* @date 7.2002
* @version $Id$
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
#ifdef HAVE_STRING_H
#include <string.h>
} scc_info;
/** Allocate a new scc_info on the given obstack */
-static INLINE scc_info *new_scc_info(struct obstack *obst) {
+static inline scc_info *new_scc_info(struct obstack *obst) {
scc_info *info = obstack_alloc(obst, sizeof(*info));
memset(info, 0, sizeof(*info));
return info;
/**
* Marks the node n to be on the stack.
*/
-static INLINE void mark_irn_in_stack(ir_node *n) {
+static inline void mark_irn_in_stack(ir_node *n) {
scc_info *info = get_irn_link(n);
info->in_stack = 1;
}
/**
* Marks the node n to be not on the stack.
*/
-static INLINE void mark_irn_not_in_stack(ir_node *n) {
+static inline void mark_irn_not_in_stack(ir_node *n) {
scc_info *info = get_irn_link(n);
info->in_stack = 0;
}
/**
* Returns whether node n is on the stack.
*/
-static INLINE int irn_is_in_stack(ir_node *n) {
+static inline int irn_is_in_stack(ir_node *n) {
scc_info *info = get_irn_link(n);
return info->in_stack;
}
/**
* Sets node n uplink value.
*/
-static INLINE void set_irn_uplink(ir_node *n, int uplink) {
+static inline void set_irn_uplink(ir_node *n, int uplink) {
scc_info *info = get_irn_link(n);
info->uplink = uplink;
}
/**
* Return node n uplink value.
*/
-static INLINE int get_irn_uplink(ir_node *n) {
+static inline int get_irn_uplink(ir_node *n) {
scc_info *info = get_irn_link(n);
return info->uplink;
}
/**
* Sets node n dfn value.
*/
-static INLINE void set_irn_dfn(ir_node *n, int dfn) {
+static inline void set_irn_dfn(ir_node *n, int dfn) {
scc_info *info = get_irn_link(n);
info->dfn = dfn;
}
/**
* Returns node n dfn value.
*/
-static INLINE int get_irn_dfn(ir_node *n) {
+static inline int get_irn_dfn(ir_node *n) {
scc_info *info = get_irn_link(n);
return info->dfn;
}
/**
* Initializes the IR-node stack
*/
-static INLINE void init_stack(void) {
+static inline void init_stack(void) {
if (stack) {
ARR_RESIZE(ir_node *, stack, 1000);
} else {
tos = 0;
}
+static void finish_stack(void)
+{
+ DEL_ARR_F(stack);
+ stack = NULL;
+}
+
/**
* Push a node n onto the IR-node stack.
*/
-static INLINE void push(ir_node *n) {
+static inline void push(ir_node *n) {
if (tos == ARR_LEN(stack)) {
int nlen = ARR_LEN(stack) * 2;
ARR_RESIZE(ir_node *, stack, nlen);
/**
* Pop a node from the IR-node stack and return it.
*/
-static INLINE ir_node *pop(void) {
+static inline ir_node *pop(void) {
ir_node *n = stack[--tos];
mark_irn_not_in_stack(n);
return n;
* The nodes from tos up to n belong to the current loop.
* Removes them from the stack and adds them to the current loop.
*/
-static INLINE void pop_scc_to_loop(ir_node *n) {
+static inline void pop_scc_to_loop(ir_node *n) {
ir_node *m;
do {
* Removes and unmarks all nodes up to n from the stack.
* The nodes must be visited once more to assign them to a scc.
*/
-static INLINE void pop_scc_unmark_visit(ir_node *n) {
+static inline void pop_scc_unmark_visit(ir_node *n) {
ir_node *m;
do {
* Clear the backedges for all nodes.
* Called from a walker.
*/
-static INLINE void init_node(ir_node *n, void *env) {
+static inline void init_node(ir_node *n, void *env) {
struct obstack *obst = env;
if (is_Block(n))
set_irn_link(n, new_scc_info(obst));
/**
* Initializes the common global settings for the scc algorithm
*/
-static INLINE void init_scc_common(void) {
+static inline void init_scc_common(void) {
current_dfn = 1;
loop_node_cnt = 0;
init_stack();
* Initializes the scc algorithm for the intraprocedural case.
* Add scc info to every block node.
*/
-static INLINE void init_scc(ir_graph *irg, struct obstack *obst) {
+static inline void init_scc(ir_graph *irg, struct obstack *obst) {
init_scc_common();
irg_walk_graph(irg, init_node, NULL, obst);
}
+static inline void finish_scc(void)
+{
+ finish_stack();
+}
+
#ifdef INTERPROCEDURAL_VIEW
/**
* Initializes the scc algorithm for the interprocedural case.
