X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Ftree-chrec.h;h=fcff93a55da9b2edad91d3242815649c8f303c61;hb=2758156998e0930f6123e2384c6dcc35bbc9f502;hp=e6bea92eb3b59e5730a103628c8d18e5facbefc5;hpb=0de36bdb2d7fa28a41b67b7ab3f8ccb92e1d2e03;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/tree-chrec.h b/gcc/tree-chrec.h index e6bea92eb3b..fcff93a55da 100644 --- a/gcc/tree-chrec.h +++ b/gcc/tree-chrec.h @@ -1,12 +1,13 @@ /* Chains of recurrences. - Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc. + Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 + Free Software Foundation, Inc. Contributed by Sebastian Pop 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 2, or (at your option) any later +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 @@ -15,15 +16,14 @@ 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 COPYING. If not, write to the Free -Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301, USA. */ +along with GCC; see the file COPYING3. If not see +. */ #ifndef GCC_TREE_CHREC_H #define GCC_TREE_CHREC_H -/* The following trees are unique elements. Thus the comparison of another - element to these elements should be done on the pointer to these trees, +/* The following trees are unique elements. Thus the comparison of another + element to these elements should be done on the pointer to these trees, and not on their value. */ extern tree chrec_not_analyzed_yet; @@ -34,7 +34,7 @@ extern GTY(()) tree chrec_known; include it in the following function. */ static inline bool -automatically_generated_chrec_p (tree chrec) +automatically_generated_chrec_p (const_tree chrec) { return (chrec == chrec_dont_know || chrec == chrec_known); @@ -43,7 +43,7 @@ automatically_generated_chrec_p (tree chrec) /* The tree nodes aka. CHRECs. */ static inline bool -tree_is_chrec (tree expr) +tree_is_chrec (const_tree expr) { if (TREE_CODE (expr) == POLYNOMIAL_CHREC || automatically_generated_chrec_p (expr)) @@ -58,8 +58,8 @@ tree_is_chrec (tree expr) extern tree chrec_fold_plus (tree, tree, tree); extern tree chrec_fold_minus (tree, tree, tree); extern tree chrec_fold_multiply (tree, tree, tree); -extern tree chrec_convert (tree, tree, tree); -extern tree chrec_convert_rhs (tree, tree, tree); +extern tree chrec_convert (tree, tree, gimple); +extern tree chrec_convert_rhs (tree, tree, gimple); extern tree chrec_convert_aggressive (tree, tree); /* Operations. */ @@ -71,44 +71,78 @@ extern tree evolution_part_in_loop_num (tree, unsigned); extern tree hide_evolution_in_other_loops_than_loop (tree, unsigned); extern tree reset_evolution_in_loop (unsigned, tree, tree); extern tree chrec_merge (tree, tree); +extern void for_each_scev_op (tree *, bool (*) (tree *, void *), void *); /* Observers. */ -extern bool eq_evolutions_p (tree, tree); -extern bool is_multivariate_chrec (tree); +extern bool eq_evolutions_p (const_tree, const_tree); +extern bool is_multivariate_chrec (const_tree); extern bool chrec_is_positive (tree, bool *); -extern bool chrec_contains_symbols (tree); -extern bool chrec_contains_symbols_defined_in_loop (tree, unsigned); -extern bool chrec_contains_undetermined (tree); -extern bool tree_contains_chrecs (tree, int *); -extern bool evolution_function_is_affine_multivariate_p (tree, int); -extern bool evolution_function_is_univariate_p (tree); +extern bool chrec_contains_symbols (const_tree); +extern bool chrec_contains_symbols_defined_in_loop (const_tree, unsigned); +extern bool chrec_contains_undetermined (const_tree); +extern bool tree_contains_chrecs (const_tree, int *); +extern bool evolution_function_is_affine_multivariate_p (const_tree, int); +extern bool evolution_function_is_univariate_p (const_tree); extern unsigned nb_vars_in_chrec (tree); +extern bool evolution_function_is_invariant_p (tree, int); +extern bool scev_is_linear_expression (tree); +extern bool evolution_function_right_is_integer_cst (const_tree); /* Determines whether CHREC is equal to zero. */ -static inline bool -chrec_zerop (tree chrec) +static inline bool +chrec_zerop (const_tree chrec) { if (chrec == NULL_TREE) return false; - + if (TREE_CODE (chrec) == INTEGER_CST) return integer_zerop (chrec); - + return false; } +/* Determines whether CHREC is a loop invariant with respect to LOOP_NUM. + Set the result in RES and return true when the property can be computed. */ + +static inline bool +no_evolution_in_loop_p (tree chrec, unsigned loop_num, bool *res) +{ + tree scev; + + if (chrec == chrec_not_analyzed_yet + || chrec == chrec_dont_know + || chrec_contains_symbols_defined_in_loop (chrec, loop_num)) + return