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1.8.1.1
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GCC Middle and Back End API Reference
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Go to the source code of this file.
Data Structures | |
| struct | cselib_val_struct |
| struct | elt_loc_list |
| struct | cselib_set |
Typedefs | |
| typedef struct cselib_val_struct | cselib_val |
| typedef rtx(* | cselib_expand_callback )(rtx, bitmap, int, void *) |
Enumerations | |
| enum | cselib_record_what { CSELIB_RECORD_MEMORY = 1, CSELIB_PRESERVE_CONSTANTS = 2 } |
Variables | |
| void(* | cselib_discard_hook )(cselib_val *) |
| void(* | cselib_record_sets_hook )(rtx insn, struct cselib_set *sets, int n_sets) |
| typedef struct cselib_val_struct cselib_val |
@verbatim
Common subexpression elimination for GNU compiler. Copyright (C) 1987-2013 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/.
Describe a value.
| enum cselib_record_what |
|
inlinestatic |
Return the canonical value for VAL, following the equivalence chain towards the earliest (== lowest uid) equivalent value.
Referenced by cselib_invalidate_regno(), discard_useless_locs(), drop_overlapping_mem_locs(), and refs_newer_value_cb().
| void cselib_add_permanent_equiv | ( | cselib_val * | , |
| rtx | , | ||
| rtx | |||
| ) |
| void cselib_clear_table | ( | void | ) |
Remove all entries from the hash table. Also used during initialization.
Referenced by fp_setter_insn().
| bool cselib_dummy_expand_value_rtx_cb | ( | rtx | orig, |
| bitmap | regs_active, | ||
| int | max_depth, | ||
| cselib_expand_callback | cb, | ||
| void * | data | ||
| ) |
Similar to cselib_expand_value_rtx_cb, but no rtxs are actually copied or simplified. Useful to find out whether cselib_expand_value_rtx_cb would return NULL or non-NULL, without allocating new rtx.
References expand_value_data::callback, expand_value_data::callback_arg, and expand_value_data::regs_active.
| rtx cselib_expand_value_rtx_cb | ( | rtx | orig, |
| bitmap | regs_active, | ||
| int | max_depth, | ||
| cselib_expand_callback | cb, | ||
| void * | data | ||
| ) |
Same as cselib_expand_value_rtx, but using a callback to try to resolve some expressions. The CB function should return ORIG if it can't or does not want to deal with a certain RTX. Any other return value, including NULL, will be used as the expansion for VALUE, without any further changes.
Referenced by loc_exp_insert_dep().
| void cselib_finish | ( | void | ) |
Called when the current user is done with cselib.
Referenced by chain_to_prev_insn_p().
| unsigned int cselib_get_next_uid | ( | void | ) |
Return the number of the next value that will be generated.
Referenced by emit_notes_for_changes().
| bool cselib_have_permanent_equivalences | ( | void | ) |
Return TRUE if any permanent equivalences have been recorded since the table was last initialized.
| void cselib_init | ( | int | ) |
| void cselib_invalidate_rtx | ( | rtx | ) |
| cselib_val* cselib_lookup | ( | rtx | x, |
| enum machine_mode | mode, | ||
| int | create, | ||
| enum machine_mode | memmode | ||
| ) |
Wrapper for cselib_lookup_1, that logs the lookup result and maintains invariants related with debug insns.
??? Should we return NULL if we're not to create an entry, the
found loc is a debug loc and cselib_current_insn is not DEBUG?
If so, we should also avoid converting val to non-DEBUG; probably
easiest setting cselib_current_insn to NULL before the call
above.
Referenced by add_stores(), cselib_invalidate_regno(), cselib_reg_set_mode(), dataflow_set_destroy(), debug_ilist(), and vt_stack_adjustments().
| cselib_val* cselib_lookup_from_insn | ( | rtx | x, |
| enum machine_mode | mode, | ||
| int | create, | ||
| enum machine_mode | memmode, | ||
| rtx | insn | ||
| ) |
Wrapper for cselib_lookup, that indicates X is in INSN.
Referenced by sched_analyze_2().
| void cselib_preserve_cfa_base_value | ( | cselib_val * | , |
| unsigned | int | ||
| ) |
| void cselib_preserve_only_values | ( | void | ) |
Clean all non-constant expressions in the hash table, but retain their values.
| void cselib_preserve_value | ( | cselib_val * | ) |
| bool cselib_preserved_value_p | ( | cselib_val * | ) |
| void cselib_process_insn | ( | rtx | ) |
| enum machine_mode cselib_reg_set_mode | ( | const_rtx | ) |
| void cselib_reset_table | ( | unsigned | int | ) |
| void cselib_set_value_sp_based | ( | cselib_val * | ) |
| bool cselib_sp_based_value_p | ( | cselib_val * | ) |
| void dump_cselib_table | ( | FILE * | ) |
| bool fp_setter_insn | ( | rtx | ) |
| int references_value_p | ( | const_rtx | , |
| int | |||
| ) |
| void(* cselib_discard_hook)(cselib_val *) |
If nonnull, cselib will call this function before freeing useless VALUEs. A VALUE is deemed useless if its "locs" field is null.
Referenced by fp_setter_insn().
| void(* cselib_record_sets_hook)(rtx insn, struct cselib_set *sets, int n_sets) |
If nonnull, cselib will call this function before recording sets or even clobbering outputs of INSN. All the recorded sets will be represented in the array sets[n_sets]. new_val_min can be used to tell whether values present in sets are introduced by this instruction.
1.8.1.1