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authorAdhemerval Zanella <azanella@linux.vnet.ibm.com>2013-06-20 19:40:55 -0500
committerAdhemerval Zanella <azanella@linux.vnet.ibm.com>2013-06-20 19:42:05 -0500
commit85c2e6110c9a01ec817c30f1b7e20549d7229987 (patch)
tree9b044403d906f9aaa6930484ae6d60dc687ecc19 /include
parentb8c792af85fe3ff65c0cd68e2f291072a60cd953 (diff)
downloadglibc-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.h10
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 */