/**
* This is the main ia32 firm backend driver.
- *
+ * @author Christian Wuerdig
* $Id$
*/
#include "ircons.h"
#include "irgmod.h"
#include "irgopt.h"
-
-#include "bitset.h"
+#include "irbitset.h"
+#include "pdeq.h"
#include "debug.h"
#include "../beabi.h" /* the general register allocator interface */
#include "ia32_optimize.h"
#include "ia32_x87.h"
#include "ia32_dbg_stat.h"
+#include "ia32_finish.h"
+#include "ia32_util.h"
#define DEBUG_MODULE "firm.be.ia32.isa"
return arch_irn_class_branch;
else if (is_ia32_Cnst(irn))
return arch_irn_class_const;
+ else if (is_ia32_Ld(irn))
+ return arch_irn_class_load;
+ else if (is_ia32_St(irn) || is_ia32_Store8Bit(irn))
+ return arch_irn_class_store;
else if (is_ia32_irn(irn))
return arch_irn_class_normal;
else
return env;
}
+/**
+ * Put all registers which are saved by the prologue/epilogue in a set.
+ *
+ * @param self The callback object.
+ * @param s The result set.
+ */
static void ia32_abi_dont_save_regs(void *self, pset *s)
{
ia32_abi_env_t *env = self;
}
/**
- * Generate the prologue.
+ * Generate the routine prologue.
+ *
* @param self The callback object.
* @param mem A pointer to the mem node. Update this if you define new memory.
- * @param reg_map A mapping mapping all callee_save/ignore/parameter registers to their defining nodes.
+ * @param reg_map A map mapping all callee_save/ignore/parameter registers to their defining nodes.
+ *
* @return The register which shall be used as a stack frame base.
*
* All nodes which define registers in @p reg_map must keep @p reg_map current.
ia32_abi_env_t *env = self;
if (!env->flags.try_omit_fp) {
- int reg_size = get_mode_size_bytes(env->isa->bp->reg_class->mode);
ir_node *bl = get_irg_start_block(env->irg);
ir_node *curr_sp = be_abi_reg_map_get(reg_map, env->isa->sp);
ir_node *curr_bp = be_abi_reg_map_get(reg_map, env->isa->bp);
ir_node *push;
/* push ebp */
- push = new_rd_ia32_Push(NULL, env->irg, bl, curr_sp, curr_bp, *mem, mode_T);
- curr_sp = new_r_Proj(env->irg, bl, push, get_irn_mode(curr_sp), 0);
- *mem = new_r_Proj(env->irg, bl, push, mode_M, 1);
+ push = new_rd_ia32_Push(NULL, env->irg, bl, curr_sp, curr_bp, *mem);
+ curr_sp = new_r_Proj(env->irg, bl, push, get_irn_mode(curr_sp), pn_ia32_Push_stack);
+ *mem = new_r_Proj(env->irg, bl, push, mode_M, pn_ia32_Push_M);
/* the push must have SP out register */
- arch_set_irn_register(env->aenv, curr_sp, env->isa->sp);
+ arch_set_irn_register(env->aenv, curr_sp, env->isa->sp);
+ set_ia32_flags(push, arch_irn_flags_ignore);
/* move esp to ebp */
curr_bp = be_new_Copy(env->isa->bp->reg_class, env->irg, bl, curr_sp);
return env->isa->sp;
}
+/**
+ * Generate the routine epilogue.
+ * @param self The callback object.
+ * @param bl The block for the epilog
+ * @param mem A pointer to the mem node. Update this if you define new memory.
+ * @param reg_map A map mapping all callee_save/ignore/parameter registers to their defining nodes.
+ * @return The register which shall be used as a stack frame base.
+ *
+ * All nodes which define registers in @p reg_map must keep @p reg_map current.
+ */
static void ia32_abi_epilogue(void *self, ir_node *bl, ir_node **mem, pmap *reg_map)
{
ia32_abi_env_t *env = self;
else {
const ia32_isa_t *isa = (ia32_isa_t *)env->isa;
ir_mode *mode_bp = env->isa->bp->reg_class->mode;
- int reg_size = get_mode_size_bytes(env->isa->bp->reg_class->mode);
- if (ARCH_AMD(isa->opt_arch)) {
+ /* gcc always emits a leave at the end of a routine */
+ if (1 || ARCH_AMD(isa->opt_arch)) {
ir_node *leave;
/* leave */
- leave = new_rd_ia32_Leave(NULL, env->irg, bl, curr_sp, *mem, mode_T);
+ leave = new_rd_ia32_Leave(NULL, env->irg, bl, curr_sp, *mem);
set_ia32_flags(leave, arch_irn_flags_ignore);
- curr_bp = new_r_Proj(current_ir_graph, bl, leave, mode_bp, 0);
- curr_sp = new_r_Proj(current_ir_graph, bl, leave, get_irn_mode(curr_sp), 1);
- *mem = new_r_Proj(current_ir_graph, bl, leave, mode_M, 2);
+ curr_bp = new_r_Proj(current_ir_graph, bl, leave, mode_bp, pn_ia32_Leave_frame);
