projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 6dce4937 C |
1 | /* Communication between reload.c and reload1.c. |
| 2 | Copyright (C) 1987, 1991 Free Software Foundation, Inc. | |
| 3 | ||
| 4 | This file is part of GNU CC. | |
| 5 | ||
| 6 | GNU CC is free software; you can redistribute it and/or modify | |
| 7 | it under the terms of the GNU General Public License as published by | |
| 8 | the Free Software Foundation; either version 2, or (at your option) | |
| 9 | any later version. | |
| 10 | ||
| 11 | GNU CC is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 14 | GNU General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU General Public License | |
| 17 | along with GNU CC; see the file COPYING. If not, write to | |
| 18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
| 19 | ||
| 20 | ||
| 21 | /* If secondary reloads are the same for inputs and outputs, define those | |
| 22 | macros here. */ | |
| 23 | ||
| 24 | #ifdef SECONDARY_RELOAD_CLASS | |
| 25 | #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \ | |
| 26 | SECONDARY_RELOAD_CLASS (CLASS, MODE, X) | |
| 27 | #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \ | |
| 28 | SECONDARY_RELOAD_CLASS (CLASS, MODE, X) | |
| 29 | #endif | |
| 30 | ||
| 31 | /* If either macro is defined, show that we need secondary reloads. */ | |
| 32 | #if defined(SECONDARY_INPUT_RELOAD_CLASS) || defined(SECONDARY_OUTPUT_RELOAD_CLASS) | |
| 33 | #define HAVE_SECONDARY_RELOADS | |
| 34 | #endif | |
| 35 | ||
| 36 | /* See reload.c and reload1.c for comments on these variables. */ | |
| 37 | ||
| 38 | /* Maximum number of reloads we can need. */ | |
| 39 | #define MAX_RELOADS (2 * MAX_RECOG_OPERANDS * (MAX_REGS_PER_ADDRESS + 1)) | |
| 40 | ||
| 41 | extern rtx reload_in[MAX_RELOADS]; | |
| 42 | extern rtx reload_out[MAX_RELOADS]; | |
| 43 | extern rtx reload_in_reg[MAX_RELOADS]; | |
| 44 | extern enum reg_class reload_reg_class[MAX_RELOADS]; | |
| 45 | extern enum machine_mode reload_inmode[MAX_RELOADS]; | |
| 46 | extern enum machine_mode reload_outmode[MAX_RELOADS]; | |
| 47 | extern char reload_strict_low[MAX_RELOADS]; | |
| 48 | extern char reload_optional[MAX_RELOADS]; | |
| 49 | extern int reload_inc[MAX_RELOADS]; | |
| 50 | extern int reload_needed_for_multiple[MAX_RELOADS]; | |
| 51 | extern rtx reload_needed_for[MAX_RELOADS]; | |
| 52 | extern int reload_secondary_reload[MAX_RELOADS]; | |
| 53 | extern int reload_secondary_p[MAX_RELOADS]; | |
| 54 | #ifdef MAX_INSN_CODE | |
| 55 | extern enum insn_code reload_secondary_icode[MAX_RELOADS]; | |
| 56 | #endif | |
| 57 | extern int n_reloads; | |
| 58 | ||
| 59 | extern rtx reload_reg_rtx[MAX_RELOADS]; | |
| 60 | ||
| 61 | enum reload_when_needed | |
| 62 | { | |
| 63 | RELOAD_FOR_INPUT_RELOAD_ADDRESS, | |
| 64 | RELOAD_FOR_OUTPUT_RELOAD_ADDRESS, | |
| 65 | RELOAD_FOR_OPERAND_ADDRESS, | |
| 66 | /* The following two are not fully implemented. | |
| 67 | They are used in emitting insns, but they aren't distinguished from | |
| 68 | RELOAD_OTHER when computing the number of spills. What they accomplish | |
| 69 | is to avoid precluding inheritance of already loaded values | |
| 70 | for input reloads when there are also output reloads. */ | |
| 71 | RELOAD_FOR_INPUT, | |
| 72 | RELOAD_FOR_OUTPUT, | |
| 73 | RELOAD_OTHER | |
| 74 | }; | |
| 75 | ||
| 76 | extern enum reload_when_needed reload_when_needed[MAX_RELOADS]; | |
| 77 | ||
| 78 | extern rtx *reg_equiv_constant; | |
| 79 | extern rtx *reg_equiv_memory_loc; | |
| 80 | extern rtx *reg_equiv_address; | |
| 81 | extern rtx *reg_equiv_mem; | |
| 82 | ||
| 83 | /* All the "earlyclobber" operands of the current insn | |
| 84 | are recorded here. */ | |
| 85 | extern int n_earlyclobbers; | |
| 86 | extern rtx reload_earlyclobbers[MAX_RECOG_OPERANDS]; | |
| 87 | ||
| 88 | /* First uid used by insns created by reload in this function. | |
| 89 | Used in find_equiv_reg. */ | |
| 90 | extern int reload_first_uid; | |
| 91 | ||
| 92 | /* Nonzero if indirect addressing is supported when the innermost MEM is | |
| 93 | of the form (MEM (SYMBOL_REF sym)). It is assumed that the level to | |
| 94 | which these are valid is the same as spill_indirect_levels, above. */ | |
| 95 | ||
| 96 | extern char indirect_symref_ok; | |
| 97 | ||
| 98 | /* Nonzero if an address (plus (reg frame_pointer) (reg ...)) is valid. */ | |
| 99 | extern char double_reg_address_ok; | |
| 100 | ||
| 101 | #ifdef MAX_INSN_CODE | |
| 102 | /* These arrays record the insn_code of insns that may be needed to | |
| 103 | perform input and output reloads of special objects. They provide a | |
| 104 | place to pass a scratch register. */ | |
| 105 | extern enum insn_code reload_in_optab[]; | |
| 106 | extern enum insn_code reload_out_optab[]; | |
| 107 | #endif | |
| 108 | ||
| 109 | extern void init_reload (); | |
| 110 | extern void find_reloads (); | |
| 111 | extern void subst_reloads (); | |
| 112 | extern rtx get_secondary_mem (); | |
| 113 | extern rtx eliminate_regs (); | |
| 114 | extern rtx gen_input_reload (); | |
| 115 | extern rtx find_replacement (); |