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Data Structures | |
| class | aff_comb_elt |
| class | aff_tree |
Macros | |
| #define | MAX_AFF_ELTS 8 |
Macro Definition Documentation
◆ MAX_AFF_ELTS
| #define MAX_AFF_ELTS 8 |
Operations with affine combinations of trees. Copyright (C) 2005-2024 Free Software Foundation, Inc. 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/>.
Affine combination of trees. We keep track of at most MAX_AFF_ELTS elements to make things simpler; this is sufficient in most cases.
Referenced by aff_combination_add_elt(), aff_combination_convert(), aff_combination_scale(), aff_combination_to_tree(), and aff_combination_zero().
Function Documentation
◆ aff_comb_cannot_overlap_p()
| bool aff_comb_cannot_overlap_p | ( | aff_tree * | diff, |
| const poly_widest_int & | size1, | ||
| const poly_widest_int & | size2 ) |
Returns true if a region of size SIZE1 at position 0 and a region of size SIZE2 at position DIFF cannot overlap.
References known_le.
Referenced by dr_may_alias_p(), generate_memcpy_builtin(), and mem_refs_may_alias_p().
◆ aff_combination_add()
Adds COMB2 to COMB1.
References aff_combination_add_cst(), aff_combination_add_elt(), aff_comb_elt::coef, aff_tree::elts, i, aff_tree::n, aff_tree::offset, aff_tree::rest, and aff_comb_elt::val.
Referenced by pcom_worker::aff_combination_dr_offset(), aff_combination_expand(), cand_value_at(), pcom_worker::determine_offset(), difference_cannot_overflow_p(), dr_may_alias_p(), expr_to_aff_combination(), generate_memcpy_builtin(), get_computation_aff(), get_computation_aff_1(), get_inner_reference_aff(), iv_elimination_compare_lt(), mem_refs_may_alias_p(), simplify_peeled_chrec(), tree_to_aff_combination(), and pcom_worker::valid_initializer_p().
◆ aff_combination_add_elt()
| void aff_combination_add_elt | ( | aff_tree * | comb, |
| tree | elt, | ||
| const widest_int & | scale_in ) |
Adds ELT * SCALE to COMB.
References aff_comb_elt::coef, aff_tree::elts, fold_build2, fold_convert, gcc_assert, i, MAX_AFF_ELTS, aff_tree::n, NULL_TREE, operand_equal_p(), POINTER_TYPE_P, aff_tree::rest, sizetype, aff_tree::type, type(), aff_comb_elt::val, wide_int_ext_for_comb(), and wide_int_to_tree().
Referenced by aff_combination_add(), aff_combination_add_product(), aff_combination_expand(), get_address_cost(), and tree_to_aff_combination().
◆ aff_combination_const()
| void aff_combination_const | ( | aff_tree * | comb, |
| tree | type, | ||
| const poly_widest_int & | cst ) |
Sets COMB to CST.
References aff_combination_zero(), aff_tree::offset, aff_tree::type, and wide_int_ext_for_comb().
Referenced by pcom_worker::aff_combination_dr_offset(), get_inner_reference_aff(), and tree_to_aff_combination().
◆ aff_combination_const_p()
Return true if AFF is actually const.
References aff_tree::n, and NULL.
Referenced by get_address_cost(), and get_computation_cost().
◆ aff_combination_constant_multiple_p()
| bool aff_combination_constant_multiple_p | ( | aff_tree * | val, |
| aff_tree * | div, | ||
| poly_widest_int * | mult ) |
Returns true if VAL = X * DIV for some constant X. If this is the case, X is stored to MULT.
References aff_combination_find_elt(), aff_comb_elt::coef, aff_tree::elts, gcc_assert, i, known_eq, aff_tree::n, NULL, aff_tree::offset, aff_tree::rest, aff_comb_elt::val, and wide_int_constant_multiple_p().
Referenced by constant_multiple_of(), pcom_worker::determine_offset(), and pcom_worker::valid_initializer_p().
◆ aff_combination_convert()
Converts affine combination COMB to TYPE.
References aff_combination_to_tree(), aff_comb_elt::coef, aff_tree::elts, fold_convert, i, MAX_AFF_ELTS, aff_tree::n, NULL_TREE, aff_tree::offset, POINTER_TYPE_P, aff_tree::rest, tree_to_aff_combination(), aff_tree::type, type(), TYPE_PRECISION, aff_comb_elt::val, and wide_int_ext_for_comb().
