/* Callgraph handling code.
- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008
+ Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Free Software Foundation, Inc.
Contributed by Jan Hubicka
based on DECL_UID. The call-graph nodes are created lazily using
cgraph_node function when called for unknown declaration.
- 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 an invisible way and it shall be considered an
- entry point to the callgraph.
+ The callgraph at the moment does not represent all indirect calls or calls
+ from other compilation units. Flag NEEDED is set for each node that may be
+ accessed in such an invisible way and it shall be considered an entry point
+ to the callgraph.
+
+ On the other hand, the callgraph currently does contain some edges for
+ indirect calls with unknown callees which can be accessed through
+ indirect_calls field of a node. It should be noted however that at the
+ moment only calls which are potential candidates for indirect inlining are
+ added there.
Interprocedural information:
rtl_info used by RTL backend to propagate data from already compiled
functions to their callers.
+ Moreover, each node has a uid which can be used to keep information in
+ on-the-side arrays. UIDs are reused and therefore reasonably dense.
+
Inlining plans:
The function inlining information is decided in advance and maintained
#include "tree-dump.h"
#include "tree-flow.h"
#include "value-prof.h"
+#include "except.h"
+#include "diagnostic.h"
+#include "rtl.h"
+#include "ipa-utils.h"
static void cgraph_node_remove_callers (struct cgraph_node *node);
static inline void cgraph_edge_remove_caller (struct cgraph_edge *e);
}
}
-/* Register HOOK to be called with DATA on each removed node. */
+/* Register HOOK to be called with DATA on each inserted node. */
struct cgraph_node_hook_list *
cgraph_add_function_insertion_hook (cgraph_node_hook hook, void *data)
{
return entry;
}
-/* Remove ENTRY from the list of hooks called on removing nodes. */
+/* Remove ENTRY from the list of hooks called on inserted nodes. */
void
cgraph_remove_function_insertion_hook (struct cgraph_node_hook_list *entry)
{
free (entry);
}
-/* Call all node removal hooks. */
+/* Call all node insertion hooks. */
void
cgraph_call_function_insertion_hooks (struct cgraph_node *node)
{
return (hashval_t) DECL_UID (n->decl);
}
+
/* Returns nonzero if P1 and P2 are equal. */
static int
return DECL_UID (n1->decl) == DECL_UID (n2->decl);
}
-/* Allocate new callgraph node and insert it into basic data structures. */
+/* Allocate new callgraph node. */
-static struct cgraph_node *
-cgraph_create_node (void)
+static inline struct cgraph_node *
+cgraph_allocate_node (void)
{
struct cgraph_node *node;
node->uid = cgraph_max_uid++;
}
+ return node;
+}
+
+/* Allocate new callgraph node and insert it into basic data structures. */
+
+static struct cgraph_node *
+cgraph_create_node (void)
+{
+ struct cgraph_node *node = cgraph_allocate_node ();
+
node->next = cgraph_nodes;
node->pid = -1;
node->order = cgraph_order++;
cgraph_nodes->previous = node;
node->previous = NULL;
node->global.estimated_growth = INT_MIN;
+ node->frequency = NODE_FREQUENCY_NORMAL;
+ ipa_empty_ref_list (&node->ref_list);
cgraph_nodes = node;
cgraph_n_nodes++;
return node;
if (*slot)
{
node = *slot;
+ if (node->same_body_alias)
+ node = node->same_body;
return node;
}
return node;
}
+/* Mark ALIAS as an alias to DECL. */
+
+static struct cgraph_node *
+cgraph_same_body_alias_1 (tree alias, tree decl)
+{
+ struct cgraph_node key, *alias_node, *decl_node, **slot;
+
+ gcc_assert (TREE_CODE (decl) == FUNCTION_DECL);
+ gcc_assert (TREE_CODE (alias) == FUNCTION_DECL);
+ decl_node = cgraph_node (decl);
+
+ key.decl = alias;
+
+ slot = (struct cgraph_node **) htab_find_slot (cgraph_hash, &key, INSERT);
+
+ /* If the cgraph_node has been already created, fail. */
+ if (*slot)
+ return NULL;
+
+ alias_node = cgraph_allocate_node ();
+ alias_node->decl = alias;
+ alias_node->same_body_alias = 1;
+ alias_node->same_body = decl_node;
+ alias_node->previous = NULL;
+ if (decl_node->same_body)
+ decl_node->same_body->previous = alias_node;
+ alias_node->next = decl_node->same_body;
+ alias_node->thunk.alias = decl;
+ decl_node->same_body = alias_node;
+ *slot = alias_node;
+ return alias_node;
+}
+
+/* Attempt to mark ALIAS as an alias to DECL. Return TRUE if successful.
