/*
- * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
/**
* @file
+ * @brief lowers operations with mode_b. The result is a graph which
+ * might still contains some convs from/to mode_b, but no
+ * operations are performed on them anymore, they are just there
+ * so modes match. A backend can safely skip all mode_b convs.
* @author Matthias Braun, Christoph Mallon
* @version $Id$
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
#include <stdlib.h>
#include "irnode_t.h"
#include "ircons_t.h"
+#include "irflag.h"
#include "irgwalk.h"
#include "irtools.h"
#include "iredges.h"
#include "error.h"
#include "lowering.h"
#include "pdeq.h"
+#include "irpass_t.h"
static lower_mode_b_config_t config;
static ir_type *lowered_type = NULL;
static ir_node *create_not(dbg_info *dbgi, ir_node *node)
{
- ir_graph *irg = current_ir_graph;
ir_node *block = get_nodes_block(node);
ir_mode *mode = config.lowered_mode;
tarval *tv_one = get_tarval_one(mode);
- ir_node *one = new_d_Const(dbgi, mode, tv_one);
+ ir_node *one = new_d_Const(dbgi, tv_one);
- return new_rd_Eor(dbgi, irg, block, node, one, mode);
+ return new_rd_Eor(dbgi, block, node, one, mode);
}
static ir_node *create_convb(ir_node *node)
{
- ir_graph *irg = current_ir_graph;
ir_node *block = get_nodes_block(node);
- ir_node *conv = new_rd_Conv(NULL, irg, block, node, mode_b);
+ ir_node *conv = new_rd_Conv(NULL, block, node, mode_b);
return conv;
}
*/
static ir_node *create_set(ir_node *node)
{
- ir_graph *irg = current_ir_graph;
dbg_info *dbgi = get_irn_dbg_info(node);
ir_mode *mode = config.lowered_set_mode;
tarval *tv_one = get_tarval_one(mode);
- ir_node *one = new_d_Const(dbgi, mode, tv_one);
+ ir_node *one = new_d_Const(dbgi, tv_one);
ir_node *block = get_nodes_block(node);
tarval *tv_zero = get_tarval_null(mode);
- ir_node *zero = new_d_Const(dbgi, mode, tv_zero);
+ ir_node *zero = new_d_Const(dbgi, tv_zero);
- ir_node *vals[2] = { one, zero };
- ir_node *set = new_rd_Psi(dbgi, irg, block, 1, &node, vals, mode);
+ ir_node *set = new_rd_Mux(dbgi, block, node, zero, one, mode);
- if(mode != config.lowered_mode) {
- set = new_r_Conv(irg, block, set, config.lowered_mode);
+ if (mode != config.lowered_mode) {
+ set = new_r_Conv(block, set, config.lowered_mode);
}
return set;
static ir_node *lower_node(ir_node *node)
{
- ir_graph *irg = current_ir_graph;
dbg_info *dbgi = get_irn_dbg_info(node);
- ir_op *op = get_irn_op(node);
ir_node *block = get_nodes_block(node);
ir_mode *mode = config.lowered_mode;
ir_node *res;
return res;
/* TODO: be robust against phi-loops... */
- if(op == op_Phi) {
+ switch (get_irn_opcode(node)) {
+ case iro_Phi: {
int i, arity;
ir_node **in;
ir_node *unknown, *new_phi;
- arity = get_irn_arity(node);
- in = alloca(arity * sizeof(in[0]));
+ arity = get_irn_arity(node);
+ in = ALLOCAN(ir_node*, arity);
unknown = new_Unknown(config.lowered_mode);
for(i = 0; i < arity; ++i) {
in[i] = unknown;
}
- new_phi = new_r_Phi(irg, block, arity, in, config.lowered_mode);
+ new_phi = new_r_Phi(block, arity, in, config.lowered_mode);
set_irn_link(node, new_phi);
pdeq_putr(lowered_nodes, node);
return new_phi;
}
- if(op == op_And || op == op_Or || op == op_Eor) {
+ case iro_And:
+ case iro_Or:
+ case iro_Eor: {
int i, arity;
ir_node *copy = exact_copy(node);
pdeq_putr(lowered_nodes, node);
return copy;
}
- if(op == op_Not) {
+ case iro_Not: {
ir_node *op = get_Not_op(node);
ir_node *low_op = lower_node(op);
pdeq_putr(lowered_nodes, node);
return res;
}
- if(op == op_Psi) {
- ir_node *cond = get_Psi_cond(node, 0);
+ case iro_Mux: {
+ ir_node *cond = get_Mux_sel(node);
ir_node *low_cond = lower_node(cond);
- ir_node *v_true = get_Psi_val(node, 0);
+ ir_node *v_true = get_Mux_true(node);
ir_node *low_v_true = lower_node(v_true);
- ir_node *v_false = get_Psi_default(node);
+ ir_node *v_false = get_Mux_false(node);
ir_node *low_v_false = lower_node(v_false);
- ir_node *and0 = new_rd_And(dbgi, irg, block, low_cond, low_v_true,
- mode);
-
+ ir_node *and0 = new_rd_And(dbgi, block, low_cond, low_v_true, mode);
ir_node *not_cond = create_not(dbgi, low_cond);
-
- ir_node *and1 = new_rd_And(dbgi, irg, block, not_cond, low_v_false,
- mode);
-