Referenced by aff_combination_expand(), cand_value_at(), get_computation_aff_1(), get_computation_cost(), and tree_to_aff_combination().
◆ aff_combination_elt()
Sets COMB to single element ELT.
References aff_combination_zero(), aff_comb_elt::coef, aff_tree::elts, aff_tree::n, and aff_comb_elt::val.
Referenced by aff_combination_expand(), and tree_to_aff_combination().
◆ aff_combination_expand()
| void aff_combination_expand | ( | aff_tree * | comb, |
| hash_map< tree, name_expansion * > ** | cache ) |
Expands SSA names in COMB recursively. CACHE is used to cache the results.
References aff_combination_add(), aff_combination_add_elt(), aff_combination_convert(), aff_combination_elt(), aff_combination_expand(), aff_combination_scale(), aff_combination_zero(), cache, CASE_CONVERT, CONVERT_EXPR_P, exp(), expr_to_aff_combination(), fold_convert, gcc_assert, get_gimple_rhs_class(), gimple_assign_lhs(), gimple_assign_rhs1(), gimple_assign_rhs2(), gimple_assign_rhs_code(), GIMPLE_SINGLE_RHS, i, IS_EXPR_CODE_CLASS, is_gimple_assign(), is_gimple_min_invariant(), NULL, hash_map< KeyId, Value, Traits >::put(), SSA_NAME_DEF_STMT, tcc_reference, TREE_CODE, TREE_CODE_CLASS, TREE_OPERAND, tree_to_aff_combination(), TREE_TYPE, aff_tree::type, type(), TYPE_PRECISION, and useless_type_conversion_p().
Referenced by aff_combination_expand(), mem_refs_may_alias_p(), and tree_to_aff_combination_expand().
◆ aff_combination_mult()
Multiplies C1 by C2, storing the result to R
References aff_combination_add_product(), aff_combination_zero(), aff_comb_elt::coef, poly_int< N, C >::coeffs, aff_tree::elts, gcc_assert, i, poly_int< N, C >::is_constant(), aff_tree::n, NULL, aff_tree::offset, offset, r, aff_tree::rest, aff_tree::type, TYPE_PRECISION, aff_comb_elt::val, and wide_int_to_tree().
Referenced by cand_value_at().
◆ aff_combination_remove_elt()
| void aff_combination_remove_elt | ( | aff_tree * | comb, |
| unsigned | m ) |
Remove M-th element from COMB.
References aff_comb_elt::coef, aff_tree::elts, aff_tree::n, NULL_TREE, aff_tree::rest, and aff_comb_elt::val.
Referenced by move_fixed_address_to_symbol(), move_hint_to_base(), move_pointer_to_base(), and move_variant_to_index().
◆ aff_combination_scale()
| void aff_combination_scale | ( | aff_tree * | comb, |
| const widest_int & | scale_in ) |
Scales COMB by SCALE.
References aff_combination_zero(), aff_comb_elt::coef, aff_tree::elts, fold_build2, i, MAX_AFF_ELTS, aff_tree::n, NULL_TREE, aff_tree::offset, POINTER_TYPE_P, aff_tree::rest, sizetype, aff_tree::type, aff_comb_elt::val, wide_int_ext_for_comb(), and wide_int_to_tree().
Referenced by aff_combination_expand(), pcom_worker::determine_offset(), difference_cannot_overflow_p(), dr_may_alias_p(), expr_to_aff_combination(), generate_memcpy_builtin(), get_computation_aff_1(), iv_elimination_compare_lt(), mem_refs_may_alias_p(), simplify_peeled_chrec(), and pcom_worker::valid_initializer_p().
◆ aff_combination_singleton_var_p()
Return true iff AFF contains one (negated) singleton variable. Users need to make sure AFF points to a valid combination.
References aff_comb_elt::coef, aff_tree::elts, known_eq, aff_tree::n, and aff_tree::offset.
Referenced by get_address_cost(), and get_computation_cost().
◆ aff_combination_to_tree()
Makes tree from the affine combination COMB.
