X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fana%2Firouts.c;h=cb32aa994802f2c7cae935687f7aaf5727a2f2a9;hb=70cfa8796df2436b48a224e0568f5ee0b595dfb0;hp=f5eba03ae57f315efafa26cad545b1a0a764fcfe;hpb=bb9f2e36362333c6635b89f5258171b06c786608;p=libfirm

diff --git a/ir/ana/irouts.c b/ir/ana/irouts.c
index f5eba03ae..cb32aa994 100644
--- a/ir/ana/irouts.c
+++ b/ir/ana/irouts.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
+ * Copyright (C) 1995-2011 University of Karlsruhe.  All right reserved.
  *
  * This file is part of libFirm.
  *
@@ -26,9 +26,7 @@
  */
 #include "config.h"
 
-#ifdef HAVE_STRING_H
 #include <string.h>
-#endif
 
 #include "xmalloc.h"
 #include "irouts.h"
@@ -52,7 +50,8 @@
 
 #ifdef DEBUG_libfirm
 /** Clear the outs of a node */
-static void reset_outs(ir_node *node, void *unused) {
+static void reset_outs(ir_node *node, void *unused)
+{
 	(void) unused;
 	node->out       = NULL;
 	node->out_valid = 0;
@@ -65,7 +64,8 @@ int get_irn_outs_computed(const ir_node *node)
 }
 
 /* returns the number of successors of the node: */
-int get_irn_n_outs(const ir_node *node) {
+int get_irn_n_outs(const ir_node *node)
+{
 	assert(node && node->kind == k_ir_node);
 #ifdef DEBUG_libfirm
 	/* assert(node->out_valid); */
@@ -75,7 +75,8 @@ int get_irn_n_outs(const ir_node *node) {
 }
 
 /* Access successor n */
-ir_node *get_irn_out(const ir_node *def, int pos) {
+ir_node *get_irn_out(const ir_node *def, int pos)
+{
 	assert(pos >= 0 && pos < get_irn_n_outs(def));
 #ifdef DEBUG_libfirm
 	/* assert(def->out_valid); */
@@ -84,7 +85,8 @@ ir_node *get_irn_out(const ir_node *def, int pos) {
 }
 
 /* Access successor n */
-ir_node *get_irn_out_ex(const ir_node *def, int pos, int *in_pos) {
+ir_node *get_irn_out_ex(const ir_node *def, int pos, int *in_pos)
+{
 	assert(pos >= 0 && pos < get_irn_n_outs(def));
 #ifdef DEBUG_libfirm
 	/* assert(def->out_valid); */
@@ -93,7 +95,8 @@ ir_node *get_irn_out_ex(const ir_node *def, int pos, int *in_pos) {
 	return def->out[pos+1].use;
 }
 
-void set_irn_out(ir_node *def, int pos, ir_node *use, int in_pos) {
+void set_irn_out(ir_node *def, int pos, ir_node *use, int in_pos)
+{
 	assert(def && use);
 	assert(pos >= 0 && pos < get_irn_n_outs(def));
 #ifdef DEBUG_libfirm
@@ -104,7 +107,8 @@ void set_irn_out(ir_node *def, int pos, ir_node *use, int in_pos) {
 }
 
 /* Return the number of control flow successors, ignore keep-alives. */
-int get_Block_n_cfg_outs(const ir_node *bl) {
+int get_Block_n_cfg_outs(const ir_node *bl)
+{
 	int i, n_cfg_outs = 0;
 	assert(bl && is_Block(bl));
 #ifdef DEBUG_libfirm
@@ -119,7 +123,8 @@ int get_Block_n_cfg_outs(const ir_node *bl) {
 }
 
 /* Return the number of control flow successors, honor keep-alives. */
-int get_Block_n_cfg_outs_ka(const ir_node *bl) {
+int get_Block_n_cfg_outs_ka(const ir_node *bl)
+{
 	int i, n_cfg_outs = 0;
 	assert(bl && is_Block(bl));
 #ifdef DEBUG_libfirm
@@ -143,7 +148,8 @@ int get_Block_n_cfg_outs_ka(const ir_node *bl) {
 }
 
 /* Access predecessor n, ignore keep-alives. */
-ir_node *get_Block_cfg_out(const ir_node *bl, int pos) {
+ir_node *get_Block_cfg_out(const ir_node *bl, int pos)
+{
 	int i;
 	assert(bl && is_Block(bl));
 #ifdef DEBUG_libfirm
@@ -163,7 +169,8 @@ ir_node *get_Block_cfg_out(const ir_node *bl, int pos) {
 }
 
