re PR target/36898 (Insufficient qp-mutex declarations)

2010-10-18  Steve Ellcey  <sje@cup.hp.com>

	PR target/36898
	PR middle-end/43760
	* config/ia64/ia64.c (rws_access_regno): Remove predicate check.

From-SVN: r165664

gcc/ChangeLog

+2010-10-18  Steve Ellcey  <sje@cup.hp.com>
+
+	PR target/36898
+	PR middle-end/43760
+	* config/ia64/ia64.c (rws_access_regno): Remove predicate check.
+
 2010-10-18  Joseph Myers  <joseph@codesourcery.com>
 
 	* config/i386/i386.c (ix86_option_override_internal): Define and

gcc/config/ia64/ia64.c

@@ -5875,15 +5875,14 @@ rws_access_regno (int regno, struct reg_flags flags, int pred)
 	  break;
 
 	case 1:
-	  /* The register has been written via a predicate.  If this is
-	     not a complementary predicate, then we need a barrier.  */
-	  /* ??? This assumes that P and P+1 are always complementary
-	     predicates for P even.  */
+	  /* The register has been written via a predicate.  Treat
+	     it like a unconditional write and do not try to check
+	     for complementary pred reg in earlier write.  */
 	  if (flags.is_and && rws_sum[regno].written_by_and)
 	    ;
 	  else if (flags.is_or && rws_sum[regno].written_by_or)
 	    ;
-	  else if ((rws_sum[regno].first_pred ^ 1) != pred)
+	  else
 	    need_barrier = 1;
 	  if (!in_safe_group_barrier)
 	    rws_update (regno, flags, pred);
@@ -5944,12 +5943,9 @@ rws_access_regno (int regno, struct reg_flags flags, int pred)
 	  break;
 
 	case 1:
-	  /* The register has been written via a predicate.  If this is
-	     not a complementary predicate, then we need a barrier.  */
-	  /* ??? This assumes that P and P+1 are always complementary
-	     predicates for P even.  */
-	  if ((rws_sum[regno].first_pred ^ 1) != pred)
-	    need_barrier = 1;
+	  /* The register has been written via a predicate, assume we
+	     need a barrier (don't check for complementary regs).  */
+	  need_barrier = 1;
 	  break;
 
 	case 2: