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| author | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2013-06-20 19:40:55 -0500 |
|---|---|---|
| committer | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2013-06-20 19:42:05 -0500 |
| commit | 85c2e6110c9a01ec817c30f1b7e20549d7229987 (patch) | |
| tree | 9b044403d906f9aaa6930484ae6d60dc687ecc19 /include | |
| parent | b8c792af85fe3ff65c0cd68e2f291072a60cd953 (diff) | |
| download | glibc-85c2e6110c9a01ec817c30f1b7e20549d7229987.tar.gz | |
Fix loop construction to functions calls
Check wheter the compiler has the option -fno-tree-loop-distribute-patterns
to inhibit loop transformation to library calls and uses it on memset
and memmove default implementation to avoid recursive calls.
Diffstat (limited to 'include')
| -rw-r--r-- | include/libc-symbols.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/libc-symbols.h b/include/libc-symbols.h index f043ce0850..a3b6274bad 100644 --- a/include/libc-symbols.h +++ b/include/libc-symbols.h @@ -782,4 +782,14 @@ for linking") #define libc_ifunc_hidden_def(name) \ libc_ifunc_hidden_def1 (__GI_##name, name) +/* Add the compiler optimization to inhibit loop transformation to library + calls. This is used to avoid recursive calls in memset and memmove + default implementations. */ +#ifdef HAVE_CC_INHIBIT_LOOP_TO_LIBCALL +# define inhibit_loop_to_libcall \ + __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) +#else +# define inhibit_loop_to_libcall +#endif + #endif /* libc-symbols.h */ |