References add_elt_to_tree(), aff_comb_elt::coef, aff_tree::elts, fold_build_pointer_plus, fold_convert, gcc_assert, i, known_lt, MAX_AFF_ELTS, aff_tree::n, NULL_TREE, aff_tree::offset, POINTER_TYPE_P, aff_tree::rest, sizetype, TREE_TYPE, aff_tree::type, aff_comb_elt::val, and wide_int_to_tree().
Referenced by aff_combination_convert(), alloc_iv(), get_address_cost(), get_alternative_base(), get_computation_at(), get_computation_cost(), may_eliminate_iv(), and rewrite_use_nonlinear_expr().
◆ aff_combination_type()
◆ aff_combination_zero_p()
Return true if AFF is actually ZERO.
References known_eq, aff_tree::n, and aff_tree::offset.
Referenced by difference_cannot_overflow_p(), get_address_cost(), get_computation_cost(), and simplify_peeled_chrec().
◆ debug_aff()
| void debug_aff | ( | aff_tree * | val | ) |
Debugging functions.
Prints the affine VAL to the standard error, used for debugging.
References print_aff(), and aff_comb_elt::val.
◆ free_affine_expand_cache()
| void free_affine_expand_cache | ( | hash_map< tree, name_expansion * > ** | cache | ) |
Frees memory allocated for the CACHE used by tree_to_aff_combination_expand.
References cache, free_name_expansion(), and NULL.
Referenced by simplify_peeled_chrec(), tree_ssa_iv_optimize_finalize(), tree_ssa_lim_finalize(), and pcom_worker::~pcom_worker().
◆ get_inner_reference_aff()
| tree get_inner_reference_aff | ( | tree | ref, |
| aff_tree * | addr, | ||
| poly_widest_int * | size ) |
Computes address of the reference REF in ADDR. The size of the accessed location is stored to SIZE. Returns the ultimate containing object to which REF refers.
References aff_combination_add(), aff_combination_const(), bits_to_bytes_round_down, bits_to_bytes_round_up, build_fold_addr_expr, get_inner_reference(), sizetype, and tree_to_aff_combination().
Referenced by dr_may_alias_p(), and mem_refs_may_alias_p().
◆ tree_to_aff_combination()
Splits EXPR into an affine combination of parts.
References aff_combination_add(), aff_combination_add_cst(), aff_combination_add_elt(), aff_combination_const(), aff_combination_convert(), aff_combination_elt(), build_fold_addr_expr, CASE_CONVERT, expr_to_aff_combination(), get_inner_reference(), poly_int_tree_p(), sizetype, STRIP_NOPS, wi::to_poly_widest(), TREE_CODE, TREE_OPERAND, tree_to_aff_combination(), and TREE_TYPE.
Referenced by aff_combination_convert(), aff_combination_expand(), alloc_iv(), cand_value_at(), constant_multiple_of(), expr_to_aff_combination(), generate_memcpy_builtin(), get_computation_aff_1(), get_inner_reference_aff(), iv_elimination_compare_lt(), tree_to_aff_combination(), and tree_to_aff_combination_expand().
◆ tree_to_aff_combination_expand()
| void tree_to_aff_combination_expand | ( | tree | expr, |
| tree | type, | ||
| aff_tree * | comb, | ||
| hash_map< tree, name_expansion * > ** | cache ) |
Similar to tree_to_aff_combination, but follows SSA name definitions and expands them recursively. CACHE is used to cache the expansions of the ssa names, to avoid exponential time complexity for cases like a1 = a0 + a0; a2 = a1 + a1; a3 = a2 + a2; ...
References aff_combination_expand(), cache, and tree_to_aff_combination().
Referenced by pcom_worker::aff_combination_dr_offset(), pcom_worker::determine_offset(), difference_cannot_overflow_p(), get_alternative_base(), simplify_peeled_chrec(), and pcom_worker::valid_initializer_p().
◆ unshare_aff_combination()
| void unshare_aff_combination | ( | aff_tree * | comb | ) |
Copies the tree elements of COMB to ensure that they are not shared.
References aff_tree::elts, i, aff_tree::n, aff_tree::rest, unshare_expr(), and aff_comb_elt::val.
Referenced by get_computation_at(), rewrite_use_address(), and rewrite_use_nonlinear_expr().