+ curr_sp = new_r_Proj(current_ir_graph, bl, leave, get_irn_mode(curr_sp), pn_ia32_Leave_stack);
+ *mem = new_r_Proj(current_ir_graph, bl, leave, mode_M, pn_ia32_Leave_M);
}
else {
ir_node *pop;
curr_sp = be_new_SetSP(env->isa->sp, env->irg, bl, curr_sp, curr_bp, *mem);
/* pop ebp */
- pop = new_rd_ia32_Pop(NULL, env->irg, bl, curr_sp, *mem, mode_T);
+ pop = new_rd_ia32_Pop(NULL, env->irg, bl, curr_sp, *mem);
set_ia32_flags(pop, arch_irn_flags_ignore);
- curr_bp = new_r_Proj(current_ir_graph, bl, pop, mode_bp, 0);
- curr_sp = new_r_Proj(current_ir_graph, bl, pop, get_irn_mode(curr_sp), 1);
- *mem = new_r_Proj(current_ir_graph, bl, pop, mode_M, 2);
+ curr_bp = new_r_Proj(current_ir_graph, bl, pop, mode_bp, pn_ia32_Pop_res);
+ curr_sp = new_r_Proj(current_ir_graph, bl, pop, get_irn_mode(curr_sp), pn_ia32_Pop_stack);
+ *mem = new_r_Proj(current_ir_graph, bl, pop, mode_M, pn_ia32_Pop_M);
}
arch_set_irn_register(env->aenv, curr_sp, env->isa->sp);
arch_set_irn_register(env->aenv, curr_bp, env->isa->bp);
*/
static ir_type *ia32_abi_get_between_type(void *self)
{
+#define IDENT(s) new_id_from_chars(s, sizeof(s)-1)
static ir_type *omit_fp_between_type = NULL;
static ir_type *between_type = NULL;
ia32_abi_env_t *env = self;
- if(!between_type) {
+ if ( !between_type) {
entity *old_bp_ent;
entity *ret_addr_ent;
entity *omit_fp_ret_addr_ent;
- ir_type *old_bp_type = new_type_primitive(new_id_from_str("bp"), mode_P);
- ir_type *ret_addr_type = new_type_primitive(new_id_from_str("return_addr"), mode_P);
+ ir_type *old_bp_type = new_type_primitive(IDENT("bp"), mode_P);
+ ir_type *ret_addr_type = new_type_primitive(IDENT("return_addr"), mode_P);
- between_type = new_type_class(new_id_from_str("ia32_between_type"));
- old_bp_ent = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
- ret_addr_ent = new_entity(between_type, new_id_from_str("ret_addr"), ret_addr_type);
+ between_type = new_type_struct(IDENT("ia32_between_type"));
+ old_bp_ent = new_entity(between_type, IDENT("old_bp"), old_bp_type);
+ ret_addr_ent = new_entity(between_type, IDENT("ret_addr"), ret_addr_type);
set_entity_offset_bytes(old_bp_ent, 0);
set_entity_offset_bytes(ret_addr_ent, get_type_size_bytes(old_bp_type));
set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
+ set_type_state(between_type, layout_fixed);
- omit_fp_between_type = new_type_class(new_id_from_str("ia32_between_type_omit_fp"));
- omit_fp_ret_addr_ent = new_entity(omit_fp_between_type, new_id_from_str("ret_addr"), ret_addr_type);
+ omit_fp_between_type = new_type_struct(IDENT("ia32_between_type_omit_fp"));
+ omit_fp_ret_addr_ent = new_entity(omit_fp_between_type, IDENT("ret_addr"), ret_addr_type);
set_entity_offset_bytes(omit_fp_ret_addr_ent, 0);
set_type_size_bytes(omit_fp_between_type, get_type_size_bytes(ret_addr_type));
+ set_type_state(omit_fp_between_type, layout_fixed);
}
return env->flags.try_omit_fp ? omit_fp_between_type : between_type;
+#undef IDENT
+}
+
+/**
+ * Get the estimated cycle count for @p irn.
+ *
+ * @param self The this pointer.
+ * @param irn The node.
+ *
+ * @return The estimated cycle count for this operation
+ */
+static int ia32_get_op_estimated_cost(const void *self, const ir_node *irn)
+{
+ int cost;
+
+ if(is_Proj(irn))
+ return 0;
+
+ switch (get_ia32_irn_opcode(irn)) {
+ case iro_ia32_xDiv:
+ case iro_ia32_DivMod:
+ cost = 8;
+ break;
+
+ case iro_ia32_xLoad:
+ case iro_ia32_l_Load:
+ case iro_ia32_Load:
+ cost = 25;
+ break;
+
+ case iro_ia32_Push:
+ case iro_ia32_Pop:
+ cost = 5;
+ break;
+
+ case iro_ia32_xStore:
+ case iro_ia32_l_Store:
+ case iro_ia32_Store:
+ case iro_ia32_Store8Bit:
+ cost = 50;
+ break;
+
+ case iro_ia32_MulS:
+ case iro_ia32_Mul:
+ case iro_ia32_Mulh:
+ case iro_ia32_xMul:
+ case iro_ia32_l_MulS:
+ case iro_ia32_l_Mul:
+ cost = 2;
+ break;
+
+ default:
+ cost = 1;
+ }
+
+ return cost;
+}
+
+/**
+ * Returns the inverse operation if @p irn, recalculating the argument at position @p i.
