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Add chibicc
This program popped up on Hacker News recently. It's the only modern compiler I've ever seen that doesn't have dependencies and is easily modified. So I added all of the missing GNU extensions I like to use which means it might be possible soon to build on non-Linux and have third party not vendor gcc binaries.
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commit
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298 changed files with 19493 additions and 11950 deletions
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@ -2,6 +2,14 @@
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#define __attribute__(x)
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#endif
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#ifndef __cplusplus
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#define COSMOPOLITAN_C_START_
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#define COSMOPOLITAN_C_END_
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#define COSMOPOLITAN_CXX_START_
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#define COSMOPOLITAN_CXX_END_
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#define COSMOPOLITAN_CXX_USING_
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#endif
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#if defined(__STRICT_ANSI__) && __STDC_VERSION__ + 0 < 201112
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#define asm __asm__
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#endif
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@ -67,18 +75,6 @@
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} while (0)
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#endif
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#if defined(__STRICT_ANSI__) || \
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(!defined(__GNUC__) && !__has_builtin(constant_p) && \
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!defined(__builtin_constant_p))
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#define __builtin_constant_p(x) 0
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#endif
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#if defined(__STRICT_ANSI__) || \
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(!defined(__GNUC__) && !__has_builtin(choose_expr) && \
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!defined(__builtin_choose_expr))
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#define __builtin_choose_expr(x, a, b) ((x) ? (long)(a) : (long)(b))
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#endif
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#if __STDC_VERSION__ + 0 < 201112
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#define ____Static_assert(x, y) A##B
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#define ___Static_assert(x, y) ____Static_assert(x, y)
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@ -195,7 +191,7 @@ typedef int64_t intmax_t;
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typedef uint64_t uintmax_t;
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#endif
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#ifdef __GNUC__
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#ifndef __chibicc__
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#define va_list __builtin_va_list
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#define va_arg(ap, type) __builtin_va_arg(ap, type)
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#define va_copy(dest, src) __builtin_va_copy(dest, src)
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@ -230,11 +226,11 @@ typedef uint64_t uintmax_t;
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/**
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* Aligns automatic or static variable.
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*/
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#ifndef aligned
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#ifndef forcealign
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#ifndef __STRICT_ANSI__
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#define aligned(bytes) __attribute__((__aligned__(bytes)))
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#define forcealign(bytes) __attribute__((__aligned__(bytes)))
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#else
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#define aligned(bytes)
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#define forcealign(bytes)
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#endif
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#endif
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@ -291,13 +287,13 @@ typedef uint64_t uintmax_t;
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#endif
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#endif
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#ifndef noreturn
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#ifndef wontreturn
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#if !defined(__STRICT_ANSI__) && \
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(__has_attribute(__noreturn__) || \
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(__GNUC__ + 0) * 100 + (__GNUC_MINOR__ + 0) >= 208)
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#define noreturn __attribute__((__noreturn__))
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#define wontreturn __attribute__((__noreturn__))
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#else
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#define noreturn
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#define wontreturn
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#endif
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#endif
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@ -1067,13 +1063,5 @@ typedef uint64_t uintmax_t;
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STATIC_YOINK_SOURCE(__BASE_FILE__);
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#endif
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#ifndef __cplusplus
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#define COSMOPOLITAN_CXX_START_
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#define COSMOPOLITAN_CXX_END_
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#define COSMOPOLITAN_CXX_USING_
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#define COSMOPOLITAN_C_START_
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#define COSMOPOLITAN_C_END_
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#endif
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#define MACHINE_CODE_ANALYSIS_BEGIN_
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#define MACHINE_CODE_ANALYSIS_END_
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@ -1,50 +1,17 @@
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typedef struct {
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unsigned int gp_offset;
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unsigned int fp_offset;
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void *overflow_arg_area;
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void *reg_save_area;
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} __va_elem;
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typedef __va_elem va_list[1];
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#define va_start(ap, last) \
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do { \
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*(ap) = *(__va_elem *)__va_area__; \
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} while (0)
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#define va_end(ap)
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static inline void *__va_arg_mem(__va_elem *ap, int sz, int align) {
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void *p = ap->overflow_arg_area;
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if (align > 8) p = (void *)(((unsigned long)p + 15) / 16 * 16);
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ap->overflow_arg_area = (void *)(((unsigned long)p + sz + 7) / 8 * 8);
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return p;
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}
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static inline void *__va_arg_gp(__va_elem *ap, int sz, int align) {
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if (ap->gp_offset >= 48) return __va_arg_mem(ap, sz, align);
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void *r = ap->reg_save_area + ap->gp_offset;
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ap->gp_offset += 8;
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return r;
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}
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static inline void *__va_arg_fp(__va_elem *ap, int sz, int align) {
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if (ap->fp_offset >= 112) return __va_arg_mem(ap, sz, align);
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void *r = ap->reg_save_area + ap->fp_offset;
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ap->fp_offset += 8;
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return r;
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}
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#define va_arg(ap, ty) \
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({ \
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int klass = __builtin_reg_class(ty); \
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*(ty *)(klass == 0 \
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? __va_arg_gp(ap, sizeof(ty), _Alignof(ty)) \
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: klass == 1 ? __va_arg_fp(ap, sizeof(ty), _Alignof(ty)) \
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: __va_arg_mem(ap, sizeof(ty), _Alignof(ty))); \
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})
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#define va_copy(dest, src) ((dest)[0] = (src)[0])
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#include "libc/runtime/valist.h"
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#define __GNUC_VA_LIST 1
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typedef va_list __gnuc_va_list;
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#define __gnuc_va_list va_list
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#define va_end(AP)
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#define va_copy(DST, SRC) ((DST)[0] = (SRC)[0])
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#define va_start(AP, LAST) \
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do { \
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*(AP) = *(struct __va *)__va_area__; \
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} while (0)
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#define va_arg(AP, TYPE) \
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(*(TYPE *)__va_arg(AP, sizeof(TYPE), _Alignof(TYPE), \
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__builtin_reg_class(TYPE)))
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typedef struct __va va_list[1];
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