[tree-ssa] Mainline merge as of 2003-02-02

[Diego Novillo <dnovillo at redhat dot com>]

This merge needed a few tweaks to allow bootstrapping with
-Werror.  The warnings are mostly caused by the gimplifier.
There are two types:

- Use of uninitialized variables.  Given the following code
  fragment:

	    j = 3;
	    if (j < 5 || (i = 3) > 0)
	      j = i++;

  The gimplifier will produce the following transformation:

	    j = 3;
	    T.1 = j <= 4;
	    if (T.1 == 0)
	      {
	        i = 3;
	        T.1 = i > 0
	      };
	    if (T.1)
	      {
	        i.2 = i;
	        i = i + 1;
	        j = i.2
	      };

  This trips the warning because we still don't have enough
  analysis implemented to determine that 'i' is never used
  uninitialized.  The two if's generated by the gimplifier are
  mutually exclusive.  We could probably change the gimplifier to
  not do this expansion, but it's easier to fix the code for now.

  Initializing inside an if() is not very common, anyway.


- The second type of warning comes from the expanders for
  va_start.  In tree.c:build_stmt, we have

		build_stmt VPARAMS ((enum tree_code code, ...))
		{
		  ...
		  VA_OPEN (p, code);
		  ...
		}

		build_stmt (code)
		{
		  ...
		  code.162 = (unsigned int)code;
		  __builtin_va_start (p.161, code.162);
		  ...
		}

  The builtin expander issues the warning 'second parameter of
  `va_start' not last named argument'.  Jason thinks that this
  warning should be moved up into the front end.  I agree with
  that.

  I added -Wno-error to the files that trigger this warning.


Bootstrapped and tested on x86.


2003-02-03  Diego Novillo  <dnovillo@redhat.com>

	Fix warnings to allow bootstrapping with -Werror.

	* Makefile.in (c-semantics.o-warn): Add -Wno-error.
	(emit-rtl.o-warn): Likewise.
	(profile.o-warn): Likewise.
	(tree.o-warn): Likewise.
	(OBJS): Remove simple-break-elim.o and simple-goto-elim.o.
	* c-pretty-print.c (print_function_decl): Remove unused function.
	* bitmap.c (bitmap_last_set_bit): Initialize variable 'word'.
	* c-typeck.c (build_binary_op): Initialize variable 'type'.
	* combine.c (combine_simplify_rtx): Initialize variable 'reversed'.
	(make_compound_operation): Initialize variable 'i'.
	* dwarf2out.c (dwarf2out_finish): Initialize variable 'context'.
	* expr.c (store_constructor): Initialize variables 'lo', 'hi',
	'startb' and 'endb'.
	(expand_expr): Initialize variable 'op0'.
	* fold-const.c (fold): Initialize variable 'tem'.
	* profile.c (branch_prob): Initialize variable 'prev_file_name'.
	* reload.c (find_equiv_reg): Initialize variables 'valtry and
	'valueno'.
	* rtlanal.c (get_jump_table_offset): Initialize variable 'set'.
	* ssa-ccp.c (ssa_const_prop): Fix sign mismatch warning.
	* varasm.c (output_constant_def): Initialize variable 'defstr'.
	* gimplify.c (simplify_expr): Initialize variables
	'saved_input_filename' and 'saved_lineno'.
	(simplify_compound_lval): Initialize variable 'code'.
	* tree-alias-ander.c (pta_bottom): De-ansify.
	(andersen_cleanup): Remove unused variables.
	(andersen_heap_assign): Mark argument lhs ATTRIBUTE_UNUSED.
	(pta_bottom): Remove unused function.
	(pta_get_ptsize): Remove unused function.


cp/

2003-02-03  Diego Novillo  <dnovillo@redhat.com>

	* parser.c (cp_parser_asm_definition): Call finish_asm_stmt with
	'volatile_p' directly.
	* typeck.c (build_binary_op): Initialize variable 'type'.
	* Make-lang.in (cp/tree.o-warn): Add -Wno-error.


java/

2003-02-03  Diego Novillo  <dnovillo@redhat.com>

	* parse.y (qualify_ambiguous_name): Initialize variable 'decl'.