 /* Access predecessor n, honor keep-alives. */
-ir_node *get_Block_cfg_out_ka(const ir_node *bl, int pos) {
+ir_node *get_Block_cfg_out_ka(const ir_node *bl, int pos)
+{
 	int i, n_outs;
 	assert(bl && is_Block(bl));
 #ifdef DEBUG_libfirm
@@ -196,7 +203,8 @@ ir_node *get_Block_cfg_out_ka(const ir_node *bl, int pos) {
 }
 
 static void irg_out_walk_2(ir_node *node, irg_walk_func *pre,
-            irg_walk_func *post, void *env) {
+                           irg_walk_func *post, void *env)
+{
 	int     i, n;
 	ir_node *succ;
 
@@ -216,9 +224,9 @@ static void irg_out_walk_2(ir_node *node, irg_walk_func *pre,
 	if (post) post(node, env);
 }
 
-void irg_out_walk(ir_node *node,
-                  irg_walk_func *pre, irg_walk_func *post,
-                  void *env) {
+void irg_out_walk(ir_node *node, irg_walk_func *pre, irg_walk_func *post,
+                  void *env)
+{
 	assert(node);
 	if (get_irg_outs_state(current_ir_graph) != outs_none) {
 		inc_irg_visited (current_ir_graph);
@@ -226,9 +234,9 @@ void irg_out_walk(ir_node *node,
 	}
 }
 
-static void irg_out_block_walk2(ir_node *bl,
-                                irg_walk_func *pre, irg_walk_func *post,
-                                void *env) {
+static void irg_out_block_walk2(ir_node *bl, irg_walk_func *pre,
+                                irg_walk_func *post, void *env)
+{
 	int i, n;
 
 	if (!Block_block_visited(bl)) {
@@ -249,11 +257,11 @@ static void irg_out_block_walk2(ir_node *bl,
 	}
 }
 
-/* Walks only over Block nodes in the graph.  Has it's own visited
+/* Walks only over Block nodes in the graph.  Has its own visited
    flag, so that it can be interleaved with the other walker.         */
-void irg_out_block_walk(ir_node *node,
-                        irg_walk_func *pre, irg_walk_func *post,
-                        void *env) {
+void irg_out_block_walk(ir_node *node, irg_walk_func *pre, irg_walk_func *post,
+                        void *env)
+{
 
 	assert(is_Block(node) || (get_irn_mode(node) == mode_X));
 
@@ -264,8 +272,7 @@ void irg_out_block_walk(ir_node *node,
 
 		for (i = 0, n = get_irn_n_outs(node); i < n; ++i) {
 			ir_node *succ = get_irn_out(node, i);
-			if (get_irn_visited(succ) < get_irg_visited(current_ir_graph))
-				irg_out_walk_2(succ, pre, post, env);
+			irg_out_block_walk2(succ, pre, post, env);
 		}
 	}
 	else {
@@ -294,11 +301,12 @@ void irg_out_block_walk(ir_node *node,
 
 
 /** Returns the amount of out edges for not yet visited successors. */
-static int _count_outs(ir_node *n) {
+static int _count_outs(ir_node *n)
+{
 	int start, i, res, irn_arity;
 
 	mark_irn_visited(n);
-	n->out = INT_TO_PTR(1);     /* Space for array size. */
+	n->out = (ir_def_use_edge*) INT_TO_PTR(1);     /* Space for array size. */
 
 	start = is_Block(n) ? 0 : -1;
 	irn_arity = get_irn_arity(n);
@@ -318,7 +326,7 @@ static int _count_outs(ir_node *n) {
 			res += _count_outs(skipped_pred);
 
 		/*count my Def-Use edges */
-		skipped_pred->out = INT_TO_PTR(PTR_TO_INT(skipped_pred->out) + 1);
+		skipped_pred->out = (ir_def_use_edge*) INT_TO_PTR(PTR_TO_INT(skipped_pred->out) + 1);
 	}
 	return res;
 }
@@ -327,7 +335,8 @@ static int _count_outs(ir_node *n) {
 /** Returns the amount of out edges for not yet visited successors.
  *  This version handles some special nodes like irg_frame, irg_args etc.
  */
-static int count_outs(ir_graph *irg) {
+static int count_outs(ir_graph *irg)
+{
 	ir_node *n;
 	int     i, res;
 
@@ -339,7 +348,7 @@ static int count_outs(ir_graph *irg) {
 	for (i = anchor_last - 1; i >= 0; --i) {
 		n = get_irg_anchor(irg, i);
 		if (!irn_visited_else_mark(n)) {
-			n->out = INT_TO_PTR(1);
+			n->out = (ir_def_use_edge*) INT_TO_PTR(1);
 			++res;
 		}
 	}
@@ -354,8 +363,10 @@ static int count_outs(ir_graph *irg) {
  *
  * @return The next free address
  */
-static ir_def_use_edge *_set_out_edges(ir_node *use, ir_def_use_edge *free) {
-	int     n_outs, start, i, irn_arity, pos;
+static ir_def_use_edge *_set_out_edges(ir_node *use, ir_def_use_edge *free)
+{
+	int    start, i, irn_arity, pos;
+	size_t n_outs;
 
 	mark_irn_visited(use);
 
