Files
clang-p2996/clang/test/Sema/implicit-ms-builtin-decl.c
Aaron Ballman 8c5edb59cf Use functions with prototypes when appropriate; NFC
A significant number of our tests in C accidentally use functions
without prototypes. This patch converts the function signatures to have
a prototype for the situations where the test is not specific to K&R C
declarations. e.g.,

  void func();

becomes

  void func(void);

This is the second batch of tests being updated (there are a significant
number of other tests left to be updated).
2022-02-04 15:20:36 -05:00

45 lines
1.8 KiB
C

// RUN: %clang_cc1 -triple x86_64-unknown-unknown -fsyntax-only -verify %s -fms-extensions
// RUN: %clang_cc1 -triple i386-unknown-unknown -fsyntax-only -verify %s -fms-extensions
void f(void) {
(void)_byteswap_ushort(42); // expected-warning{{implicitly declaring library function '_byteswap_ushort'}} \
// expected-note{{include the header <stdlib.h> or explicitly provide a declaration for '_byteswap_ushort'}}
(void)_byteswap_uint64(42LL); // expected-warning{{implicitly declaring library function '_byteswap_uint64'}} \
// expected-note{{include the header <stdlib.h> or explicitly provide a declaration for '_byteswap_uint64'}}
}
void _byteswap_ulong(void); // expected-warning{{incompatible redeclaration of library function '_byteswap_ulong'}} \
// expected-note{{'_byteswap_ulong' is a builtin}}
unsigned short _byteswap_ushort(unsigned short);
unsigned long long _byteswap_uint64(unsigned long long);
void g(void) {
(void)_byteswap_ushort(42);
(void)_byteswap_uint64(42LL);
}
#if defined(__x86_64__)
void h(void) {
(void)__mulh(21, 2); // expected-warning{{implicitly declaring library function '__mulh'}} \
// expected-note{{include the header <intrin.h> or explicitly provide a declaration for '__mulh'}}
(void)__umulh(21, 2); // expected-warning{{implicitly declaring library function '__umulh'}} \
// expected-note{{include the header <intrin.h> or explicitly provide a declaration for '__umulh'}}
}
long long __mulh(long long, long long);
unsigned long long __umulh(unsigned long long, unsigned long long);
void i(void) {
(void)__mulh(21, 2);
(void)__umulh(21, 2);
}
#endif
#if defined(i386)
void h(void) {
(void)__mulh(21LL, 2LL); // expected-warning{{implicit declaration of function '__mulh' is invalid}}
(void)__umulh(21ULL, 2ULL); // expected-warning{{implicit declaration of function '__umulh' is invalid}}
}
#endif