+ Same body aliases are output whenever the body of DECL is output,
+ and cgraph_node (ALIAS) transparently returns cgraph_node (DECL). */
+
+bool
+cgraph_same_body_alias (tree alias, tree decl)
+{
+#ifndef ASM_OUTPUT_DEF
+ /* If aliases aren't supported by the assembler, fail. */
+ return false;
+#endif
+
+ /*gcc_assert (!assembler_name_hash);*/
+
+ return cgraph_same_body_alias_1 (alias, decl) != NULL;
+}
+
+void
+cgraph_add_thunk (tree alias, tree decl, bool this_adjusting,
+ HOST_WIDE_INT fixed_offset, HOST_WIDE_INT virtual_value,
+ tree virtual_offset,
+ tree real_alias)
+{
+ struct cgraph_node *node = cgraph_get_node (alias);
+
+ if (node)
+ {
+ gcc_assert (node->local.finalized);
+ gcc_assert (!node->same_body);
+ cgraph_remove_node (node);
+ }
+
+ node = cgraph_same_body_alias_1 (alias, decl);
+ gcc_assert (node);
+#ifdef ENABLE_CHECKING
+ gcc_assert (!virtual_offset
+ || tree_int_cst_equal (virtual_offset, size_int (virtual_value)));
+#endif
+ node->thunk.fixed_offset = fixed_offset;
+ node->thunk.this_adjusting = this_adjusting;
+ node->thunk.virtual_value = virtual_value;
+ node->thunk.virtual_offset_p = virtual_offset != NULL;
+ node->thunk.alias = real_alias;
+ node->thunk.thunk_p = true;
+}
+
+/* Returns the cgraph node assigned to DECL or NULL if no cgraph node
+ is assigned. */
+
+struct cgraph_node *
+cgraph_get_node (tree decl)
+{
+ struct cgraph_node key, *node = NULL, **slot;
+
+ gcc_assert (TREE_CODE (decl) == FUNCTION_DECL);
+
+ if (!cgraph_hash)
+ return NULL;
+
+ key.decl = decl;
+
+ slot = (struct cgraph_node **) htab_find_slot (cgraph_hash, &key,
+ NO_INSERT);
+
+ if (slot && *slot)
+ {
+ node = *slot;
+ if (node->same_body_alias)
+ node = node->same_body;
+ }
+ return node;
+}
+
/* Insert already constructed node into hashtable. */
void
it is __builtin_strlen and strlen, for instance. Do we need to
record them all? Original implementation marked just first one
so lets hope for the best. */
- if (*slot)
- continue;
- *slot = node;
+ if (!*slot)
+ *slot = node;
+ if (node->same_body)
+ {
+ struct cgraph_node *alias;
+
+ for (alias = node->same_body; alias; alias = alias->next)
+ {
+ hashval_t hash;
+ name = DECL_ASSEMBLER_NAME (alias->decl);
+ hash = decl_assembler_name_hash (name);
+ slot = htab_find_slot_with_hash (assembler_name_hash, name,
+ hash, INSERT);
+ if (!*slot)
+ *slot = alias;
+ }
+ }
}
}
NO_INSERT);
if (slot)
- return (struct cgraph_node *) *slot;
+ {
+ node = (struct cgraph_node *) *slot;
+ if (node->same_body_alias)
+ node = node->same_body;
+ return node;
+ }
return NULL;
}
return ((const struct cgraph_edge *) x)->call_stmt == y;
}
+/* Add call graph edge E to call site hash of its caller. */
+
+static inline void
+cgraph_add_edge_to_call_site_hash (struct cgraph_edge *e)
+{
+ void **slot;
+ slot = htab_find_slot_with_hash (e->caller->call_site_hash,
+ e->call_stmt,
+ htab_hash_pointer (e->call_stmt),
+ INSERT);
+ gcc_assert (!*slot);
+ *slot = e;
+}
/* Return the callgraph edge representing the GIMPLE_CALL statement
CALL_STMT. */
solution. It is not good idea to add pointer into CALL_EXPR itself
because we want to make possible having multiple cgraph nodes representing
different clones of the same body before the body is actually cloned. */
- for (e = node->callees; e; e= e->next_callee)
+ for (e = node->callees; e; e = e->next_callee)
{
if (e->call_stmt == call_stmt)
break;
n++;
}
+ if (!e)
+ for (e = node->indirect_calls; e; e = e->next_callee)
+ {
+ if (e->call_stmt == call_stmt)
+ break;
+ n++;
+ }
+
if (n > 100)
{
node->call_site_hash = htab_create_ggc (120, edge_hash, edge_eq, NULL);
for (e2 = node->callees; e2; e2 = e2->next_callee)
- {
- void **slot;
- slot = htab_find_slot_with_hash (node->call_site_hash,
- e2->call_stmt,
- htab_hash_pointer (e2->call_stmt),
- INSERT);
- gcc_assert (!*slot);
- *slot = e2;
- }
+ cgraph_add_edge_to_call_site_hash (e2);
+ for (e2 = node->indirect_calls; e2; e2 = e2->next_callee)
+ cgraph_add_edge_to_call_site_hash (e2);
}
return e;
void
cgraph_set_call_stmt (struct cgraph_edge *e, gimple new_stmt)
{
+ tree decl;
+
if (e->caller->call_site_hash)
{
htab_remove_elt_with_hash (e->caller->call_site_hash,
e->call_stmt,
htab_hash_pointer (e->call_stmt));
}
+
e->call_stmt = new_stmt;
+ if (e->indirect_unknown_callee
+ && (decl = gimple_call_fndecl (new_stmt)))
+ {
+ /* Constant propagation (and possibly also inlining?) can turn an
+ indirect call into a direct one. */
+ struct cgraph_node *new_callee = cgraph_node (decl);
+
+ cgraph_make_edge_direct (e, new_callee);
+ }
+
push_cfun (DECL_STRUCT_FUNCTION (e->caller->decl));
e->can_throw_external = stmt_can_throw_external (new_stmt);
pop_cfun ();
if (e->caller->call_site_hash)
- {
- void **slot;
- slot = htab_find_slot_with_hash (e->caller->call_site_hash,
- e->call_stmt,
- htab_hash_pointer
- (e->call_stmt), INSERT);
- gcc_assert (!*slot);
- *slot = e;
- }
+ cgraph_add_edge_to_call_site_hash (e);
}
-/* Like cgraph_set_call_stmt but walk the clone tree and update all clones sharing
- same function body. */
+/* Like cgraph_set_call_stmt but walk the clone tree and update all
+ clones sharing the same function body. */
void
cgraph_set_call_stmt_including_clones (struct cgraph_node *orig,
if (edge)
cgraph_set_call_stmt (edge, new_stmt);
- if (orig->clones)
- for (node = orig->clones; node != orig;)
+
+ node = orig->clones;
+ if (node)
+ while (node != orig)
{
struct cgraph_edge *edge = cgraph_edge (node, old_stmt);
if (edge)
}
/* Like cgraph_create_edge walk the clone tree and update all clones sharing
- same function body.
-
+ same function body. If clones already have edge for OLD_STMT; only
+ update the edge same way as cgraph_set_call_stmt_including_clones does.
+
TODO: COUNT and LOOP_DEPTH should be properly distributed based on relative
- frequencies of the clones.