@@ -400,9 +411,10 @@ static ir_def_use_edge *_set_out_edges(ir_node *use, ir_def_use_edge *free) {
  *
  * @return The next free address
  */
-static ir_def_use_edge *set_out_edges(ir_graph *irg, ir_def_use_edge *free) {
+static ir_def_use_edge *set_out_edges(ir_graph *irg, ir_def_use_edge *free)
+{
 	ir_node *n;
-	int     i, n_outs;
+	int     i;
 
 	inc_irg_visited(irg);
 	free = _set_out_edges(get_irg_end(irg), free);
@@ -411,7 +423,7 @@ static ir_def_use_edge *set_out_edges(ir_graph *irg, ir_def_use_edge *free) {
 	for (i = anchor_last - 1; i >= 0; --i) {
 		n = get_irg_anchor(irg, i);
 		if (!irn_visited_else_mark(n)) {
-			n_outs = PTR_TO_INT(n->out);
+			size_t n_outs = PTR_TO_INT(n->out);
 			n->out = free;
 #ifdef DEBUG_libfirm
 			n->out_valid = 1;
@@ -423,34 +435,9 @@ static ir_def_use_edge *set_out_edges(ir_graph *irg, ir_def_use_edge *free) {
 	return free;
 }
 
-
-/**
- * We want that the out of ProjX from Start contains the next block at
- * position 0, the Start block at position 1.  This is necessary for
- * the out block walker.
- */
-static inline void fix_start_proj(ir_graph *irg) {
-	ir_node *startbl = get_irg_start_block(irg);
-
-	if (get_Block_n_cfg_outs(startbl)) {
-		ir_node *proj = get_irg_initial_exec(irg);
-		ir_node *irn;
-		int     block_pos, other_pos;
-
-		if (get_irn_n_outs(proj) == 2) {
-			if (get_irn_out_ex(proj, 0, &block_pos) == startbl) {
-				irn = get_irn_out_ex(proj, 1, &other_pos);
-				set_irn_out(proj, 0, irn, other_pos);
-				set_irn_out(proj, 1, startbl, block_pos);
-			}
-		} else {
-			assert(get_irg_phase_state(irg) == phase_backend);
-		}
-	}
-}
-
 /* compute the outs for a given graph */
-void compute_irg_outs(ir_graph *irg) {
+void compute_irg_outs(ir_graph *irg)
+{
 	ir_graph        *rem = current_ir_graph;
 	int             n_out_edges = 0;
 	ir_def_use_edge *end = NULL;         /* Only for debugging */
@@ -480,172 +467,32 @@ void compute_irg_outs(ir_graph *irg) {
 	/* Check how much memory we have used */
 	assert (end == (irg->outs + n_out_edges));
 
-	/* We want that the out of ProjX from Start contains the next block at
-	   position 0, the Start block at position 1.  This is necessary for
-	   code placement (place_early() ONLY if started GCSE on graphs with dead blocks) */
-	fix_start_proj(irg);
-
 	current_ir_graph->outs_state = outs_consistent;
 	current_ir_graph = rem;
 }
 
-void assure_irg_outs(ir_graph *irg) {
+void assure_irg_outs(ir_graph *irg)
+{
 	if (get_irg_outs_state(irg) != outs_consistent)
 		compute_irg_outs(irg);
 }
 
-void compute_irp_outs(void) {
-	int i;
-	for (i = get_irp_n_irgs() -1; i >= 0; --i)
+void compute_irp_outs(void)
+{
+	size_t i, n;
+	for (i = 0, n = get_irp_n_irgs(); i < n; ++i)
 		compute_irg_outs(get_irp_irg(i));
 }
 
-void free_irp_outs(void) {
-	int i;
-	for (i = get_irp_n_irgs() -1; i >= 0; --i)
+void free_irp_outs(void)
+{
+	size_t i, n;
+	for (i = 0, n = get_irp_n_irgs(); i < n; ++i)
 		free_irg_outs(get_irp_irg(i));
 }
 
