builtins.c (gimplify_va_arg_expr): Reword comments to avoid 'abort'.

	* builtins.c (gimplify_va_arg_expr): Reword comments to avoid
	'abort'. Use gcc_assert and gcc_unreachable as appropriate.
	* c-format.c (get_constant, decode_format_attr, get_flag_spec,
	find_char_info_specifier_index,
	find_length_info_modifier_index): Likewise.
	* c-typeck.c (composite_type, pop_init_level): Likewise.
	* combine.c (cant_combine_insn_p, try_combine): Likewise.
	* cse.c (cse_insn): Likewise
	* dominance.c (calc_dfs_tree): Likewise
	dwarf2out.c (loc_descriptor_from_tree_1,
	add_abstract_origin_attribute, force_decl_die,
	force_type_die): Likewise
	emit-rtl.c (operand_subword_force): Likewise
	explow.c (hard_function_value): Likewise
	expmed.c (store_bit_field, expand_divmod,
	emit_store_flag_force): Likewise
	expr.c (emit_move_multi_word, store_expr,
	expand_expr_real_1): Likewise
	final.c (this_is_asm_operands, shorten_branches, final_scan_insn,
	output_operand): Likewise
	flow.c (recompute_reg_usage): Likewise
	* function.c (assign_stack_temp_for_type, assign_temp,
	handle_epilogue_set): Likewise
	* genextract.c (main): Likewise
	* gimplify.c (mostly_copy_tree_r, gimplify_return_expr,
	gimplify_modify_expr_rhs, gimplify_expr): Likewise
	* haifa-sched.c (ready_lastpos, ready_remove_first, ready_element,
	ready_remove, rm_line_notes, rm_other_notes,
	schedule_block): Likewise
	mips-tfile.c (copy_object, out_of_bounds): Likewise

From-SVN: r98567

1 files changed, 7 insertions, 8 deletions

diff --git a/gcc/expr.c b/gcc/expr.c
index 02236af..07e57a4 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -3020,8 +3020,8 @@ emit_move_multi_word (enum machine_mode mode, rtx x, rtx y)
       rtx ypart = operand_subword (y, i, 1, mode);
 
       /* If we can't get a part of Y, put Y into memory if it is a
-	 constant.  Otherwise, force it into a register.  If we still
-	 can't get a part of Y, abort.  */
+	 constant.  Otherwise, force it into a register.  Then we must
+	 be able to get a part of Y.  */
       if (ypart == 0 && CONSTANT_P (y))
 	{
 	  y = force_const_mem (mode, y);
@@ -4222,10 +4222,10 @@ store_expr (tree exp, rtx target, int call_param_p)
 	 but TARGET is not valid memory reference, TEMP will differ
 	 from TARGET although it is really the same location.  */
       && !(alt_rtl && rtx_equal_p (alt_rtl, target))
-      /* If there's nothing to copy, don't bother.  Don't call expr_size
-	 unless necessary, because some front-ends (C++) expr_size-hook
-	 aborts on objects that are not supposed to be bit-copied or
-	 bit-initialized.  */
+      /* If there's nothing to copy, don't bother.  Don't call
+	 expr_size unless necessary, because some front-ends (C++)
+	 expr_size-hook must not be given objects that are not
+	 supposed to be bit-copied or bit-initialized.  */
       && expr_size (exp) != const0_rtx)
     {
       if (GET_MODE (temp) != GET_MODE (target)
@@ -8341,8 +8341,7 @@ expand_expr_real_1 (tree exp, rtx target, enum machine_mode tmode,
         op2 = expand_expr (oprnd2, NULL_RTX, VOIDmode, 0);
         temp = expand_ternary_op (mode, this_optab, op0, op1, op2, 
 				  target, unsignedp);
-        if (temp == 0)
-          abort ();
+        gcc_assert (temp);
         return temp;
       }