- */
+ frequencies of the clones. */
void
-cgraph_create_edge_including_clones (struct cgraph_node *orig, struct cgraph_node *callee,
- gimple stmt, gcov_type count, int freq,
- int loop_depth,
+cgraph_create_edge_including_clones (struct cgraph_node *orig,
+ struct cgraph_node *callee,
+ gimple old_stmt,
+ gimple stmt, gcov_type count,
+ int freq, int loop_depth,
cgraph_inline_failed_t reason)
{
struct cgraph_node *node;
+ struct cgraph_edge *edge;
- cgraph_create_edge (orig, callee, stmt, count, freq, loop_depth)->inline_failed =
- reason;
+ if (!cgraph_edge (orig, stmt))
+ {
+ edge = cgraph_create_edge (orig, callee, stmt, count, freq, loop_depth);
+ edge->inline_failed = reason;
+ }
- if (orig->clones)
- for (node = orig->clones; node != orig;)
+ node = orig->clones;
+ if (node)
+ while (node != orig)
{
- /* It is possible that we already constant propagated into the clone
- and turned indirect call into dirrect call. */
- if (!cgraph_edge (node, stmt))
- cgraph_create_edge (node, callee, stmt, count, freq,
- loop_depth)->inline_failed = reason;
+ struct cgraph_edge *edge = cgraph_edge (node, old_stmt);
+
+ /* It is possible that clones already contain the edge while
+ master didn't. Either we promoted indirect call into direct
+ call in the clone or we are processing clones of unreachable
+ master where edges has been rmeoved. */
+ if (edge)
+ cgraph_set_call_stmt (edge, stmt);
+ else if (!cgraph_edge (node, stmt))
+ {
+ edge = cgraph_create_edge (node, callee, stmt, count,
+ freq, loop_depth);
+ edge->inline_failed = reason;
+ }
if (node->clones)
node = node->clones;
{
struct cgraph_node *callee = e->callee;
- if (!callee->analyzed)
+ if (e->indirect_unknown_callee)
+ e->inline_failed = CIF_INDIRECT_UNKNOWN_CALL;
+ else if (!callee->analyzed)
e->inline_failed = CIF_BODY_NOT_AVAILABLE;
else if (callee->local.redefined_extern_inline)
e->inline_failed = CIF_REDEFINED_EXTERN_INLINE;
else if (!callee->local.inlinable)
e->inline_failed = CIF_FUNCTION_NOT_INLINABLE;
- else if (gimple_call_cannot_inline_p (e->call_stmt))
+ else if (e->call_stmt && gimple_call_cannot_inline_p (e->call_stmt))
e->inline_failed = CIF_MISMATCHED_ARGUMENTS;
else
e->inline_failed = CIF_FUNCTION_NOT_CONSIDERED;
}
-/* Create edge from CALLER to CALLEE in the cgraph. */
+/* Allocate a cgraph_edge structure and fill it with data according to the
+ parameters of which only CALLEE can be NULL (when creating an indirect call
+ edge). */
-struct cgraph_edge *
-cgraph_create_edge (struct cgraph_node *caller, struct cgraph_node *callee,
- gimple call_stmt, gcov_type count, int freq, int nest)
+static struct cgraph_edge *
+cgraph_create_edge_1 (struct cgraph_node *caller, struct cgraph_node *callee,
+ gimple call_stmt, gcov_type count, int freq, int nest)
{
struct cgraph_edge *edge;
+ /* LTO does not actually have access to the call_stmt since these
+ have not been loaded yet. */
+ if (call_stmt)
+ {
#ifdef ENABLE_CHECKING
- /* This is rather pricely check possibly trigerring construction of call stmt
- hashtable. */
- gcc_assert (!cgraph_edge (caller, call_stmt));
+ /* This is rather pricely check possibly trigerring construction of
+ call stmt hashtable. */
+ gcc_assert (!cgraph_edge (caller, call_stmt));
#endif
- gcc_assert (is_gimple_call (call_stmt));
+ gcc_assert (is_gimple_call (call_stmt));
+ }
if (free_edges)
{
}
edge->aux = NULL;
-
edge->caller = caller;
edge->callee = callee;
+ edge->prev_caller = NULL;
+ edge->next_caller = NULL;
+ edge->prev_callee = NULL;
+ edge->next_callee = NULL;
+
+ edge->count = count;
+ gcc_assert (count >= 0);
+ edge->frequency = freq;
+ gcc_assert (freq >= 0);
+ gcc_assert (freq <= CGRAPH_FREQ_MAX);
+ edge->loop_nest = nest;
+
edge->call_stmt = call_stmt;
push_cfun (DECL_STRUCT_FUNCTION (caller->decl));
- edge->can_throw_external = stmt_can_throw_external (call_stmt);
+ edge->can_throw_external
+ = call_stmt ? stmt_can_throw_external (call_stmt) : false;
pop_cfun ();
- edge->prev_caller = NULL;
+ edge->call_stmt_cannot_inline_p =
+ (call_stmt ? gimple_call_cannot_inline_p (call_stmt) : false);
+ if (call_stmt && caller->call_site_hash)
+ cgraph_add_edge_to_call_site_hash (edge);
+
+ edge->indirect_info = NULL;
+ edge->indirect_inlining_edge = 0;
+
+ return edge;
+}
+
+/* Create edge from CALLER to CALLEE in the cgraph. */
+
+struct cgraph_edge *
+cgraph_create_edge (struct cgraph_node *caller, struct cgraph_node *callee,
+ gimple call_stmt, gcov_type count, int freq, int nest)
+{
+ struct cgraph_edge *edge = cgraph_create_edge_1 (caller, callee, call_stmt,
+ count, freq, nest);
+
+ edge->indirect_unknown_callee = 0;
+ initialize_inline_failed (edge);
+
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;
- edge->count = count;
- gcc_assert (count >= 0);
- edge->frequency = freq;
- gcc_assert (freq >= 0);
- gcc_assert (freq <= CGRAPH_FREQ_MAX);
- edge->loop_nest = nest;
- edge->indirect_call = 0;
- if (caller->call_site_hash)
- {
- void **slot;
- slot = htab_find_slot_with_hash (caller->call_site_hash,
- edge->call_stmt,
- htab_hash_pointer
- (edge->call_stmt),
- INSERT);
- gcc_assert (!*slot);
- *slot = edge;
- }
+ return edge;
+}
+
+
+/* Create an indirect edge with a yet-undetermined callee where the call
+ statement destination is a formal parameter of the caller with index
+ PARAM_INDEX. */
+
+struct cgraph_edge *
+cgraph_create_indirect_edge (struct cgraph_node *caller, gimple call_stmt,
+ int ecf_flags,
+ gcov_type count, int freq, int nest)
+{
+ struct cgraph_edge *edge = cgraph_create_edge_1 (caller, NULL, call_stmt,
+ count, freq, nest);
+
+ edge->indirect_unknown_callee = 1;
initialize_inline_failed (edge);
