/* Callgraph handling code.
- Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
Contributed by Jan Hubicka
This file is part of GCC.
The callgraph at the moment does not represent indirect calls or calls
from other compilation unit. Flag NEEDED is set for each node that may
- be accessed in such a invisible way and it shall be considered an
+ be accessed in such an invisible way and it shall be considered an
entry point to the callgraph.
Intraprocedural information:
#include "output.h"
#include "intl.h"
+static void cgraph_node_remove_callers (struct cgraph_node *node);
+static inline void cgraph_edge_remove_caller (struct cgraph_edge *e);
+static inline void cgraph_edge_remove_callee (struct cgraph_edge *e);
+
/* Hash table used to convert declarations into nodes. */
static GTY((param_is (struct cgraph_node))) htab_t cgraph_hash;
/* Queue of cgraph nodes scheduled to be lowered and output. */
struct cgraph_varpool_node *cgraph_varpool_nodes_queue;
-/* Number of nodes in existence. */
-int cgraph_varpool_n_nodes;
-
/* The linked list of cgraph varpool nodes. */
static GTY(()) struct cgraph_varpool_node *cgraph_varpool_nodes;
return node;
}
+/* Compare ASMNAME with the DECL_ASSEMBLER_NAME of DECL. */
+
+static bool
+decl_assembler_name_equal (tree decl, tree asmname)
+{
+ tree decl_asmname = DECL_ASSEMBLER_NAME (decl);
+
+ if (decl_asmname == asmname)
+ return true;
+
+ /* If the target assembler name was set by the user, things are trickier.
+ We have a leading '*' to begin with. After that, it's arguable what
+ is the correct thing to do with -fleading-underscore. Arguably, we've
+ historically been doing the wrong thing in assemble_alias by always
+ printing the leading underscore. Since we're not changing that, make
+ sure user_label_prefix follows the '*' before matching. */
+ if (IDENTIFIER_POINTER (decl_asmname)[0] == '*')
+ {
+ const char *decl_str = IDENTIFIER_POINTER (decl_asmname) + 1;
+ size_t ulp_len = strlen (user_label_prefix);
+
+ if (ulp_len == 0)
+ ;
+ else if (strncmp (decl_str, user_label_prefix, ulp_len) == 0)
+ decl_str += ulp_len;
+ else
+ return false;
+
+ return strcmp (decl_str, IDENTIFIER_POINTER (asmname)) == 0;
+ }
+
+ return false;
+}
+
+
+/* Return the cgraph node that has ASMNAME for its DECL_ASSEMBLER_NAME.
+ Return NULL if there's no such node. */
+
+struct cgraph_node *
+cgraph_node_for_asm (tree asmname)
+{
+ struct cgraph_node *node;
+
+ for (node = cgraph_nodes; node ; node = node->next)
+ if (decl_assembler_name_equal (node->decl, asmname))
+ return node;
+
+ return NULL;
+}
+
/* Return callgraph edge representing CALL_EXPR. */
struct cgraph_edge *
cgraph_edge (struct cgraph_node *node, tree call_expr)
edge->caller = caller;
edge->callee = callee;
edge->call_expr = call_expr;
+ edge->prev_caller = NULL;
edge->next_caller = callee->callers;
+ if (callee->callers)
+ callee->callers->prev_caller = edge;
+ edge->prev_callee = NULL;
edge->next_callee = caller->callees;
+ if (caller->callees)
+ caller->callees->prev_callee = edge;
caller->callees = edge;
callee->callers = edge;
return edge;
}
-/* Remove the edge E the cgraph. */
+/* Remove the edge E from the list of the callers of the callee. */
+
+static inline void
+cgraph_edge_remove_callee (struct cgraph_edge *e)
+{
+ if (e->prev_caller)
+ e->prev_caller->next_caller = e->next_caller;
+ if (e->next_caller)
+ e->next_caller->prev_caller = e->prev_caller;
+ if (!e->prev_caller)
+ e->callee->callers = e->next_caller;
+}
+
+/* Remove the edge E from the list of the callees of the caller. */
+
+static inline void
+cgraph_edge_remove_caller (struct cgraph_edge *e)
+{
+ if (e->prev_callee)
+ e->prev_callee->next_callee = e->next_callee;
