Mercurial > hg > octave-lojdl > gnulib-hg
changeset 16715:be14d9f76493
Enable common subexpression optimization in GCC.
* lib/dirent.in.h (_GL_ATTRIBUTE_PURE): Define, like in string.in.h.
(alphasort): Declare with GCC attribute 'pure'.
* lib/stdlib.in.h (_GL_ATTRIBUTE_PURE): Define, like in string.in.h.
(atoll): Declare with GCC attribute 'pure'.
* lib/string.in.h (mbslen, mbsnlen, mbschr, mbsrchr, mbsstr,
mbscasecmp, mbsncasecmp, mbspcasecmp, mbscasestr, mbscspn, mbspbrk,
mbsspn, strverscmp): Declare with GCC attribute 'pure'.
* lib/wchar.in.h (_GL_ATTRIBUTE_PURE): Define, like in string.in.h.
(btowc, wctob, wcwidth, wmemchr, wmemcmp, wcslen, wcsnlen, wcscmp,
wcsncmp, wcscasecmp, wcsncasecmp, wcschr, wcsrchr, wcscspn, wcsspn,
wcspbrk, wcsstr, wcswidth): Declare with GCC attribute 'pure'.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Sun, 25 Mar 2012 01:56:10 +0100 |
| parents | 2e2bf6c7bf38 |
| children | 079fb1e73828 |
| files | ChangeLog lib/dirent.in.h lib/stdlib.in.h lib/string.in.h lib/wchar.in.h |
| diffstat | 5 files changed, 101 insertions(+), 25 deletions(-) [+] |
line wrap: on
line diff
--- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,18 @@ +2012-03-24 Bruno Haible <bruno@clisp.org> + + Enable common subexpression optimization in GCC. + * lib/dirent.in.h (_GL_ATTRIBUTE_PURE): Define, like in string.in.h. + (alphasort): Declare with GCC attribute 'pure'. + * lib/stdlib.in.h (_GL_ATTRIBUTE_PURE): Define, like in string.in.h. + (atoll): Declare with GCC attribute 'pure'. + * lib/string.in.h (mbslen, mbsnlen, mbschr, mbsrchr, mbsstr, + mbscasecmp, mbsncasecmp, mbspcasecmp, mbscasestr, mbscspn, mbspbrk, + mbsspn, strverscmp): Declare with GCC attribute 'pure'. + * lib/wchar.in.h (_GL_ATTRIBUTE_PURE): Define, like in string.in.h. + (btowc, wctob, wcwidth, wmemchr, wmemcmp, wcslen, wcsnlen, wcscmp, + wcsncmp, wcscasecmp, wcsncasecmp, wcschr, wcsrchr, wcscspn, wcsspn, + wcspbrk, wcsstr, wcswidth): Declare with GCC attribute 'pure'. + 2012-03-24 Bruno Haible <bruno@clisp.org> gnulib-tool: Avoid unintended error output from 'cmp'.
--- a/lib/dirent.in.h +++ b/lib/dirent.in.h @@ -55,6 +55,14 @@ # endif #endif +/* The __attribute__ feature is available in gcc versions 2.5 and later. + The attribute __pure__ was added in gcc 2.96. */ +#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) +# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__)) +#else +# define _GL_ATTRIBUTE_PURE /* empty */ +#endif + /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */ /* The definition of _GL_ARG_NONNULL is copied here. */ @@ -229,6 +237,7 @@ # if !@HAVE_ALPHASORT@ _GL_FUNCDECL_SYS (alphasort, int, (const struct dirent **, const struct dirent **) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1, 2))); # endif /* Need to cast, because on glibc systems, the parameters are