+ edge->indirect_info = GGC_CNEW (struct cgraph_indirect_call_info);
+ edge->indirect_info->param_index = -1;
+ edge->indirect_info->ecf_flags = ecf_flags;
+
+ edge->next_callee = caller->indirect_calls;
+ if (caller->indirect_calls)
+ caller->indirect_calls->prev_callee = edge;
+ caller->indirect_calls = edge;
+
return edge;
}
static inline void
cgraph_edge_remove_callee (struct cgraph_edge *e)
{
+ gcc_assert (!e->indirect_unknown_callee);
if (e->prev_caller)
e->prev_caller->next_caller = e->next_caller;
if (e->next_caller)
if (e->next_callee)
e->next_callee->prev_callee = e->prev_callee;
if (!e->prev_callee)
- e->caller->callees = e->next_callee;
+ {
+ if (e->indirect_unknown_callee)
+ e->caller->indirect_calls = e->next_callee;
+ else
+ e->caller->callees = e->next_callee;
+ }
if (e->caller->call_site_hash)
htab_remove_elt_with_hash (e->caller->call_site_hash,
e->call_stmt,
/* Call all edge removal hooks. */
cgraph_call_edge_removal_hooks (e);
- /* Remove from callers list of the callee. */
- cgraph_edge_remove_callee (e);
+ if (!e->indirect_unknown_callee)
+ /* Remove from callers list of the callee. */
+ cgraph_edge_remove_callee (e);
/* Remove from callees list of the callers. */
cgraph_edge_remove_caller (e);
cgraph_free_edge (e);
}
+/* Set callee of call graph edge E and add it to the corresponding set of
+ callers. */
+
+static void
+cgraph_set_edge_callee (struct cgraph_edge *e, struct cgraph_node *n)
+{
+ e->prev_caller = NULL;
+ if (n->callers)
+ n->callers->prev_caller = e;
+ e->next_caller = n->callers;
+ n->callers = e;
+ e->callee = n;
+}
+
/* Redirect callee of E to N. The function does not update underlying
call expression. */
cgraph_edge_remove_callee (e);
/* 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;
+ cgraph_set_edge_callee (e, n);
+}
+
+/* Make an indirect EDGE with an unknown callee an ordinary edge leading to
+ CALLEE. */
+
+void
+cgraph_make_edge_direct (struct cgraph_edge *edge, struct cgraph_node *callee)
+{
+ edge->indirect_unknown_callee = 0;
+
+ /* Get the edge out of the indirect edge list. */
+ if (edge->prev_callee)
+ edge->prev_callee->next_callee = edge->next_callee;
+ if (edge->next_callee)
+ edge->next_callee->prev_callee = edge->prev_callee;
+ if (!edge->prev_callee)
+ edge->caller->indirect_calls = edge->next_callee;
+
+ /* Put it into the normal callee list */
+ edge->prev_callee = NULL;
+ edge->next_callee = edge->caller->callees;
+ if (edge->caller->callees)
+ edge->caller->callees->prev_callee = edge;
+ edge->caller->callees = edge;
+
+ /* Insert to callers list of the new callee. */
+ cgraph_set_edge_callee (edge, callee);
+
+ /* We need to re-determine the inlining status of the edge. */
+ initialize_inline_failed (edge);
}
if (e)
{
- /* See if the call is already there. It might be because of indirect
- inlining already found it. */
- if (new_call && e->callee->decl == new_call)
+ /* See if the edge is already there and has the correct callee. It
+ might be so because of indirect inlining has already updated
+ it. */
+ if (new_call && e->callee && e->callee->decl == new_call)
return;
/* Otherwise remove edge and create new one; we can't simply redirect
since function has changed, so inline plan and other information
attached to edge is invalid. */
- cgraph_remove_edge (e);
count = e->count;
frequency = e->frequency;
loop_nest = e->loop_nest;
+ cgraph_remove_edge (e);
}
else
{
{
f = e->next_callee;
cgraph_call_edge_removal_hooks (e);
- cgraph_edge_remove_callee (e);
+ if (!e->indirect_unknown_callee)
+ cgraph_edge_remove_callee (e);
cgraph_free_edge (e);
}
+ for (e = node->indirect_calls; e; e = f)
+ {
+ f = e->next_callee;
+ cgraph_call_edge_removal_hooks (e);
+ if (!e->indirect_unknown_callee)
+ cgraph_edge_remove_callee (e);
+ cgraph_free_edge (e);
+ }
+ node->indirect_calls = NULL;
node->callees = NULL;
if (node->call_site_hash)
{
pop_cfun();
gimple_set_body (node->decl, NULL);
VEC_free (ipa_opt_pass, heap,
- DECL_STRUCT_FUNCTION (node->decl)->ipa_transforms_to_apply);
+ node->ipa_transforms_to_apply);
/* Struct function hangs a lot of data that would leak if we didn't
removed all pointers to it. */
ggc_free (DECL_STRUCT_FUNCTION (node->decl));
DECL_INITIAL (node->decl) = error_mark_node;
}
+/* Remove same body alias node. */
+
+void
+cgraph_remove_same_body_alias (struct cgraph_node *node)
+{
+ void **slot;
+ int uid = node->uid;
+
+ gcc_assert (node->same_body_alias);
+ if (node->previous)
+ node->previous->next = node->next;
+ else
+ node->same_body->same_body = node->next;
+ if (node->next)
+ node->next->previous = node->previous;
+ node->next = NULL;
+ node->previous = NULL;
+ slot = htab_find_slot (cgraph_hash, node, NO_INSERT);
+ if (*slot == node)
+ htab_clear_slot (cgraph_hash, slot);
+ if (assembler_name_hash)
+ {
+ tree name = DECL_ASSEMBLER_NAME (node->decl);
+ slot = htab_find_slot_with_hash (assembler_name_hash, name,
+ decl_assembler_name_hash (name),
+ NO_INSERT);
+ if (slot && *slot == node)
+ htab_clear_slot (assembler_name_hash, slot);
+ }
+
+ /* Clear out the node to NULL all pointers and add the node to the free
+ list. */
+ memset (node, 0, sizeof(*node));
+ node->uid = uid;
+ NEXT_FREE_NODE (node) = free_nodes;
+ free_nodes = node;
+}
+
/* Remove the node from cgraph. */
void
cgraph_call_node_removal_hooks (node);
cgraph_node_remove_callers (node);
cgraph_node_remove_callees (node);
+ ipa_remove_all_references (&node->ref_list);
+ ipa_remove_all_refering (&node->ref_list);
+ VEC_free (ipa_opt_pass, heap,
+ node->ipa_transforms_to_apply);
/* Incremental inlining access removed nodes stored in the postorder list.