*/
-static INLINE void init_ip_scc(struct obstack *obst) {
+static inline void init_ip_scc(struct obstack *obst) {
init_scc_common();
cg_walk(init_node, NULL, obst);
static int is_head(ir_node *n, ir_node *root) {
int i, arity;
int some_outof_loop = 0, some_in_loop = 0;
+ (void) root;
assert(is_Block(n));
if (!is_outermost_StartBlock(n)) {
arity = get_Block_n_cfgpreds(n);
for (i = 0; i < arity; i++) {
- ir_node *pred = get_nodes_block(skip_Proj(get_irn_n(n, i)));
- if (is_backedge(n, i)) continue;
+ ir_node *pred = get_Block_cfgpred_block(n, i);
+ /* ignore Bad control flow: it cannot happen */
+ if (is_Bad(pred))
+ continue;
+ if (is_backedge(n, i))
+ continue;
if (!irn_is_in_stack(pred)) {
some_outof_loop = 1;
} else {
*/
static int is_endless_head(ir_node *n, ir_node *root) {
int i, arity;
- int some_outof_loop = 0, some_in_loop = 0;
+ int none_outof_loop = 1, some_in_loop = 0;
+ (void) root;
assert(is_Block(n));
/* Test for legal loop header: Block, Phi, ... */
if (!is_outermost_StartBlock(n)) {
arity = get_Block_n_cfgpreds(n);
for (i = 0; i < arity; i++) {
- ir_node *pred = get_nodes_block(skip_Proj(get_irn_n(n, i)));
+ ir_node *pred = get_Block_cfgpred_block(n, i);
+ /* ignore Bad control flow: it cannot happen */
+ if (is_Bad(pred))
+ continue;
if (is_backedge(n, i))
continue;
if (!irn_is_in_stack(pred)) {
- some_outof_loop = 1;
+ none_outof_loop = 0;
} else {
assert(get_irn_uplink(pred) >= get_irn_uplink(root));
some_in_loop = 1;
}
}
}
- return !some_outof_loop && some_in_loop;
+ return none_outof_loop && some_in_loop;
}
/**
if (!is_outermost_StartBlock(n)) {
int arity = get_Block_n_cfgpreds(n);
for (i = 0; i < arity; i++) {
- ir_node *pred = get_nodes_block(skip_Proj(get_irn_n(n, i)));
+ ir_node *pred = get_Block_cfgpred_block(n, i);
+ /* ignore Bad control flow: it cannot happen */
+ if (is_Bad(pred))
+ continue;
if (is_backedge(n, i) || !irn_is_in_stack(pred))
continue;
if (get_irn_dfn(pred) >= limit && (min == -1 || get_irn_dfn(pred) < min)) {
if (!is_outermost_StartBlock(n)) {
int arity = get_Block_n_cfgpreds(n);
for (i = 0; i < arity; i++) {
- ir_node *pred = get_nodes_block(skip_Proj(get_irn_n(n, i)));
+ ir_node *pred = get_Block_cfgpred_block(n, i);
+ /* ignore Bad control flow: it cannot happen */
+ if (is_Bad(pred))
+ continue;
if (is_backedge(n, i) || !irn_is_in_stack(pred))
continue;
if (get_irn_dfn(pred) > max) {
/* A dead loop not reachable from Start. */
for (i = tos-2; i >= 0; --i) {
m = stack[i];
- if (is_endless_head (m, n)) {
+ if (is_endless_head(m, n)) {
res_index = smallest_dfn_pred (m, get_irn_dfn(m) + 1);
if (res_index == -2) /* no smallest dfn pred found. */
- res_index = largest_dfn_pred (m);
+ res_index = largest_dfn_pred(m);
break;
}
if (m == n) break; /* It's not an unreachable loop, either. */
assert(res_index > -2);
set_backedge(m, res_index);
- return is_outermost_StartBlock(n) ? NULL : get_nodes_block(skip_Proj(get_irn_n(m, res_index)));
+ return is_outermost_StartBlock(n) ? NULL : get_Block_cfgpred_block(m, res_index);
}
/**
* returns non.zero if l is the outermost loop.
*/
-INLINE static int is_outermost_loop(ir_loop *l) {
+inline static int is_outermost_loop(ir_loop *l) {
return l == get_loop_outer_loop(l);
}
assert(is_Block(n));
- if (irn_visited(n)) return;
- mark_irn_visited(n);
+ if (irn_visited_else_mark(n)) return;
/* Initialize the node */
set_irn_dfn(n, current_dfn); /* Depth first number for this node */
if (is_backedge(n, i))
continue;
- m = get_nodes_block(skip_Proj(get_irn_n(n, i)));
+ m = get_Block_cfgpred_block(n, i);
+ /* ignore Bad control flow: it cannot happen */
+ if (is_Bad(m))
+ continue;
cfscc(m);
if (irn_is_in_stack(m)) {
#endif
/* Remove the cfloop from the stack ... */
- pop_scc_unmark_visit (n);
+ pop_scc_unmark_visit(n);
/* The current backedge has been marked, that is temporarily eliminated,
by find tail. Start the scc algorithm
if (is_Block(el))
cfscc(el);
}
+ finish_scc();
obstack_free(&temp, NULL);
assert(head_rem == current_loop);
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