/* Callgraph construction.
- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009
- Free Software Foundation, Inc.
+ Copyright (C) 2003-2020 Free Software Foundation, Inc.
Contributed by Jan Hubicka
This file is part of GCC.
#include "config.h"
#include "system.h"
#include "coretypes.h"
-#include "tm.h"
+#include "backend.h"
#include "tree.h"
-#include "tree-flow.h"
-#include "langhooks.h"
-#include "pointer-set.h"
-#include "cgraph.h"
-#include "intl.h"
#include "gimple.h"
#include "tree-pass.h"
+#include "cgraph.h"
+#include "gimple-fold.h"
+#include "gimple-iterator.h"
+#include "gimple-walk.h"
+#include "ipa-utils.h"
+#include "except.h"
+
+/* Context of record_reference. */
+struct record_reference_ctx
+{
+ bool only_vars;
+ struct varpool_node *varpool_node;
+};
/* Walk tree and record all calls and references to functions/variables.
- Called via walk_tree: TP is pointer to tree to be examined.
+ Called via walk_tree: TP is pointer to tree to be examined.
When DATA is non-null, record references to callgraph.
*/
{
tree t = *tp;
tree decl;
- bool do_callgraph = data != NULL;
+ record_reference_ctx *ctx = (record_reference_ctx *)data;
+
+ t = canonicalize_constructor_val (t, NULL);
+ if (!t)
+ t = *tp;
+ else if (t != *tp)
+ *tp = t;
switch (TREE_CODE (t))
{
case VAR_DECL:
- if (TREE_STATIC (t) || DECL_EXTERNAL (t))
- {
- varpool_mark_needed_node (varpool_node (t));
- if (lang_hooks.callgraph.analyze_expr)
- return lang_hooks.callgraph.analyze_expr (tp, walk_subtrees);
- }
+ case FUNCTION_DECL:
+ gcc_unreachable ();
break;
case FDESC_EXPR:
case ADDR_EXPR:
/* Record dereferences to the functions. This makes the
functions reachable unconditionally. */
- decl = TREE_OPERAND (*tp, 0);
- if (TREE_CODE (decl) == FUNCTION_DECL && do_callgraph)
- cgraph_mark_address_taken_node (cgraph_node (decl));
+ decl = get_base_var (*tp);
+ if (TREE_CODE (decl) == FUNCTION_DECL)
+ {
+ cgraph_node *node = cgraph_node::get_create (decl);
+ if (!ctx->only_vars)
+ node->mark_address_taken ();
+ ctx->varpool_node->create_reference (node, IPA_REF_ADDR);
+ }
+
+ if (VAR_P (decl))
+ {
+ varpool_node *vnode = varpool_node::get_create (decl);
+ ctx->varpool_node->create_reference (vnode, IPA_REF_ADDR);
+ }
+ *walk_subtrees = 0;
break;
default:
*walk_subtrees = 0;
break;
}
-
- if ((unsigned int) TREE_CODE (t) >= LAST_AND_UNUSED_TREE_CODE)
- return lang_hooks.callgraph.analyze_expr (tp, walk_subtrees);
break;
}
return NULL_TREE;
}
-/* Reset inlining information of all incoming call edges of NODE. */
+/* Record references to typeinfos in the type list LIST. */
-void
-reset_inline_failed (struct cgraph_node *node)
+static void
+record_type_list (cgraph_node *node, tree list)
{
- struct cgraph_edge *e;
+ for (; list; list = TREE_CHAIN (list))
+ {
+ tree type = TREE_VALUE (list);
+
+ if (TYPE_P (type))
+ type = lookup_type_for_runtime (type);
+ STRIP_NOPS (type);
+ if (TREE_CODE (type) == ADDR_EXPR)
+ {
+ type = TREE_OPERAND (type, 0);
+ if (VAR_P (type))
+ {
+ varpool_node *vnode = varpool_node::get_create (type);
+ node->create_reference (vnode, IPA_REF_ADDR);
+ }
+ }
+ }
+}
+
+/* Record all references we will introduce by producing EH tables
+ for NODE. */
- for (e = node->callers; e; e = e->next_caller)
+static void
+record_eh_tables (cgraph_node *node, function *fun)
+{
+ eh_region i;
+
+ if (DECL_FUNCTION_PERSONALITY (node->decl))
{
- e->callee->global.inlined_to = NULL;
- if (!node->analyzed)
- e->inline_failed = CIF_BODY_NOT_AVAILABLE;
- else if (node->local.redefined_extern_inline)
- e->inline_failed = CIF_REDEFINED_EXTERN_INLINE;