*/
= next_inline_clone->prev_sibling_clone;
if (next_inline_clone->prev_sibling_clone)
{
+ gcc_assert (node->clones != next_inline_clone);
next_inline_clone->prev_sibling_clone->next_sibling_clone
= next_inline_clone->next_sibling_clone;
}
else
- node->clones = next_inline_clone->next_sibling_clone;
+ {
+ gcc_assert (node->clones == next_inline_clone);
+ node->clones = next_inline_clone->next_sibling_clone;
+ }
new_clones = node->clones;
node->clones = NULL;
next_inline_clone->next_sibling_clone = NULL;
if (node->clone_of)
{
+ if (node->clone_of->clones)
+ node->clone_of->clones->prev_sibling_clone = next_inline_clone;
next_inline_clone->next_sibling_clone = node->clone_of->clones;
node->clone_of->clones = next_inline_clone;
}
}
}
- else
- gcc_assert (node->clone_of);
if (node->prev_sibling_clone)
node->prev_sibling_clone->next_sibling_clone = node->next_sibling_clone;
else if (node->clone_of)
node->next_sibling_clone->prev_sibling_clone = node->prev_sibling_clone;
if (node->clones)
{
- struct cgraph_node *n;
+ struct cgraph_node *n, *next;
+
+ if (node->clone_of)
+ {
+ for (n = node->clones; n->next_sibling_clone; n = n->next_sibling_clone)
+ n->clone_of = node->clone_of;
+ n->clone_of = node->clone_of;
+ n->next_sibling_clone = node->clone_of->clones;
+ if (node->clone_of->clones)
+ node->clone_of->clones->prev_sibling_clone = n;
+ node->clone_of->clones = node->clones;
+ }
+ else
+ {
+ /* We are removing node with clones. this makes clones inconsistent,
+ but assume they will be removed subsequently and just keep clone
+ tree intact. This can happen in unreachable function removal since
+ we remove unreachable functions in random order, not by bottom-up
+ walk of clone trees. */
+ for (n = node->clones; n; n = next)
+ {
+ next = n->next_sibling_clone;
+ n->next_sibling_clone = NULL;
+ n->prev_sibling_clone = NULL;
+ n->clone_of = NULL;
+ }
+ }
+ }
- for (n = node->clones; n->next_sibling_clone; n = n->next_sibling_clone)
- n->clone_of = node->clone_of;
- n->clone_of = node->clone_of;
- n->next_sibling_clone = node->clone_of->clones;
- if (node->clone_of->clones)
- node->clone_of->clones->prev_sibling_clone = n;
- node->clone_of->clones = node->clones;
+ while (node->same_body)
+ cgraph_remove_same_body_alias (node->same_body);
+
+ if (node->same_comdat_group)
+ {
+ struct cgraph_node *prev;
+ for (prev = node->same_comdat_group;
+ prev->same_comdat_group != node;
+ prev = prev->same_comdat_group)
+ ;
+ if (node->same_comdat_group == prev)
+ prev->same_comdat_group = NULL;
+ else
+ prev->same_comdat_group = node->same_comdat_group;
+ node->same_comdat_group = NULL;
}
/* While all the clones are removed after being proceeded, the function
struct cgraph_node *n = (struct cgraph_node *) *slot;
if (!n->clones && !n->clone_of && !n->global.inlined_to
&& (cgraph_global_info_ready
- && (TREE_ASM_WRITTEN (n->decl) || DECL_EXTERNAL (n->decl))))
+ && (TREE_ASM_WRITTEN (n->decl) || DECL_EXTERNAL (n->decl)
+ || n->in_other_partition)))
kill_body = true;
}
if (assembler_name_hash)
{
if (!node->reachable && node->local.finalized)
{
- notice_global_symbol (node->decl);
+ if (cgraph_global_info_ready)
+ {
+ /* Verify that function does not appear to be needed out of blue
+ during the optimization process. This can happen for extern
+ inlines when bodies was removed after inlining. */
+ gcc_assert ((node->analyzed || DECL_EXTERNAL (node->decl)));
+ }
+ else
+ notice_global_symbol (node->decl);
node->reachable = 1;
- gcc_assert (!cgraph_global_info_ready);
node->next_needed = cgraph_nodes_queue;
cgraph_nodes_queue = node;
cgraph_mark_needed_node (struct cgraph_node *node)
{
node->needed = 1;
+ gcc_assert (!node->global.inlined_to);
cgraph_mark_reachable_node (node);
}
void
cgraph_mark_address_taken_node (struct cgraph_node *node)
{
+ cgraph_mark_reachable_node (node);
node->address_taken = 1;
- cgraph_mark_needed_node (node);
}
/* Return local info for the compiled function. */
dump_cgraph_node (FILE *f, struct cgraph_node *node)
{
struct cgraph_edge *edge;
- fprintf (f, "%s/%i(%i) [%p]:", cgraph_node_name (node), node->uid,
- node->pid, (void *) node);
+ int indirect_calls_count = 0;
+
+ fprintf (f, "%s/%i(%i)", cgraph_node_name (node), node->uid,
+ node->pid);
+ dump_addr (f, " @", (void *)node);
+ if (DECL_ASSEMBLER_NAME_SET_P (node->decl))
+ fprintf (f, " (asm: %s)", IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (node->decl)));
if (node->global.inlined_to)
fprintf (f, " (inline copy in %s/%i)",
cgraph_node_name (node->global.inlined_to),
if (cgraph_function_flags_ready)
fprintf (f, " availability:%s",
cgraph_availability_names [cgraph_function_body_availability (node)]);
+ if (node->analyzed)
+ fprintf (f, " analyzed");
+ if (node->in_other_partition)
+ fprintf (f, " in_other_partition");
if (node->count)
fprintf (f, " executed "HOST_WIDEST_INT_PRINT_DEC"x",
(HOST_WIDEST_INT)node->count);
- if (node->local.inline_summary.self_insns)
- fprintf (f, " %i insns", node->local.inline_summary.self_insns);
- if (node->global.insns && node->global.insns
- != node->local.inline_summary.self_insns)
- fprintf (f, " (%i after inlining)", node->global.insns);
+ if (node->local.inline_summary.self_time)
+ fprintf (f, " %i time, %i benefit", node->local.inline_summary.self_time,
+ node->local.inline_summary.time_inlining_benefit);
+ if (node->global.time && node->global.time
+ != node->local.inline_summary.self_time)
+ fprintf (f, " (%i after inlining)", node->global.time);
+ if (node->local.inline_summary.self_size)
+ fprintf (f, " %i size, %i benefit", node->local.inline_summary.self_size,
+ node->local.inline_summary.size_inlining_benefit);
+ if (node->global.size && node->global.size
+ != node->local.inline_summary.self_size)
+ fprintf (f, " (%i after inlining)", node->global.size);
if (node->local.inline_summary.estimated_self_stack_size)
fprintf (f, " %i bytes stack usage", (int)node->local.inline_summary.estimated_self_stack_size);
if (node->global.estimated_stack_size != node->local.inline_summary.estimated_self_stack_size)
fprintf (f, " address_taken");
else if (node->reachable)
fprintf (f, " reachable");
+ else if (node->reachable_from_other_partition)
+ fprintf (f, " reachable_from_other_partition");
if (gimple_has_body_p (node->decl))
fprintf (f, " body");
if (node->process)
fprintf (f, " always_inline");
