Vectorize fast path of _cpp_clean_line.

	* configure.ac (AC_C_BIGENDIAN, AC_TYPE_UINTPTR_T): New tests.
	(ssize_t): Check via AC_TYPE_SSIZE_T instead of AC_CHECK_TYPE.
	(ptrdiff_t): Check via AC_CHECK_TYPE.
	* config.in, configure: Rebuild.
	* system.h: Include stdint.h, if available.
	* lex.c (WORDS_BIGENDIAN): Provide default.
	(acc_char_mask_misalign, acc_char_replicate, acc_char_cmp,
	acc_char_index, search_line_acc_char, repl_chars, search_line_mmx,
	search_line_sse2, search_line_sse42, init_vectorized_lexer,
	search_line_fast): New.
	(_cpp_clean_line): Use search_line_fast.  Restructure the fast
	loop to make it clear when we're leaving the loop.  Stay in the
	fast loop for non-trigraph '?'.

Co-Authored-By: Andi Kleen <ak@linux.intel.com>
Co-Authored-By: David S. Miller <davem@davemloft.net>

From-SVN: r163446

libcpp/ChangeLog

+2010-08-21  Richard Henderson  <rth@redhat.com>
+	    Andi Kleen <ak@linux.intel.com>
+	    David S. Miller  <davem@davemloft.net>
+
+	* configure.ac (AC_C_BIGENDIAN, AC_TYPE_UINTPTR_T): New tests.
+	(ssize_t): Check via AC_TYPE_SSIZE_T instead of AC_CHECK_TYPE.
+	(ptrdiff_t): Check via AC_CHECK_TYPE.
+	* config.in, configure: Rebuild.
+	* system.h: Include stdint.h, if available.
+	* lex.c (WORDS_BIGENDIAN): Provide default.
+	(acc_char_mask_misalign, acc_char_replicate, acc_char_cmp,
+	acc_char_index, search_line_acc_char, repl_chars, search_line_mmx,
+	search_line_sse2, search_line_sse42, init_vectorized_lexer,
+	search_line_fast): New.
+	(_cpp_clean_line): Use search_line_fast.  Restructure the fast
+	loop to make it clear when we're leaving the loop.  Stay in the
+	fast loop for non-trigraph '?'.
+
 2010-06-11  Jakub Jelinek  <jakub@redhat.com>
 
 	* include/cpplib.h (struct cpp_callbacks): Add user_builtin_macro

libcpp/config.in

 /* config.in.  Generated from configure.ac by autoheader.  */
 
+/* Define if building universal (internal helper macro) */
+#undef AC_APPLE_UNIVERSAL_BUILD
+
 /* Define to one of `_getb67', `GETB67', `getb67' for Cray-2 and Cray-YMP
    systems. This function is required for `alloca.c' support on those systems.
    */
@@ -209,6 +212,9 @@
 /* Define if <sys/types.h> defines \`uchar'. */
 #undef HAVE_UCHAR
 
+/* Define to 1 if the system has the type `uintptr_t'. */
+#undef HAVE_UINTPTR_T
+
 /* Define to 1 if you have the <unistd.h> header file. */
 #undef HAVE_UNISTD_H
 
@@ -266,6 +272,18 @@
 /* Define to 1 if your <sys/time.h> declares `struct tm'. */
 #undef TM_IN_SYS_TIME
 
+/* Define WORDS_BIGENDIAN to 1 if your processor stores words with the most
+   significant byte first (like Motorola and SPARC, unlike Intel). */
+#if defined AC_APPLE_UNIVERSAL_BUILD
+# if defined __BIG_ENDIAN__
+#  define WORDS_BIGENDIAN 1
+# endif
+#else
+# ifndef WORDS_BIGENDIAN
+#  undef WORDS_BIGENDIAN
+# endif
+#endif
+
 /* Define to empty if `const' does not conform to ANSI C. */
 #undef const
 
@@ -278,8 +296,15 @@
 /* Define to `long int' if <sys/types.h> does not define. */
 #undef off_t
 
+/* Define to `int' if <sys/types.h> does not define. */
+#undef ptrdiff_t
+
 /* Define to `unsigned int' if <sys/types.h> does not define. */
 #undef size_t
 
 /* Define to `int' if <sys/types.h> does not define. */
 #undef ssize_t
+
+/* Define to the type of an unsigned integer type wide enough to hold a
+   pointer, if such a type exists, and if the system does not define it. */
+#undef uintptr_t

libcpp/configure.ac

@@ -70,12 +70,15 @@ else
 fi
 
 # Checks for typedefs, structures, and compiler characteristics.
+AC_C_BIGENDIAN
 AC_C_CONST
 AC_C_INLINE
 AC_FUNC_OBSTACK
 AC_TYPE_OFF_T
 AC_TYPE_SIZE_T
-AC_CHECK_TYPE(ssize_t, int)
+AC_TYPE_SSIZE_T
+AC_TYPE_UINTPTR_T
+AC_CHECK_TYPE(ptrdiff_t, int)
 AC_STRUCT_TM
 AC_CHECK_SIZEOF(int)
 AC_CHECK_SIZEOF(long)

libcpp/system.h

@@ -29,6 +29,9 @@ along with GCC; see the file COPYING3.  If not see
 #ifdef HAVE_STDDEF_H
 # include <stddef.h>
 #endif
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
 
 #include <stdio.h>