- else if (!node->local.inlinable)
- e->inline_failed = CIF_FUNCTION_NOT_INLINABLE;
- else if (e->call_stmt_cannot_inline_p)
- e->inline_failed = CIF_MISMATCHED_ARGUMENTS;
+ tree per_decl = DECL_FUNCTION_PERSONALITY (node->decl);
+ cgraph_node *per_node = cgraph_node::get_create (per_decl);
+
+ node->create_reference (per_node, IPA_REF_ADDR);
+ per_node->mark_address_taken ();
+ }
+
+ i = fun->eh->region_tree;
+ if (!i)
+ return;
+
+ while (1)
+ {
+ switch (i->type)
+ {
+ case ERT_CLEANUP:
+ case ERT_MUST_NOT_THROW:
+ break;
+
+ case ERT_TRY:
+ {
+ eh_catch c;
+ for (c = i->u.eh_try.first_catch; c; c = c->next_catch)
+ record_type_list (node, c->type_list);
+ }
+ break;
+
+ case ERT_ALLOWED_EXCEPTIONS:
+ record_type_list (node, i->u.allowed.type_list);
+ break;
+ }
+ /* If there are sub-regions, process them. */
+ if (i->inner)
+ i = i->inner;
+ /* If there are peers, process them. */
+ else if (i->next_peer)
+ i = i->next_peer;
+ /* Otherwise, step back up the tree to the next peer. */
else
- e->inline_failed = CIF_FUNCTION_NOT_CONSIDERED;
+ {
+ do
+ {
+ i = i->outer;
+ if (i == NULL)
+ return;
+ }
+ while (i->next_peer == NULL);
+ i = i->next_peer;
+ }
}
}
int
compute_call_stmt_bb_frequency (tree decl, basic_block bb)
{
- int entry_freq = ENTRY_BLOCK_PTR->frequency;
- int freq = bb->frequency;
+ return bb->count.to_cgraph_frequency
+ (ENTRY_BLOCK_PTR_FOR_FN (DECL_STRUCT_FUNCTION (decl))->count);
+}
+
+/* Mark address taken in STMT. */
+
+static bool
+mark_address (gimple *stmt, tree addr, tree, void *data)
+{
+ addr = get_base_address (addr);
+ if (TREE_CODE (addr) == FUNCTION_DECL)
+ {
+ cgraph_node *node = cgraph_node::get_create (addr);
+ node->mark_address_taken ();
+ ((symtab_node *)data)->create_reference (node, IPA_REF_ADDR, stmt);
+ }
+ else if (addr && VAR_P (addr)
+ && (TREE_STATIC (addr) || DECL_EXTERNAL (addr)))
+ {
+ varpool_node *vnode = varpool_node::get_create (addr);
+
+ ((symtab_node *)data)->create_reference (vnode, IPA_REF_ADDR, stmt);
+ }
+
+ return false;
+}
+
+/* Mark load of T. */
+
+static bool
+mark_load (gimple *stmt, tree t, tree, void *data)
+{
+ t = get_base_address (t);
+ if (t && TREE_CODE (t) == FUNCTION_DECL)
+ {
+ /* ??? This can happen on platforms with descriptors when these are
+ directly manipulated in the code. Pretend that it's an address. */
+ cgraph_node *node = cgraph_node::get_create (t);
+ node->mark_address_taken ();
+ ((symtab_node *)data)->create_reference (node, IPA_REF_ADDR, stmt);
+ }
+ else if (t && VAR_P (t) && (TREE_STATIC (t) || DECL_EXTERNAL (t)))
+ {
+ varpool_node *vnode = varpool_node::get_create (t);
+
+ ((symtab_node *)data)->create_reference (vnode, IPA_REF_LOAD, stmt);
+ }
+ return false;
+}
- if (profile_status_for_function (DECL_STRUCT_FUNCTION (decl)) == PROFILE_ABSENT)
- return CGRAPH_FREQ_BASE;
+/* Mark store of T. */
+
+static bool
+mark_store (gimple *stmt, tree t, tree, void *data)
+{
+ t = get_base_address (t);
+ if (t && VAR_P (t) && (TREE_STATIC (t) || DECL_EXTERNAL (t)))
+ {
+ varpool_node *vnode = varpool_node::get_create (t);
- if (!entry_freq)
- entry_freq = 1, freq++;
+ ((symtab_node *)data)->create_reference (vnode, IPA_REF_STORE, stmt);
+ }
+ return false;
+}
- freq = freq * CGRAPH_FREQ_BASE / entry_freq;
- if (freq > CGRAPH_FREQ_MAX)
- freq = CGRAPH_FREQ_MAX;
+/* Record all references from cgraph_node that are taken in statement STMT. */
- return freq;
+void
+cgraph_node::record_stmt_references (gimple *stmt)
+{
+ walk_stmt_load_store_addr_ops (stmt, this, mark_load, mark_store,
+ mark_address);
}
/* Create cgraph edges for function calls.