else if (node->local.inlinable)
fprintf (f, " inlinable");
+ else if (node->local.versionable)
+ fprintf (f, " versionable");
if (node->local.redefined_extern_inline)
fprintf (f, " redefined_extern_inline");
if (TREE_ASM_WRITTEN (node->decl))
edge->frequency / (double)CGRAPH_FREQ_BASE);
if (!edge->inline_failed)
fprintf(f, "(inlined) ");
- if (edge->indirect_call)
- fprintf(f, "(indirect) ");
+ if (edge->indirect_inlining_edge)
+ fprintf(f, "(indirect_inlining) ");
if (edge->can_throw_external)
fprintf(f, "(can throw external) ");
}
edge->callee->uid);
if (!edge->inline_failed)
fprintf(f, "(inlined) ");
- if (edge->indirect_call)
- fprintf(f, "(indirect) ");
+ if (edge->indirect_inlining_edge)
+ fprintf(f, "(indirect_inlining) ");
if (edge->count)
fprintf (f, "("HOST_WIDEST_INT_PRINT_DEC"x) ",
(HOST_WIDEST_INT)edge->count);
fprintf(f, "(can throw external) ");
}
fprintf (f, "\n");
+ fprintf (f, " References: ");
+ ipa_dump_references (f, &node->ref_list);
+ fprintf (f, " Refering this function: ");
+ ipa_dump_refering (f, &node->ref_list);
+
+ for (edge = node->indirect_calls; edge; edge = edge->next_callee)
+ indirect_calls_count++;
+ if (indirect_calls_count)
+ fprintf (f, " has %i outgoing edges for indirect calls.\n",
+ indirect_calls_count);
+
+ if (node->same_body)
+ {
+ struct cgraph_node *n;
+ fprintf (f, " aliases & thunks:");
+ for (n = node->same_body; n; n = n->next)
+ {
+ fprintf (f, " %s/%i", cgraph_node_name (n), n->uid);
+ if (n->thunk.thunk_p)
+ {
+ fprintf (f, " (thunk of %s fixed ofset %i virtual value %i has "
+ "virtual offset %i",
+ lang_hooks.decl_printable_name (n->thunk.alias, 2),
+ (int)n->thunk.fixed_offset,
+ (int)n->thunk.virtual_value,
+ (int)n->thunk.virtual_offset_p);
+ fprintf (f, ")");
+ }
+ if (DECL_ASSEMBLER_NAME_SET_P (n->decl))
+ fprintf (f, " (asm: %s)", IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl)));
+ }
+ fprintf (f, "\n");
+ }
}
/* Create clone of E in the node N represented by CALL_EXPR the callgraph. */
struct cgraph_edge *
cgraph_clone_edge (struct cgraph_edge *e, struct cgraph_node *n,
- gimple call_stmt, gcov_type count_scale, int freq_scale,
- int loop_nest, bool update_original)
+ gimple call_stmt, unsigned stmt_uid, gcov_type count_scale,
+ int freq_scale, int loop_nest, bool update_original)
{
struct cgraph_edge *new_edge;
gcov_type count = e->count * count_scale / REG_BR_PROB_BASE;
- gcov_type freq = e->frequency * (gcov_type) freq_scale / CGRAPH_FREQ_BASE;
+ gcov_type freq;
+ /* We do not want to ignore loop nest after frequency drops to 0. */
+ if (!freq_scale)
+ freq_scale = 1;
+ freq = e->frequency * (gcov_type) freq_scale / CGRAPH_FREQ_BASE;
if (freq > CGRAPH_FREQ_MAX)
freq = CGRAPH_FREQ_MAX;
- new_edge = cgraph_create_edge (n, e->callee, call_stmt, count, freq,
- e->loop_nest + loop_nest);
+
+ if (e->indirect_unknown_callee)
+ {
+ tree decl;
+
+ if (call_stmt && (decl = gimple_call_fndecl (call_stmt)))
+ {
+ struct cgraph_node *callee = cgraph_node (decl);
+ new_edge = cgraph_create_edge (n, callee, call_stmt, count, freq,
+ e->loop_nest + loop_nest);
+ }
+ else
+ {
+ new_edge = cgraph_create_indirect_edge (n, call_stmt,
+ e->indirect_info->ecf_flags,
+ count, freq,
+ e->loop_nest + loop_nest);
+ *new_edge->indirect_info = *e->indirect_info;
+ }
+ }
+ else
+ new_edge = cgraph_create_edge (n, e->callee, call_stmt, count, freq,
+ e->loop_nest + loop_nest);
new_edge->inline_failed = e->inline_failed;
- new_edge->indirect_call = e->indirect_call;
+ new_edge->indirect_inlining_edge = e->indirect_inlining_edge;
+ new_edge->lto_stmt_uid = stmt_uid;
if (update_original)
{
e->count -= new_edge->count;
/* Create node representing clone of N executed COUNT times. Decrease
the execution counts from original node too.
+ The new clone will have decl set to DECL that may or may not be the same
+ as decl of N.
When UPDATE_ORIGINAL is true, the counts are subtracted from the original
function's profile to reflect the fact that part of execution is handled
by node. */
struct cgraph_node *
-cgraph_clone_node (struct cgraph_node *n, gcov_type count, int freq,
- int loop_nest, bool update_original)
+cgraph_clone_node (struct cgraph_node *n, tree decl, gcov_type count, int freq,
+ int loop_nest, bool update_original,
+ VEC(cgraph_edge_p,heap) *redirect_callers)
{
struct cgraph_node *new_node = cgraph_create_node ();
struct cgraph_edge *e;
gcov_type count_scale;
+ unsigned i;
- new_node->decl = n->decl;
+ new_node->decl = decl;
new_node->origin = n->origin;
if (new_node->origin)
{
}
new_node->analyzed = n->analyzed;
new_node->local = n->local;
+ new_node->local.externally_visible = false;
+ new_node->local.local = true;
+ new_node->local.vtable_method = false;
new_node->global = n->global;
new_node->rtl = n->rtl;
new_node->count = count;
+ new_node->frequency = n->frequency;
new_node->clone = n->clone;
+ new_node->clone.tree_map = 0;
if (n->count)
{
if (new_node->count > n->count)
n->count = 0;
}
+ for (i = 0; VEC_iterate (cgraph_edge_p, redirect_callers, i, e); i++)
+ {
+ /* Redirect calls to the old version node to point to its new
+ version. */
+ cgraph_redirect_edge_callee (e, new_node);
+ }
+
+
for (e = n->callees;e; e=e->next_callee)
- cgraph_clone_edge (e, new_node, e->call_stmt, count_scale, freq, loop_nest,
- update_original);
+ cgraph_clone_edge (e, new_node, e->call_stmt, e->lto_stmt_uid,
+ count_scale, freq, loop_nest, update_original);
+
+ for (e = n->indirect_calls; e; e = e->next_callee)
+ cgraph_clone_edge (e, new_node, e->call_stmt, e->lto_stmt_uid,
+ count_scale, freq, loop_nest, update_original);
+ ipa_clone_references (new_node, NULL, &n->ref_list);
new_node->next_sibling_clone = n->clones;
if (n->clones)
new_node->clone_of = n;
cgraph_call_node_duplication_hooks (n, new_node);
+ if (n->decl != decl)
+ {
+ struct cgraph_node **slot;
+ slot = (struct cgraph_node **) htab_find_slot (cgraph_hash, new_node, INSERT);
+ gcc_assert (!*slot);
+ *slot = new_node;
+ if (assembler_name_hash)
+ {
+ void **aslot;
+ tree name = DECL_ASSEMBLER_NAME (decl);
+
+ aslot = htab_find_slot_with_hash (assembler_name_hash, name,
+ decl_assembler_name_hash (name),
+ INSERT);
+ gcc_assert (!*aslot);
+ *aslot = new_node;
+ }
+ }
return new_node;
}
}
/* Create callgraph node clone with new declaration. The actual body will
- be copied later at compilation stage.