+ *
+ * @param irn The original operation
+ * @param i Index of the argument we want the inverse operation to yield
+ * @param inverse struct to be filled with the resulting inverse op
+ * @param obstack The obstack to use for allocation of the returned nodes array
+ * @return The inverse operation or NULL if operation invertible
+ */
+static arch_inverse_t *ia32_get_inverse(const void *self, const ir_node *irn, int i, arch_inverse_t *inverse, struct obstack *obst) {
+ ir_graph *irg;
+ ir_mode *mode;
+ ir_node *block, *noreg, *nomem;
+ int pnc;
+
+ /* we cannot invert non-ia32 irns */
+ if (! is_ia32_irn(irn))
+ return NULL;
+
+ /* operand must always be a real operand (not base, index or mem) */
+ if (i != 2 && i != 3)
+ return NULL;
+
+ /* we don't invert address mode operations */
+ if (get_ia32_op_type(irn) != ia32_Normal)
+ return NULL;
+
+ irg = get_irn_irg(irn);
+ block = get_nodes_block(irn);
+ mode = get_ia32_res_mode(irn);
+ noreg = get_irn_n(irn, 0);
+ nomem = new_r_NoMem(irg);
+
+ /* initialize structure */
+ inverse->nodes = obstack_alloc(obst, 2 * sizeof(inverse->nodes[0]));
+ inverse->costs = 0;
+ inverse->n = 2;
+
+ switch (get_ia32_irn_opcode(irn)) {
+ case iro_ia32_Add:
+ if (get_ia32_immop_type(irn) == ia32_ImmConst) {
+ /* we have an add with a const here */
+ /* invers == add with negated const */
+ inverse->nodes[0] = new_rd_ia32_Add(NULL, irg, block, noreg, noreg, get_irn_n(irn, i), noreg, nomem);
+ pnc = pn_ia32_Add_res;
+ inverse->costs += 1;
+ copy_ia32_Immop_attr(inverse->nodes[0], (ir_node *)irn);
+ set_ia32_Immop_tarval(inverse->nodes[0], tarval_neg(get_ia32_Immop_tarval(irn)));
+ set_ia32_commutative(inverse->nodes[0]);
+ }
+ else if (get_ia32_immop_type(irn) == ia32_ImmSymConst) {
+ /* we have an add with a symconst here */
+ /* invers == sub with const */
+ inverse->nodes[0] = new_rd_ia32_Sub(NULL, irg, block, noreg, noreg, get_irn_n(irn, i), noreg, nomem);
+ pnc = pn_ia32_Sub_res;
+ inverse->costs += 2;
+ copy_ia32_Immop_attr(inverse->nodes[0], (ir_node *)irn);
+ }
+ else {
+ /* normal add: inverse == sub */
+ ir_node *proj = ia32_get_res_proj(irn);
+ assert(proj);
+
+ inverse->nodes[0] = new_rd_ia32_Sub(NULL, irg, block, noreg, noreg, proj, get_irn_n(irn, i ^ 1), nomem);
+ pnc = pn_ia32_Sub_res;
+ inverse->costs += 2;
+ }
+ break;
+ case iro_ia32_Sub:
+ if (get_ia32_immop_type(irn) != ia32_ImmNone) {
+ /* we have a sub with a const/symconst here */
+ /* invers == add with this const */
+ inverse->nodes[0] = new_rd_ia32_Add(NULL, irg, block, noreg, noreg, get_irn_n(irn, i), noreg, nomem);
+ pnc = pn_ia32_Add_res;
+ inverse->costs += (get_ia32_immop_type(irn) == ia32_ImmSymConst) ? 5 : 1;
+ copy_ia32_Immop_attr(inverse->nodes[0], (ir_node *)irn);
+ }
+ else {
+ /* normal sub */
+ ir_node *proj = ia32_get_res_proj(irn);
+ assert(proj);
+
+ if (i == 2) {
+ inverse->nodes[0] = new_rd_ia32_Add(NULL, irg, block, noreg, noreg, proj, get_irn_n(irn, 3), nomem);
+ }
+ else {
+ inverse->nodes[0] = new_rd_ia32_Sub(NULL, irg, block, noreg, noreg, get_irn_n(irn, 2), proj, nomem);
+ }
+ pnc = pn_ia32_Sub_res;
+ inverse->costs += 1;
+ }
+ break;
+ case iro_ia32_Eor:
+ if (get_ia32_immop_type(irn) != ia32_ImmNone) {
+ /* xor with const: inverse = xor */
+ inverse->nodes[0] = new_rd_ia32_Eor(NULL, irg, block, noreg, noreg, get_irn_n(irn, i), noreg, nomem);
+ pnc = pn_ia32_Eor_res;
+ inverse->costs += (get_ia32_immop_type(irn) == ia32_ImmSymConst) ? 5 : 1;
+ copy_ia32_Immop_attr(inverse->nodes[0], (ir_node *)irn);
+ }
+ else {
+ /* normal xor */
+ inverse->nodes[0] = new_rd_ia32_Eor(NULL, irg, block, noreg, noreg, (ir_node *)irn, get_irn_n(irn, i), nomem);
+ pnc = pn_ia32_Eor_res;
+ inverse->costs += 1;
+ }
+ break;
+ case iro_ia32_Not: {
+ ir_node *proj = ia32_get_res_proj(irn);
+ assert(proj);
+
+ inverse->nodes[0] = new_rd_ia32_Not(NULL, irg, block, noreg, noreg, proj, nomem);
+ pnc = pn_ia32_Not_res;
+ inverse->costs += 1;
+ break;
+ }
+ case iro_ia32_Minus: {
+ ir_node *proj = ia32_get_res_proj(irn);
+ assert(proj);
+
+ inverse->nodes[0] = new_rd_ia32_Minus(NULL, irg, block, noreg, noreg, proj, nomem);
+ pnc = pn_ia32_Minus_res;
+ inverse->costs += 1;
+ break;
+ }
+ default:
+ /* inverse operation not supported */
+ return NULL;
+ }
+
+ set_ia32_res_mode(inverse->nodes[0], mode);
+ inverse->nodes[1] = new_r_Proj(irg, block, inverse->nodes[0], mode, pnc);
+
+ return inverse;
+}
+
+/**
+ * Check if irn can load it's operand at position i from memory (source addressmode).