- ir_node *or = new_rd_Or(dbgi, irg, block, and0, and1,
- mode);
+ ir_node *and1 = new_rd_And(dbgi, block, not_cond, low_v_false, mode);
+ ir_node *or = new_rd_Or(dbgi, block, and0, and1, mode);
set_irn_link(node, or);
pdeq_putr(lowered_nodes, node);
return or;
}
- if(op == op_Conv) {
+ case iro_Conv: {
ir_node *pred = get_Conv_op(node);
ir_mode *mode = get_irn_mode(pred);
tarval *tv_zeroc = get_tarval_null(mode);
- ir_node *zero_cmp = new_d_Const(dbgi, mode, tv_zeroc);
+ ir_node *zero_cmp = new_d_Const(dbgi, tv_zeroc);
ir_node *set;
- ir_node *cmp = new_rd_Cmp(dbgi, irg, block, pred, zero_cmp);
- ir_node *proj = new_rd_Proj(dbgi, irg, block, cmp, mode_b,
- pn_Cmp_Lg);
+ ir_node *cmp = new_rd_Cmp(dbgi, block, pred, zero_cmp);
+ ir_node *proj = new_rd_Proj(dbgi, block, cmp, mode_b, pn_Cmp_Lg);
set = create_set(proj);
set_irn_link(node, set);
pdeq_putr(lowered_nodes, node);
return set;
}
- if(op == op_Proj) {
+ case iro_Proj: {
ir_node *pred = get_Proj_pred(node);
if(is_Cmp(pred)) {
if(a != NULL) {
int bits = get_mode_size_bits(mode);
tarval *tv = new_tarval_from_long(bits-1, mode_Iu);
- ir_node *shift_cnt = new_d_Const(dbgi, mode_Iu, tv);
+ ir_node *shift_cnt = new_d_Const(dbgi, tv);
if(cmp_mode != mode) {
- a = new_rd_Conv(dbgi, irg, block, a, mode);
- b = new_rd_Conv(dbgi, irg, block, b, mode);
+ a = new_rd_Conv(dbgi, block, a, mode);
+ b = new_rd_Conv(dbgi, block, b, mode);
}
- res = new_rd_Sub(dbgi, irg, block, a, b, mode);
+ res = new_rd_Sub(dbgi, block, a, b, mode);
if(need_not) {
- res = new_rd_Not(dbgi, irg, block, res, mode);
+ res = new_rd_Not(dbgi, block, res, mode);
}
- res = new_rd_Shr(dbgi, irg, block, res, shift_cnt, mode);
+ res = new_rd_Shr(dbgi, block, res, shift_cnt, mode);
set_irn_link(node, res);
pdeq_putr(lowered_nodes, node);
set_irn_mode(node, mode);
return node;
} else if(is_Proj(pred) && is_Start(get_Proj_pred(pred))) {
- ir_entity *entity = get_irg_entity(irg);
+ ir_entity *entity = get_irg_entity(current_ir_graph);
ir_type *type = get_entity_type(entity);
adjust_method_type(type);
set_irn_mode(node, mode);
panic("unexpected projb: %+F (pred: %+F)", node, pred);
}
- if(op == op_Const) {
+ case iro_Const: {
tarval *tv = get_Const_tarval(node);
if(tv == get_tarval_b_true()) {
tarval *tv_one = get_tarval_one(mode);
- res = new_d_Const(dbgi, mode, tv_one);
+ res = new_d_Const(dbgi, tv_one);
} else if(tv == get_tarval_b_false()) {
tarval *tv_zero = get_tarval_null(mode);
- res = new_d_Const(dbgi, mode, tv_zero);
+ res = new_d_Const(dbgi, tv_zero);
} else {
panic("invalid boolean const %+F", node);
}
pdeq_putr(lowered_nodes, node);
return res;
}
- if (op == op_Unknown) {
+ case iro_Unknown:
return new_Unknown(config.lowered_mode);
+ default:
+ panic("didn't expect %+F to have mode_b", node);
}
-
- panic("didn't expect %+F to have mode_b", node);
}
static void lower_mode_b_walker(ir_node *node, void *env)
continue;
if(! config.lower_direct_cmp) {
- if(is_Cond(node)
- || (is_Psi(node) && get_irn_mode(node) != mode_b)) {
+ if (is_Cond(node) ||
+ (is_Mux(node) && get_irn_mode(node) != mode_b)) {
if(is_Proj(in)) {
ir_node *pred = get_Proj_pred(in);
if(is_Cmp(pred))
{
config = *nconfig;
lowered_nodes = new_pdeq();
- set_using_irn_link(irg);
+ /* ensure no optimisation touches muxes anymore */
+ set_irg_state(irg, IR_GRAPH_STATE_KEEP_MUX);
+
+ ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK);
+
+ set_opt_allow_conv_b(0);
irg_walk_graph(irg, clear_links, NULL, NULL);
irg_walk_graph(irg, lower_mode_b_walker, NULL, NULL);
}
del_pdeq(lowered_nodes);
- clear_using_irn_link(irg);
+ ir_free_resources(irg, IR_RESOURCE_IRN_LINK);
+}
+
+struct pass_t {
+ ir_graph_pass_t pass;
+ const lower_mode_b_config_t *config;
+};
+
+/**
+ * Wrapper to run ir_lower_mode_b() as an ir_graph pass
+ */
+static int pass_wrapper(ir_graph *irg, void *context) {
+ struct pass_t *pass = context;
+
+ ir_lower_mode_b(irg, pass->config);
+ return 0;
+}
+
+ir_graph_pass_t *ir_lower_mode_b_pass(
+ const char *name, const lower_mode_b_config_t *config) {
+ struct pass_t *pass = XMALLOCZ(struct pass_t);
+
+ pass->config = config;
+ return def_graph_pass_constructor(
+ &pass->pass, name ? name : "lower_mode_b", pass_wrapper);
}
projects / libfirm / blobdiff