+ be copied later at compilation stage.
TODO: after merging in ipa-sra use function call notes instead of args_to_skip
bitmap interface.
tree old_decl = old_node->decl;
struct cgraph_node *new_node = NULL;
tree new_decl;
- struct cgraph_node key, **slot;
- unsigned i;
- struct cgraph_edge *e;
+ size_t i;
+ struct ipa_replace_map *map;
- gcc_assert (tree_versionable_function_p (old_decl));
+#ifdef ENABLE_CHECKING
+ if (!flag_wpa)
+ gcc_assert (tree_versionable_function_p (old_decl));
+#endif
/* Make a new FUNCTION_DECL tree node */
if (!args_to_skip)
SET_DECL_ASSEMBLER_NAME (new_decl, DECL_NAME (new_decl));
SET_DECL_RTL (new_decl, NULL);
- new_node = cgraph_clone_node (old_node, old_node->count,
- CGRAPH_FREQ_BASE, 0, false);
- new_node->decl = new_decl;
+ new_node = cgraph_clone_node (old_node, new_decl, old_node->count,
+ CGRAPH_FREQ_BASE, 0, false,
+ redirect_callers);
/* Update the properties.
Make clone visible only within this translation unit. Make sure
that is not weak also.
??? We cannot use COMDAT linkage because there is no
ABI support for this. */
DECL_EXTERNAL (new_node->decl) = 0;
- DECL_ONE_ONLY (new_node->decl) = 0;
+ DECL_COMDAT_GROUP (new_node->decl) = 0;
TREE_PUBLIC (new_node->decl) = 0;
DECL_COMDAT (new_node->decl) = 0;
DECL_WEAK (new_node->decl) = 0;
new_node->clone.tree_map = tree_map;
new_node->clone.args_to_skip = args_to_skip;
+ for (i = 0; VEC_iterate (ipa_replace_map_p, tree_map, i, map); i++)
+ {
+ tree var = map->new_tree;
+
+ STRIP_NOPS (var);
+ if (TREE_CODE (var) != ADDR_EXPR)
+ continue;
+ var = get_base_var (var);
+ if (!var)
+ continue;
+
+ /* Record references of the future statement initializing the constant
+ argument. */
+ if (TREE_CODE (var) == FUNCTION_DECL)
+ ipa_record_reference (new_node, NULL, cgraph_node (var),
+ NULL, IPA_REF_ADDR, NULL);
+ else if (TREE_CODE (var) == VAR_DECL)
+ ipa_record_reference (new_node, NULL, NULL, varpool_node (var),
+ IPA_REF_ADDR, NULL);
+ }
+ if (!args_to_skip)
+ new_node->clone.combined_args_to_skip = old_node->clone.combined_args_to_skip;
+ else if (old_node->clone.combined_args_to_skip)
+ {
+ int newi = 0, oldi = 0;
+ tree arg;
+ bitmap new_args_to_skip = BITMAP_GGC_ALLOC ();
+ struct cgraph_node *orig_node;
+ for (orig_node = old_node; orig_node->clone_of; orig_node = orig_node->clone_of)
+ ;
+ for (arg = DECL_ARGUMENTS (orig_node->decl); arg; arg = TREE_CHAIN (arg), oldi++)
+ {
+ if (bitmap_bit_p (old_node->clone.combined_args_to_skip, oldi))
+ {
+ bitmap_set_bit (new_args_to_skip, oldi);
+ continue;
+ }
+ if (bitmap_bit_p (args_to_skip, newi))
+ bitmap_set_bit (new_args_to_skip, oldi);
+ newi++;
+ }
+ new_node->clone.combined_args_to_skip = new_args_to_skip;
+ }
+ else
+ new_node->clone.combined_args_to_skip = args_to_skip;
new_node->local.externally_visible = 0;
new_node->local.local = 1;
new_node->lowered = true;
new_node->reachable = true;
- key.decl = new_decl;
- slot = (struct cgraph_node **) htab_find_slot (cgraph_hash, &key, INSERT);
- gcc_assert (!*slot);
- *slot = new_node;
- if (assembler_name_hash)
- {
- void **aslot;
- tree name = DECL_ASSEMBLER_NAME (new_decl);
- aslot = htab_find_slot_with_hash (assembler_name_hash, name,
- decl_assembler_name_hash (name),
- INSERT);
- gcc_assert (!*aslot);
- *aslot = new_node;
- }
- for (i = 0; VEC_iterate (cgraph_edge_p, redirect_callers, i, e); i++)
- {
- /* Redirect calls to the old version node to point to its new
- version. */
- cgraph_redirect_edge_callee (e, new_node);
- }
-
return new_node;
}
GIMPLE.
The function is assumed to be reachable and have address taken (so no
- API breaking optimizations are performed on it).
+ API breaking optimizations are performed on it).
Main work done by this function is to enqueue the function for later
processing to avoid need the passes to be re-entrant. */
current_function_decl = NULL;
break;
}
+
+ /* Set a personality if required and we already passed EH lowering. */
+ if (lowered
+ && (function_needs_eh_personality (DECL_STRUCT_FUNCTION (fndecl))
+ == eh_personality_lang))
+ DECL_FUNCTION_PERSONALITY (fndecl) = lang_hooks.eh_personality ();
+}
+
+/* Return true if NODE can be made local for API change.
