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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/reload.h')
-rw-r--r-- | gcc-4.2.1-5666.3/gcc/reload.h | 372 |
1 files changed, 0 insertions, 372 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/reload.h b/gcc-4.2.1-5666.3/gcc/reload.h deleted file mode 100644 index 6de5e8471..000000000 --- a/gcc-4.2.1-5666.3/gcc/reload.h +++ /dev/null @@ -1,372 +0,0 @@ -/* Communication between reload.c and reload1.c. - Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1997, 1998, - 1999, 2000, 2001, 2003, 2004 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 2, 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 COPYING. If not, write to the Free -Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301, USA. */ - - -/* If secondary reloads are the same for inputs and outputs, define those - macros here. */ - -#ifdef SECONDARY_RELOAD_CLASS -#define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \ - SECONDARY_RELOAD_CLASS (CLASS, MODE, X) -#define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \ - SECONDARY_RELOAD_CLASS (CLASS, MODE, X) -#endif - -/* If MEMORY_MOVE_COST isn't defined, give it a default here. */ -#ifndef MEMORY_MOVE_COST -#define MEMORY_MOVE_COST(MODE,CLASS,IN) \ - (4 + memory_move_secondary_cost ((MODE), (CLASS), (IN))) -#endif -extern int memory_move_secondary_cost (enum machine_mode, enum reg_class, int); - -/* Maximum number of reloads we can need. */ -#define MAX_RELOADS (2 * MAX_RECOG_OPERANDS * (MAX_REGS_PER_ADDRESS + 1)) - -/* Encode the usage of a reload. The following codes are supported: - - RELOAD_FOR_INPUT reload of an input operand - RELOAD_FOR_OUTPUT likewise, for output - RELOAD_FOR_INSN a reload that must not conflict with anything - used in the insn, but may conflict with - something used before or after the insn - RELOAD_FOR_INPUT_ADDRESS reload for parts of the address of an object - that is an input reload - RELOAD_FOR_INPADDR_ADDRESS reload needed for RELOAD_FOR_INPUT_ADDRESS - RELOAD_FOR_OUTPUT_ADDRESS like RELOAD_FOR INPUT_ADDRESS, for output - RELOAD_FOR_OUTADDR_ADDRESS reload needed for RELOAD_FOR_OUTPUT_ADDRESS - RELOAD_FOR_OPERAND_ADDRESS reload for the address of a non-reloaded - operand; these don't conflict with - any other addresses. - RELOAD_FOR_OPADDR_ADDR reload needed for RELOAD_FOR_OPERAND_ADDRESS - reloads; usually secondary reloads - RELOAD_OTHER none of the above, usually multiple uses - RELOAD_FOR_OTHER_ADDRESS reload for part of the address of an input - that is marked RELOAD_OTHER. - - This used to be "enum reload_when_needed" but some debuggers have trouble - with an enum tag and variable of the same name. */ - -enum reload_type -{ - RELOAD_FOR_INPUT, RELOAD_FOR_OUTPUT, RELOAD_FOR_INSN, - RELOAD_FOR_INPUT_ADDRESS, RELOAD_FOR_INPADDR_ADDRESS, - RELOAD_FOR_OUTPUT_ADDRESS, RELOAD_FOR_OUTADDR_ADDRESS, - RELOAD_FOR_OPERAND_ADDRESS, RELOAD_FOR_OPADDR_ADDR, - RELOAD_OTHER, RELOAD_FOR_OTHER_ADDRESS -}; - -#ifdef GCC_INSN_CODES_H -/* Each reload is recorded with a structure like this. */ -struct reload -{ - /* The value to reload from */ - rtx in; - /* Where to store reload-reg afterward if nec (often the same as - reload_in) */ - rtx out; - - /* The class of registers to reload into. */ - enum reg_class class; - - /* The mode this operand should have when reloaded, on input. */ - enum machine_mode inmode; - /* The mode this operand should have when reloaded, on output. */ - enum machine_mode outmode; - - /* The mode of the reload register. */ - enum machine_mode mode; - - /* the largest number of registers this reload will require. */ - unsigned int nregs; - - /* Positive amount to increment or decrement by if - reload_in is a PRE_DEC, PRE_INC, POST_DEC, POST_INC. - Ignored otherwise (don't assume it is zero). */ - int inc; - /* A reg for which reload_in is the equivalent. - If reload_in is a symbol_ref which came from - reg_equiv_constant, then this is the pseudo - which has that symbol_ref as equivalent. */ - rtx in_reg; - rtx out_reg; - - /* Used in find_reload_regs to record the allocated register. */ - int regno; - /* This is the register to reload into. If it is zero when `find_reloads' - returns, you must find a suitable register in the class specified by - reload_reg_class, and store here an rtx for that register with mode from - reload_inmode or reload_outmode. */ - rtx reg_rtx; - /* The operand number being reloaded. This is used to group related reloads - and need not always be equal to the actual operand number in the insn, - though it current will be; for in-out operands, it is one of the two - operand numbers. */ - int opnum; - - /* Gives