+ * @param self Pointer to irn ops itself
+ * @param irn The irn to be checked
+ * @param i The operands position
+ * @return Non-Zero if operand can be loaded
+ */
+static int ia32_possible_memory_operand(const void *self, const ir_node *irn, unsigned int i) {
+ if (! is_ia32_irn(irn) || /* must be an ia32 irn */
+ get_irn_arity(irn) != 5 || /* must be a binary operation */
+ get_ia32_op_type(irn) != ia32_Normal || /* must not already be a addressmode irn */
+ ! (get_ia32_am_support(irn) & ia32_am_Source) || /* must be capable of source addressmode */
+ (i != 2 && i != 3) || /* a "real" operand position must be requested */
+ (i == 2 && ! is_ia32_commutative(irn)) || /* if first operand requested irn must be commutative */
+ is_ia32_use_frame(irn)) /* must not already use frame */
+ return 0;
+
+ return 1;
+}
+
+static void ia32_perform_memory_operand(const void *self, ir_node *irn, ir_node *reload, unsigned int i) {
+ assert(ia32_possible_memory_operand(self, irn, i) && "Cannot perform memory operand change");
+ assert(get_nodes_block(reload) == get_nodes_block(irn) && "Reload must be in same block as irn.");
+
+ if (get_irn_n_edges(reload) > 1)
+ return;
+
+ if (i == 2) {
+ ir_node *tmp = get_irn_n(irn, 3);
+ set_irn_n(irn, 3, get_irn_n(irn, 2));
+ set_irn_n(irn, 2, tmp);
+ }
+
+ set_ia32_am_support(irn, ia32_am_Source);
+ set_ia32_op_type(irn, ia32_AddrModeS);
+ set_ia32_am_flavour(irn, ia32_B);
+ set_ia32_ls_mode(irn, get_irn_mode(reload));
+ set_ia32_frame_ent(irn, be_get_frame_entity(reload));
+ set_ia32_use_frame(irn);
+
+ set_irn_n(irn, 0, be_get_Reload_frame(reload));
+ set_irn_n(irn, 4, be_get_Reload_mem(reload));
+
+ /*
+ Input at position one is index register, which is NoReg.
+ We would need cg object to get a real noreg, but we cannot
+ access it from here.
+ */
+ set_irn_n(irn, 3, get_irn_n(irn, 1));
+
+ DBG_OPT_AM_S(reload, irn);
}
static const be_abi_callbacks_t ia32_abi_callbacks = {
ia32_classify,
ia32_get_flags,
ia32_get_frame_entity,
- ia32_set_stack_bias
+ ia32_set_stack_bias,
+ ia32_get_inverse,
+ ia32_get_op_estimated_cost,
+ ia32_possible_memory_operand,
+ ia32_perform_memory_operand,
};
ia32_irn_ops_t ia32_irn_ops = {
*/
static void ia32_prepare_graph(void *self) {
ia32_code_gen_t *cg = self;
+ dom_front_info_t *dom;
DEBUG_ONLY(firm_dbg_module_t *old_mod = cg->mod;)
FIRM_DBG_REGISTER(cg->mod, "firm.be.ia32.transform");
+
+ /* 1st: transform constants and psi condition trees */
+ ia32_pre_transform_phase(cg);
+
+ /* 2nd: transform all remaining nodes */
ia32_register_transformers();
- irg_walk_blkwise_graph(cg->irg, ia32_place_consts_set_modes, ia32_transform_node, cg);
- be_dump(cg->irg, "-transformed", dump_ir_block_graph_sched);
+ dom = be_compute_dominance_frontiers(cg->irg);
+ irg_walk_blkwise_graph(cg->irg, NULL, ia32_transform_node, cg);
+ be_free_dominance_frontiers(dom);
- if (cg->opt & IA32_OPT_DOAM) {
- edges_deactivate(cg->irg);
- //dead_node_elimination(cg->irg);
- edges_activate(cg->irg);
+ if (cg->dump)
+ be_dump(cg->irg, "-transformed", dump_ir_block_graph_sched);
- FIRM_DBG_REGISTER(cg->mod, "firm.be.ia32.am");
+ /* 3rd: optimize address mode */
+ FIRM_DBG_REGISTER(cg->mod, "firm.be.ia32.am");
+ ia32_optimize_addressmode(cg);
- irg_walk_blkwise_graph(cg->irg, NULL, ia32_optimize_am, cg);
+ if (cg->dump)
be_dump(cg->irg, "-am", dump_ir_block_graph_sched);
- }
DEBUG_ONLY(cg->mod = old_mod;)
}
-
/**
- * Insert copies for all ia32 nodes where the should_be_same requirement
- * is not fulfilled.
- * Transform Sub into Neg -- Add if IN2 == OUT
+ * Dummy functions for hooks we don't need but which must be filled.
