tree-ssa-forwprop.c (forward_propagate_into_cond): Avoid typo potentially leading to null pointer dereference.

	* tree-ssa-forwprop.c (forward_propagate_into_cond): Avoid 
	typo potentially leading to null pointer dereference.

	* caller-save.c (new_saved_hard_reg): Eliminate return value.
	(setup_save_areas): Corresponding changes to avoid useless
	assignments.

	* jump.c (reversed_comparison_code_parts): Avoid successive return
	statements when REVERSE_CONDITION is defined.

	* expr.c (expand_assignment): Avoid useless assignments.
	(expand_expr_real_1): Likewise.
	(expand_expr_real_2): Avoid useless statements.

	* tree-ssa-phiopt.c (minmax_replacement): Avoid useless statement.

	* cfgexpand.c (expand_gimple_basic_block): Avoid useless assignment.

	* tree-ssa-dce.c (mark_stmt_if_obviously_necessary): Avoid useless
	statements.

	* stmt.c (expand_expr_stmt): Avoid useless assignment.

From-SVN: r171780

1 files changed, 2 insertions, 6 deletions

diff --git a/gcc/expr.c b/gcc/expr.c
index 076b8d2..ca61804 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -4124,7 +4124,7 @@ expand_assignment (tree to, tree from, bool nontemporal)
   /* Don't crash if the lhs of the assignment was erroneous.  */
   if (TREE_CODE (to) == ERROR_MARK)
     {
-      result = expand_normal (from);
+      expand_normal (from);
       return;
     }
 
@@ -8170,7 +8170,6 @@ expand_expr_real_2 (sepops ops, rtx target, enum machine_mode tmode,
     case VEC_UNPACK_LO_EXPR:
       {
 	op0 = expand_normal (treeop0);
-	this_optab = optab_for_tree_code (code, type, optab_default);
 	temp = expand_widen_pattern_expr (ops, op0, NULL_RTX, NULL_RTX,
 					  target, unsignedp);
 	gcc_assert (temp);
@@ -8182,9 +8181,6 @@ expand_expr_real_2 (sepops ops, rtx target, enum machine_mode tmode,
       {
 	op0 = expand_normal (treeop0);
 	/* The signedness is determined from input operand.  */
-	this_optab = optab_for_tree_code (code,
-					  TREE_TYPE (treeop0),
-					  optab_default);
 	temp = expand_widen_pattern_expr
 	  (ops, op0, NULL_RTX, NULL_RTX,
 	   target, TYPE_UNSIGNED (TREE_TYPE (treeop0)));
@@ -8334,7 +8330,7 @@ expand_expr_real_1 (tree exp, rtx target, enum machine_mode tmode,
 	{
 	  temp = expand_expr (exp, NULL_RTX, VOIDmode, modifier);
 	  if (MEM_P (temp))
-	    temp = copy_to_reg (temp);
+	    copy_to_reg (temp);
 	  return const0_rtx;
 	}