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author | obrien <obrien@FreeBSD.org> | 2002-02-01 18:16:02 +0000 |
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committer | obrien <obrien@FreeBSD.org> | 2002-02-01 18:16:02 +0000 |
commit | c9ab9ae440a8066b2c2b85b157b1fdadcf09916a (patch) | |
tree | 086d9d6c8fbd4fc8fe4495059332f66bc0f8d12b /contrib/gcc/reload.h | |
parent | 2ecfd8bd04b63f335c1ec6295740a4bfd97a4fa6 (diff) | |
download | FreeBSD-src-c9ab9ae440a8066b2c2b85b157b1fdadcf09916a.zip FreeBSD-src-c9ab9ae440a8066b2c2b85b157b1fdadcf09916a.tar.gz |
Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0.
These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
Diffstat (limited to 'contrib/gcc/reload.h')
-rw-r--r-- | contrib/gcc/reload.h | 260 |
1 files changed, 150 insertions, 110 deletions
diff --git a/contrib/gcc/reload.h b/contrib/gcc/reload.h index 1998809..e832ed9 100644 --- a/contrib/gcc/reload.h +++ b/contrib/gcc/reload.h @@ -1,23 +1,23 @@ /* Communication between reload.c and reload1.c. - Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1997, 1998, 2000 - Free Software Foundation, Inc. + Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1997, 1998, + 1999, 2000, 2001 Free Software Foundation, Inc. -This file is part of GNU CC. +This file is part of GCC. -GNU CC 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 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. -GNU CC 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. +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 GNU CC; see the file COPYING. If not, write to -the Free Software Foundation, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ +along with GCC; see the file COPYING. If not, write to the Free +Software Foundation, 59 Temple Place - Suite 330, Boston, MA +02111-1307, USA. */ /* If secondary reloads are the same for inputs and outputs, define those @@ -44,35 +44,11 @@ Boston, MA 02111-1307, USA. */ #define MEMORY_MOVE_COST(MODE,CLASS,IN) 4 #endif #endif -extern int memory_move_secondary_cost PROTO ((enum machine_mode, enum reg_class, int)); - -/* See reload.c and reload1.c for comments on these variables. */ +extern int memory_move_secondary_cost PARAMS ((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)) -extern rtx reload_in[MAX_RELOADS]; -extern rtx reload_out[MAX_RELOADS]; -extern rtx reload_in_reg[MAX_RELOADS]; -extern rtx reload_out_reg[MAX_RELOADS]; -extern enum reg_class reload_reg_class[MAX_RELOADS]; -extern enum machine_mode reload_inmode[MAX_RELOADS]; -extern enum machine_mode reload_outmode[MAX_RELOADS]; -extern char reload_optional[MAX_RELOADS]; -extern char reload_nongroup[MAX_RELOADS]; -extern int reload_inc[MAX_RELOADS]; -extern int reload_opnum[MAX_RELOADS]; -extern int reload_secondary_p[MAX_RELOADS]; -extern int reload_secondary_in_reload[MAX_RELOADS]; -extern int reload_secondary_out_reload[MAX_RELOADS]; -#ifdef MAX_INSN_CODE -extern enum insn_code reload_secondary_in_icode[MAX_RELOADS]; -extern enum insn_code reload_secondary_out_icode[MAX_RELOADS]; -#endif -extern int n_reloads; - -extern rtx reload_reg_rtx[MAX_RELOADS]; - /* Encode the usage of a reload. The following codes are supported: RELOAD_FOR_INPUT reload of an input operand @@ -106,7 +82,87 @@ enum reload_type RELOAD_OTHER, RELOAD_FOR_OTHER_ADDRESS }; -extern enum reload_type reload_when_needed[MAX_RELOADS]; +#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 rtx *reg_equiv_constant; extern rtx *reg_equiv_memory_loc; @@ -127,7 +183,7 @@ 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. */ + which these are valid is the same as spill_indirect_levels, above. */ extern char indirect_symref_ok; @@ -136,14 +192,6 @@ extern char double_reg_address_ok; extern int num_not_at_initial_offset; -#ifdef MAX_INSN_CODE -/* These arrays record the insn_code of insns that may be needed to - perform input and output reloads of special objects. They provide a - place to pass a