tree-parloops.c (separate_decls_in_region_debug_bind): Drop debug stmts setting DEBUG_EXPR_DECLs.

	* tree-parloops.c (separate_decls_in_region_debug_bind): Drop debug
	stmts setting DEBUG_EXPR_DECLs.

	* cfgexpand.c (expand_debug_expr): Ignore zero-length bitfields.
	Don't crash if mode1 is VOIDmode.

From-SVN: r152772

gcc/ChangeLog

+2009-10-14  Jakub Jelinek  <jakub@redhat.com>
+
+	* tree-parloops.c (separate_decls_in_region_debug_bind): Drop debug
+	stmts setting DEBUG_EXPR_DECLs.
+
+	* cfgexpand.c (expand_debug_expr): Ignore zero-length bitfields.
+	Don't crash if mode1 is VOIDmode.
+
 2009-09-26  Vladimir Makarov  <vmakarov@redhat.com>
 
 	* params.def (PARAM_IRA_LOOP_RESERVED_REGS): New.

gcc/cfgexpand.c

@@ -2524,6 +2524,9 @@ expand_debug_expr (tree exp)
 					&mode1, &unsignedp, &volatilep, false);
 	rtx orig_op0;
 
+	if (bitsize == 0)
+	  return NULL;
+
 	orig_op0 = op0 = expand_debug_expr (tem);
 
 	if (!op0)
@@ -2561,6 +2564,9 @@ expand_debug_expr (tree exp)
 
 	if (MEM_P (op0))
 	  {
+	    if (mode1 == VOIDmode)
+	      /* Bitfield.  */
+	      mode1 = smallest_mode_for_size (bitsize, MODE_INT);
 	    if (bitpos >= BITS_PER_UNIT)
 	      {
 		op0 = adjust_address_nv (op0, mode1, bitpos / BITS_PER_UNIT);
@@ -2568,7 +2574,8 @@ expand_debug_expr (tree exp)
 	      }
 	    else if (bitpos < 0)
 	      {
-		int units = (-bitpos + BITS_PER_UNIT - 1) / BITS_PER_UNIT;
+		HOST_WIDE_INT units
+		  = (-bitpos + BITS_PER_UNIT - 1) / BITS_PER_UNIT;
 		op0 = adjust_address_nv (op0, mode1, units);
 		bitpos += units * BITS_PER_UNIT;
 	      }

gcc/tree-parloops.c

@@ -715,6 +715,8 @@ separate_decls_in_region_debug_bind (gimple stmt,
   void **slot, **dslot;
 
   var = gimple_debug_bind_get_var (stmt);
+  if (TREE_CODE (var) == DEBUG_EXPR_DECL)
+    return true;
   gcc_assert (DECL_P (var) && SSA_VAR_P (var));
   ielt.uid = DECL_UID (var);
   dslot = htab_find_slot_with_hash (decl_copies, &ielt, ielt.uid, NO_INSERT);