-
-/*------------------------------------------------------------*
- *  This computes the outedges for in interprocedural graph.  *
- *  There is one quirk:                                       *
- *  The number of the outedges for each node is saved in      *
- *  the first member of the ir_node** array. Maybe we should  *
- *  change this to make it more portable...                   *
- *------------------------------------------------------------*/
-
-
-#ifdef INTERPROCEDURAL_VIEW
-/**
- * Inits the number of outedges for each node
- * before counting.
- */
-static void init_count(ir_node * node, void *env) {
-	(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"
- */
-static void node_arity_count(ir_node * node, void * env) {
-	int *anz = (int *) env, arity, n_outs, i, start;
-	ir_node *succ;
-
-	arity = get_irn_arity(node);
-	start = (is_Block(node)) ? 0 : -1;
-
-	n_outs = 1 + arity + (-start);  // ((is_Block(node)) ? 0 : 1);   // Why + 1??
-	*anz += n_outs;
-
-	for(i = start; i < arity; i++) {
-		succ = get_irn_n(node, i);
-		succ->out = (ir_node **)INT_TO_PTR(PTR_TO_INT(succ->out) + 1);
-	}
-}
-
-/*
- * Inits all nodes for setting the outedges
- * Returns the overall count of edges
- */
-int count_ip_outs(void) {
-	int res = 0;
-
-	cg_walk(init_count, node_arity_count, &res);
-
-	return(res);
-}
-
-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;
-	ir_node ***free = (ir_node ***) env;
-
-	/* Allocate my array */
-	n_outs = PTR_TO_INT(node->out);  /* We wrote the count here in count_ip_outs */
-	dummy_count += n_outs;
-	assert(dummy_count <= global_count && "More outedges than initially counted!");
-	node -> out = *free;
-	*free = &((*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. */
-	node -> out[0] = (ir_node *) 0;
-}
-
-
-/**
- * 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;
-	int start = (!is_Block(node)) ? -1 : 0;
-	(void) env;
-
-	for (i = start; i < arity; ++i) {
-		succ = get_irn_n(node, i);
-		succ->out[get_irn_n_outs(succ)+1] = node;
-		succ->out[0] = INT_TO_PTR(get_irn_n_outs(succ) + 1);
-	}
-}
-
-
-/*
- * Sets the outedges for all nodes.
- */
-void set_ip_outs(void) {
-	ir_node **outedge_array = get_irp_ip_outedges();
-	cg_walk(set_array_pointer, set_out_pointer, (void *) &outedge_array);
-}
-
-
-
-/*
- * 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;
-	ir_node **out_edges;
-
-	assert(get_irp_ip_view_state() == ip_view_valid &&
-	 "Cannot construct outs for invalid ip view.");
-
-	if (irp->outs_state != outs_none) {
-		free_ip_outs();
-	}
-
-	global_count = n_out_edges = count_ip_outs();
-	out_edges    = XMALLOCNZ(ir_node*, n_out_edges);
-	set_irp_ip_outedges(out_edges);
-	set_ip_outs();
-}
-
-void free_ip_outs(void) {
-	ir_node **out_edges = get_irp_ip_outedges();
-	if (out_edges != NULL) {
-		free(out_edges);
-		set_irp_ip_outedges(NULL);
-	}
-	irp->outs_state = outs_none;
-}
-#endif
-
-
-void free_irg_outs(ir_graph *irg) {
+void free_irg_outs(ir_graph *irg)
+{
 	/*   current_ir_graph->outs_state = outs_none; */
 	irg->outs_state = outs_none;
 
@@ -666,46 +513,3 @@ void free_irg_outs(ir_graph *irg) {
 	irg_walk_graph (irg, reset_outs, NULL, NULL);
 #endif /* defined DEBUG_libfirm */
 }
-
-static void check_out_edges(ir_node *irn, void *env) {
-	int i, j, pos;
-	int *pError = env;
-	int error = *pError;
-	int last = is_Block(irn) ? 0 : -1;
-
-	/* check forward: every input must have an out edge */
-	for (i = get_irn_arity(irn) - 1; i >= last; --i) {
-		ir_node *pred = get_irn_n(irn, i);
-
-		for (j = get_irn_n_outs(pred) - 1; j >= 0; --j) {
-			ir_node *user = get_irn_out_ex(pred, j, &pos);
-
-			if (user == irn && pos == i) {
-				break;
-			}
-		}
-		if (j < 0) {
-			ir_fprintf(stderr, "Missing out edge from %+F input %d to %+F", irn, i, pred);
-			++error;
-		}
-	}
-
-	/* checking backward */
-	for (i = get_irn_n_outs(irn) - 1; i >= 0; --i) {
-		ir_node *user = get_irn_out_ex(irn, i, &pos);
-
-		if (get_irn_n(user, pos) != irn) {
-			ir_fprintf(stderr, "Spurious out edge from %+F output %d to %+F", irn, i, user);
-			++error;
-		}
-	}
-	*pError = error;
-}
-
-/* verify outs edges. */
-void verify_outs(ir_graph *irg) {
-	int errors = 0;
-	irg_walk_graph(irg, NULL, check_out_edges, &errors);
-	if (errors > 0)
-		panic("Out edges are corrupt");
-}