diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a8792749288..fa733454d43 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,46 @@
+2000-01-04  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* builtins.c (expand_builtin_strlen): Initialize variable `icode'.
+
+	* calls.c (expand_call): Likewise for
+	`old_stack_arg_under_construction'.
+
+	* cpphash.c (macroexpand): Likewise for `args' and `rest_zero'.
+
+	* function.c (pad_to_arg_alignment): Likewise for `save_var' and
+	`save_constant'.
+
+	* gcc.c (execute): Likewise for `ut' and `st'.
+
+	* genattrtab.c (attr_rtx): Likewise for `rt_val'.
+
+	* genopinit.c (gen_insn): Likewise for `m1', `m2' and `op'.
+
+	* jump.c (jump_optimize_1): Likewise for `temp2'.
+
+	* local-alloc.c (block_alloc): Likewise for `r1'.
+
+	* loop.c (recombine_givs): Likewise for `life_start' and `life_end'.
+
+	* reg-stack.c (check_asm_stack_operands): Likewise for `clobber_reg'.
+	(subst_asm_stack_regs): Likewise for `clobber_reg' and `clobber_loc'.
+	
+	* regmove.c (fixup_match_1): Likewise for `insn_const', `dst_node'
+	and `set2'.
+
+	* reload.c (find_reloads): Likewise for `goal_alternative_number'
+	and `goal_earlyclobber'.
+
+	* scan-decls.c (scan_decls): Likewise for `prev_id_end'.
+
+	* sdbout.c (sdbout_one_type): Likewise for `member_scl'.
+
+	* stupid.c (stupid_life_analysis): Likewise for `chain'.
+
+	* unroll.c (copy_loop_body): Likewise for `copy'.
+
+	* varasm.c (output_constructor): Likewise for `byte'.	
+
 Tue Jan  4 15:34:34 MET 2000  Jan Hubicka  <hubicka@freesoft.cz>
 
 	* i386.c (ix86_expand_move): Allow pushes of memory, offload to memory
diff --git a/gcc/builtins.c b/gcc/builtins.c
index b4c9a8818b5..43e87b19a66 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -1301,7 +1301,7 @@ expand_builtin_strlen (exp, target, mode)
 
       rtx result, src_rtx, char_rtx;
       enum machine_mode insn_mode = value_mode, char_mode;
-      enum insn_code icode;
+      enum insn_code icode = CODE_FOR_nothing;
 
       /* If the length is known, just return it.  */
       if (len != 0)
diff --git a/gcc/calls.c b/gcc/calls.c
index e19f787d334..52fcb94af3c 100644
--- a/gcc/calls.c
+++ b/gcc/calls.c
@@ -1,5 +1,5 @@
 /* Convert function calls to rtl insns, for GNU C compiler.
-   Copyright (C) 1989, 92-97, 1998, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1989, 92-99, 2000 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -1660,7 +1660,7 @@ expand_call (exp, target, ignore)
 #ifdef ACCUMULATE_OUTGOING_ARGS
   int initial_highest_arg_in_use = highest_outgoing_arg_in_use;
   char *initial_stack_usage_map = stack_usage_map;
-  int old_stack_arg_under_construction;
+  int old_stack_arg_under_construction = 0;
 #endif
 
   rtx old_stack_level = 0;
diff --git a/gcc/ch/ChangeLog b/gcc/ch/ChangeLog
index 8dbfbaaa334..0a073e3b1c1 100644
--- a/gcc/ch/ChangeLog
+++ b/gcc/ch/ChangeLog
@@ -1,3 +1,10 @@
+2000-01-04  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* actions.c (update_else_range_for_int_const): Initialize
+	variables `lowval' and `highval'.
+	(update_else_range_for_range): Likewise for `low_range_val' and
+	`high_range_val'.
+
 1999-12-11  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* typeck.c (apply_chill_array_layout, apply_chill_field_layout):
diff --git a/gcc/ch/actions.c b/gcc/ch/actions.c
index de6087c4299..215557b195f 100644
--- a/gcc/ch/actions.c
+++ b/gcc/ch/actions.c
@@ -1,5 +1,5 @@
 /* Implement actions for CHILL.
-   Copyright (C) 1992, 93, 1994, 1998, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1992, 93, 94, 98, 99, 2000 Free Software Foundation, Inc.
    Authors: Per Bothner, Bill Cox, Michael Tiemann, Michael North
 
