reload1.c (reload): Ignore MEM REG_EQUIV notes if the equivalent is not a valid memory_operand.

	* reload1.c (reload): Ignore MEM REG_EQUIV notes if the equivalent
	is not a valid memory_operand.

From-SVN: r50681

gcc/ChangeLog

+2002-03-12  Ulrich Weigand  <uweigand@de.ibm.com>
+
+	* reload1.c (reload): Ignore MEM REG_EQUIV notes if the equivalent
+	is not a valid memory_operand.
+
 2002-03-12  Bob Wilson  <bob.wilson@acm.org>
 
 	* config/xtensa/xtensa-config.h: Define XCHAL_HAVE_LOOPS.

gcc/reload1.c

@@ -790,7 +790,12 @@ reload (first, global)
 	      i = REGNO (SET_DEST (set));
 	      if (i > LAST_VIRTUAL_REGISTER)
 		{
-		  if (GET_CODE (x) == MEM)
+		  /* It can happen that a REG_EQUIV note contains a MEM
+		     that is not a legitimate memory operand.  As later
+		     stages of reload assume that all addresses found
+		     in the reg_equiv_* arrays were originally legitimate,
+		     we ignore such REG_EQUIV notes.  */
+		  if (memory_operand (x, VOIDmode))
 		    {
 		      /* Always unshare the equivalence, so we can
 			 substitute into this insn without touching the