--- a/lib/stdlib.in.h +++ b/lib/stdlib.in.h @@ -94,6 +94,14 @@ # include <unistd.h> #endif +/* The __attribute__ feature is available in gcc versions 2.5 and later. + The attribute __pure__ was added in gcc 2.96. */ +#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) +# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__)) +#else +# define _GL_ATTRIBUTE_PURE /* empty */ +#endif + /* The definition of _Noreturn is copied here. */ /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */ @@ -138,7 +146,9 @@ /* Parse a signed decimal integer. Returns the value of the integer. Errors are not detected. */ # if !@HAVE_ATOLL@ -_GL_FUNCDECL_SYS (atoll, long long, (const char *string) _GL_ARG_NONNULL ((1))); +_GL_FUNCDECL_SYS (atoll, long long, (const char *string) + _GL_ATTRIBUTE_PURE + _GL_ARG_NONNULL ((1))); # endif _GL_CXXALIAS_SYS (atoll, long long, (const char *string)); _GL_CXXALIASWARN (atoll);
--- a/lib/string.in.h +++ b/lib/string.in.h @@ -724,10 +724,14 @@ # if !(defined __cplusplus && defined GNULIB_NAMESPACE) # define mbslen rpl_mbslen # endif -_GL_FUNCDECL_RPL (mbslen, size_t, (const char *string) _GL_ARG_NONNULL ((1))); +_GL_FUNCDECL_RPL (mbslen, size_t, (const char *string) + _GL_ATTRIBUTE_PURE + _GL_ARG_NONNULL ((1))); _GL_CXXALIAS_RPL (mbslen, size_t, (const char *string)); # else -_GL_FUNCDECL_SYS (mbslen, size_t, (const char *string) _GL_ARG_NONNULL ((1))); +_GL_FUNCDECL_SYS (mbslen, size_t, (const char *string) + _GL_ATTRIBUTE_PURE + _GL_ARG_NONNULL ((1))); _GL_CXXALIAS_SYS (mbslen, size_t, (const char *string)); # endif _GL_CXXALIASWARN (mbslen); @@ -737,6 +741,7 @@ /* Return the number of multibyte characters in the character string starting at STRING and ending at STRING + LEN. */ _GL_EXTERN_C size_t mbsnlen (const char *string, size_t len) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1)); #endif @@ -750,10 +755,12 @@ # define mbschr rpl_mbschr /* avoid collision with HP-UX function */ # endif _GL_FUNCDECL_RPL (mbschr, char *, (const char *string, int c) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1))); _GL_CXXALIAS_RPL (mbschr, char *, (const char *string, int c)); # else _GL_FUNCDECL_SYS (mbschr, char *, (const char *string, int c) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1))); _GL_CXXALIAS_SYS (mbschr, char *, (const char *string, int c)); # endif @@ -770,10 +777,12 @@ # define mbsrchr rpl_mbsrchr /* avoid collision with system function */ # endif _GL_FUNCDECL_RPL (mbsrchr, char *, (const char *string, int c) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1))); _GL_CXXALIAS_RPL (mbsrchr, char *, (const char *string, int c)); # else _GL_FUNCDECL_SYS (mbsrchr, char *, (const char *string, int c) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1))); _GL_CXXALIAS_SYS (mbsrchr, char *, (const char *string, int c)); # endif @@ -786,6 +795,7 @@ Unlike strstr(), this function works correctly in multibyte locales with encodings different from UTF-8. */ _GL_EXTERN_C char * mbsstr (const char *haystack, const char *needle) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1, 2)); #endif @@ -797,6 +807,7 @@ different lengths! Unlike strcasecmp(), this function works correctly in multibyte locales. */ _GL_EXTERN_C int mbscasecmp (const char *s1, const char *s2) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1, 2)); #endif @@ -811,6 +822,7 @@ Unlike strncasecmp(), this function works correctly in multibyte locales. But beware that N is not a byte