 This file is part of GNU CC.
@@ -788,7 +788,7 @@ static tree
 update_else_range_for_int_const (else_range, label)
      tree else_range, label;
 {
-  int  lowval, highval;
+  int  lowval = 0, highval = 0;
   int  label_value = TREE_INT_CST_LOW (label);
   tree this_range, prev_range, new_range;
 
@@ -846,7 +846,7 @@ update_else_range_for_range (else_range, low_target, high_target)
      tree else_range, low_target, high_target;
 {
   tree this_range, prev_range, new_range, next_range;
-  int  low_range_val, high_range_val;
+  int  low_range_val = 0, high_range_val = 0;
   int  low_target_val  = TREE_INT_CST_LOW (low_target);
   int  high_target_val = TREE_INT_CST_LOW (high_target);
 
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 173e1ed95dd..c8ff3548406 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,7 @@
+2000-01-04  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* class.c (warn_hidden): Initialize variable `fndecl'.
+
 2000-01-03  Ulrich Drepper  <drepper@cygnus.com>
 
 	* decl.c (flag_isoc9x): New variable to be able to use code in
diff --git a/gcc/cp/class.c b/gcc/cp/class.c
index 86cb92647ab..c2ff295be0d 100644
--- a/gcc/cp/class.c
+++ b/gcc/cp/class.c
@@ -1,5 +1,5 @@
 /* Functions related to building classes and their related objects.
-   Copyright (C) 1987, 92-97, 1998, 1999, 2000 Free Software Foundation, Inc.
+   Copyright (C) 1987, 92-99, 2000 Free Software Foundation, Inc.
    Contributed by Michael Tiemann (tiemann@cygnus.com)
 
 This file is part of GNU CC.
@@ -2930,7 +2930,7 @@ warn_hidden (t)
   for (i = 2; i < n_methods && TREE_VEC_ELT (method_vec, i); ++i)
     {
       tree fns = TREE_VEC_ELT (method_vec, i);
-      tree fndecl;
+      tree fndecl = NULL_TREE;
 
       tree base_fndecls = NULL_TREE;
       tree binfos = BINFO_BASETYPES (TYPE_BINFO (t));
diff --git a/gcc/cpphash.c b/gcc/cpphash.c
index 8c268f455a3..e99e6c70da9 100644
--- a/gcc/cpphash.c
+++ b/gcc/cpphash.c
@@ -1,5 +1,5 @@
 /* Part of CPP library.  (Macro handling.)
-   Copyright (C) 1986, 87, 89, 92-96, 98, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1986, 87, 89, 92-96, 98, 99, 2000 Free Software Foundation, Inc.
    Written by Per Bothner, 1994.
    Based on CCCP program by Paul Rubin, June 1986
    Adapted to ANSI C, Richard Stallman, Jan 1987
@@ -1051,12 +1051,12 @@ macroexpand (pfile, hp)
   register U_CHAR *xbuf;
   long start_line, start_column;
   int xbuf_len;
-  struct argdata *args;
+  struct argdata *args = 0;
   long old_written = CPP_WRITTEN (pfile);
 #if 0
   int start_line = instack[indepth].lineno;
 #endif
-  int rest_args, rest_zero;
+  int rest_args, rest_zero = 0;
   register int i;
 
 #if 0
diff --git a/gcc/function.c b/gcc/function.c
index a551e24e109..d298283ee28 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -1,5 +1,5 @@
 /* Expands front end tree to back end RTL for GNU C-Compiler
-   Copyright (C) 1987, 88, 89, 91-98, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1987, 88, 89, 91-99, 2000 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -5078,8 +5078,8 @@ pad_to_arg_alignment (offset_ptr, boundary, alignment_pad)
      int boundary;
      struct args_size *alignment_pad;
 {
-  tree save_var;
-  HOST_WIDE_INT save_constant;
+  tree save_var = NULL_TREE;
+  HOST_WIDE_INT save_constant = 0;
 
   int boundary_in_bytes = boundary / BITS_PER_UNIT;
   
diff --git a/gcc/gcc.c b/gcc/gcc.c
index 0230b498473..15064ebf66f 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -1,5 +1,5 @@
 /* Compiler driver program that can handle many languages.
-   Copyright (C) 1987, 89, 92-98, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1987, 89, 92-99, 2000 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -2575,7 +2575,7 @@ execute ()
     int ret_code = 0;
 #ifdef HAVE_GETRUSAGE
     struct timeval d;
-    double ut, st;
+    double ut = 0.0, st = 0.0;
 #endif
 