Also look for functions and variables having addresses taken. */
-static unsigned int
-build_cgraph_edges (void)
+namespace {
+
+const pass_data pass_data_build_cgraph_edges =
+{
+ GIMPLE_PASS, /* type */
+ "*build_cgraph_edges", /* name */
+ OPTGROUP_NONE, /* optinfo_flags */
+ TV_NONE, /* tv_id */
+ PROP_cfg, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+};
+
+class pass_build_cgraph_edges : public gimple_opt_pass
+{
+public:
+ pass_build_cgraph_edges (gcc::context *ctxt)
+ : gimple_opt_pass (pass_data_build_cgraph_edges, ctxt)
+ {}
+
+ /* opt_pass methods: */
+ virtual unsigned int execute (function *);
+
+}; // class pass_build_cgraph_edges
+
+unsigned int
+pass_build_cgraph_edges::execute (function *fun)
{
basic_block bb;
- struct cgraph_node *node = cgraph_node (current_function_decl);
- struct pointer_set_t *visited_nodes = pointer_set_create ();
+ cgraph_node *node = cgraph_node::get (current_function_decl);
gimple_stmt_iterator gsi;
- tree step;
+ tree decl;
+ unsigned ix;
/* Create the callgraph edges and record the nodes referenced by the function.
body. */
- FOR_EACH_BB (bb)
- for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
- {
- gimple stmt = gsi_stmt (gsi);
- tree decl;
-
- if (is_gimple_call (stmt) && (decl = gimple_call_fndecl (stmt)))
- {
- size_t i;
- size_t n = gimple_call_num_args (stmt);
- cgraph_create_edge (node, cgraph_node (decl), stmt,
- bb->count, compute_call_stmt_bb_frequency (current_function_decl, bb),
- bb->loop_depth);
- for (i = 0; i < n; i++)
- walk_tree (gimple_call_arg_ptr (stmt, i), record_reference,
- node, visited_nodes);
- if (gimple_call_lhs (stmt))
- walk_tree (gimple_call_lhs_ptr (stmt), record_reference, node,
- visited_nodes);
- }
- else
- {
- struct walk_stmt_info wi;
- memset (&wi, 0, sizeof (wi));
- wi.info = node;
- wi.pset = visited_nodes;
- walk_gimple_op (stmt, record_reference, &wi);
- if (gimple_code (stmt) == GIMPLE_OMP_PARALLEL
- && gimple_omp_parallel_child_fn (stmt))
- {
- tree fn = gimple_omp_parallel_child_fn (stmt);
- cgraph_mark_needed_node (cgraph_node (fn));
- }
- if (gimple_code (stmt) == GIMPLE_OMP_TASK)
- {
- tree fn = gimple_omp_task_child_fn (stmt);
- if (fn)
- cgraph_mark_needed_node (cgraph_node (fn));
- fn = gimple_omp_task_copy_fn (stmt);
- if (fn)
- cgraph_mark_needed_node (cgraph_node (fn));
- }
- }
- }
+ FOR_EACH_BB_FN (bb, fun)
+ {
+ for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+ {
+ gimple *stmt = gsi_stmt (gsi);
+ tree decl;
+
+ if (is_gimple_debug (stmt))
+ continue;
+
+ if (gcall *call_stmt = dyn_cast <gcall *> (stmt))
+ {
+ decl = gimple_call_fndecl (call_stmt);
+ if (decl)
+ node->create_edge (cgraph_node::get_create (decl), call_stmt, bb->count);
+ else if (gimple_call_internal_p (call_stmt))
+ ;
+ else
+ node->create_indirect_edge (call_stmt,
+ gimple_call_flags (call_stmt),
+ bb->count);
+ }
+ node->record_stmt_references (stmt);
+ if (gomp_parallel *omp_par_stmt = dyn_cast <gomp_parallel *> (stmt))
+ {
+ tree fn = gimple_omp_parallel_child_fn (omp_par_stmt);
+ node->create_reference (cgraph_node::get_create (fn),
+ IPA_REF_ADDR, stmt);
+ }
+ if (gimple_code (stmt) == GIMPLE_OMP_TASK)
+ {
+ tree fn = gimple_omp_task_child_fn (stmt);
+ if (fn)
+ node->create_reference (cgraph_node::get_create (fn),
+ IPA_REF_ADDR, stmt);
+ fn = gimple_omp_task_copy_fn (stmt);
+ if (fn)
+ node->create_reference (cgraph_node::get_create (fn),
+ IPA_REF_ADDR, stmt);
+ }
+ }
+ for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+ node->record_stmt_references (gsi_stmt (gsi));
+ }
