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Introduce "COLDFUNC" function attribute.

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* include/ruby/defines.h: introduce "COLDFUNC" function attribute
  on several compilers for called unlikely functions.
  Apply to rb_memerror, rb_warn and rb_bug.

  A patch form  methodmissing <lourens@bearmetal.eu>.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66228 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
ko1 2018-12-05 17:23:32 +00:00
parent 756914e57e
commit eb79191f16
3 changed files with 13 additions and 3 deletions
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10
include/ruby/defines.h
View file

@ -89,6 +89,16 @@ extern "C" {
#define RB_UNLIKELY(x) (x)
#endif /* __GNUC__ >= 3 */
/*
cold attribute for code layout improvements
RUBY_FUNC_ATTRIBUTE not used because MSVC does not like nested func macros
*/
#if defined(__clang__) || GCC_VERSION_SINCE(4, 3, 0)
#define COLDFUNC __attribute__((cold))
#else
#define COLDFUNC
#endif
#ifdef __GNUC__
#if defined __MINGW_PRINTF_FORMAT
#define PRINTF_ARGS(decl, string_index, first_to_check) \

2
include/ruby/intern.h
View file

@ -479,7 +479,7 @@ VALUE rb_file_directory_p(VALUE,VALUE);
VALUE rb_str_encode_ospath(VALUE);
int rb_is_absolute_path(const char *);
/* gc.c */
NORETURN(void rb_memerror(void));
COLDFUNC NORETURN(void rb_memerror(void));
PUREFUNC(int rb_during_gc(void));
void rb_gc_mark_locations(const VALUE*, const VALUE*);
void rb_mark_tbl(struct st_table*);

4
include/ruby/ruby.h
View file

@ -1901,7 +1901,7 @@ enum rb_io_wait_readwrite {RB_IO_WAIT_READABLE, RB_IO_WAIT_WRITABLE};
PRINTF_ARGS(NORETURN(void rb_raise(VALUE, const char*, ...)), 2, 3);
PRINTF_ARGS(NORETURN(void rb_fatal(const char*, ...)), 1, 2);
PRINTF_ARGS(NORETURN(void rb_bug(const char*, ...)), 1, 2);
COLDFUNC PRINTF_ARGS(NORETURN(void rb_bug(const char*, ...)), 1, 2);
NORETURN(void rb_bug_errno(const char*, int));
NORETURN(void rb_sys_fail(const char*));
NORETURN(void rb_sys_fail_str(VALUE));
@ -1925,7 +1925,7 @@ PRINTF_ARGS(void rb_warning(const char*, ...), 1, 2);
PRINTF_ARGS(void rb_compile_warning(const char *, int, const char*, ...), 3, 4);
PRINTF_ARGS(void rb_sys_warning(const char*, ...), 1, 2);
/* reports always */
PRINTF_ARGS(void rb_warn(const char*, ...), 1, 2);
COLDFUNC PRINTF_ARGS(void rb_warn(const char*, ...), 1, 2);
PRINTF_ARGS(void rb_compile_warn(const char *, int, const char*, ...), 3, 4);
#define RUBY_BLOCK_CALL_FUNC_TAKES_BLOCKARG 1