     for (i = 0; i < n_commands; )
diff --git a/gcc/genattrtab.c b/gcc/genattrtab.c
index 3494ad202ba..c164139c94b 100644
--- a/gcc/genattrtab.c
+++ b/gcc/genattrtab.c
@@ -1,5 +1,5 @@
 /* Generate code from machine description to compute values of attributes.
-   Copyright (C) 1991, 93-98, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1991, 93-99, 2000 Free Software Foundation, Inc.
    Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
 
 This file is part of GNU CC.
@@ -542,8 +542,8 @@ attr_rtx VPROTO((enum rtx_code code, ...))
 #endif
   va_list p;
   register int i;		/* Array indices...			*/
-  register const char *fmt;		/* Current rtx's format...		*/
-  register rtx rt_val;		/* RTX to return to caller...		*/
+  register const char *fmt;	/* Current rtx's format...		*/
+  register rtx rt_val = NULL_RTX;/* RTX to return to caller...		*/
   int hashcode;
   register struct attr_hash *h;
   struct obstack *old_obstack = rtl_obstack;
diff --git a/gcc/genopinit.c b/gcc/genopinit.c
index 4f950e5daa8..4022d7e232d 100644
--- a/gcc/genopinit.c
+++ b/gcc/genopinit.c
@@ -1,5 +1,5 @@
 /* Generate code to initialize optabs from machine description.
-   Copyright (C) 1993, 94-98, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1993, 94-99, 2000 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -128,7 +128,7 @@ gen_insn (insn)
      rtx insn;
 {
   char *name = XSTR (insn, 0);
-  int m1, m2, op;
+  int m1 = 0, m2 = 0, op = 0;
   size_t pindex;
   int i;
   const char *np, *pp, *p, *q;
diff --git a/gcc/jump.c b/gcc/jump.c
index 9a2c50e76a2..1e9377124d5 100644
--- a/gcc/jump.c
+++ b/gcc/jump.c
@@ -1,5 +1,5 @@
 /* Optimize jump instructions, for GNU compiler.
-   Copyright (C) 1987, 88, 89, 91-98, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1987, 88, 89, 91-99, 2000 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -309,7 +309,7 @@ jump_optimize_1 (f, cross_jump, noop_moves, after_regscan, mark_labels_only)
       for (insn = f; insn; insn = next)
 	{
 	  rtx reallabelprev;
-	  rtx temp, temp1, temp2, temp3, temp4, temp5, temp6;
+	  rtx temp, temp1, temp2 = NULL_RTX, temp3, temp4, temp5, temp6;
 	  rtx nlabel;
 	  int this_is_simplejump, this_is_condjump, reversep = 0;
 	  int this_is_condjump_in_parallel;
diff --git a/gcc/local-alloc.c b/gcc/local-alloc.c
index e077a12fd48..171b13aa822 100644
--- a/gcc/local-alloc.c
+++ b/gcc/local-alloc.c
@@ -1,5 +1,5 @@
 /* Allocate registers within a basic block, for GNU compiler.
-   Copyright (C) 1987, 88, 91, 93-98, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1987, 88, 91, 93-99, 2000 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -1082,7 +1082,7 @@ block_alloc (b)
 	{
 	  register rtx link, set;
 	  register int win = 0;
-	  register rtx r0, r1;
+	  register rtx r0, r1 = NULL_RTX;
 	  int combined_regno = -1;
 	  int i;
 
diff --git a/gcc/loop.c b/gcc/loop.c
index be02b974348..f25b00abbc8 100644
--- a/gcc/loop.c
+++ b/gcc/loop.c
@@ -1,5 +1,5 @@
 /* Perform various loop optimizations, including strength reduction.
-   Copyright (C) 1987, 88, 89, 91-98, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1987, 88, 89, 91-99, 2000 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -7682,7 +7682,7 @@ recombine_givs (bl, loop_start, loop_end, unroll_p)
      LAST_GIV.  */
   for (i = giv_count - 1; i >= 0; i = rescan)
     {
-      int life_start, life_end;
+      int life_start = 0, life_end = 0;
 
       for (last_giv = 0, rescan = -1; i >= 0; i--)
 	{
diff --git a/gcc/reg-stack.c b/gcc/reg-stack.c
index aa2b01010f6..de4c75a9ee7 100644
--- a/gcc/reg-stack.c
+++ b/gcc/reg-stack.c
@@ -1,5 +1,5 @@
 /* Register to Stack convert for GNU compiler.
-   Copyright (C) 1992, 93-98, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1992, 93-99, 2000 Free Software Foundation, Inc.
 
