X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Ftree-chrec.h;h=e84ecd76b0ca6c6674cc70c95b8cd57c31e27b76;hb=baa1a726769f43b667c12aec666b583a24ab8282;hp=6be00d63165271a8b9e70b096f13aba11be0f4d8;hpb=c4e91ab356ee50247b2bf04ec791a01a5b2ad2c1;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/tree-chrec.h b/gcc/tree-chrec.h index 6be00d63165..e84ecd76b0c 100644 --- a/gcc/tree-chrec.h +++ b/gcc/tree-chrec.h @@ -1,12 +1,12 @@ /* Chains of recurrences. - Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc. + Copyright (C) 2003, 2004, 2005, 2006, 2007 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 @@ -15,9 +15,8 @@ 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 @@ -34,7 +33,7 @@ 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 +42,7 @@ 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)) @@ -59,6 +58,7 @@ 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_aggressive (tree, tree); /* Operations. */ @@ -72,21 +72,22 @@ extern tree reset_evolution_in_loop (unsigned, tree, tree); extern tree chrec_merge (tree, tree); /* 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); -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); /* Determines whether CHREC is equal to zero. */ static inline bool -chrec_zerop (tree chrec) +chrec_zerop (const_tree chrec) { if (chrec == NULL_TREE) return false; @@ -97,6 +98,24 @@ chrec_zerop (tree 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; + + 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 @@ -104,11 +123,19 @@ 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; - gcc_assert (TREE_TYPE (left) == TREE_TYPE (right)); + if (no_evolution_in_loop_p (left, loop_num, &val) && !val) + return chrec_dont_know; + + if (POINTER_TYPE_P (TREE_TYPE (left))) + gcc_assert (sizetype == TREE_TYPE (right)); + else + gcc_assert (TREE_TYPE (left) == TREE_TYPE (right)); if (chrec_zerop (right)) return left; @@ -120,7 +147,7 @@ build_polynomial_chrec (unsigned loop_num, /* Determines whether the expression CHREC is a constant. */ static inline bool -evolution_function_is_constant_p (tree chrec) +evolution_function_is_constant_p (const_tree chrec) { if (chrec == NULL_TREE) return false; @@ -136,11 +163,10 @@ evolution_function_is_constant_p (tree chrec) } } -extern bool evolution_function_is_invariant_p (tree, int); /* Determine whether the given tree is an affine evolution function or not. */ static inline bool -evolution_function_is_affine_p (tree chrec) +evolution_function_is_affine_p (const_tree chrec) { if (chrec == NULL_TREE) return false; @@ -165,7 +191,7 @@ evolution_function_is_affine_p (tree chrec) function. */ static inline bool -evolution_function_is_affine_or_constant_p (tree chrec) +evolution_function_is_affine_or_constant_p (const_tree chrec) { return evolution_function_is_affine_p (chrec) || evolution_function_is_constant_p (chrec); @@ -174,33 +200,15 @@ evolution_function_is_affine_or_constant_p (tree chrec) /* Determines whether EXPR does not contains chrec expressions. */ static inline bool -tree_does_not_contain_chrecs (tree expr) +tree_does_not_contain_chrecs (const_tree expr) { return !tree_contains_chrecs (expr, NULL); } -/* 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; - - scev = hide_evolution_in_other_loops_than_loop (chrec, loop_num); - *res = !tree_is_chrec (scev); - return true; -} - /* 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;