scratch register. */ -extern enum insn_code reload_in_optab[]; -extern enum insn_code reload_out_optab[]; -#endif - struct needs { /* [0] is normal, [1] is nongroup. */ @@ -169,32 +217,13 @@ struct insn_chain /* The rtx of the insn. */ rtx insn; /* Register life information: record all live hard registers, and all - live pseudos that have a hard register. - This information is recorded for the point immediately before the insn - (in live_before), and for the point within the insn at which all - outputs have just been written to (in live_after). */ - regset live_before; - regset live_after; - - /* For each class, size of group of consecutive regs - that is needed for the reloads of this class. */ - char group_size[N_REG_CLASSES]; - /* For each class, the machine mode which requires consecutive - groups of regs of that class. - If two different modes ever require groups of one class, - they must be the same size and equally restrictive for that class, - otherwise we can't handle the complexity. */ - enum machine_mode group_mode[N_REG_CLASSES]; - - /* Indicates if a register was counted against the need for - groups. 0 means it can count against max_nongroup instead. */ - HARD_REG_SET counted_for_groups; - - /* Indicates if a register was counted against the need for - non-groups. 0 means it can become part of a new group. - During choose_reload_regs, 1 here means don't use this reg - as part of a group, even if it seems to be otherwise ok. */ - HARD_REG_SET counted_for_nongroups; + 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; @@ -218,9 +247,9 @@ struct insn_chain extern struct insn_chain *reload_insn_chain; /* Allocate a new insn_chain structure. */ -extern struct insn_chain *new_insn_chain PROTO((void)); +extern struct insn_chain *new_insn_chain PARAMS ((void)); -extern void compute_use_by_pseudos PROTO((HARD_REG_SET *, regset)); +extern void compute_use_by_pseudos PARAMS ((HARD_REG_SET *, regset)); #endif /* Functions from reload.c: */ @@ -228,120 +257,131 @@ extern void compute_use_by_pseudos PROTO((HARD_REG_SET *, regset)); /* 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 PROTO((rtx, enum machine_mode, +extern rtx get_secondary_mem PARAMS ((rtx, enum machine_mode, int, enum reload_type)); /* Clear any secondary memory locations we've made. */ -extern void clear_secondary_mem PROTO((void)); +extern void clear_secondary_mem PARAMS ((void)); /* Transfer all replacements that used to be in reload FROM to be in reload TO. */ -extern void transfer_replacements PROTO((int, int)); +extern void transfer_replacements PARAMS ((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, chancel the reloads that were supposed to load them. Return non-zero if we chanceled any reloads. */ -extern int remove_address_replacements PROTO((rtx in_rtx)); +extern int remove_address_replacements PARAMS ((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 PROTO((rtx, rtx)); +extern int operands_match_p PARAMS ((rtx, rtx)); -/* Return 1 if altering OP will not modify the value of CLOBBER. */ -extern int safe_from_earlyclobber PROTO((rtx, rtx)); +/* Return 1 if altering OP will not modify the value of CLOBBER. */ +extern int safe_from_earlyclobber PARAMS ((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 PROTO((rtx, int, int, int, short *)); +extern int find_reloads PARAMS ((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 PROTO((rtx, rtx)); +extern rtx form_sum PARAMS ((rtx, rtx)); /* Substitute into the current INSN the registers into which we have reloaded the things that need reloading. */ -extern void subst_reloads PROTO((void)); +extern void subst_reloads PARAMS ((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 PROTO((rtx, rtx)); +extern void copy_replacements PARAMS ((rtx, rtx)); /* Change any replacements being done to *X to be done to *Y */ -extern void move_replacements PROTO((rtx *x, rtx *y)); +extern void move_replacements PARAMS ((rtx *x, rtx *y)); /* If LOC was scheduled to be replaced by something, return the replacement. Otherwise, return *LOC. */ -extern rtx find_replacement PROTO((rtx *)); +extern rtx find_replacement PARAMS ((rtx *)); /* Return nonzero if register in range [REGNO, ENDREGNO) appears either explicitly or implicitly in X other than being stored into. */ -extern int refers_to_regno_for_reload_p PROTO((int, int, rtx, rtx *)); +extern int refers_to_regno_for_reload_p PARAMS ((unsigned int, unsigned int, + rtx, rtx *)); /* Nonzero if modifying X will affect IN. */ -extern int reg_overlap_mentioned_for_reload_p PROTO((rtx, rtx)); +extern int reg_overlap_mentioned_for_reload_p PARAMS ((rtx, rtx)); /* Return nonzero if anything in X contains a MEM. Look also for pseudo registers. */ -extern int refers_to_mem_for_reload_p PROTO((rtx)); +extern int refers_to_mem_for_reload_p PARAMS ((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 PROTO((rtx, rtx, enum reg_class, int, short *, +extern rtx find_equiv_reg PARAMS ((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 PROTO((int, rtx, enum machine_mode, int)); +extern int regno_clobbered_p PARAMS ((unsigned int, rtx, enum machine_mode, + int)); -/* Functions in reload1.c: */ +/* Return 1 if X is an operand of an insn that is being earlyclobbered. */ +extern int earlyclobber_operand_p PARAMS ((rtx)); -extern int reloads_conflict PROTO ((int, int)); +/* Record one reload that needs to be performed. */ +extern int push_reload PARAMS ((rtx, rtx, rtx *, rtx *, enum reg_class, + enum machine_mode, enum machine_mode, + int, int, int, enum reload_type)); + +/* Functions in reload1.c: */ -int count_occurrences PROTO((rtx, rtx)); +extern void reload_cse_regs PARAMS ((rtx)); +extern int reloads_conflict PARAMS ((int, int)); /* Initialize the reload pass once per compilation. */ -extern void init_reload PROTO((void)); +extern void init_reload PARAMS ((void)); /* The reload pass itself. */ -extern int reload PROTO((rtx, int, FILE *)); +extern int reload PARAMS ((rtx, int)); /* Mark the slots in regs_ever_live for the hard regs used by pseudo-reg number REGNO. */ -extern void mark_home_live PROTO((int)); +extern void mark_home_live PARAMS ((int)); /* Scan X and replace any eliminable registers (such as fp) with a replacement (such as sp), plus an offset. */ -extern rtx eliminate_regs PROTO((rtx, enum machine_mode, rtx)); +extern rtx eliminate_regs PARAMS ((rtx, enum machine_mode, rtx)); /* Emit code to perform a reload from IN (which may be a reload register) to OUT (which may also be a reload register). IN or OUT is from operand OPNUM with reload type TYPE. */ -extern rtx gen_reload PROTO((rtx, rtx, int, enum reload_type)); +extern rtx gen_reload PARAMS ((rtx, rtx, int, enum reload_type)); /* Deallocate the reload register used by reload number R. */ -extern void deallocate_reload_reg PROTO((int r)); +extern void deallocate_reload_reg PARAMS ((int r)); /* Functions in caller-save.c: */ /* Initialize for caller-save. */ -extern void init_caller_save PROTO((void)); +extern void init_caller_save PARAMS ((void)); /* Initialize save areas by showing that we haven't allocated any yet. */ -extern void init_save_areas PROTO((void)); +extern void init_save_areas PARAMS ((void)); /* Allocate save areas for any hard registers that might need saving. */ -extern void setup_save_areas PROTO((void)); +extern void setup_save_areas PARAMS ((void)); /* Find the places where hard regs are live across calls and save them. */ -extern void save_call_clobbered_regs PROTO((void)); +extern void save_call_clobbered_regs PARAMS ((void)); /* Replace (subreg (reg)) with the appropriate (reg) for any operands. */ -extern void cleanup_subreg_operands PROTO ((rtx)); +extern void cleanup_subreg_operands PARAMS ((rtx)); -extern int earlyclobber_operand_p PROTO((rtx)); +/* Debugging support. */ +extern void debug_reload_to_stream PARAMS ((FILE *)); +extern void debug_reload PARAMS ((void)); |