    This file is part of GNU CC.
 
@@ -589,7 +589,7 @@ check_asm_stack_operands (insn)
   char implicitly_dies[FIRST_PSEUDO_REGISTER];
   int alt;
 
-  rtx *clobber_reg;
+  rtx *clobber_reg = 0;
   int n_inputs, n_outputs;
 
   /* Find out what the constraints require.  If no constraint
@@ -1792,8 +1792,8 @@ subst_asm_stack_regs (insn, regstack)
   rtx **note_loc;		/* Address of REG field of each note */
   enum reg_note *note_kind;	/* The type of each note */
 
-  rtx *clobber_reg;
-  rtx **clobber_loc;
+  rtx *clobber_reg = 0;
+  rtx **clobber_loc = 0;
 
   struct stack_def temp_stack;
   int n_notes;
diff --git a/gcc/regmove.c b/gcc/regmove.c
index 8b2bc0b57c1..810f9d97a84 100644
--- a/gcc/regmove.c
+++ b/gcc/regmove.c
@@ -1,5 +1,5 @@
 /* Move registers around to reduce number of move instructions needed.
-   Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1987, 88, 89, 92-99, 2000 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -1604,9 +1604,9 @@ fixup_match_1 (insn, set, src, src_subreg, dst, backward, operand_number,
   int success = 0;
   int num_calls = 0, s_num_calls = 0;
   enum rtx_code code = NOTE;
-  HOST_WIDE_INT insn_const, newconst;
+  HOST_WIDE_INT insn_const = 0, newconst;
   rtx overlap = 0; /* need to move insn ? */
-  rtx src_note = find_reg_note (insn, REG_DEAD, src), dst_note;
+  rtx src_note = find_reg_note (insn, REG_DEAD, src), dst_note = NULL_RTX;
   int length, s_length;
 
   /* If SRC is marked as unchanging, we may not change it.
@@ -1695,7 +1695,7 @@ fixup_match_1 (insn, set, src, src_subreg, dst, backward, operand_number,
 	  if (! src_note)
 	    {
 	      rtx q;
-	      rtx set2;
+	      rtx set2 = NULL_RTX;
 
 	      /* If an optimization is done, the value of SRC while P
 		 is executed will be changed.  Check that this is OK.  */
@@ -1872,7 +1872,7 @@ fixup_match_1 (insn, set, src, src_subreg, dst, backward, operand_number,
   if (! overlap && (code == PLUS || code == MINUS))
     {
       rtx note = find_reg_note (insn, REG_EQUAL, NULL_RTX);
-      rtx q, set2;
+      rtx q, set2 = NULL_RTX;
       int num_calls2 = 0, s_length2 = 0;
 
       if (note && CONSTANT_P (XEXP (note, 0)))
diff --git a/gcc/reload.c b/gcc/reload.c
index 985fd831f25..3a4d23e43b0 100644
--- a/gcc/reload.c
+++ b/gcc/reload.c
@@ -1,5 +1,5 @@
 /* Search an insn for pseudo regs that must be in hard regs and are not.
-   Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1987, 88, 89, 92-99, 2000 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -2383,7 +2383,7 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p)
   int swapped;
   int goal_alternative[MAX_RECOG_OPERANDS];
   int this_alternative_number;
-  int goal_alternative_number;
+  int goal_alternative_number = 0;
   int operand_reloadnum[MAX_RECOG_OPERANDS];
   int goal_alternative_matches[MAX_RECOG_OPERANDS];
   int goal_alternative_matched[MAX_RECOG_OPERANDS];
@@ -2397,7 +2397,7 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p)
   rtx substed_operand[MAX_RECOG_OPERANDS];
   rtx body = PATTERN (insn);
   rtx set = single_set (insn);
-  int goal_earlyclobber, this_earlyclobber;
+  int goal_earlyclobber = 0, this_earlyclobber;
   enum machine_mode operand_mode[MAX_RECOG_OPERANDS];
   int retval = 0;
 
diff --git a/gcc/scan-decls.c b/gcc/scan-decls.c
index 3dafd342583..13a09ac8faf 100644
--- a/gcc/scan-decls.c
+++ b/gcc/scan-decls.c
@@ -1,5 +1,5 @@
 /* scan-decls.c - Extracts declarations from cpp output.
-   Copyright (C) 1993, 1995, 97-98, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1993, 1995, 97-99, 2000 Free Software Foundation, Inc.
 