count but a character count! */ _GL_EXTERN_C int mbsncasecmp (const char *s1, const char *s2, size_t n) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1, 2)); #endif @@ -824,6 +836,7 @@ Unlike strncasecmp(), this function works correctly in multibyte locales. */ _GL_EXTERN_C char * mbspcasecmp (const char *string, const char *prefix) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1, 2)); #endif @@ -834,6 +847,7 @@ strlen (haystack) < strlen (needle) ! Unlike strcasestr(), this function works correctly in multibyte locales. */ _GL_EXTERN_C char * mbscasestr (const char *haystack, const char *needle) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1, 2)); #endif @@ -844,6 +858,7 @@ if none exists. Unlike strcspn(), this function works correctly in multibyte locales. */ _GL_EXTERN_C size_t mbscspn (const char *string, const char *accept) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1, 2)); #endif @@ -857,10 +872,12 @@ # define mbspbrk rpl_mbspbrk /* avoid collision with HP-UX function */ # endif _GL_FUNCDECL_RPL (mbspbrk, char *, (const char *string, const char *accept) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1, 2))); _GL_CXXALIAS_RPL (mbspbrk, char *, (const char *string, const char *accept)); # else _GL_FUNCDECL_SYS (mbspbrk, char *, (const char *string, const char *accept) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1, 2))); _GL_CXXALIAS_SYS (mbspbrk, char *, (const char *string, const char *accept)); # endif @@ -874,6 +891,7 @@ if none exists. Unlike strspn(), this function works correctly in multibyte locales. */ _GL_EXTERN_C size_t mbsspn (const char *string, const char *reject) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1, 2)); #endif @@ -993,6 +1011,7 @@ #if @GNULIB_STRVERSCMP@ # if !@HAVE_STRVERSCMP@ _GL_FUNCDECL_SYS (strverscmp, int, (const char *, const char *) + _GL_ATTRIBUTE_PURE _GL_ARG_NONNULL ((1, 2))); # endif _GL_CXXALIAS_SYS (strverscmp, int, (const char *, const char *));
--- a/lib/wchar.in.h +++ b/lib/wchar.in.h @@ -83,6 +83,14 @@ #ifndef _@GUARD_PREFIX@_WCHAR_H #define _@GUARD_PREFIX@_WCHAR_H +/* The __attribute__ feature is available in gcc versions 2.5 and later. + The attribute __pure__ was added in gcc 2.96. */ +#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) +# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__)) +#else +# define _GL_ATTRIBUTE_PURE /* empty */ +#endif + /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */ /* The definition of _GL_ARG_NONNULL is copied here. */ @@ -135,11 +143,11 @@ # undef btowc # define btowc rpl_btowc # endif -_GL_FUNCDECL_RPL (btowc, wint_t, (int c)); +_GL_FUNCDECL_RPL (btowc, wint_t, (int c) _GL_ATTRIBUTE_PURE); _GL_CXXALIAS_RPL (btowc, wint_t, (int c)); # else # if !@HAVE_BTOWC@ -_GL_FUNCDECL_SYS (btowc, wint_t, (int c)); +_GL_FUNCDECL_SYS (btowc, wint_t, (int c) _GL_ATTRIBUTE_PURE); # endif _GL_CXXALIAS_SYS (btowc, wint_t, (int c)); # endif @@ -160,12 +168,12 @@ # undef wctob # define wctob rpl_wctob # endif -_GL_FUNCDECL_RPL (wctob, int, (wint_t wc)); +_GL_FUNCDECL_RPL (wctob, int, (wint_t wc) _GL_ATTRIBUTE_PURE); _GL_CXXALIAS_RPL (wctob, int, (wint_t wc)); # else # if !defined wctob && !