*/
-static void ia32_finish_node(ir_node *irn, void *env) {
- ia32_code_gen_t *cg = env;
- const ia32_register_req_t **reqs;
- const arch_register_t *out_reg, *in_reg, *in2_reg;
- int n_res, i;
- ir_node *copy, *in_node, *block, *in2_node;
- ia32_op_type_t op_tp;
+static void ia32_before_sched(void *self) {
+}
- if (is_ia32_irn(irn)) {
- /* AM Dest nodes don't produce any values */
- op_tp = get_ia32_op_type(irn);
- if (op_tp == ia32_AddrModeD)
- goto end;
-
- reqs = get_ia32_out_req_all(irn);
- n_res = get_ia32_n_res(irn);
- block = get_nodes_block(irn);
-
- /* check all OUT requirements, if there is a should_be_same */
- if (op_tp == ia32_Normal && ! is_ia32_Lea(irn) && ! is_ia32_Conv_I2I(irn) && ! is_ia32_Conv_I2I8Bit(irn)) {
- for (i = 0; i < n_res; i++) {
- if (arch_register_req_is(&(reqs[i]->req), should_be_same)) {
- /* get in and out register */
- out_reg = get_ia32_out_reg(irn, i);
- in_node = get_irn_n(irn, reqs[i]->same_pos);
- in_reg = arch_get_irn_register(cg->arch_env, in_node);
-
- /* don't copy ignore nodes */
- if (arch_irn_is(cg->arch_env, in_node, ignore) && is_Proj(in_node))
- continue;
-
- /* check if in and out register are equal */
- if (! REGS_ARE_EQUAL(out_reg, in_reg)) {
- /* in case of a commutative op: just exchange the in's */
- /* beware: the current op could be everything, so test for ia32 */
- /* commutativity first before getting the second in */
- if (is_ia32_commutative(irn)) {
- in2_node = get_irn_n(irn, reqs[i]->same_pos ^ 1);
- in2_reg = arch_get_irn_register(cg->arch_env, in2_node);
-
- if (REGS_ARE_EQUAL(out_reg, in2_reg)) {
- set_irn_n(irn, reqs[i]->same_pos, in2_node);
- set_irn_n(irn, reqs[i]->same_pos ^ 1, in_node);
- }
- else
- goto insert_copy;
- }
- else {
-insert_copy:
- DBG((cg->mod, LEVEL_1, "inserting copy for %+F in_pos %d\n", irn, reqs[i]->same_pos));
- /* create copy from in register */
- copy = be_new_Copy(arch_register_get_class(in_reg), cg->irg, block, in_node);
-
- DBG_OPT_2ADDRCPY(copy);
-
- /* destination is the out register */
- arch_set_irn_register(cg->arch_env, copy, out_reg);
-
- /* insert copy before the node into the schedule */
- sched_add_before(irn, copy);
-
- /* set copy as in */
- set_irn_n(irn, reqs[i]->same_pos, copy);
- }
- }
- }
- }
- }
+static void remove_unused_nodes(ir_node *irn, bitset_t *already_visited) {
+ int i;
+ ir_mode *mode;
+ ir_node *mem_proj;
- /* If we have a CondJmp with immediate, we need to */
- /* check if it's the right operand, otherwise we have */
- /* to change it, as CMP doesn't support immediate as */
- /* left operands. */
- if (is_ia32_CondJmp(irn) && (is_ia32_ImmConst(irn) || is_ia32_ImmSymConst(irn)) && op_tp == ia32_AddrModeS) {
- long pnc = get_negated_pnc(get_ia32_pncode(irn), get_ia32_res_mode(irn));
- set_ia32_op_type(irn, ia32_AddrModeD);
- set_ia32_pncode(irn, pnc);
- }
+ if (is_Block(irn))
+ return;
- /* check if there is a sub which need to be transformed */
- ia32_transform_sub_to_neg_add(irn, cg);
+ mode = get_irn_mode(irn);
- /* transform a LEA into an Add if possible */
- ia32_transform_lea_to_add(irn, cg);
- }
-end:
+ /* check if we already saw this node or the node has more than one user */
+ if (bitset_contains_irn(already_visited, irn) || get_irn_n_edges(irn) > 1)
+ return;
- /* check for peephole optimization */
- ia32_peephole_optimization(irn, cg);
-}
+ /* mark irn visited */
+ bitset_add_irn(already_visited, irn);
-static void ia32_finish_irg_walker(ir_node *block, void *env) {
- ir_node *irn, *next;
+ /* non-Tuple nodes with one user: ok, return */
+ if (get_irn_n_edges(irn) >= 1 && mode != mode_T)
+ return;
- for (irn = sched_first(block); !sched_is_end(irn); irn = next) {
- next = sched_next(irn);
- ia32_finish_node(irn, env);
+ /* tuple node has one user which is not the mem proj-> ok */
+ if (mode == mode_T && get_irn_n_edges(irn) == 1) {
+ mem_proj = ia32_get_proj_for_mode(irn, mode_M);
+ if (! mem_proj)
+ return;
}
-}
-/**
- * Add Copy nodes for not fulfilled should_be_equal constraints
- */
-static void ia32_finish_irg(ir_graph *irg, ia32_code_gen_t *cg) {
- irg_block_walk_graph(irg, NULL, ia32_finish_irg_walker, cg);
-}
+ for (i = get_irn_arity(irn) - 1; i >= 0; i--) {
+ ir_node *pred = get_irn_n(irn, i);
+ /* do not follow memory edges or we will accidentally remove stores */
+ if (is_Proj(pred) && get_irn_mode(pred) == mode_M)
+ continue;
+ set_irn_n(irn, i, new_Bad());
-/**
- * Dummy functions for hooks we don't need but which must be filled.