+ if (e->next_callee)
+ e->next_callee->prev_callee = e->prev_callee;
+ if (!e->prev_callee)
+ e->caller->callees = e->next_callee;
+}
+
+/* Remove the edge E in the cgraph. */
void
cgraph_remove_edge (struct cgraph_edge *e)
{
- struct cgraph_edge **edge, **edge2;
+ /* Remove from callers list of the callee. */
+ cgraph_edge_remove_callee (e);
- for (edge = &e->callee->callers; *edge && *edge != e;
- edge = &((*edge)->next_caller))
- continue;
- gcc_assert (*edge);
- *edge = (*edge)->next_caller;
- for (edge2 = &e->caller->callees; *edge2 && *edge2 != e;
- edge2 = &(*edge2)->next_callee)
- continue;
- gcc_assert (*edge2);
- *edge2 = (*edge2)->next_callee;
+ /* Remove from callees list of the callers. */
+ cgraph_edge_remove_caller (e);
}
/* Redirect callee of E to N. The function does not update underlying
void
cgraph_redirect_edge_callee (struct cgraph_edge *e, struct cgraph_node *n)
{
- struct cgraph_edge **edge;
+ /* Remove from callers list of the current callee. */
+ cgraph_edge_remove_callee (e);
- for (edge = &e->callee->callers; *edge && *edge != e;
- edge = &((*edge)->next_caller))
- continue;
- gcc_assert (*edge);
- *edge = (*edge)->next_caller;
- e->callee = n;
+ /* Insert to callers list of the new callee. */
+ e->prev_caller = NULL;
+ if (n->callers)
+ n->callers->prev_caller = e;
e->next_caller = n->callers;
n->callers = e;
+ e->callee = n;
+}
+
+/* Remove all callees from the node. */
+
+void
+cgraph_node_remove_callees (struct cgraph_node *node)
+{
+ struct cgraph_edge *e;
+
+ /* It is sufficient to remove the edges from the lists of callers of
+ the callees. The callee list of the node can be zapped with one
+ assignment. */
+ for (e = node->callees; e; e = e->next_callee)
+ cgraph_edge_remove_callee (e);
+ node->callees = NULL;
+}
+
+/* Remove all callers from the node. */
+
+static void
+cgraph_node_remove_callers (struct cgraph_node *node)
+{
+ struct cgraph_edge *e;
+
+ /* It is sufficient to remove the edges from the lists of callees of
+ the callers. The caller list of the node can be zapped with one
+ assignment. */
+ for (e = node->callers; e; e = e->next_caller)
+ cgraph_edge_remove_caller (e);
+ node->callers = NULL;
}
/* Remove the node from cgraph. */
void **slot;
bool check_dead = 1;
- while (node->callers)
- cgraph_remove_edge (node->callers);
- while (node->callees)
- cgraph_remove_edge (node->callees);
+ cgraph_node_remove_callers (node);
+ cgraph_node_remove_callees (node);
while (node->nested)
cgraph_remove_node (node->nested);
if (node->origin)
cgraph_mark_reachable_node (node);
}
-/* Return true when CALLER_DECL calls CALLEE_DECL. */
-
-bool
-cgraph_calls_p (tree caller_decl, tree callee_decl)
-{
- struct cgraph_node *caller = cgraph_node (caller_decl);
- struct cgraph_node *callee = cgraph_node (callee_decl);
- struct cgraph_edge *edge;
-
- for (edge = callee->callers; edge && (edge)->caller != caller;
- edge = (edge->next_caller))
- continue;
- return edge != NULL;
-}
-
/* Return local info for the compiled function. */
struct cgraph_local_info *
return *slot;
node = ggc_alloc_cleared (sizeof (*node));
node->decl = decl;
- cgraph_varpool_n_nodes++;
+ node->next = cgraph_varpool_nodes;
cgraph_varpool_nodes = node;
*slot = node;
return node;
}
+struct cgraph_varpool_node *
+cgraph_varpool_node_for_asm (tree asmname)
+{
+ struct cgraph_varpool_node *node;
+
+ for (node = cgraph_varpool_nodes; node ; node = node->next)
+ if (decl_assembler_name_equal (node->decl, asmname))
+ return node;
+
+ return NULL;
+}
+
/* Set the DECL_ASSEMBLER_NAME and update cgraph hashtables. */
void
change_decl_assembler_name (tree decl, tree name)
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