#include "irgwalk.h"
#include "irprog.h"
#include "irprintf.h"
+#include "iredges_t.h"
#include "bitset.h"
#include "debug.h"
-#include <obstack.h>
-
-#ifdef obstack_chunk_alloc
-# undef obstack_chunk_alloc
-# define obstack_chunk_alloc malloc
-#else
-# define obstack_chunk_alloc malloc
-# define obstack_chunk_free free
-#endif
-
#include "../bearch.h" /* the general register allocator interface */
+#include "../benode_t.h"
#include "bearch_ia32_t.h"
#include "ia32_new_nodes.h" /* ia32 nodes interface */
return 0;
}
+static int is_P_frame_base_Proj(const ir_node *n) {
+ if (is_Proj(n) &&
+ get_irn_opcode(get_Proj_pred(n)) == iro_Start &&
+ get_Proj_proj(n) == pn_Start_P_frame_base)
+ {
+ return 1;
+ }
+
+ return 0;
+}
+
+static int is_used_by_Keep(const ir_node *n) {
+ return be_is_Keep(get_edge_src_irn(get_irn_out_edge_first(n)));
+}
+
/**
* Return register requirements for an ia32 node.
* If the node returns a tuple (mode_T) then the proj's
DBG((mod, LEVEL_1, "get requirements at pos %d for %+F ... ", pos, irn));
- if (is_Call_Proj(irn)) {
+ if (is_Call_Proj(irn) && is_used_by_Keep(irn)) {
irn_req = ia32_projnum_reg_req_map[get_Proj_proj(irn)];
memcpy(req, &(irn_req->req), sizeof(*req));
return req;
case pn_Start_X_initial_exec:
case pn_Start_P_value_arg_base:
case pn_Start_P_globals:
- memcpy(req, &(ia32_default_req_none.req), sizeof(*req));
- break;
case pn_Start_P_frame_base:
memcpy(req, &(ia32_default_req_none.req), sizeof(*req));
break;
static void ia32_set_irn_reg(const arch_irn_ops_t *self, ir_node *irn, const arch_register_t *reg) {
int pos = 0;
- if (is_Call_Proj(irn)) {
+ if ((is_Call_Proj(irn) && is_used_by_Keep(irn)) || is_P_frame_base_Proj(irn)) {
/* don't skip the proj, we want to take the else below */
}
- if (is_Proj(irn)) {
+ else if (is_Proj(irn)) {
pos = ia32_translate_proj_pos(irn);
irn = my_skip_proj(irn);
}
int pos = 0;
const arch_register_t *reg = NULL;
- if (is_Call_Proj(irn)) {
+ if ((is_Call_Proj(irn) && is_used_by_Keep(irn)) || is_P_frame_base_Proj(irn)) {
/* don't skip the proj, we want to take the else below */
}
else if (is_Proj(irn)) {
* |___/
**************************************************/
+static void check_for_alloca(ir_node *irn, void *env) {
+ int *has_alloca = env;
+
+ if (get_irn_opcode(irn) == iro_Alloc) {
+ if (get_Alloc_where(irn) == stack_alloc) {
+ *has_alloca = 1;
+ }
+ }
+}
+
/**
* Transforms the standard firm graph into
* an ia32 firm graph
*/
static void ia32_prepare_graph(void *self) {
- ia32_code_gen_t *cg = self;
+ ia32_code_gen_t *cg = self;
+ int has_alloca = 0;
+
+ if (! is_pseudo_ir_graph(cg->irg)) {
+ /* If there is a alloca in the irg, we use %ebp for stack addressing */
+ /* instead of %esp, as alloca destroys %esp. */
+
+ /* check for alloca node */
+ irg_walk_blkwise_graph(cg->irg, check_for_alloca, NULL, &has_alloca);
+
+ if (has_alloca) {
+ ia32_general_purpose_regs[REG_EBP].type = arch_register_type_ignore;
+ }
- if (! is_pseudo_ir_graph(cg->irg))
irg_walk_blkwise_graph(cg->irg, NULL, ia32_transform_node, cg);
+ }
}
/**
- * Dummy functions for hooks we don't need but which must be filled.
+ * Set the register for P_frame_base Proj to %esp.
+ */
+static void ia32_set_P_frame_base_Proj_reg(ir_node *irn, void *env) {
+ ia32_code_gen_t *cg = env;
+
+ if (is_P_frame_base_Proj(irn)) {
+ arch_set_irn_register(cg->arch_env, irn, &ia32_general_purpose_regs[REG_ESP]);
+ }
+}
+
+/**
+ * This function is the hook before_sched but more important: it is
+ * called after the dead node elimination. The dead node elimination changes
+ * the memory location of the nodes, which will change the hash key of
+ * the Proj_P_frame_base(Start) and this will fuck up the firm_node -> register
+ * hash map. So we need to insert the register for this node after the dead node
+ * elimination.
*/
-static void ia32_before_sched(void *self) {
+static void ia32_some_stuff_need_to_be_done_after_deadnode_elimination(void *self) {
+ ia32_code_gen_t *cg = self;
+
+ if (! is_pseudo_ir_graph(cg->irg))
+ irg_walk_blkwise_graph(cg->irg, NULL, ia32_set_P_frame_base_Proj_reg, cg);
}
+
+
+/**
+ * Dummy functions for hooks we don't need but which must be filled.
+ */
static void ia32_before_ra(void *self) {
}
static const arch_code_generator_if_t ia32_code_gen_if = {
ia32_cg_init,
ia32_prepare_graph,
- ia32_before_sched, /* before scheduling hook */
+ ia32_some_stuff_need_to_be_done_after_deadnode_elimination, /* before scheduling hook */
ia32_before_ra, /* before register allocation hook */
ia32_codegen /* emit && done */
};
return ia32_get_reg_projnum(reg, isa->reg_projnum_map);
}
+int ia32_to_appear_in_schedule(void *block_env, const ir_node *irn) {
+ return is_ia32_irn(irn);
+}
+
/**
* Initializes the code generator interface.
*/
return &ia32_code_gen_if;
}
+list_sched_selector_t ia32_sched_selector;
+
/**
- * Returns the default scheduler
+ * Returns the reg_pressure scheduler with to_appear_in_schedule() overloaded
*/
static const list_sched_selector_t *ia32_get_list_sched_selector(const void *self) {
- return reg_pressure_selector;
+ memcpy(&ia32_sched_selector, reg_pressure_selector, sizeof(list_sched_selector_t));
+ ia32_sched_selector.to_appear_in_schedule = ia32_to_appear_in_schedule;
+ return &ia32_sched_selector;
}
#ifdef WITH_LIBCORE
projects / libfirm / blobdiff