recog.c (preprocess_constraints): Only zero those elements of recog_op_alt that…

recog.c (preprocess_constraints): Only zero those elements of recog_op_alt that are needed for this insn.

* recog.c (preprocess_constraints): Only zero those elements of
recog_op_alt that are needed for this insn.
* arm.c (note_invalid_constants): A function can't contain invalid
constants if it has no constraints.

From-SVN: r73855

gcc/ChangeLog

+2003-11-23  Richard Earnshaw  <rearnsha@arm.com>
+
+	* recog.c (preprocess_constraints): Only zero those elements of
+	recog_op_alt that are needed for this insn.
+	* arm.c (note_invalid_constants): A function can't contain invalid
+	constants if it has no constraints.
+
 2003-11-22  Jan Hubicka  <jh@suse.cz>
 
 	* i386.c (classify_argument): Pass __float128 in memory.

gcc/config/arm/arm.c

@@ -6908,6 +6908,9 @@ note_invalid_constants (rtx insn, HOST_WIDE_INT address, int do_pushes)
   if (!constrain_operands (1))
     fatal_insn_not_found (insn);
 
+  if (recog_data.n_alternatives == 0)
+    return false;
+
   /* Fill in recog_op_alt with information about the constraints of this insn.  */
   preprocess_constraints ();
 

gcc/recog.c

@@ -2093,7 +2093,10 @@ preprocess_constraints (void)
 {
   int i;
 
-  memset (recog_op_alt, 0, sizeof recog_op_alt);
+  for (i = 0; i < recog_data.n_operands; i++)
+    memset (recog_op_alt[i], 0, (recog_data.n_alternatives
+				 * sizeof (struct operand_alternative)));
+
   for (i = 0; i < recog_data.n_operands; i++)
     {
       int j;