the reload number of a secondary input reload, when needed; - otherwise -1. */ - int secondary_in_reload; - /* Gives the reload number of a secondary output reload, when needed; - otherwise -1. */ - int secondary_out_reload; - /* If a secondary input reload is required, gives the INSN_CODE that uses the - secondary reload as a scratch register, or CODE_FOR_nothing if the - secondary reload register is to be an intermediate register. */ - enum insn_code secondary_in_icode; - /* Likewise, for a secondary output reload. */ - enum insn_code secondary_out_icode; - - /* Classifies reload as needed either for addressing an input reload, - addressing an output, for addressing a non-reloaded mem ref, or for - unspecified purposes (i.e., more than one of the above). */ - enum reload_type when_needed; - - /* Nonzero for an optional reload. Optional reloads are ignored unless the - value is already sitting in a register. */ - unsigned int optional:1; - /* nonzero if this reload shouldn't be combined with another reload. */ - unsigned int nocombine:1; - /* Nonzero if this is a secondary register for one or more reloads. */ - unsigned int secondary_p:1; - /* Nonzero if this reload must use a register not already allocated to a - group. */ - unsigned int nongroup:1; -}; - -extern struct reload rld[MAX_RELOADS]; -extern int n_reloads; -#endif - -extern GTY (()) VEC(rtx,gc) *reg_equiv_memory_loc_vec; -extern rtx *reg_equiv_constant; -extern rtx *reg_equiv_invariant; -extern rtx *reg_equiv_memory_loc; -extern rtx *reg_equiv_address; -extern rtx *reg_equiv_mem; -extern rtx *reg_equiv_alt_mem_list; - -/* Element N is the list of insns that initialized reg N from its equivalent - constant or memory slot. */ -extern GTY((length("reg_equiv_init_size"))) rtx *reg_equiv_init; - -/* The size of the previous array, for GC purposes. */ -extern GTY(()) int reg_equiv_init_size; - -/* All the "earlyclobber" operands of the current insn - are recorded here. */ -extern int n_earlyclobbers; -extern rtx reload_earlyclobbers[MAX_RECOG_OPERANDS]; - -/* Save the number of operands. */ -extern int reload_n_operands; - -/* First uid used by insns created by reload in this function. - Used in find_equiv_reg. */ -extern int reload_first_uid; - -/* Nonzero if indirect addressing is supported when the innermost MEM is - of the form (MEM (SYMBOL_REF sym)). It is assumed that the level to - which these are valid is the same as spill_indirect_levels, above. */ - -extern char indirect_symref_ok; - -/* Nonzero if an address (plus (reg frame_pointer) (reg ...)) is valid. */ -extern char double_reg_address_ok; - -extern int num_not_at_initial_offset; - -#if defined SET_HARD_REG_BIT && defined CLEAR_REG_SET -/* This structure describes instructions which are relevant for reload. - Apart from all regular insns, this also includes CODE_LABELs, since they - must be examined for register elimination. */ -struct insn_chain -{ - /* Links to the neighbor instructions. */ - struct insn_chain *next, *prev; - - /* Link through a chains set up by calculate_needs_all_insns, containing - all insns that need reloading. */ - struct insn_chain *next_need_reload; - - /* The basic block this insn is in. */ - int block; - /* The rtx of the insn. */ - rtx insn; - /* Register life information: record all live hard registers, and all - live pseudos that have a hard register. */ - regset_head live_throughout; - regset_head dead_or_set; - - /* Copies of the global variables computed by find_reloads. */ - struct reload *rld; - int n_reloads; - - /* Indicates which registers have already been used for spills. */ - HARD_REG_SET used_spill_regs; - - /* Nonzero if find_reloads said the insn requires reloading. */ - unsigned int need_reload:1; - /* Nonzero if find_reloads needs to be run during reload_as_needed to - perform modifications on any operands. */ - unsigned int need_operand_change:1; - /* Nonzero if eliminate_regs_in_insn said it requires eliminations. */ - unsigned int need_elim:1; - /* Nonzero if this insn was inserted by perform_caller_saves. */ - unsigned int is_caller_save_insn:1; -}; - -/* A chain of insn_chain structures to describe all non-note insns in - a function. */ -extern struct insn_chain *reload_insn_chain; - -/* Allocate a new insn_chain structure. */ -extern struct insn_chain *new_insn_chain (void); - -extern void compute_use_by_pseudos (HARD_REG_SET *, regset); -#endif - -/* Functions from reload.c: */ - -extern enum reg_class secondary_reload_class (bool, enum reg_class, - enum machine_mode, rtx); - -#ifdef GCC_INSN_CODES_H -extern enum reg_class scratch_reload_class (enum insn_code); -#endif - -/* Return