+ Extern inline functions and C++ COMDAT functions can be made local
+ at the expense of possible code size growth if function is used in multiple
+ compilation units. */
+bool
+cgraph_node_can_be_local_p (struct cgraph_node *node)
+{
+ return (!node->needed && !node->address_taken
+ && ((DECL_COMDAT (node->decl) && !node->same_comdat_group)
+ || !node->local.externally_visible));
+}
+
+/* Make DECL local. FIXME: We shouldn't need to mess with rtl this early,
+ but other code such as notice_global_symbol generates rtl. */
+void
+cgraph_make_decl_local (tree decl)
+{
+ rtx rtl, symbol;
+
+ if (TREE_CODE (decl) == VAR_DECL)
+ DECL_COMMON (decl) = 0;
+ else if (TREE_CODE (decl) == FUNCTION_DECL)
+ {
+ DECL_COMDAT (decl) = 0;
+ DECL_COMDAT_GROUP (decl) = 0;
+ DECL_WEAK (decl) = 0;
+ DECL_EXTERNAL (decl) = 0;
+ }
+ else
+ gcc_unreachable ();
+ TREE_PUBLIC (decl) = 0;
+ if (!DECL_RTL_SET_P (decl))
+ return;
+
+ /* Update rtl flags. */
+ make_decl_rtl (decl);
+
+ rtl = DECL_RTL (decl);
+ if (!MEM_P (rtl))
+ return;
+
+ symbol = XEXP (rtl, 0);
+ if (GET_CODE (symbol) != SYMBOL_REF)
+ return;
+
+ SYMBOL_REF_WEAK (symbol) = DECL_WEAK (decl);
+}
+
+/* Bring NODE local. */
+void
+cgraph_make_node_local (struct cgraph_node *node)
+{
+ gcc_assert (cgraph_node_can_be_local_p (node));
+ if (DECL_COMDAT (node->decl) || DECL_EXTERNAL (node->decl))
+ {
+ struct cgraph_node *alias;
+ cgraph_make_decl_local (node->decl);
+
+ for (alias = node->same_body; alias; alias = alias->next)
+ cgraph_make_decl_local (alias->decl);
+
+ node->local.externally_visible = false;
+ node->local.local = true;
+ gcc_assert (cgraph_function_body_availability (node) == AVAIL_LOCAL);
+ }
+}
+
+/* Set TREE_NOTHROW on NODE's decl and on same_body aliases of NODE
+ if any to NOTHROW. */
+
+void
+cgraph_set_nothrow_flag (struct cgraph_node *node, bool nothrow)
+{
+ struct cgraph_node *alias;
+ TREE_NOTHROW (node->decl) = nothrow;
+ for (alias = node->same_body; alias; alias = alias->next)
+ TREE_NOTHROW (alias->decl) = nothrow;
+}
+
+/* Set TREE_READONLY on NODE's decl and on same_body aliases of NODE
+ if any to READONLY. */
+
+void
+cgraph_set_readonly_flag (struct cgraph_node *node, bool readonly)
+{
+ struct cgraph_node *alias;
+ TREE_READONLY (node->decl) = readonly;
+ for (alias = node->same_body; alias; alias = alias->next)
+ TREE_READONLY (alias->decl) = readonly;
+}
+
+/* Set DECL_PURE_P on NODE's decl and on same_body aliases of NODE
+ if any to PURE. */
+
+void
+cgraph_set_pure_flag (struct cgraph_node *node, bool pure)
+{
+ struct cgraph_node *alias;
+ DECL_PURE_P (node->decl) = pure;
+ for (alias = node->same_body; alias; alias = alias->next)
+ DECL_PURE_P (alias->decl) = pure;
+}
+
+/* Set DECL_LOOPING_CONST_OR_PURE_P on NODE's decl and on
+ same_body aliases of NODE if any to LOOPING_CONST_OR_PURE. */
+
+void
+cgraph_set_looping_const_or_pure_flag (struct cgraph_node *node,
+ bool looping_const_or_pure)
+{
+ struct cgraph_node *alias;
+ DECL_LOOPING_CONST_OR_PURE_P (node->decl) = looping_const_or_pure;
+ for (alias = node->same_body; alias; alias = alias->next)
+ DECL_LOOPING_CONST_OR_PURE_P (alias->decl) = looping_const_or_pure;
+}
+
+/* See if the frequency of NODE can be updated based on frequencies of its
+ callers. */
+bool
+cgraph_propagate_frequency (struct cgraph_node *node)
+{
+ bool maybe_unlikely_executed = true, maybe_executed_once = true;
+ struct cgraph_edge *edge;
+ if (!node->local.local)
+ return false;
+ gcc_assert (node->analyzed);
+ if (node->frequency == NODE_FREQUENCY_HOT)
+ return false;
+ if (node->frequency == NODE_FREQUENCY_UNLIKELY_EXECUTED)
+ return false;
+ if (dump_file && (dump_flags & TDF_DETAILS))
+ fprintf (dump_file, "Processing frequency %s\n", cgraph_node_name (node));
+ for (edge = node->callers;
+ edge && (maybe_unlikely_executed || maybe_executed_once);
+ edge = edge->next_caller)
+ {
+ if (!edge->frequency)
+ continue;
+ switch (edge->caller->frequency)
+ {
+ case NODE_FREQUENCY_UNLIKELY_EXECUTED:
+ break;
+ case NODE_FREQUENCY_EXECUTED_ONCE:
+ if (dump_file && (dump_flags & TDF_DETAILS))
+ fprintf (dump_file, " Called by %s that is executed once\n", cgraph_node_name (node));
+ maybe_unlikely_executed = false;
+ if (edge->loop_nest)
+ {
+ maybe_executed_once = false;
+ if (dump_file && (dump_flags & TDF_DETAILS))
+ fprintf (dump_file, " Called in loop\n");
+ }
+ break;
+ case NODE_FREQUENCY_HOT:
+ case NODE_FREQUENCY_NORMAL:
+ if (dump_file && (dump_flags & TDF_DETAILS))
+ fprintf (dump_file, " Called by %s that is normal or hot\n", cgraph_node_name (node));
+ maybe_unlikely_executed = false;
+ maybe_executed_once = false;
+ break;
+ }
+ }
+ if (maybe_unlikely_executed)
+ {
+ node->frequency = NODE_FREQUENCY_UNLIKELY_EXECUTED;
+ if (dump_file)
+ fprintf (dump_file, "Node %s promoted to unlikely executed.\n", cgraph_node_name (node));
+ return true;
+ }
+ if (maybe_executed_once && node->frequency != NODE_FREQUENCY_EXECUTED_ONCE)
+ {
+ node->frequency = NODE_FREQUENCY_EXECUTED_ONCE;
+ if (dump_file)
+ fprintf (dump_file, "Node %s promoted to executed once.\n", cgraph_node_name (node));
+ return true;
+ }
+ return false;
}
#include "gt-cgraph.h"
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