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+/* Inlining decision heuristics.
+ Copyright (C) 2003-2023 Free Software Foundation, Inc.
+ Contributed by Jan Hubicka
+
+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/>. */
+
+#ifndef GCC_IPA_INLINE_H
+#define GCC_IPA_INLINE_H
+
+/* Data we cache about callgraph edges during inlining to avoid expensive
+ re-computations during the greedy algorithm. */
+class edge_growth_cache_entry
+{
+public:
+ sreal time, nonspec_time;
+ int size;
+ ipa_hints hints;
+
+ edge_growth_cache_entry()
+ : size (0), hints (0) {}
+
+ edge_growth_cache_entry(int64_t time, int64_t nonspec_time,
+ int size, ipa_hints hints)
+ : time (time), nonspec_time (nonspec_time), size (size),
+ hints (hints) {}
+};
+
+extern fast_call_summary<edge_growth_cache_entry *, va_heap> *edge_growth_cache;
+
+/* In ipa-inline-analysis.cc */
+int estimate_size_after_inlining (struct cgraph_node *, struct cgraph_edge *);
+int estimate_growth (struct cgraph_node *);
+bool growth_positive_p (struct cgraph_node *, struct cgraph_edge *, int);
+int do_estimate_edge_size (struct cgraph_edge *edge);
+sreal do_estimate_edge_time (struct cgraph_edge *edge, sreal *nonspec_time = NULL);
+ipa_hints do_estimate_edge_hints (struct cgraph_edge *edge);
+void reset_node_cache (struct cgraph_node *node);
+void initialize_growth_caches ();
+void free_growth_caches (void);
+
+/* In ipa-inline.cc */
+unsigned int early_inliner (function *fun);
+bool inline_account_function_p (struct cgraph_node *node);
+
+
+/* In ipa-inline-transform.cc */
+bool inline_call (struct cgraph_edge *, bool, vec<cgraph_edge *> *, int *, bool,
+ bool *callee_removed = NULL);
+unsigned int inline_transform (struct cgraph_node *);
+void clone_inlined_nodes (struct cgraph_edge *e, bool, bool, int *);
+
+extern int ncalls_inlined;
+extern int nfunctions_inlined;
+extern function_summary <tree *> *ipa_saved_clone_sources;
+
+/* Return estimated size of the inline sequence of EDGE. */
+
+inline int
+estimate_edge_size (struct cgraph_edge *edge)
+{
+ edge_growth_cache_entry *entry;
+ if (edge_growth_cache == NULL
+ || (entry = edge_growth_cache->get (edge)) == NULL
+ || entry->size == 0)
+ return do_estimate_edge_size (edge);
+ return entry->size - (entry->size > 0);
+}
+
+/* Return lower bound on estimated callee growth after inlining EDGE. */
+
+inline int
+estimate_min_edge_growth (struct cgraph_edge *edge)
+{
+ ipa_call_summary *s = ipa_call_summaries->get (edge);
+ struct cgraph_node *callee = edge->callee->ultimate_alias_target ();
+ return (ipa_fn_summaries->get (callee)->min_size - s->call_stmt_size);
+}
+
+/* Return estimated callee growth after inlining EDGE. */
+
+inline int
+estimate_edge_growth (struct cgraph_edge *edge)
+{
+ ipa_call_summary *s = ipa_call_summaries->get (edge);
+ gcc_checking_assert (s->call_stmt_size || !edge->callee->analyzed);
+ return (estimate_edge_size (edge) - s->call_stmt_size);
+}
+
+/* Return estimated callee runtime increase after inlining
+ EDGE. */
+
+inline sreal
+estimate_edge_time (struct cgraph_edge *edge, sreal *nonspec_time = NULL)
+{
+ edge_growth_cache_entry *entry;
+ if (edge_growth_cache == NULL
+ || (entry = edge_growth_cache->get (edge)) == NULL
+ || entry->time == 0)
+ return do_estimate_edge_time (edge, nonspec_time);
+ if (nonspec_time)
+ *nonspec_time = edge_growth_cache->get (edge)->nonspec_time;
+ return entry->time;
+}
+
+
+/* Return estimated callee runtime increase after inlining
+ EDGE. */
+
+inline ipa_hints
+estimate_edge_hints (struct cgraph_edge *edge)
+{
+ edge_growth_cache_entry *entry;
+ if (edge_growth_cache == NULL
+ || (entry = edge_growth_cache->get (edge)) == NULL
+ || entry->hints == 0)
+ return do_estimate_edge_hints (edge);
+ return entry->hints - 1;
+}
+
+#endif /* GCC_IPA_INLINE_H */