@HAVE_DECL_WCTOB@ /* wctob is provided by gnulib, or wctob exists but is not declared. */ -_GL_FUNCDECL_SYS (wctob, int, (wint_t wc)); +_GL_FUNCDECL_SYS (wctob, int, (wint_t wc) _GL_ATTRIBUTE_PURE); # endif _GL_CXXALIAS_SYS (wctob, int, (wint_t wc)); # endif @@ -426,12 +434,12 @@ # undef wcwidth # define wcwidth rpl_wcwidth # endif -_GL_FUNCDECL_RPL (wcwidth, int, (wchar_t)); +_GL_FUNCDECL_RPL (wcwidth, int, (wchar_t) _GL_ATTRIBUTE_PURE); _GL_CXXALIAS_RPL (wcwidth, int, (wchar_t)); # else # if !@HAVE_DECL_WCWIDTH@ /* wcwidth exists but is not declared. */ -_GL_FUNCDECL_SYS (wcwidth, int, (wchar_t)); +_GL_FUNCDECL_SYS (wcwidth, int, (wchar_t) _GL_ATTRIBUTE_PURE); # endif _GL_CXXALIAS_SYS (wcwidth, int, (wchar_t)); # endif @@ -448,7 +456,8 @@ /* Search N wide characters of S for C. */ #if @GNULIB_WMEMCHR@ # if !@HAVE_WMEMCHR@ -_GL_FUNCDECL_SYS (wmemchr, wchar_t *, (const wchar_t *s, wchar_t c, size_t n)); +_GL_FUNCDECL_SYS (wmemchr, wchar_t *, (const wchar_t *s, wchar_t c, size_t n) + _GL_ATTRIBUTE_PURE); # endif /* On some systems, this function is defined as an overloaded function: extern "C++" { @@ -479,7 +488,8 @@ #if @GNULIB_WMEMCMP@ # if !@HAVE_WMEMCMP@ _GL_FUNCDECL_SYS (wmemcmp, int, - (const wchar_t *s1, const wchar_t *s2, size_t n)); + (const wchar_t *s1, const wchar_t *s2, size_t n) + _GL_ATTRIBUTE_PURE); # endif _GL_CXXALIAS_SYS (wmemcmp, int, (const wchar_t *s1, const wchar_t *s2, size_t n)); @@ -549,7 +559,7 @@ /* Return the number of wide characters in S. */ #if @GNULIB_WCSLEN@ # if !@HAVE_WCSLEN@ -_GL_FUNCDECL_SYS (wcslen, size_t, (const wchar_t *s)); +_GL_FUNCDECL_SYS (wcslen, size_t, (const wchar_t *s) _GL_ATTRIBUTE_PURE); # endif _GL_CXXALIAS_SYS (wcslen, size_t, (const wchar_t *s)); _GL_CXXALIASWARN (wcslen); @@ -565,7 +575,8 @@ /* Return the number of wide characters in S, but at most MAXLEN. */ #if @GNULIB_WCSNLEN@ # if !@HAVE_WCSNLEN@ -_GL_FUNCDECL_SYS (wcsnlen, size_t, (const wchar_t *s, size_t maxlen)); +_GL_FUNCDECL_SYS (wcsnlen, size_t, (const wchar_t *s, size_t maxlen) + _GL_ATTRIBUTE_PURE); # endif _GL_CXXALIAS_SYS (wcsnlen, size_t, (const wchar_t *s, size_t maxlen)); _GL_CXXALIASWARN (wcsnlen); @@ -684,7 +695,8 @@ /* Compare S1 and S2. */ #if @GNULIB_WCSCMP@ # if !@HAVE_WCSCMP@ -_GL_FUNCDECL_SYS (wcscmp, int, (const wchar_t *s1, const wchar_t *s2)); +_GL_FUNCDECL_SYS (wcscmp, int, (const wchar_t *s1, const wchar_t *s2) + _GL_ATTRIBUTE_PURE); # endif _GL_CXXALIAS_SYS (wcscmp, int, (const wchar_t *s1, const wchar_t *s2)); _GL_CXXALIASWARN (wcscmp); @@ -701,7 +713,8 @@ #if @GNULIB_WCSNCMP@ # if !@HAVE_WCSNCMP@ _GL_FUNCDECL_SYS (wcsncmp, int, - (const wchar_t *s1, const wchar_t *s2, size_t n)); + (const wchar_t *s1, const wchar_t *s2, size_t n) + _GL_ATTRIBUTE_PURE); # endif _GL_CXXALIAS_SYS (wcsncmp, int, (const wchar_t *s1, const wchar_t *s2, size_t n)); @@ -718,7 +731,8 @@ /* Compare S1 and S2, ignoring case. */ #if @GNULIB_WCSCASECMP@ # if !@HAVE_WCSCASECMP@ -_GL_FUNCDECL_SYS (wcscasecmp, int, (const wchar_t *s1, const wchar_t *s2)); +_GL_FUNCDECL_SYS (wcscasecmp, int, (const wchar_t *s1, const wchar_t *s2) + _GL_ATTRIBUTE_PURE); # endif _GL_CXXALIAS_SYS (wcscasecmp, int, (const wchar_t *s1, const wchar_t *s2)); _GL_CXXALIASWARN (wcscasecmp); @@ -735,7 +749,8 @@ #if @GNULIB_WCSNCASECMP@ # if !