- */
-static void ia32_before_sched(void *self) {
+ /*
+ The current node is about to be removed: if the predecessor
+ has only this node as user, it need to be removed as well.
+ */
+ if (get_irn_n_edges(pred) <= 1)
+ remove_unused_nodes(pred, already_visited);
+ }
+
+ if (sched_is_scheduled(irn))
+ sched_remove(irn);
+}
+
+static void remove_unused_loads_walker(ir_node *irn, void *env) {
+ bitset_t *already_visited = env;
+ if (is_ia32_Ld(irn) && ! bitset_contains_irn(already_visited, irn))
+ remove_unused_nodes(irn, env);
}
/**
* simulator and the emitter.
*/
static void ia32_before_ra(void *self) {
- ia32_code_gen_t *cg = self;
+ ia32_code_gen_t *cg = self;
+ bitset_t *already_visited = bitset_irg_malloc(cg->irg);
cg->blk_sched = sched_create_block_schedule(cg->irg);
+
+ /*
+ Handle special case:
+ There are sometimes unused loads, only pinned by memory.
+ We need to remove those Loads and all other nodes which won't be used
+ after removing the Load from schedule.
+ */
+ irg_walk_graph(cg->irg, remove_unused_loads_walker, NULL, already_visited);
+ bitset_free(already_visited);
}
if (mode_is_float(mode)) {
if (USE_SSE2(env->cg))
- new_op = new_rd_ia32_xLoad(env->dbg, env->irg, env->block, ptr, noreg, mem, mode_T);
+ new_op = new_rd_ia32_xLoad(env->dbg, env->irg, env->block, ptr, noreg, mem);
else
- new_op = new_rd_ia32_vfld(env->dbg, env->irg, env->block, ptr, noreg, mem, mode_T);
+ new_op = new_rd_ia32_vfld(env->dbg, env->irg, env->block, ptr, noreg, mem);
}
else {
- new_op = new_rd_ia32_Load(env->dbg, env->irg, env->block, ptr, noreg, mem, mode_T);
+ new_op = new_rd_ia32_Load(env->dbg, env->irg, env->block, ptr, noreg, mem);
}
set_ia32_am_support(new_op, ia32_am_Source);
reg = arch_get_irn_register(env->cg->arch_env, irn);
arch_set_irn_register(env->cg->arch_env, new_op, reg);
- SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, new_op));
+ SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, irn));
exchange(irn, proj);
}
if (mode_is_float(mode)) {
if (USE_SSE2(env->cg))
- new_op = new_rd_ia32_xStore(env->dbg, env->irg, env->block, ptr, noreg, val, nomem, mode_T);
+ new_op = new_rd_ia32_xStore(env->dbg, env->irg, env->block, ptr, noreg, val, nomem);
else
- new_op = new_rd_ia32_vfst(env->dbg, env->irg, env->block, ptr, noreg, val, nomem, mode_T);
+ new_op = new_rd_ia32_vfst(env->dbg, env->irg, env->block, ptr, noreg, val, nomem);
}
else if (get_mode_size_bits(mode) == 8) {
- new_op = new_rd_ia32_Store8Bit(env->dbg, env->irg, env->block, ptr, noreg, val, nomem, mode_T);
+ new_op = new_rd_ia32_Store8Bit(env->dbg, env->irg, env->block, ptr, noreg, val, nomem);
}
else {
- new_op = new_rd_ia32_Store(env->dbg, env->irg, env->block, ptr, noreg, val, nomem, mode_T);
+ new_op = new_rd_ia32_Store(env->dbg, env->irg, env->block, ptr, noreg, val, nomem);
}
set_ia32_am_support(new_op, ia32_am_Dest);
DBG_OPT_SPILL2ST(irn, new_op);
- proj = new_rd_Proj(env->dbg, env->irg, env->block, new_op, mode_M, 0);
+ proj = new_rd_Proj(env->dbg, env->irg, env->block, new_op, mode_M, pn_ia32_Store_M);
if (sched_point) {
sched_add_after(sched_point, new_op);
- sched_add_after(new_op, proj);
-
sched_remove(irn);
}
- SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, new_op));
+ SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, irn));
exchange(irn, proj);
}
transform_to_Load(&tenv);
}
else if (be_is_Spill(node)) {
+ ir_node *spillval = get_irn_n(node, be_pos_Spill_val);
/* we always spill the whole register */
tenv.dbg = get_irn_dbg_info(node);
tenv.irn = node;
- tenv.mode = fix_spill_mode(cg, get_irn_mode(be_get_Spill_context(node)));
+ tenv.mode = fix_spill_mode(cg, get_irn_mode(spillval));
transform_to_Store(&tenv);
}
}
*/
static void ia32_after_ra(void *self) {
ia32_code_gen_t *cg = self;
+
irg_block_walk_graph(cg->irg, NULL, ia32_after_ra_walker, self);
/* if we do x87 code generation, rewrite all the virtual instructions and registers */
- if (cg->used_fp == fp_x87) {
+ if (cg->used_fp == fp_x87 || cg->force_sim) {
x87_simulate_graph(cg->arch_env, cg->irg, cg->blk_sched);
}
}
ir_graph *irg = cg->irg;
ia32_finish_irg(irg, cg);
- be_dump(irg, "-finished", dump_ir_block_graph_sched);
