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| author | Paul Eggert <eggert@cs.ucla.edu> | 2021-01-22 11:45:38 -0800 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2021-01-22 12:02:55 -0800 |
| commit | a900e641fa1fd765799f12a7f699f768ebfccfe8 (patch) | |
| tree | a874eba952d3e51190a2bfe26cfe6c1635e9fda1 /lib/free.c | |
| parent | 9143eba0c6861f467c18bc52d66e6f5c573be56b (diff) | |
| download | emacs-a900e641fa1fd765799f12a7f699f768ebfccfe8.tar.gz emacs-a900e641fa1fd765799f12a7f699f768ebfccfe8.tar.bz2 emacs-a900e641fa1fd765799f12a7f699f768ebfccfe8.zip | |
Update from Gnulib by running admin/merge-gnulib
Diffstat (limited to 'lib/free.c')
| -rw-r--r-- | lib/free.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/free.c b/lib/free.c index 135c3eb16bc..5c89787aba1 100644 --- a/lib/free.c +++ b/lib/free.c @@ -27,7 +27,21 @@ void rpl_free (void *p) #undef free { +#if defined __GNUC__ && !defined __clang__ + /* An invalid GCC optimization + <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98396> + would optimize away the assignments in the code below, when link-time + optimization (LTO) is enabled. Make the code more complicated, so that + GCC does not grok how to optimize it. */ + int err[2]; + err[0] = errno; + err[1] = errno; + errno = 0; + free (p); + errno = err[errno == 0]; +#else int err = errno; free (p); errno = err; +#endif } |