/* Look for initializers of constant variables and private statics. */
- for (step = cfun->local_decls;
- step;
- step = TREE_CHAIN (step))
- {
- tree decl = TREE_VALUE (step);
- if (TREE_CODE (decl) == VAR_DECL
- && (TREE_STATIC (decl) && !DECL_EXTERNAL (decl)))
- varpool_finalize_decl (decl);
- else if (TREE_CODE (decl) == VAR_DECL && DECL_INITIAL (decl))
- walk_tree (&DECL_INITIAL (decl), record_reference, node, visited_nodes);
- }
+ FOR_EACH_LOCAL_DECL (fun, ix, decl)
+ if (VAR_P (decl)
+ && (TREE_STATIC (decl) && !DECL_EXTERNAL (decl))
+ && !DECL_HAS_VALUE_EXPR_P (decl)
+ && TREE_TYPE (decl) != error_mark_node)
+ varpool_node::finalize_decl (decl);
+ record_eh_tables (node, fun);
- pointer_set_destroy (visited_nodes);
return 0;
}
-struct gimple_opt_pass pass_build_cgraph_edges =
+} // anon namespace
+
+gimple_opt_pass *
+make_pass_build_cgraph_edges (gcc::context *ctxt)
{
- {
- GIMPLE_PASS,
- NULL, /* name */
- NULL, /* gate */
- build_cgraph_edges, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- TV_NONE, /* tv_id */
- PROP_cfg, /* properties_required */
- 0, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- 0 /* todo_flags_finish */
- }
-};
+ return new pass_build_cgraph_edges (ctxt);
+}
/* Record references to functions and other variables present in the
- initial value of DECL, a variable.
+ initial value of DECL, a variable.
When ONLY_VARS is true, we mark needed only variables, not functions. */
void
record_references_in_initializer (tree decl, bool only_vars)
{
- struct pointer_set_t *visited_nodes = pointer_set_create ();
- walk_tree (&DECL_INITIAL (decl), record_reference,
- only_vars ? NULL : decl, visited_nodes);
- pointer_set_destroy (visited_nodes);
+ varpool_node *node = varpool_node::get_create (decl);
+ hash_set<tree> visited_nodes;
+ record_reference_ctx ctx = {false, NULL};
+
+ ctx.varpool_node = node;
+ ctx.only_vars = only_vars;
+ walk_tree (&DECL_INITIAL (decl), record_reference,
+ &ctx, &visited_nodes);
}
/* Rebuild cgraph edges for current function node. This needs to be run after
passes that don't update the cgraph. */
unsigned int
-rebuild_cgraph_edges (void)
+cgraph_edge::rebuild_edges (void)
{
basic_block bb;
- struct cgraph_node *node = cgraph_node (current_function_decl);
+ cgraph_node *node = cgraph_node::get (current_function_decl);
gimple_stmt_iterator gsi;
- cgraph_node_remove_callees (node);
+ node->remove_callees ();
+ node->remove_all_references ();
- node->count = ENTRY_BLOCK_PTR->count;
+ node->count = ENTRY_BLOCK_PTR_FOR_FN (cfun)->count;
- FOR_EACH_BB (bb)
- for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
- {
- gimple stmt = gsi_stmt (gsi);
- tree decl;
+ FOR_EACH_BB_FN (bb, cfun)
+ {
+ for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+ {
+ gimple *stmt = gsi_stmt (gsi);
+ tree decl;
+
+ if (gcall *call_stmt = dyn_cast <gcall *> (stmt))
+ {
+ decl = gimple_call_fndecl (call_stmt);
+ if (decl)
+ node->create_edge (cgraph_node::get_create (decl), call_stmt,
+ bb->count);
+ else if (gimple_call_internal_p (call_stmt))
+ ;
+ else
+ node->create_indirect_edge (call_stmt,
+ gimple_call_flags (call_stmt),
+ bb->count);
+ }
+ node->record_stmt_references (stmt);
+ }
+ for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+ node->record_stmt_references (gsi_stmt (gsi));
+ }
+ record_eh_tables (node, cfun);
+ gcc_assert (!node->inlined_to);
+ return 0;
+}
+
+/* Rebuild cgraph references for current function node. This needs to be run
+ after passes that don't update the cgraph. */
- if (is_gimple_call (stmt) && (decl = gimple_call_fndecl (stmt)))
