Manuel Sainz de Baranda y Goñi
33ad474c45
[Clang] Add predefined macros for integer constants ( #123514 )
...
This adds predefined macros for integer constants to implement section 7.18.4 of ISO/IEC 9899:1999 in `<stdint.h>` in a safe way:
```
__INT8_C(c)
__INT16_C(c)
__INT32_C(c)
__INT64_C(c)
__INTMAX_C(c)
__UINT8_C(c)
__UINT16_C(c)
__UINT32_C(c)
__UINT64_C(c)
__UINTMAX_C(c)
```
Which improves compatibility with GCC and makes it trivial to implement
section 7.18.4 of ISO/IEC 9899:1999.
Clang defines `__INT<N>_C_SUFFIX__`, `__UINT<N>_C_SUFFIX__`,
`__INTAX_C_SUFFIX__` and `__UINTMAX_C_SUFFIX__`, but these macros are
useless for this purpose.
Let's say, for example, that `__INT64_C_SUFFIX__` expands to `L` or
`LL`. If the user defines them as a macros, the compiler will produce
errors if `INT64_C` is implemented in `<stdint.h>` using
`__INT64_C_SUFFIX__`:
**minimal-test.c:**
```cpp
#if defined(__clang__) & !defined(__INT64_C)
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wreserved-identifier"
# define __PSTDC_INT_C_(literal, suffix) literal##suffix
# define __PSTDC_INT_C(literal, suffix) __PSTDC_INT_C_(literal, suffix)
# define INT64_C(literal) __PSTDC_INT_C(literal, __INT64_C_SUFFIX__)
# pragma clang diagnostic pop
#elif defined(__GNUC__)
# define INT64_C __INT64_C
#endif
typedef __INT64_TYPE__ int64_t;
#define L "Make Clang produce an error"
#define LL "Make Clang produce an error"
int main(int argc, char **argv)
{
(void)argc; (void)argv;
int64_t v = INT64_C(9223372036854775807);
(void)v;
return 0;
}
```
<img width="697" alt="imagen"
src="https://github.com/user-attachments/assets/6df97af6-7cfd-4cf9-85b7-d7c854509325 "
/>
**test.c:**
```cpp
#if defined(__clang__) && !defined(__INT8_C)
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wreserved-identifier"
# define __PSTDC_INT_C_(literal, suffix) literal##suffix
# define __PSTDC_INT_C(literal, suffix) __PSTDC_INT_C_(literal, suffix)
# define INT8_C(literal) __PSTDC_INT_C(literal, __INT8_C_SUFFIX__)
# define INT16_C(literal) __PSTDC_INT_C(literal, __INT16_C_SUFFIX__)
# define INT32_C(literal) __PSTDC_INT_C(literal, __INT32_C_SUFFIX__)
# define INT64_C(literal) __PSTDC_INT_C(literal, __INT64_C_SUFFIX__)
# define INTMAX_C(literal) __PSTDC_INT_C(literal, __INTMAX_C_SUFFIX__)
# define UINT8_C(literal) __PSTDC_INT_C(literal, __UINT8_C_SUFFIX__)
# define UINT16_C(literal) __PSTDC_INT_C(literal, __UINT16_C_SUFFIX__)
# define UINT32_C(literal) __PSTDC_INT_C(literal, __UINT32_C_SUFFIX__)
# define UINT64_C(literal) __PSTDC_INT_C(literal, __UINT64_C_SUFFIX__)
# define UINTMAX_C(literal) __PSTDC_INT_C(literal, __UINTMAX_C_SUFFIX__)
# pragma clang diagnostic pop
#else
# define INT8_C __INT8_C
# define INT16_C __INT16_C
# define INT32_C __INT32_C
# define INT64_C __INT64_C
# define INTMAX_C __INTMAX_C
# define UINT8_C __UINT8_C
# define UINT16_C __UINT16_C
# define UINT32_C __UINT32_C
# define UINT64_C __UINT64_C
# define UINTMAX_C __UINTMAX_C
#endif
typedef __INT8_TYPE__ int8_t;
typedef __INT16_TYPE__ int16_t;
typedef __INT32_TYPE__ int32_t;
typedef __INT64_TYPE__ int64_t;
typedef __INTMAX_TYPE__ intmax_t;
typedef __UINT8_TYPE__ uint8_t;
typedef __UINT16_TYPE__ uint16_t;
typedef __UINT32_TYPE__ uint32_t;
typedef __UINT64_TYPE__ uint64_t;
typedef __UINTMAX_TYPE__ uintmax_t;
#define L "Make Clang produce an error"
#define LL "Make Clang produce an error"
#define U "Make Clang produce an error"
#define UL "Make Clang produce an error"
#define ULL "Make Clang produce an error"
int main(int argc, char **argv)
{
(void)argc; (void)argv;
int8_t a = INT8_C (127);
int16_t b = INT16_C (32767);
int32_t c = INT32_C (2147483647);
int64_t d = INT64_C (9223372036854775807);
intmax_t e = INTMAX_C (9223372036854775807);
uint8_t f = UINT8_C (255);
uint16_t g = UINT16_C (65535);
uint32_t h = UINT32_C (4294967295);
uint64_t i = UINT64_C (18446744073709551615);
uintmax_t j = UINTMAX_C(18446744073709551615);
(void)a; (void)b; (void)c; (void)d; (void)e;
(void)f; (void)g; (void)h; (void)i; (void)j;
return 0;
}
```
2025-01-26 16:48:42 +01:00
Zi Xuan Wu
97e496054a
[Clang][CSKY] Add the CSKY target and compiler driver
...
Add CSKY target toolchains to support csky in linux and elf environment.
It can leverage the basic universal Linux toolchain for linux environment, and only add some compile or link parameters.
For elf environment, add a CSKYToolChain to support compile and link.
Also add some parameters into basic codebase of clang driver.
Differential Revision: https://reviews.llvm.org/D121445
2022-04-06 11:37:37 +08:00
Manuel Sainz de Baranda y Goñi