--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/analyzer/analysis-plan.cc	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,134 @@
+/* A class to encapsulate decisions about how the analysis should happen.
+   Copyright (C) 2019-2020 Free Software Foundation, Inc.
+   Contributed by David Malcolm <dmalcolm@redhat.com>.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tree.h"
+#include "options.h"
+#include "cgraph.h"
+#include "timevar.h"
+#include "ipa-utils.h"
+#include "function.h"
+#include "analyzer/analyzer.h"
+#include "diagnostic-core.h"
+#include "analyzer/analyzer-logging.h"
+#include "analyzer/analysis-plan.h"
+#include "ordered-hash-map.h"
+#include "options.h"
+#include "cgraph.h"
+#include "function.h"
+#include "cfg.h"
+#include "basic-block.h"
+#include "gimple.h"
+#include "gimple-iterator.h"
+#include "digraph.h"
+#include "analyzer/supergraph.h"
+
+#if ENABLE_ANALYZER
+
+/* class analysis_plan.  */
+
+/* analysis_plan's ctor.  */
+
+analysis_plan::analysis_plan (const supergraph &sg, logger *logger)
+: log_user (logger), m_sg (sg),
+  m_cgraph_node_postorder (XCNEWVEC (struct cgraph_node *,
+				     symtab->cgraph_count)),
+  m_index_by_uid (symtab->cgraph_max_uid)
+{
+  LOG_SCOPE (logger);
+  auto_timevar time (TV_ANALYZER_PLAN);
+
+  m_num_cgraph_nodes = ipa_reverse_postorder (m_cgraph_node_postorder);
+  gcc_assert (m_num_cgraph_nodes == symtab->cgraph_count);
+  if (get_logger_file ())
+    ipa_print_order (get_logger_file (),
+		     "analysis_plan", m_cgraph_node_postorder,
+		     m_num_cgraph_nodes);
+
+  /* Populate m_index_by_uid.  */
+  for (int i = 0; i < symtab->cgraph_max_uid; i++)
+    m_index_by_uid.quick_push (-1);
+  for (int i = 0; i < m_num_cgraph_nodes; i++)
+    {
+      gcc_assert (m_cgraph_node_postorder[i]->get_uid ()
+		  < symtab->cgraph_max_uid);
+      m_index_by_uid[m_cgraph_node_postorder[i]->get_uid ()] = i;
+    }
+}
+
+/* analysis_plan's dtor.  */
+
+analysis_plan::~analysis_plan ()
+{
+  free (m_cgraph_node_postorder);
+}
+
+/* Comparator for use by the exploded_graph's worklist, to order FUN_A
+   and FUN_B so that functions that are to be summarized are visited
+   before the summary is needed (based on a sort of the callgraph).  */
+
+int
+analysis_plan::cmp_function (function *fun_a, function *fun_b) const
+{
+  cgraph_node *node_a = cgraph_node::get (fun_a->decl);
+  cgraph_node *node_b = cgraph_node::get (fun_b->decl);
+
+  int idx_a = m_index_by_uid[node_a->get_uid ()];
+  int idx_b = m_index_by_uid[node_b->get_uid ()];
+
+  return idx_b - idx_a;
+}
+
+/* Return true if the call EDGE should be analyzed using a call summary.
+   Return false if it should be analyzed using a full call and return.  */
+
+bool
+analysis_plan::use_summary_p (const cgraph_edge *edge) const
+{
+  /* Don't use call summaries if -fno-analyzer-call-summaries.  */
+  if (!flag_analyzer_call_summaries)
+    return false;
+
+  /* TODO: don't count callsites each time.  */
+  int num_call_sites = 0;
+  const cgraph_node *callee = edge->callee;
+  for (cgraph_edge *edge = callee->callers; edge; edge = edge->next_caller)
+    ++num_call_sites;
+
+  /* Don't use a call summary if there's only one call site.  */
+  if (num_call_sites <= 1)
+    return false;
+
+  /* Require the callee to be sufficiently complex to be worth
+     summarizing.  */
+  const function *fun
+    = const_cast <cgraph_node *> (callee)->ultimate_alias_target ()->get_fun ();
+  /* TODO(stage1): can ultimate_alias_target be made const?  */
+
+  if ((int)m_sg.get_num_snodes (fun)
+      < param_analyzer_min_snodes_for_call_summary)
+    return false;
+
+  return true;
+}
+
+#endif /* #if ENABLE_ANALYZER */