
   2 // RUN: %clang_cc1 -triple i386-unknown-unknown -fsyntax-only -verify %s -fms-extensions
   3
   4 void f(void) {
   5   (void)_byteswap_ushort(42); // expected-error{{call to undeclared library function '_byteswap_ushort'}} \
   6   // expected-note{{include the header <stdlib.h> or explicitly provide a declaration for '_byteswap_ushort'}}
   7   (void)_byteswap_uint64(42LL); // expected-error{{call to undeclared library function '_byteswap_uint64'}} \
   8   // expected-note{{include the header <stdlib.h> or explicitly provide a declaration for '_byteswap_uint64'}}
   9 }
  10
  11 void _byteswap_ulong(void); // expected-warning{{incompatible redeclaration of library function '_byteswap_ulong'}} \
  12 // expected-note{{'_byteswap_ulong' is a builtin}}
  13
  14 unsigned short _byteswap_ushort(unsigned short);
  15 unsigned long long _byteswap_uint64(unsigned long long);
  16
  17 void g(void) {
  18   (void)_byteswap_ushort(42);
  19   (void)_byteswap_uint64(42LL);
  20 }
  21
  22 #if defined(__x86_64__)
  23 void h(void) {
  24   (void)__mulh(21, 2);  // expected-error{{call to undeclared library function '__mulh'}} \
  25   // expected-note{{include the header <intrin.h> or explicitly provide a declaration for '__mulh'}}
  26   (void)__umulh(21, 2); // expected-error{{call to undeclared library function '__umulh'}} \
  27   // expected-note{{include the header <intrin.h> or explicitly provide a declaration for '__umulh'}}
  28 }
  29
  30 long long __mulh(long long, long long);
  31 unsigned long long __umulh(unsigned long long, unsigned long long);
  32
  33 void i(void) {
  34   (void)__mulh(21, 2);
  35   (void)__umulh(21, 2);
  36 }
  37 #endif
  38
  39 #if defined(i386)
  40 void h(void) {
  41   (void)__mulh(21LL, 2LL);  // expected-error{{call to undeclared function '__mulh'; ISO C99 and later do not support implicit function declarations}}
  42   (void)__umulh(21ULL, 2ULL);  // expected-error{{call to undeclared function '__umulh'; ISO C99 and later do not support implicit function declarations}}
  43 }
  44 #endif