fold-const.c (make_range): Always initialize arg0 and arg1.

        * fold-const.c (make_range): Always initialize arg0 and arg1.
        (fold): Simlarly for alt0 and alt1.
        * function.c (fixup_var_refs_insns): Initialize insn_list.
        (instantiate_virtual_regs_1): Initialize offset.
        * optabs.c (expand_binop): Initialize carry_in, carry_out, op0_xhigh
        and op1_xhigh.
        * stmt.c (expand_end_case): Initialize minval and maxval.

From-SVN: r26632

gcc/ChangeLog

+Mon Apr 26 01:08:36 1999  Toshiyasu Morita  (tm@netcom.com)
+
+	* fold-const.c (make_range): Always initialize arg0 and arg1.
+	(fold): Simlarly for alt0 and alt1.
+	* function.c (fixup_var_refs_insns): Initialize insn_list.
+	(instantiate_virtual_regs_1): Initialize offset.
+	* optabs.c (expand_binop): Initialize carry_in, carry_out, op0_xhigh
+	and op1_xhigh.
+	* stmt.c (expand_end_case): Initialize minval and maxval.
+
 Mon Apr 26 01:02:34 1999  Nathan Sidwell  <nathan@acm.org>
 
 	* toplev.c (report_error_function): Reorder file stack and

gcc/fold-const.c

@@ -3109,7 +3109,7 @@ make_range (exp, pin_p, plow, phigh)
      tree *plow, *phigh;
 {
   enum tree_code code;
-  tree arg0, arg1, type = NULL_TREE;
+  tree arg0 = NULL_TREE, arg1 = NULL_TREE, type = NULL_TREE;
   tree orig_type = NULL_TREE;
   int in_p, n_in_p;
   tree low, high, n_low, n_high;
@@ -4767,7 +4767,7 @@ fold (expr)
 	  if (TREE_CODE (arg0) == MULT_EXPR && TREE_CODE (arg1) == MULT_EXPR)
 	    {
 	      tree arg00, arg01, arg10, arg11;
-	      tree alt0, alt1, same;
+	      tree alt0 = NULL_TREE, alt1 = NULL_TREE, same;
 
 	      /* (A * C) + (B * C) -> (A+B) * C.
 		 We are most concerned about the case where C is a constant,

gcc/function.c

@@ -1827,7 +1827,7 @@ fixup_var_refs_insns (var, promoted_mode, unsignedp, insn, toplevel, ht)
      struct hash_table *ht;
 {
   rtx call_dest = 0;
-  rtx insn_list;
+  rtx insn_list = NULL_RTX;
 
   /* If we already know which INSNs reference VAR there's no need
      to walk the entire instruction chain.  */
@@ -3649,7 +3649,7 @@ instantiate_virtual_regs_1 (loc, object, extra_insns)
   rtx x;
   RTX_CODE code;
   rtx new = 0;
-  HOST_WIDE_INT offset;
+  HOST_WIDE_INT offset = 0;
   rtx temp;
   rtx seq;
   int i, j;

gcc/optabs.c

@@ -898,7 +898,7 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods)
       rtx carry_tmp = gen_reg_rtx (word_mode);
       optab otheroptab = binoptab == add_optab ? sub_optab : add_optab;
       int nwords = GET_MODE_BITSIZE (mode) / BITS_PER_WORD;
-      rtx carry_in, carry_out;
+      rtx carry_in = NULL_RTX, carry_out = NULL_RTX;
       rtx xop0, xop1;
 
       /* We can handle either a 1 or -1 value for the carry.  If STORE_FLAG
@@ -1068,8 +1068,8 @@ expand_binop (mode, binoptab, op0, op1, target, unsignedp, methods)
       rtx op1_high = operand_subword_force (op1, high, mode);
       rtx op1_low = operand_subword_force (op1, low, mode);
       rtx product = 0;
-      rtx op0_xhigh;
-      rtx op1_xhigh;
+      rtx op0_xhigh = NULL_RTX;
+      rtx op1_xhigh = NULL_RTX;
 
       /* If the target is the same as one of the inputs, don't use it.  This
 	 prevents problems with the REG_EQUAL note.  */

gcc/stmt.c

@@ -5037,7 +5037,7 @@ void
 expand_end_case (orig_index)
      tree orig_index;
 {
-  tree minval, maxval, range, orig_minval;
+  tree minval = NULL_TREE, maxval = NULL_TREE, range, orig_minval;
   rtx default_label = 0;
   register struct case_node *n;
   unsigned int count;