@HAVE_WCSNCASECMP@ _GL_FUNCDECL_SYS (wcsncasecmp, int, - (const wchar_t *s1, const wchar_t *s2, size_t n)); + (const wchar_t *s1, const wchar_t *s2, size_t n) + _GL_ATTRIBUTE_PURE); # endif _GL_CXXALIAS_SYS (wcsncasecmp, int, (const wchar_t *s1, const wchar_t *s2, size_t n)); @@ -803,7 +818,8 @@ /* Find the first occurrence of WC in WCS. */ #if @GNULIB_WCSCHR@ # if !@HAVE_WCSCHR@ -_GL_FUNCDECL_SYS (wcschr, wchar_t *, (const wchar_t *wcs, wchar_t wc)); +_GL_FUNCDECL_SYS (wcschr, wchar_t *, (const wchar_t *wcs, wchar_t wc) + _GL_ATTRIBUTE_PURE); # endif /* On some systems, this function is defined as an overloaded function: extern "C++" { @@ -832,7 +848,8 @@ /* Find the last occurrence of WC in WCS. */ #if @GNULIB_WCSRCHR@ # if !@HAVE_WCSRCHR@ -_GL_FUNCDECL_SYS (wcsrchr, wchar_t *, (const wchar_t *wcs, wchar_t wc)); +_GL_FUNCDECL_SYS (wcsrchr, wchar_t *, (const wchar_t *wcs, wchar_t wc) + _GL_ATTRIBUTE_PURE); # endif /* On some systems, this function is defined as an overloaded function: extern "C++" { @@ -862,7 +879,8 @@ of wide characters not in REJECT. */ #if @GNULIB_WCSCSPN@ # if !@HAVE_WCSCSPN@ -_GL_FUNCDECL_SYS (wcscspn, size_t, (const wchar_t *wcs, const wchar_t *reject)); +_GL_FUNCDECL_SYS (wcscspn, size_t, (const wchar_t *wcs, const wchar_t *reject) + _GL_ATTRIBUTE_PURE); # endif _GL_CXXALIAS_SYS (wcscspn, size_t, (const wchar_t *wcs, const wchar_t *reject)); _GL_CXXALIASWARN (wcscspn); @@ -879,7 +897,8 @@ of wide characters in ACCEPT. */ #if @GNULIB_WCSSPN@ # if !@HAVE_WCSSPN@ -_GL_FUNCDECL_SYS (wcsspn, size_t, (const wchar_t *wcs, const wchar_t *accept)); +_GL_FUNCDECL_SYS (wcsspn, size_t, (const wchar_t *wcs, const wchar_t *accept) + _GL_ATTRIBUTE_PURE); # endif _GL_CXXALIAS_SYS (wcsspn, size_t, (const wchar_t *wcs, const wchar_t *accept)); _GL_CXXALIASWARN (wcsspn); @@ -896,7 +915,8 @@ #if @GNULIB_WCSPBRK@ # if !@HAVE_WCSPBRK@ _GL_FUNCDECL_SYS (wcspbrk, wchar_t *, - (const wchar_t *wcs, const wchar_t *accept)); + (const wchar_t *wcs, const wchar_t *accept) + _GL_ATTRIBUTE_PURE); # endif /* On some systems, this function is defined as an overloaded function: extern "C++" { @@ -928,7 +948,8 @@ #if @GNULIB_WCSSTR@ # if !@HAVE_WCSSTR@ _GL_FUNCDECL_SYS (wcsstr, wchar_t *, - (const wchar_t *haystack, const wchar_t *needle)); + (const wchar_t *haystack, const wchar_t *needle) + _GL_ATTRIBUTE_PURE); # endif /* On some systems, this function is defined as an overloaded function: extern "C++" { @@ -982,11 +1003,13 @@ # undef wcswidth # define wcswidth rpl_wcswidth # endif -_GL_FUNCDECL_RPL (wcswidth, int, (const wchar_t *s, size_t n)); +_GL_FUNCDECL_RPL (wcswidth, int, (const wchar_t *s, size_t n) + _GL_ATTRIBUTE_PURE); _GL_CXXALIAS_RPL (wcswidth, int, (const wchar_t *s, size_t n)); # else # if !@HAVE_WCSWIDTH@ -_GL_FUNCDECL_SYS (wcswidth, int, (const wchar_t *s, size_t n)); +_GL_FUNCDECL_SYS (wcswidth, int, (const wchar_t *s, size_t n) + _GL_ATTRIBUTE_PURE); # endif _GL_CXXALIAS_SYS (wcswidth, int, (const wchar_t *s, size_t n)); # endif