slot = (struct cgraph_node **) htab_find_slot (cgraph_hash, &key, INSERT);
if (*slot)
- return *slot;
+ {
+ node = *slot;
+ if (!node->master_clone)
+ node->master_clone = node;
+ return node;
+ }
node = cgraph_create_node ();
node->decl = decl;
node->origin = cgraph_node (DECL_CONTEXT (decl));
node->next_nested = node->origin->nested;
node->origin->nested = node;
+ node->master_clone = node;
}
return node;
}
{
if (node->next_clone)
{
- *slot = node->next_clone;
+ struct cgraph_node *new_node = node->next_clone;
+ struct cgraph_node *n;
+
+ /* Make the next clone be the master clone */
+ for (n = new_node; n; n = n->next_clone)
+ n->master_clone = new_node;
+
+ *slot = new_node;
node->next_clone->prev_clone = NULL;
}
else
return lang_hooks.decl_printable_name (node->decl, 2);
}
+/* Names used to print out the availability enum. */
+static const char * const availability_names[] =
+ {"unset", "not_available", "overwrittable", "available", "local"};
+
/* Dump given cgraph node. */
void
dump_cgraph_node (FILE *f, struct cgraph_node *node)
fprintf (f, " (inline copy in %s/%i)",
cgraph_node_name (node->global.inlined_to),
node->global.inlined_to->uid);
+ if (cgraph_function_flags_ready)
+ fprintf (f, " availability:%s",
+ availability_names [cgraph_function_body_availability (node)]);
+ if (node->master_clone && node->master_clone->uid != node->uid)
+ fprintf (f, "(%i)", node->master_clone->uid);
if (node->count)
fprintf (f, " executed "HOST_WIDEST_INT_PRINT_DEC"x",
(HOST_WIDEST_INT)node->count);
fprintf (f, " output");
if (node->local.local)
fprintf (f, " local");
+ if (node->local.externally_visible)
+ fprintf (f, " externally_visible");
+ if (node->local.finalized)
+ fprintf (f, " finalized");
if (node->local.disregard_inline_limits)
fprintf (f, " always_inline");
else if (node->local.inlinable)
fprintf (f, " inlinable");
+ if (node->local.redefined_extern_inline)
+ fprintf (f, " redefined_extern_inline");
if (TREE_ASM_WRITTEN (node->decl))
fprintf (f, " asm_written");
edge->callee->uid);
if (!edge->inline_failed)
fprintf(f, "(inlined) ");
+ if (edge->count)
+ fprintf (f, "("HOST_WIDEST_INT_PRINT_DEC"x) ",
+ (HOST_WIDEST_INT)edge->count);
+ if (edge->loop_nest)
+ fprintf (f, "(nested in %i loops) ", edge->loop_nest);
}
fprintf (f, "\n");
}
dump_cgraph_varpool_node (FILE *f, struct cgraph_varpool_node *node)
{
fprintf (f, "%s:", cgraph_varpool_node_name (node));
+ fprintf (f, " availability:%s", availability_names [cgraph_variable_initializer_availability (node)]);
if (DECL_INITIAL (node->decl))
fprintf (f, " initialized");
if (node->needed)
fprintf (f, " finalized");
if (node->output)
fprintf (f, " output");
+ if (node->externally_visible)
+ fprintf (f, " externally_visible");
fprintf (f, "\n");
}
if (node->needed)
return true;
- /* Externally visible functions must be output. The exception is
- COMDAT functions that must be output only when they are needed. */
+ /* Externally visible variables must be output. The exception is
+ COMDAT variables that must be output only when they are needed. */
if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl) && !DECL_EXTERNAL (decl))
return true;
if (decide_is_variable_needed (node, decl))
cgraph_varpool_mark_needed_node (node);
+ /* Since we reclaim unreachable nodes at the end of every language
+ level unit, we need to be conservative about possible entry points
+ there. */
+ if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl) && !DECL_EXTERNAL (decl))
+ cgraph_varpool_mark_needed_node (node);
if (cgraph_global_info_ready || !flag_unit_at_a_time)
cgraph_varpool_assemble_pending_decls ();
}
new->local = n->local;
new->global = n->global;
new->rtl = n->rtl;
+ new->master_clone = n->master_clone;
new->count = count;
if (n->count)
count_scale = new->count * REG_BR_PROB_BASE / n->count;
return new;
}
+/* Return true if N is an master_clone, (see cgraph_master_clone). */
+
+bool
+cgraph_is_master_clone (struct cgraph_node *n)
+{
+ return (n == cgraph_master_clone (n));
+}
+
+struct cgraph_node *
+cgraph_master_clone (struct cgraph_node *n)
+{
+ enum availability avail = cgraph_function_body_availability (n);
+
+ if (avail == AVAIL_NOT_AVAILABLE || avail == AVAIL_OVERWRITABLE)
+ return NULL;
+
+ if (!n->master_clone)
+ n->master_clone = cgraph_node (n->decl);
+
+ return n->master_clone;
+}
+
/* NODE is no longer nested function; update cgraph accordingly. */
void
cgraph_unnest_node (struct cgraph_node *node)
*node2 = node->next_nested;
node->origin = NULL;
}
+
+/* Return function availability. See cgraph.h for description of individual
+ return values. */
+enum availability
+cgraph_function_body_availability (struct cgraph_node *node)
+{
+ enum availability avail;
+ gcc_assert (cgraph_function_flags_ready);
+ if (!node->local.finalized)
+ avail = AVAIL_NOT_AVAILABLE;
+ else if (node->local.local)
+ avail = AVAIL_LOCAL;
+ else if (node->local.externally_visible)
+ avail = AVAIL_AVAILABLE;
+
+ /* If the function can be overwritten, return OVERWRITABLE. Take
+ care at least of two notable extensions - the COMDAT functions
+ used to share template instantiations in C++ (this is symmetric
+ to code cp_cannot_inline_tree_fn and probably shall be shared and
+ the inlinability hooks completely eliminated).
+
+ ??? Does the C++ one definition rule allow us to always return
+ AVAIL_AVAILABLE here? That would be good reason to preserve this
+ hook Similarly deal with extern inline functions - this is again
+ necessary to get C++ shared functions having keyed templates
+ right and in the C extension documentation we probably should
+ document the requirement of both versions of function (extern
+ inline and offline) having same side effect characteristics as
+ good optimization is what this optimization is about. */
+
+ else if (!(*targetm.binds_local_p) (node->decl)
+ && !DECL_COMDAT (node->decl) && !DECL_EXTERNAL (node->decl))
+ avail = AVAIL_OVERWRITABLE;
+ else avail = AVAIL_AVAILABLE;
+
+ return avail;
+}
+
+/* Return variable availability. See cgraph.h for description of individual
+ return values. */
+enum availability
+cgraph_variable_initializer_availability (struct cgraph_varpool_node *node)
+{
+ gcc_assert (cgraph_function_flags_ready);
+ if (!node->finalized)
+ return AVAIL_NOT_AVAILABLE;
+ if (!TREE_PUBLIC (node->decl))
+ return AVAIL_AVAILABLE;
+ /* If the variable can be overwritten, return OVERWRITABLE. Takes
+ care of at least two notable extensions - the COMDAT variables
+ used to share template instantiations in C++. */
+ if (!(*targetm.binds_local_p) (node->decl) && !DECL_COMDAT (node->decl))
+ return AVAIL_OVERWRITABLE;
+ return AVAIL_AVAILABLE;
+}
+
#include "gt-cgraph.h"
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