* Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
*/
+ /**
+ * @file irouts.c Compute out edges for ir nodes (also called def-use edges).
+ *
+ * Copyright (C) 2002 by Universitaet Karlsruhe
+ * All rights reserved.
+ *
+ * Authors: Goetz Lindenmaier
+ */
-
- /* Copyright (C) 2002 by Universitaet Karlsruhe
-* All rights reserved.
-*
-* Authors: Goetz Lindenmaier
-*
-* irouts.c --- Compute out edges for ir nodes (also called def-use
-* edges).
-*
-*/
-
-/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif /* defined HAVE_CONFIG_H */
+#endif
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#include "xmalloc.h"
#include "irouts.h"
#include "irnode_t.h"
#include "irgraph_t.h"
#include "irprog_t.h"
#include "irgwalk.h"
-#include "string.h"
#ifdef DEBUG_libfirm
/* Note: ir_node.out_valid and ir_graph.n_outs are only present when DEBUG_libfirm is defined */
when compiling with neither DEBUG_libfirm or NDEBUG defined */
#endif /* defined DEBUG_libfirm */
-/**********************************************************************/
+/*--------------------------------------------------------------------*/
/** Accessing the out datastructures **/
-/**********************************************************************/
+/*--------------------------------------------------------------------*/
+/** Clear the outs of a node */
static void reset_outs (ir_node *node, void *unused)
{
node->out = NULL;
}
/* returns the number of successors of the node: */
-INLINE int get_irn_n_outs (ir_node *node) {
+int get_irn_n_outs (ir_node *node) {
+ assert(node && node->kind == k_ir_node);
#ifdef DEBUG_libfirm
/* assert (node->out_valid); */
#endif /* defined DEBUG_libfirm */
}
/* Access successor n */
-INLINE ir_node *get_irn_out (ir_node *node, int pos) {
- assert(node);
+ir_node *get_irn_out (ir_node *node, int pos) {
assert(pos >= 0 && pos < get_irn_n_outs(node));
#ifdef DEBUG_libfirm
/* assert (node->out_valid); */
return node->out[pos+1];
}
-INLINE void set_irn_out (ir_node *node, int pos, ir_node *out) {
+void set_irn_out (ir_node *node, int pos, ir_node *out) {
assert(node && out);
assert(pos >= 0 && pos < get_irn_n_outs(node));
#ifdef DEBUG_libfirm
}
-INLINE int get_Block_n_cfg_outs (ir_node *bl) {
+int get_Block_n_cfg_outs (ir_node *bl) {
int i, n_cfg_outs = 0;
assert(bl && (get_irn_op(bl) == op_Block));
#ifdef DEBUG_libfirm
#endif /* defined DEBUG_libfirm */
for (i = 0; i < (int)bl->out[0]; i++)
if ((get_irn_mode(bl->out[i+1]) == mode_X) &&
- (get_irn_op(bl->out[i+1]) != op_End)) n_cfg_outs++;
+ (get_irn_op(bl->out[i+1]) != op_End))
+ n_cfg_outs++;
return n_cfg_outs;
}
-INLINE ir_node *get_Block_cfg_out (ir_node *bl, int pos) {
+ir_node *get_Block_cfg_out (ir_node *bl, int pos) {
int i, out_pos = 0;
assert(bl && (get_irn_op(bl) == op_Block));
#ifdef DEBUG_libfirm
#endif /* defined DEBUG_libfirm */
for (i = 0; i < (int)bl->out[0]; i++)
if ((get_irn_mode(bl->out[i+1]) == mode_X) &&
- (get_irn_op(bl->out[i+1]) != op_End)) {
+ (get_irn_op(bl->out[i+1]) != op_End)) {
if (out_pos == pos) {
- ir_node *cfop = bl->out[i+1];
- return cfop->out[0+1];
+ ir_node *cfop = bl->out[i+1];
+ return cfop->out[0+1];
} else {
out_pos++;
}
return NULL;
}
-void irg_out_walk_2(ir_node *node, irg_walk_func *pre,
+static void irg_out_walk_2(ir_node *node, irg_walk_func *pre,
irg_walk_func *post, void *env) {
int i;
ir_node *succ;
return;
}
-void irg_out_block_walk2(ir_node *bl,
+static void irg_out_block_walk2(ir_node *bl,
irg_walk_func *pre, irg_walk_func *post,
void *env) {
int i;
}
-/**********************************************************************/
+/*--------------------------------------------------------------------*/
