+2013-06-20 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
+
+ * config.h.in (HAVE_CC_INHIBIT_LOOP_TO_LIBCALL): New define.
+ * configure.in (libc_cv_cc_loop_to_function): Check if compiler
+ accepts -fno-tree-loop-distribute-patterns.
+ * include/libc-symbols.h (inhibit_loop_to_libcall): New macro.
+ * string/memmove.c (MEMMOVE): Disable loop transformation to avoid
+ recursive call.
+ * string/memset.c (memset): Likewise.
+ * string/test-memmove.c (simple_memmove): Disable loop transformation
+ to library calls.
+ * string/test-memset.c (simple_memset): Likewise.
+ * benchtests/bench-memmove.c (simple_memmove): Likewise.
+ * benchtests/bench-memset.c (simple_memset): Likewise.
+ * configure: Regenerated.
+
2013-06-20 Joseph Myers <joseph@codesourcery.com>
* math/test-misc.c (main): Ignore fesetround failure when failures
#endif
char *
+inhibit_loop_to_libcall
simple_memmove (char *dst, const char *src, size_t n)
{
char *ret = dst;
#endif
char *
+inhibit_loop_to_libcall
simple_memset (char *s, int c, size_t n)
{
char *r = s, *end = s + n;
/* Define if the compiler supports __builtin_memset. */
#undef HAVE_BUILTIN_MEMSET
+/* Define if compiler accepts -ftree-loop-distribute-patterns. */
+#undef HAVE_CC_INHIBIT_LOOP_TO_LIBCALL
+
/* Define if the regparm attribute shall be used for local functions
(gcc on ix86 only). */
#undef USE_REGPARMS
have_libcap
have_libaudit
LIBGD
+libc_cv_cc_loop_to_function
libc_cv_cc_submachine
libc_cv_cc_nofma
exceptions
fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if $CC accepts -fno-tree-loop-distribute-patterns with \
+__attribute__ ((__optimize__))" >&5
+$as_echo_n "checking if $CC accepts -fno-tree-loop-distribute-patterns with \
+__attribute__ ((__optimize__))... " >&6; }
+if ${libc_cv_cc_loop_to_function+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat > conftest.c <<EOF
+void
+__attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
+foo (void) {}
+EOF
+libc_cv_cc_loop_to_function=no
+if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c'
+ { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; }
+then
+ libc_cv_cc_loop_to_function=yes
+fi
+rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_loop_to_function" >&5
+$as_echo "$libc_cv_cc_loop_to_function" >&6; }
+if test $libc_cv_cc_loop_to_function = yes; then
+ $as_echo "#define HAVE_CC_INHIBIT_LOOP_TO_LIBCALL 1" >>confdefs.h
+
+fi
+
+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for libgd" >&5
$as_echo_n "checking for libgd... " >&6; }
if test "$with_gd" != "no"; then
fi
AC_SUBST(libc_cv_cc_submachine)
+AC_CACHE_CHECK(if $CC accepts -fno-tree-loop-distribute-patterns with \
+__attribute__ ((__optimize__)), libc_cv_cc_loop_to_function, [dnl
+cat > conftest.c <<EOF
+void
+__attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
+foo (void) {}
+EOF
+libc_cv_cc_loop_to_function=no
+if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c])
+then
+ libc_cv_cc_loop_to_function=yes
+fi
+rm -f conftest*])
+if test $libc_cv_cc_loop_to_function = yes; then
+ AC_DEFINE(HAVE_CC_INHIBIT_LOOP_TO_LIBCALL)
+fi
+AC_SUBST(libc_cv_cc_loop_to_function)
+
dnl Check whether we have the gd library available.
AC_MSG_CHECKING(for libgd)
if test "$with_gd" != "no"; then
#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 */
#endif
rettype
+inhibit_loop_to_libcall
MEMMOVE (a1, a2, len)
a1const void *a1;
a2const void *a2;
#undef memset
void *
+inhibit_loop_to_libcall
memset (dstpp, c, len)
void *dstpp;
int c;
#endif
char *
+inhibit_loop_to_libcall
simple_memmove (char *dst, const char *src, size_t n)
{
char *ret = dst;
#endif
char *
+inhibit_loop_to_libcall
simple_memset (char *s, int c, size_t n)
{
char *r = s, *end = s + n;