a memory location that will be used to copy X in mode MODE. - If we haven't already made a location for this mode in this insn, - call find_reloads_address on the location being returned. */ -extern rtx get_secondary_mem (rtx, enum machine_mode, int, enum reload_type); - -/* Clear any secondary memory locations we've made. */ -extern void clear_secondary_mem (void); - -/* Transfer all replacements that used to be in reload FROM to be in - reload TO. */ -extern void transfer_replacements (int, int); - -/* IN_RTX is the value loaded by a reload that we now decided to inherit, - or a subpart of it. If we have any replacements registered for IN_RTX, - cancel the reloads that were supposed to load them. - Return nonzero if we canceled any reloads. */ -extern int remove_address_replacements (rtx in_rtx); - -/* Like rtx_equal_p except that it allows a REG and a SUBREG to match - if they are the same hard reg, and has special hacks for - autoincrement and autodecrement. */ -extern int operands_match_p (rtx, rtx); - -/* Return 1 if altering OP will not modify the value of CLOBBER. */ -extern int safe_from_earlyclobber (rtx, rtx); - -/* Search the body of INSN for values that need reloading and record them - with push_reload. REPLACE nonzero means record also where the values occur - so that subst_reloads can be used. */ -extern int find_reloads (rtx, int, int, int, short *); - -/* Compute the sum of X and Y, making canonicalizations assumed in an - address, namely: sum constant integers, surround the sum of two - constants with a CONST, put the constant as the second operand, and - group the constant on the outermost sum. */ -extern rtx form_sum (rtx, rtx); - -/* Substitute into the current INSN the registers into which we have reloaded - the things that need reloading. */ -extern void subst_reloads (rtx); - -/* Make a copy of any replacements being done into X and move those copies - to locations in Y, a copy of X. We only look at the highest level of - the RTL. */ -extern void copy_replacements (rtx, rtx); - -/* Change any replacements being done to *X to be done to *Y */ -extern void move_replacements (rtx *x, rtx *y); - -/* If LOC was scheduled to be replaced by something, return the replacement. - Otherwise, return *LOC. */ -extern rtx find_replacement (rtx *); - -/* Nonzero if modifying X will affect IN. */ -extern int reg_overlap_mentioned_for_reload_p (rtx, rtx); - -/* Check the insns before INSN to see if there is a suitable register - containing the same value as GOAL. */ -extern rtx find_equiv_reg (rtx, rtx, enum reg_class, int, short *, - int, enum machine_mode); - -/* Return 1 if register REGNO is the subject of a clobber in insn INSN. */ -extern int regno_clobbered_p (unsigned int, rtx, enum machine_mode, int); - -/* Return 1 if X is an operand of an insn that is being earlyclobbered. */ -extern int earlyclobber_operand_p (rtx); - -/* Record one reload that needs to be performed. */ -extern int push_reload (rtx, rtx, rtx *, rtx *, enum reg_class, - enum machine_mode, enum machine_mode, - int, int, int, enum reload_type); - -/* Functions in postreload.c: */ -extern void reload_cse_regs (rtx); - -/* Functions in reload1.c: */ - -/* Initialize the reload pass once per compilation. */ -extern void init_reload (void); - -/* The reload pass itself. */ -extern int reload (rtx, int); - -/* Mark the slots in regs_ever_live for the hard regs - used by pseudo-reg number REGNO. */ -extern void mark_home_live (int); - -/* Scan X and replace any eliminable registers (such as fp) with a - replacement (such as sp), plus an offset. */ -extern rtx eliminate_regs (rtx, enum machine_mode, rtx); - -/* Deallocate the reload register used by reload number R. */ -extern void deallocate_reload_reg (int r); - -/* Functions in caller-save.c: */ - -/* Initialize for caller-save. */ -extern void init_caller_save (void); - -/* Initialize save areas by showing that we haven't allocated any yet. */ -extern void init_save_areas (void); - -/* Allocate save areas for any hard registers that might need saving. */ -extern void setup_save_areas (void); - -/* Find the places where hard regs are live across calls and save them. */ -extern void save_call_clobbered_regs (void); - -/* Replace (subreg (reg)) with the appropriate (reg) for any operands. */ -extern void cleanup_subreg_operands (rtx); - -/* Debugging support. */ -extern void debug_reload_to_stream (FILE *); -extern void debug_reload (void); - -/* Compute the actual register we should reload to, in case we're - reloading to/from a register that is wider than a word. */ -extern rtx reload_adjust_reg_for_mode (rtx, enum machine_mode); |