/** Building and Removing the out datasturcture **/
/** **/
/** The outs of a graph are allocated in a single, large array. **/
/** the large array into smaller parts, sets the out edges and **/
/** recounts the out edges. **/
/** Removes Tuple nodes! **/
-/**********************************************************************/
+/*--------------------------------------------------------------------*/
-/* Returns the amount of out edges for not yet visited successors. */
+/** Returns the amount of out edges for not yet visited successors. */
static int count_outs(ir_node *n) {
int start, i, res, irn_arity;
- ir_node *succ;
set_irn_visited(n, get_irg_visited(current_ir_graph));
n->out = (ir_node **) 1; /* Space for array size. */
- start = get_irn_op(n) == op_Block ? 0 : -1;
+ start = is_Block(n) ? 0 : -1;
irn_arity = get_irn_arity(n);
- res = irn_arity - start +1; /* --1 or --0; 1 for array size. */
+ res = irn_arity - start + 1; /* --1 or --0; 1 for array size. */
+
for (i = start; i < irn_arity; i++) {
/* Optimize Tuples. They annoy if walking the cfg. */
- succ = skip_Tuple(get_irn_n(n, i));
+ ir_node *succ = skip_Tuple(get_irn_n(n, i));
set_irn_n(n, i, succ);
+
/* count outs for successors */
if (get_irn_visited(succ) < get_irg_visited(current_ir_graph)) {
res += count_outs(succ);
}
/* Count my outs */
- succ->out = (ir_node **)( (int)succ->out +1);
+ succ->out = (ir_node **)( (int)succ->out + 1);
}
return res;
}
+/**
+ * Enter memory for the outs to a node.
+ *
+ * @param n current node
+ * @param free current free address in the chunk allocated for the outs
+ *
+ * @return The next free address
+ */
static ir_node **set_out_edges(ir_node *n, ir_node **free) {
int n_outs, start, i, irn_arity;
ir_node *succ;
#ifdef DEBUG_libfirm
n->out_valid = 1;
#endif /* defined DEBUG_libfirm */
- free = &free[n_outs];
+ free += n_outs;
/* We count the successors again, the space will be sufficient.
We use this counter to remember the position for the next back
edge. */
n->out[0] = (ir_node *)0;
- if (get_irn_op(n) == op_Block) start = 0; else start = -1;
+ start = is_Block(n) ? 0 : -1;
irn_arity = get_irn_arity(n);
+
for (i = start; i < irn_arity; i++) {
succ = get_irn_n(n, i);
/* Recursion */
return free;
}
+/* We want that the out of ProjX from Start contains the next block at
+ position 1, the Start block at position 2. This is necessary for
+ the out block walker. */
static INLINE void fix_start_proj(ir_graph *irg) {
- ir_node *proj = NULL, *startbl;
+ ir_node *proj = NULL;
+ ir_node *startbl = get_irg_start_block(irg);
int i;
- if (get_Block_n_cfg_outs(get_irg_start_block(irg))) {
- startbl = get_irg_start_block(irg);
+
+ if (get_Block_n_cfg_outs(startbl)) {
for (i = 0; i < get_irn_n_outs(startbl); i++)
- if (get_irn_mode(get_irn_out(startbl, i)) == mode_X)
+ if (get_irn_mode(get_irn_out(startbl, i)) == mode_X) {
proj = get_irn_out(startbl, i);
+ break;
+ }
+
if (get_irn_out(proj, 0) == startbl) {
assert(get_irn_n_outs(proj) == 2);
set_irn_out(proj, 0, get_irn_out(proj, 1));
}
}
+/* compute the outs for a given graph */
void compute_outs(ir_graph *irg) {
ir_graph *rem = current_ir_graph;
int n_out_edges = 0;
/* Update graph state */
assert(get_irg_phase_state(current_ir_graph) != phase_building);
- if (current_ir_graph->outs_state != outs_none) free_outs(current_ir_graph);
+
+ if (current_ir_graph->outs_state != outs_none)
+ free_outs(current_ir_graph);
current_ir_graph->outs_state = outs_consistent;
/* This first iteration counts the overall number of out edges and the
n_out_edges = count_outs(get_irg_end(irg));
/* allocate memory for all out edges. */
