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Uninitialized variables
- To: egcs-patches at egcs dot cygnus dot com
- Subject: Uninitialized variables
- From: Toshiyasu Morita <tm at netcom dot com>
- Date: Fri, 9 Apr 1999 02:52:58 -0700 (PDT)
gcc emits many warnings about uninitialized variables while bootstrapping.
This patch fixes a few of them - I'll try to keep working on it.
Compiler appears to be successfully bootstrapping on i386-linux (so far)
with these changes.
Fri Apr 9 Fri Apr 9 1999 Toshiyasu Morita (tm@netcom.com)
fold-const.c (make_range): Ensure variables initialized.
(fold): Same.
function.c (fixup_var_refs_insns): Same.
(instantiate_virtual_regs_1): Same.
optabs.c (expand_binop): Same.
stmt.c (expand_end_case): Same.
*** fold-const.c.bak Fri Apr 9 01:51:22 1999
--- fold-const.c Fri Apr 9 01:52:25 1999
*************** make_range (exp, pin_p, plow, phigh)
*** 3109,3115 ****
tree *plow, *phigh;
{
enum tree_code code;
! tree arg0, arg1, type = NULL_TREE;
tree orig_type = NULL_TREE;
int in_p, n_in_p;
tree low, high, n_low, n_high;
--- 3109,3115 ----
tree *plow, *phigh;
{
enum tree_code code;
! 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;
*************** fold (expr)
*** 4767,4773 ****
if (TREE_CODE (arg0) == MULT_EXPR && TREE_CODE (arg1) == MULT_EXPR)
{
tree arg00, arg01, arg10, arg11;
! tree alt0, alt1, same;
/* (A * C) + (B * C) -> (A+B) * C.
We are most concerned about the case where C is a constant,
--- 4767,4773 ----
if (TREE_CODE (arg0) == MULT_EXPR && TREE_CODE (arg1) == MULT_EXPR)
{
tree arg00, arg01, arg10, arg11;
! 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,
*** function.c.bak Fri Apr 9 01:52:57 1999
--- function.c Fri Apr 9 01:53:43 1999
*************** fixup_var_refs_insns (var, promoted_mode
*** 1818,1824 ****
struct hash_table *ht;
{
rtx call_dest = 0;
! rtx insn_list;
/* If we already know which INSNs reference VAR there's no need
to walk the entire instruction chain. */
--- 1818,1824 ----
struct hash_table *ht;
{
rtx call_dest = 0;
! rtx insn_list = NULL_RTX;
/* If we already know which INSNs reference VAR there's no need
to walk the entire instruction chain. */
*************** instantiate_virtual_regs_1 (loc, object,
*** 3640,3646 ****
rtx x;
RTX_CODE code;
rtx new = 0;
! HOST_WIDE_INT offset;
rtx temp;
rtx seq;
int i, j;
--- 3640,3646 ----
rtx x;
RTX_CODE code;
rtx new = 0;
! HOST_WIDE_INT offset = 0;
rtx temp;
rtx seq;
int i, j;
*** optabs.c.bak Fri Apr 9 02:03:34 1999
--- optabs.c Fri Apr 9 02:04:20 1999
*************** expand_binop (mode, binoptab, op0, op1,
*** 897,903 ****
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 xop0, xop1;
/* We can handle either a 1 or -1 value for the carry. If STORE_FLAG
--- 897,903 ----
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 = NULL_RTX, carry_out = NULL_RTX;
rtx xop0, xop1;
/* We can handle either a 1 or -1 value for the carry. If STORE_FLAG
*************** expand_binop (mode, binoptab, op0, op1,
*** 1067,1074 ****
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;
/* If the target is the same as one of the inputs, don't use it. This
prevents problems with the REG_EQUAL note. */
--- 1067,1074 ----
rtx op1_high = operand_subword_force (op1, high, mode);
rtx op1_low = operand_subword_force (op1, low, mode);
rtx product = 0;
! 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. */
*** stmt.c.bak Fri Apr 9 02:02:43 1999
--- stmt.c Fri Apr 9 02:03:12 1999
***************
*** 5024,5030 ****
expand_end_case (orig_index)
tree orig_index;
{
! tree minval, maxval, range, orig_minval;
rtx default_label = 0;
register struct case_node *n;
unsigned int count;
--- 5024,5030 ----
expand_end_case (orig_index)
tree orig_index;
{
! tree minval = NULL_TREE, maxval = NULL_TREE, range, orig_minval;
rtx default_label = 0;
register struct case_node *n;
unsigned int count;