Renamed ia32 Push0 to PushEax (because this is the generated instruction).

[r27369]

ir/be/ia32/ia32_optimize.c

@@ -921,12 +921,12 @@ static void peephole_be_IncSP(ir_node *node)
 		dbgi  = get_irn_dbg_info(node);
 		block = get_nodes_block(node);
 		stack = be_get_IncSP_pred(node);
-		stack = new_bd_ia32_Push0(dbgi, block, stack);
+		stack = new_bd_ia32_PushEax(dbgi, block, stack);
 		arch_set_irn_register(stack, esp);
 		sched_add_before(node, stack);
 
 		if (offset == +8) {
-			stack = new_bd_ia32_Push0(dbgi, block, stack);
+			stack = new_bd_ia32_PushEax(dbgi, block, stack);
 			arch_set_irn_register(stack, esp);
 			sched_add_before(node, stack);
 		}

ir/be/ia32/ia32_spec.pl

@@ -1363,7 +1363,7 @@ Push => {
 	units     => [ "GP" ],
 },
 
-Push0 => {
+PushEax => {
 	state   => "exc_pinned",
 	reg_req => { in => [ "esp" ], out => [ "esp:I|S" ] },
 	ins     => [ "stack" ],