- irg->outs = (ir_node **) xmalloc (n_out_edges * sizeof(ir_node *));
+ irg->outs = xcalloc(n_out_edges, sizeof(irg->outs[0]));
#ifdef DEBUG_libfirm
irg->n_outs = n_out_edges;
#endif /* defined DEBUG_libfirm */
inc_irg_visited(irg);
end = set_out_edges(get_irg_end(irg), irg->outs);
-#ifdef DEBUG_libfirm
/* Check how much memory we have used */
assert (end == (irg->outs + n_out_edges));
-#endif /* defined DEBUG_libfirm */
/* We want that the out of ProjX from Start contains the next block at
position 1, the Start block at position 2. This is necessary for
*------------------------------------------------------------*/
-/* ------------------------------------------
- Inits the number of outedges for each node
- before counting.
- ------------------------------------------ */
-
-static void init_count(ir_node * node, void * env)
-{
+/**
+ * Inits the number of outedges for each node
+ * before counting.
+ */
+static void init_count(ir_node * node, void *env) {
node->out = (ir_node **) 1; /* 1 for the array size */
}
-/* -----------------------------------------------
- Adjusts the out edge count for its predecessors
- and adds the current arity to the overall count,
- which is saved in "env"
- ------------------------------------------------ */
-
+/**
+ * Adjusts the out edge count for its predecessors
+ * and adds the current arity to the overall count,
+ * which is saved in "env"
+ */
static void node_arity_count(ir_node * node, void * env)
{
int *anz = (int *) env, arity, n_outs, i, start;
}
-/* ----------------------------------------
- Inits all nodes for setting the outedges
- Returns the overall count of edges
- ---------------------------------------- */
-
+/*
+ * Inits all nodes for setting the outedges
+ * Returns the overall count of edges
+ */
int count_ip_outs(void) {
int res = 0;
return(res);
}
-int dummy_count = 0, global_count; /* Only for debugging */
-
-/* ---------------------------------------------
- For each node: Sets the pointer to array
- in which the outedges are written later.
- The current array start is transported in env
- --------------------------------------------- */
+static int dummy_count = 0, global_count; /* Only for debugging */
+/**
+ * For each node: Sets the pointer to array
+ * in which the outedges are written later.
+ * The current array start is transported in env
+ */
static void set_array_pointer(ir_node *node, void *env) {
int n_outs;
}
-/* -------------------------------------------
- Adds an outedge from the predecessor to the
- current node.
- ------------------------------------------- */
-
+/**
+ * Adds an outedge from the predecessor to the
+ * current node.
+ */
static void set_out_pointer(ir_node * node, void * env) {
int i, arity = get_irn_arity(node);
ir_node *succ;
}
-/* -------------------------------
- Sets the outedges for all nodes.
- -------------------------------- */
-
+/*
+ * Sets the outedges for all nodes.
+ */
void set_ip_outs(void)
{
ir_node **outedge_array = get_irp_ip_outedges();
-/* --------------------------------------------------------
- Counts the outedges, allocates memory to save the
- outedges and fills this outedge array in interprocedural
- view!
- -------------------------------------------------------- */
-
+/*
+ * Counts the outedges, allocates memory to save the
+ * outedges and fills this outedge array in interprocedural
+ * view!
+ */
void compute_ip_outs(void) {
int n_out_edges;
}
global_count = n_out_edges = count_ip_outs();
- out_edges = (ir_node **) malloc (n_out_edges * sizeof(ir_node *));
+ out_edges = xcalloc(n_out_edges, sizeof(out_edges[0]));
set_irp_ip_outedges(out_edges);
set_ip_outs();
}
projects / libfirm / blobdiff