false; + + STRIP_NOPS (chrec); + scev = hide_evolution_in_other_loops_than_loop (chrec, loop_num); + *res = !tree_is_chrec (scev); + return true; +} + /* Build a polynomial chain of recurrence. */ -static inline tree -build_polynomial_chrec (unsigned loop_num, - tree left, +static inline tree +build_polynomial_chrec (unsigned loop_num, + tree left, tree right) { + bool val; + if (left == chrec_dont_know || right == chrec_dont_know) return chrec_dont_know; + if (!no_evolution_in_loop_p (left, loop_num, &val) + || !val) + return chrec_dont_know; + + /* Pointer types should occur only on the left hand side, i.e. in + the base of the chrec, and not in the step. */ + gcc_assert (!POINTER_TYPE_P (TREE_TYPE (right))); + + /* Types of left and right sides of a chrec should be compatible. */ if (POINTER_TYPE_P (TREE_TYPE (left))) gcc_assert (sizetype == TREE_TYPE (right)); else @@ -117,14 +151,14 @@ build_polynomial_chrec (unsigned loop_num, if (chrec_zerop (right)) return left; - return build3 (POLYNOMIAL_CHREC, TREE_TYPE (left), + return build3 (POLYNOMIAL_CHREC, TREE_TYPE (left), build_int_cst (NULL_TREE, loop_num), left, right); } /* Determines whether the expression CHREC is a constant. */ -static inline bool -evolution_function_is_constant_p (tree chrec) +static inline bool +evolution_function_is_constant_p (const_tree chrec) { if (chrec == NULL_TREE) return false; @@ -134,77 +168,70 @@ evolution_function_is_constant_p (tree chrec) case INTEGER_CST: case REAL_CST: return true; - + default: return false; } } -extern bool evolution_function_is_invariant_p (tree, int); -/* Determine whether the given tree is an affine evolution function or not. */ +/* Determine whether CHREC is an affine evolution function in LOOPNUM. */ -static inline bool -evolution_function_is_affine_p (tree chrec) +static inline bool +evolution_function_is_affine_in_loop (const_tree chrec, int loopnum) { if (chrec == NULL_TREE) return false; - + switch (TREE_CODE (chrec)) { case POLYNOMIAL_CHREC: - if (evolution_function_is_invariant_p (CHREC_LEFT (chrec), - CHREC_VARIABLE (chrec)) - && evolution_function_is_invariant_p (CHREC_RIGHT (chrec), - CHREC_VARIABLE (chrec))) + if (evolution_function_is_invariant_p (CHREC_LEFT (chrec), loopnum) + && evolution_function_is_invariant_p (CHREC_RIGHT (chrec), loopnum)) return true; else return false; - + default: return false; } } -/* Determine whether the given tree is an affine or constant evolution - function. */ +/* Determine whether CHREC is an affine evolution function or not. */ -static inline bool -evolution_function_is_affine_or_constant_p (tree chrec) +static inline bool +evolution_function_is_affine_p (const_tree chrec) { - return evolution_function_is_affine_p (chrec) - || evolution_function_is_constant_p (chrec); -} + if (chrec == NULL_TREE) + return false; -/* Determines whether EXPR does not contains chrec expressions. */ + switch (TREE_CODE (chrec)) + { + case POLYNOMIAL_CHREC: + if (evolution_function_is_invariant_p (CHREC_LEFT (chrec), + CHREC_VARIABLE (chrec)) + && evolution_function_is_invariant_p (CHREC_RIGHT (chrec), + CHREC_VARIABLE (chrec))) + return true; + else + return false; -static inline bool -tree_does_not_contain_chrecs (tree expr) -{ - return !tree_contains_chrecs (expr, NULL); + default: + return false; + } } -/* Determines whether CHREC is a loop invariant with respect to LOOP_NUM. - Set the result in RES and return true when the property can be computed. */ +/* Determines whether EXPR does not contains chrec expressions. */ static inline bool -no_evolution_in_loop_p (tree chrec, unsigned loop_num, bool *res) +tree_does_not_contain_chrecs (const_tree expr) { - tree scev; - - if (chrec == chrec_not_analyzed_yet - || chrec == chrec_dont_know - || chrec_contains_symbols_defined_in_loop (chrec, loop_num)) - return false; - - scev = hide_evolution_in_other_loops_than_loop (chrec, loop_num); - *res = !tree_is_chrec (scev); - return true; + return !tree_contains_chrecs (expr, NULL); } /* Returns the type of the chrec. */ static inline tree -chrec_type (tree chrec) +chrec_type (const_tree chrec) { if (automatically_generated_chrec_p (chrec)) return NULL_TREE; @@ -212,5 +239,24 @@ chrec_type (tree chrec) return TREE_TYPE (chrec); } +static inline tree +chrec_fold_op (enum tree_code code, tree type, tree op0, tree op1) +{ + switch (code) + { + case PLUS_EXPR: + return chrec_fold_plus (type, op0, op1); + + case MINUS_EXPR: + return chrec_fold_minus (type, op0, op1); + + case MULT_EXPR: + return chrec_fold_multiply (type, op0, op1); + + default: + gcc_unreachable (); + } + +} #endif /* GCC_TREE_CHREC_H */