 This program is free software; you can redistribute it and/or modify it
 under the terms of the GNU General Public License as published by the
@@ -88,7 +88,7 @@ scan_decls (pfile, argc, argv)
      declarator.  If it is zero, we are either still parsing the
      decl-specs, or prev_id_start marks the start of the declarator.  */
   int declarator_start;
-  int prev_id_start, prev_id_end;
+  int prev_id_start, prev_id_end = 0;
   enum cpp_token token;
 
  new_statement:
diff --git a/gcc/sdbout.c b/gcc/sdbout.c
index 0aebd834d23..e78675f5ebc 100644
--- a/gcc/sdbout.c
+++ b/gcc/sdbout.c
@@ -1,5 +1,5 @@
 /* Output sdb-format symbol table information from GNU compiler.
-   Copyright (C) 1988, 92-97, 1998 Free Software Foundation, Inc.
+   Copyright (C) 1988, 92-99, 2000 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -1173,7 +1173,7 @@ sdbout_one_type (type)
       /* Output a structure type.  */
       {
 	int size = int_size_in_bytes (type);
-	int member_scl;
+	int member_scl = 0;
 	tree tem;
 	int i, n_baseclasses = 0;
 
diff --git a/gcc/stupid.c b/gcc/stupid.c
index 360e024c3fc..a0f328fae20 100644
--- a/gcc/stupid.c
+++ b/gcc/stupid.c
@@ -1,5 +1,5 @@
 /* Dummy data flow analysis for GNU compiler in nonoptimizing mode.
-   Copyright (C) 1987, 91, 94-96, 1998, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1987, 91, 94-96, 98, 99, 2000 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -264,7 +264,7 @@ stupid_life_analysis (f, nregs, file)
   for (insn = last; insn; insn = PREV_INSN (insn))
     {
       register HARD_REG_SET *p = after_insn_hard_regs + INSN_SUID (insn);
-      struct insn_chain *chain;
+      struct insn_chain *chain = 0;
 
       /* Copy the info in regs_live into the element of after_insn_hard_regs
 	 for the current position in the rtl code.  */
diff --git a/gcc/unroll.c b/gcc/unroll.c
index 85d7d11af19..01e5aee43aa 100644
--- a/gcc/unroll.c
+++ b/gcc/unroll.c
@@ -1,5 +1,5 @@
 /* Try to unroll loops, and split induction variables.
-   Copyright (C) 1992, 93, 94, 95, 97, 98, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1992, 93-95, 97-99, 2000 Free Software Foundation, Inc.
    Contributed by James E. Wilson, Cygnus Support/UC Berkeley.
 
 This file is part of GNU CC.
@@ -1692,7 +1692,7 @@ copy_loop_body (copy_start, copy_end, map, exit_label, last_iteration,
      rtx start_label, loop_end, insert_before, copy_notes_from;
 {
   rtx insn, pattern;
-  rtx set, tem, copy;
+  rtx set, tem, copy = NULL_RTX;
   int dest_reg_was_split, i;
 #ifdef HAVE_cc0
   rtx cc0_insn = 0;
diff --git a/gcc/varasm.c b/gcc/varasm.c
index efe2c0605ee..db94c0d8e0e 100644
--- a/gcc/varasm.c
+++ b/gcc/varasm.c
@@ -1,5 +1,5 @@
 /* Output variables, constants and external declarations, for GNU compiler.
-   Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1987, 88, 89, 92-99, 2000 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -4318,7 +4318,7 @@ output_constructor (exp, size)
   int total_bytes = 0;
   /* Non-zero means BYTE contains part of a byte, to be output.  */
   int byte_buffer_in_use = 0;
-  register int byte;
+  register int byte = 0;
 
   if (HOST_BITS_PER_WIDE_INT < BITS_PER_UNIT)
     abort ();