- cgraph_create_edge (node, cgraph_node (decl), stmt,
- bb->count,
- compute_call_stmt_bb_frequency
- (current_function_decl, bb),
- bb->loop_depth);
+void
+cgraph_edge::rebuild_references (void)
+{
+ basic_block bb;
+ cgraph_node *node = cgraph_node::get (current_function_decl);
+ gimple_stmt_iterator gsi;
+ ipa_ref *ref = NULL;
+ int i;
- }
- gcc_assert (!node->global.inlined_to);
+ /* Keep speculative references for further cgraph edge expansion. */
+ for (i = 0; node->iterate_reference (i, ref);)
+ if (!ref->speculative)
+ ref->remove_reference ();
+ else
+ i++;
- return 0;
+ FOR_EACH_BB_FN (bb, cfun)
+ {
+ for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+ node->record_stmt_references (gsi_stmt (gsi));
+ for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+ node->record_stmt_references (gsi_stmt (gsi));
+ }
+ record_eh_tables (node, cfun);
}
-struct gimple_opt_pass pass_rebuild_cgraph_edges =
+namespace {
+
+const pass_data pass_data_rebuild_cgraph_edges =
{
- {
- GIMPLE_PASS,
- NULL, /* name */
- NULL, /* gate */
- rebuild_cgraph_edges, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- TV_NONE, /* tv_id */
- PROP_cfg, /* properties_required */
- 0, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- 0, /* todo_flags_finish */
- }
+ GIMPLE_PASS, /* type */
+ "*rebuild_cgraph_edges", /* name */
+ OPTGROUP_NONE, /* optinfo_flags */
+ TV_CGRAPH, /* tv_id */
+ PROP_cfg, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
};
+class pass_rebuild_cgraph_edges : public gimple_opt_pass
+{
+public:
+ pass_rebuild_cgraph_edges (gcc::context *ctxt)
+ : gimple_opt_pass (pass_data_rebuild_cgraph_edges, ctxt)
+ {}
+
+ /* opt_pass methods: */
+ opt_pass * clone () { return new pass_rebuild_cgraph_edges (m_ctxt); }
+ virtual unsigned int execute (function *)
+ {
+ return cgraph_edge::rebuild_edges ();
+ }
-static unsigned int
-remove_cgraph_callee_edges (void)
+}; // class pass_rebuild_cgraph_edges
+
+} // anon namespace
+
+gimple_opt_pass *
+make_pass_rebuild_cgraph_edges (gcc::context *ctxt)
{
- cgraph_node_remove_callees (cgraph_node (current_function_decl));
- return 0;
+ return new pass_rebuild_cgraph_edges (ctxt);
}
-struct gimple_opt_pass pass_remove_cgraph_callee_edges =
+
+namespace {
+
+const pass_data pass_data_remove_cgraph_callee_edges =
{
- {
- GIMPLE_PASS,
- NULL, /* name */
- NULL, /* gate */
- remove_cgraph_callee_edges, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- TV_NONE, /* tv_id */
- 0, /* properties_required */
- 0, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- 0, /* todo_flags_finish */
- }
+ GIMPLE_PASS, /* type */
+ "*remove_cgraph_callee_edges", /* name */
+ OPTGROUP_NONE, /* optinfo_flags */
+ TV_NONE, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
};
+
+class pass_remove_cgraph_callee_edges : public gimple_opt_pass
+{
+public:
+ pass_remove_cgraph_callee_edges (gcc::context *ctxt)
+ : gimple_opt_pass (pass_data_remove_cgraph_callee_edges, ctxt)
+ {}
+
+ /* opt_pass methods: */
+ opt_pass * clone () {
+ return new pass_remove_cgraph_callee_edges (m_ctxt);
+ }
+ virtual unsigned int execute (function *);
+
+}; // class pass_remove_cgraph_callee_edges
+
+unsigned int
+pass_remove_cgraph_callee_edges::execute (function *)
+{
+ cgraph_node *node = cgraph_node::get (current_function_decl);
+ node->remove_callees ();
+ node->remove_all_references ();
+ return 0;
+}
+
+} // anon namespace
+
+gimple_opt_pass *
+make_pass_remove_cgraph_callee_edges (gcc::context *ctxt)
+{
+ return new pass_remove_cgraph_callee_edges (ctxt);
+}
projects / thirdparty / gcc.git / blobdiff