configure.ac (HAVE_AS_IX86_REP_LOCK_PREFIX): Also require that the assembler…

configure.ac (HAVE_AS_IX86_REP_LOCK_PREFIX): Also require that the assembler accept 'rep bsf ...'...

	* configure.ac (HAVE_AS_IX86_REP_LOCK_PREFIX): Also require that the
	assembler accept 'rep bsf ...', 'rep bsr ...', 'rep ret' and 'rep nop'.
	* configure: Regenerated.
	* config/i386/i386.md (simple_return_internal_long): Use %;
	(ctz<mode>2): Likewise.
	(*pause): Likewise.

From-SVN: r189193

gcc/ChangeLog

+2012-07-03  Roland McGrath  <mcgrathr@google.com>
+
+	* configure.ac (HAVE_AS_IX86_REP_LOCK_PREFIX): Also require that the
+	assembler accept 'rep bsf ...', 'rep bsr ...', 'rep ret' and 'rep nop'.
+	* configure: Regenerated.
+	* config/i386/i386.md (simple_return_internal_long): Use %;
+	(ctz<mode>2): Likewise.
+	(*pause): Likewise.
+
 2012-07-02  Oleg Endo  <olegendo@gcc.gnu.org>
 
 	PR target/51244
@@ -30,8 +39,7 @@
 	(gen_inbound_check): Do not release post-dominator info here.
 	(process_switch): Reorder code.  Expand as bit tests if it
 	looks like a win.
-	(do_switchconv): Release post-dominator info here if something
-	changed.
+	(do_switchconv): Release post-dominator info here if something changed.
 	(struct gimple_opt_pass): Verify more.
 	* tree.h (expand_switch_using_bit_tests_p): Remove prototype.
 
@@ -55,8 +63,7 @@
 	(graphite-poly.o): Likewise.
 	* configure.ac: Declare ISL vars instead of PPL ones.
 	* configure: Regenerated.
-	* doc/install.texi: Replace PPL requirement documentation
-	with ISL one.
+	* doc/install.texi: Replace PPL requirement documentation with ISL one.
 	* graphite-blocking.c: Remove PPL code, add ISL equivalent.
 	* graphite-clast-to-gimple.c: Likewise.
 	* graphite-dependences.c: Likewise.
@@ -199,8 +206,7 @@
 2012-06-29  Jakub Jelinek  <jakub@redhat.com>
 
 	* tree-vect-generic.c (expand_vector_divmod): For even/odd
-	widening multiply, put even always as first argument to
-	VEC_PERM_EXPR.
+	widening multiply, put even always as first argument to VEC_PERM_EXPR.
 
 2012-06-29  Richard Henderson  <rth@redhat.com>
 

gcc/config/i386/i386.md

@@ -11904,7 +11904,7 @@
   [(simple_return)
    (unspec [(const_int 0)] UNSPEC_REP)]
   "reload_completed"
-  "rep\;ret"
+  "rep%; ret"
   [(set_attr "length" "2")
    (set_attr "atom_unit" "jeu")
    (set_attr "length_immediate" "0")
@@ -12236,8 +12236,8 @@
   else if (optimize_function_for_size_p (cfun))
     ;
   else if (TARGET_GENERIC)
-    /* tzcnt expands to rep;bsf and we can use it even if !TARGET_BMI.  */
-    return "rep; bsf{<imodesuffix>}\t{%1, %0|%0, %1}";
+    /* tzcnt expands to 'rep bsf' and we can use it even if !TARGET_BMI.  */
+    return "rep%; bsf{<imodesuffix>}\t{%1, %0|%0, %1}";
 
   return "bsf{<imodesuffix>}\t{%1, %0|%0, %1}";
 }
@@ -18131,7 +18131,7 @@
   [(set (match_operand:BLK 0)
 	(unspec:BLK [(match_dup 0)] UNSPEC_PAUSE))]
   ""
-  "rep; nop"
+  "rep%; nop"
   [(set_attr "length" "2")
    (set_attr "memory" "unknown")])
 

gcc/configure

@@ -24790,6 +24790,10 @@ else
   gcc_cv_as_ix86_rep_lock_prefix=no
   if test x$gcc_cv_as != x; then
     $as_echo 'rep movsl
+	 rep ret
+	 rep nop
+	 rep bsf %ecx, %eax
+	 rep bsr %ecx, %eax
 	 lock addl %edi, (%eax,%esi)
 	 lock orl $0, (%esp)' > conftest.s
     if { ac_try='$gcc_cv_as $gcc_cv_as_flags  -o conftest.o conftest.s >&5'

gcc/configure.ac

@@ -3641,6 +3641,10 @@ foo:	nop
     gcc_GAS_CHECK_FEATURE([rep and lock prefix],
         gcc_cv_as_ix86_rep_lock_prefix,,,
 	[rep movsl
+	 rep ret
+	 rep nop
+	 rep bsf %ecx, %eax
+	 rep bsr %ecx, %eax
 	 lock addl %edi, (%eax,%esi)
 	 lock orl $0, (%esp)],,
         [AC_DEFINE(HAVE_AS_IX86_REP_LOCK_PREFIX, 1,