+ if (cg->dump)
+ be_dump(irg, "-finished", dump_ir_block_graph_sched);
ia32_gen_routine(cg->isa->out, irg, cg);
cur_reg_set = NULL;
cg->gp_to_fp = NULL;
cg->fp_kind = isa->fp_kind;
cg->used_fp = fp_none;
+ cg->dump = (birg->main_env->options->dump_flags & DUMP_BE) ? 1 : 0;
FIRM_DBG_REGISTER(cg->mod, "firm.be.ia32.cg");
/* copy optimizations from isa for easier access */
- cg->opt = isa->opt;
+ cg->opt = isa->opt;
+ cg->arch = isa->arch;
+ cg->opt_arch = isa->opt_arch;
/* enter it */
isa->cg = cg;
*
*****************************************************************/
+/**
+ * Set output modes for GCC
+ */
+static const tarval_mode_info mo_integer = {
+ TVO_DECIMAL,
+ NULL,
+ NULL,
+};
+
+/*
+* set the tarval output mode to C-semantics
+*/
+static void set_tarval_output_modes(void)
+{
+ set_tarval_mode_output_option(get_modeLs(), &mo_integer);
+ set_tarval_mode_output_option(get_modeLu(), &mo_integer);
+ set_tarval_mode_output_option(get_modeIs(), &mo_integer);
+ set_tarval_mode_output_option(get_modeIu(), &mo_integer);
+ set_tarval_mode_output_option(get_modeHs(), &mo_integer);
+ set_tarval_mode_output_option(get_modeHu(), &mo_integer);
+ set_tarval_mode_output_option(get_modeBs(), &mo_integer);
+ set_tarval_mode_output_option(get_modeBu(), &mo_integer);
+ set_tarval_mode_output_option(get_modeC(), &mo_integer);
+ set_tarval_mode_output_option(get_modeU(), &mo_integer);
+ set_tarval_mode_output_option(get_modeIu(), &mo_integer);
+}
+
+
/**
* The template that generates a new ISA object.
* Note that this template can be changed by command line
* arguments.
*/
static ia32_isa_t ia32_isa_template = {
- {
- &ia32_isa_if, /* isa interface implementation */
- &ia32_gp_regs[REG_ESP], /* stack pointer register */
- &ia32_gp_regs[REG_EBP], /* base pointer register */
- -1, /* stack direction */
- },
+ {
+ &ia32_isa_if, /* isa interface implementation */
+ &ia32_gp_regs[REG_ESP], /* stack pointer register */
+ &ia32_gp_regs[REG_EBP], /* base pointer register */
+ -1, /* stack direction */
+ },
NULL, /* 16bit register names */
NULL, /* 8bit register names */
NULL, /* types */
NULL, /* tv_ents */
- (0 |
+ (0 |
IA32_OPT_INCDEC | /* optimize add 1, sub 1 into inc/dec default: on */
IA32_OPT_DOAM | /* optimize address mode default: on */
+ IA32_OPT_LEA | /* optimize for LEAs default: on */
IA32_OPT_PLACECNST | /* place constants immediately before instructions, default: on */
IA32_OPT_IMMOPS | /* operations can use immediates, default: on */
IA32_OPT_EXTBB), /* use extended basic block scheduling, default: on */
if (inited)
return NULL;
+ set_tarval_output_modes();
+
isa = xmalloc(sizeof(*isa));
memcpy(isa, &ia32_isa_template, sizeof(*isa));
ia32_register_init(isa);
ia32_create_opcodes();
- ia32_register_copy_attr_func();
if ((ARCH_INTEL(isa->arch) && isa->arch < arch_pentium_4) ||
(ARCH_AMD(isa->arch) && isa->arch < arch_athlon))
/* patch register names of x87 registers */
if (USE_x87(isa)) {
- ia32_st_regs[0].name = "st";
- ia32_st_regs[1].name = "st(1)";
- ia32_st_regs[2].name = "st(2)";
- ia32_st_regs[3].name = "st(3)";
- ia32_st_regs[4].name = "st(4)";
- ia32_st_regs[5].name = "st(5)";
- ia32_st_regs[6].name = "st(6)";
- ia32_st_regs[7].name = "st(7)";
+ ia32_st_regs[0].name = "st";
+ ia32_st_regs[1].name = "st(1)";
+ ia32_st_regs[2].name = "st(2)";
+ ia32_st_regs[3].name = "st(3)";
+ ia32_st_regs[4].name = "st(4)";
+ ia32_st_regs[5].name = "st(5)";
+ ia32_st_regs[6].name = "st(6)";
+ ia32_st_regs[7].name = "st(7)";
}
#ifndef NDEBUG
isa->name_obst_size = 0;
#endif /* NDEBUG */
+ ia32_handle_intrinsics();
+ ia32_switch_section(NULL, NO_SECTION);
fprintf(isa->out, "\t.intel_syntax\n");
inited = 1;
* Return the number of register classes for this architecture.
* We report always these:
* - the general purpose registers
- * - the floating point register set (depending on the unit used for FP)
- * - MMX/SSE registers (currently not supported)
+ * - the SSE floating point register set
+ * - the virtual floating point registers
*/
static int ia32_get_n_reg_class(const void *self) {
- return 2;
+ return 3;
}
/**
* Return the register class for index i.
