+ sched_add_before(schedpoint, pop);
+
+ in[0] = val;
+ keep = be_new_Keep(&ia32_reg_classes[CLASS_ia32_gp], irg, block, 1, in);
+ sched_add_before(schedpoint, keep);
+
+ return stack;
+}
+
+/**
+ * Creates a Push instruction before the given schedule point.
+ *
+ * @param dbgi debug info
+ * @param irg the graph
+ * @param block the block
+ * @param stack the previous stack value
+ * @param schedpoint the new node is added before this node
+ * @param reg the register to pop
+ *
+ * @return the new stack value
+ */
+static ir_node *create_push(dbg_info *dbgi, ir_graph *irg, ir_node *block,
+ ir_node *stack, ir_node *schedpoint,
+ const arch_register_t *reg)
+{
+ const arch_register_t *esp = &ia32_gp_regs[REG_ESP];
+ ir_node *noreg, *nomem, *push, *val;
+
+ val = new_rd_ia32_ProduceVal(NULL, irg, block);
+ arch_set_irn_register(arch_env, val, reg);
+ sched_add_before(schedpoint, val);
+
+ noreg = ia32_new_NoReg_gp(cg);
+ nomem = get_irg_no_mem(irg);
+ push = new_rd_ia32_Push(dbgi, irg, block, noreg, noreg, nomem, val, stack);
+ sched_add_before(schedpoint, push);
+
+ stack = new_r_Proj(irg, block, push, mode_Iu, pn_ia32_Push_stack);
+ arch_set_irn_register(arch_env, stack, esp);
+
+ return stack;
+}
+
+/**
+ * Optimize an IncSp by replacing it with push/pop
+ */
+static void peephole_be_IncSP(ir_node *node)
+{
+ const arch_register_t *esp = &ia32_gp_regs[REG_ESP];
+ const arch_register_t *reg;
+ ir_graph *irg = current_ir_graph;
+ dbg_info *dbgi;
+ ir_node *block;
+ ir_node *stack;
+ int offset;
+
+ /* first optimize incsp->incsp combinations */
+ be_peephole_IncSP_IncSP(node);
+
+ /* transform IncSP->Store combinations to Push where possible */
+ peephole_IncSP_Store_to_push(node);
+
+ if (arch_get_irn_register(arch_env, node) != esp)
+ return;
+
+ /* replace IncSP -4 by Pop freereg when possible */
+ offset = be_get_IncSP_offset(node);
+ if ((offset != -8 || ia32_cg_config.use_add_esp_8) &&
+ (offset != -4 || ia32_cg_config.use_add_esp_4) &&
+ (offset != +4 || ia32_cg_config.use_sub_esp_4) &&
+ (offset != +8 || ia32_cg_config.use_sub_esp_8))
+ return;
+
+ if (offset < 0) {
+ /* we need a free register for pop */
+ reg = get_free_gp_reg();
+ if (reg == NULL)
+ return;
+
+ dbgi = get_irn_dbg_info(node);
+ block = get_nodes_block(node);
+ stack = be_get_IncSP_pred(node);
+
+ stack = create_pop(dbgi, irg, block, stack, node, reg);
+
+ if (offset == -8) {
+ stack = create_pop(dbgi, irg, block, stack, node, reg);
+ }