/* Scalar evolution detector. Copyright (C) 2003-2020 Free Software Foundation, Inc. Contributed by Sebastian Pop <s.pop@laposte.net> 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_TREE_SCALAR_EVOLUTION_H #define GCC_TREE_SCALAR_EVOLUTION_H extern tree number_of_latch_executions (class loop *); extern gcond *get_loop_exit_condition (const class loop *); extern void scev_initialize (void); extern bool scev_initialized_p (void); extern void scev_reset (void); extern void scev_reset_htab (void); extern void scev_finalize (void); extern tree analyze_scalar_evolution (class loop *, tree); extern tree instantiate_scev (edge, class loop *, tree); extern tree resolve_mixers (class loop *, tree, bool *); extern void gather_stats_on_scev_database (void); extern bool final_value_replacement_loop (class loop *); extern unsigned int scev_const_prop (void); extern bool expression_expensive_p (tree); extern bool simple_iv_with_niters (class loop *, class loop *, tree, struct affine_iv *, tree *, bool); extern bool simple_iv (class loop *, class loop *, tree, struct affine_iv *, bool); extern bool iv_can_overflow_p (class loop *, tree, tree, tree); extern tree compute_overall_effect_of_inner_loop (class loop *, tree); /* Returns the basic block preceding LOOP, or the CFG entry block when the loop is function's body. */ static inline basic_block block_before_loop (loop_p loop) { edge preheader = loop_preheader_edge (loop); return (preheader ? preheader->src : ENTRY_BLOCK_PTR_FOR_FN (cfun)); } /* Analyze all the parameters of the chrec that were left under a symbolic form. LOOP is the loop in which symbolic names have to be analyzed and instantiated. */ static inline tree instantiate_parameters (class loop *loop, tree chrec) { return instantiate_scev (loop_preheader_edge (loop), loop, chrec); } /* Returns the loop of the polynomial chrec CHREC. */ static inline class loop * get_chrec_loop (const_tree chrec) { return get_loop (cfun, CHREC_VARIABLE (chrec)); } #endif /* GCC_TREE_SCALAR_EVOLUTION_H */ |