*/
static const arch_register_class_t *ia32_get_reg_class(const void *self, int i) {
- const ia32_isa_t *isa = self;
- assert(i >= 0 && i < 2 && "Invalid ia32 register class requested.");
+ assert(i >= 0 && i < 3 && "Invalid ia32 register class requested.");
if (i == 0)
return &ia32_reg_classes[CLASS_ia32_gp];
- return USE_SSE2(isa) ? &ia32_reg_classes[CLASS_ia32_xmm] : &ia32_reg_classes[CLASS_ia32_vfp];
+ else if (i == 1)
+ return &ia32_reg_classes[CLASS_ia32_xmm];
+ else
+ return &ia32_reg_classes[CLASS_ia32_vfp];
}
/**
const arch_register_t *reg;
be_abi_call_flags_t call_flags = be_abi_call_get_flags(abi);
+ unsigned use_push = !IS_P6_ARCH(isa->opt_arch);
+
/* set abi flags for calls */
call_flags.bits.left_to_right = 0; /* always last arg first on stack */
- call_flags.bits.store_args_sequential = 0; /* use stores instead of push */
+ call_flags.bits.store_args_sequential = use_push;
/* call_flags.bits.try_omit_fp not changed: can handle both settings */
call_flags.bits.fp_free = 0; /* the frame pointer is fixed in IA32 */
call_flags.bits.call_has_imm = 1; /* IA32 calls can have immediate address */
}
int ia32_to_appear_in_schedule(void *block_env, const ir_node *irn) {
- return is_ia32_irn(irn);
+ return is_ia32_irn(irn) ? 1 : -1;
}
/**
return bytes;
}
+static ia32_intrinsic_env_t intrinsic_env = { NULL, NULL };
+
+/**
+ * Returns the libFirm configuration parameter for this backend.
+ */
+static const backend_params *ia32_get_libfirm_params(void) {
+ static const arch_dep_params_t ad = {
+ 1, /* also use subs */
+ 4, /* maximum shifts */
+ 31, /* maximum shift amount */
+
+ 1, /* allow Mulhs */
+ 1, /* allow Mulus */
+ 32 /* Mulh allowed up to 32 bit */
+ };
+ static backend_params p = {
+ NULL, /* no additional opcodes */
+ NULL, /* will be set later */
+ 1, /* need dword lowering */
+ ia32_create_intrinsic_fkt,
+ &intrinsic_env, /* context for ia32_create_intrinsic_fkt */
+ };
+
+ p.dep_param = &ad;
+ return &p;
+}
#ifdef WITH_LIBCORE
/* instruction set architectures. */
&ia32_isa_template.fp_kind, fp_unit_items
};
+static const lc_opt_enum_int_items_t gas_items[] = {
+ { "linux", ASM_LINUX_GAS },
+ { "mingw", ASM_MINGW_GAS },
+ { NULL, 0 }
+};
+
+static lc_opt_enum_int_var_t gas_var = {
+ (int *)&asm_flavour, gas_items
+};
+
static const lc_opt_table_entry_t ia32_options[] = {
- LC_OPT_ENT_ENUM_INT("arch", "select the instruction architecture", &arch_var),
- LC_OPT_ENT_ENUM_INT("opt", "optimize for instruction architecture", &opt_arch_var),
- LC_OPT_ENT_ENUM_INT("fpunit", "select the floating point unit", &fp_unit_var),
- LC_OPT_ENT_NEGBIT("noaddrmode", "do not use address mode", &ia32_isa_template.opt, IA32_OPT_DOAM),
+ LC_OPT_ENT_ENUM_INT("arch", "select the instruction architecture", &arch_var),
+ LC_OPT_ENT_ENUM_INT("opt", "optimize for instruction architecture", &opt_arch_var),
+ LC_OPT_ENT_ENUM_INT("fpunit", "select the floating point unit", &fp_unit_var),
+ LC_OPT_ENT_NEGBIT("noaddrmode", "do not use address mode", &ia32_isa_template.opt, IA32_OPT_DOAM),
+ LC_OPT_ENT_NEGBIT("nolea", "do not optimize for LEAs", &ia32_isa_template.opt, IA32_OPT_LEA),
LC_OPT_ENT_NEGBIT("noplacecnst", "do not place constants", &ia32_isa_template.opt, IA32_OPT_PLACECNST),
- LC_OPT_ENT_NEGBIT("noimmop", "no operations with immediates", &ia32_isa_template.opt, IA32_OPT_IMMOPS),
- LC_OPT_ENT_NEGBIT("noextbb", "do not use extended basic block scheduling", &ia32_isa_template.opt, IA32_OPT_EXTBB),
+ LC_OPT_ENT_NEGBIT("noimmop", "no operations with immediates", &ia32_isa_template.opt, IA32_OPT_IMMOPS),
+ LC_OPT_ENT_NEGBIT("noextbb", "do not use extended basic block scheduling", &ia32_isa_template.opt, IA32_OPT_EXTBB),
+ LC_OPT_ENT_ENUM_INT("gasmode", "set the GAS compatibility mode", &gas_var),
{ NULL }
};
* ia32-fpunit=unit select floating point unit (x87 or SSE2)
* ia32-incdec optimize for inc/dec
* ia32-noaddrmode do not use address mode
+ * ia32-nolea do not optimize for LEAs
* ia32-noplacecnst do not place constants,
* ia32-noimmop no operations with immediates
* ia32-noextbb do not use extended basic block scheduling
+ * ia32-gasmode set the GAS compatibility mode
*/
static void ia32_register_options(lc_opt_entry_t *ent)
{
ia32_get_code_generator_if,
ia32_get_list_sched_selector,
ia32_get_reg_class_alignment,
+ ia32_get_libfirm_params,
#ifdef WITH_LIBCORE
ia32_register_options
#endif
projects / libfirm / blobdiff