1636 lines
65 KiB
C
1636 lines
65 KiB
C
/* Register Transfer Language (RTL) definitions for GNU C-Compiler
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Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
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2000, 2001 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _RTL_H
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#define _RTL_H
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#include "machmode.h"
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#undef FFS /* Some systems predefine this symbol; don't let it interfere. */
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#undef FLOAT /* Likewise. */
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#undef ABS /* Likewise. */
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#undef PC /* Likewise. */
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#ifndef TREE_CODE
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union tree_node;
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#endif
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/* Register Transfer Language EXPRESSIONS CODES */
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#define RTX_CODE enum rtx_code
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enum rtx_code {
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#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM ,
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#include "rtl.def" /* rtl expressions are documented here */
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#undef DEF_RTL_EXPR
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LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for
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NUM_RTX_CODE.
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Assumes default enum value assignment. */
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#define NUM_RTX_CODE ((int)LAST_AND_UNUSED_RTX_CODE)
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/* The cast here, saves many elsewhere. */
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extern int rtx_length[];
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#define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)])
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extern char *rtx_name[];
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#define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)])
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extern char *rtx_format[];
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#define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)])
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extern char rtx_class[];
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#define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)])
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/* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label
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relative to which the offsets are calculated, as explained in rtl.def. */
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typedef struct
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{
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/* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
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unsigned min_align: 8;
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/* Flags: */
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unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */
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unsigned min_after_vec: 1; /* minimum address target label is after the ADDR_DIFF_VEC. */
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unsigned max_after_vec: 1; /* maximum address target label is after the ADDR_DIFF_VEC. */
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unsigned min_after_base: 1; /* minimum address target label is after BASE. */
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unsigned max_after_base: 1; /* maximum address target label is after BASE. */
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/* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
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unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */
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unsigned : 2;
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unsigned scale : 8;
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} addr_diff_vec_flags;
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/* Common union for an element of an rtx. */
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typedef union rtunion_def
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{
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HOST_WIDE_INT rtwint;
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int rtint;
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char *rtstr;
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struct rtx_def *rtx;
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struct rtvec_def *rtvec;
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enum machine_mode rttype;
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addr_diff_vec_flags rt_addr_diff_vec_flags;
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struct bitmap_head_def *rtbit;
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union tree_node *rttree;
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struct basic_block_def *bb;
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} rtunion;
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/* RTL expression ("rtx"). */
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typedef struct rtx_def
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{
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#ifdef ONLY_INT_FIELDS
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#ifdef CODE_FIELD_BUG
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unsigned int code : 16;
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#else
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unsigned short code;
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#endif
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#else
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/* The kind of expression this is. */
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enum rtx_code code : 16;
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#endif
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/* The kind of value the expression has. */
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#ifdef ONLY_INT_FIELDS
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int mode : 8;
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#else
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enum machine_mode mode : 8;
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#endif
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/* LINK_COST_ZERO in an INSN_LIST. */
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unsigned int jump : 1;
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/* LINK_COST_FREE in an INSN_LIST. */
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unsigned int call : 1;
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/* 1 in a MEM or REG if value of this expression will never change
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during the current function, even though it is not
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manifestly constant.
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1 in a SUBREG if it is from a promoted variable that is unsigned.
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1 in a SYMBOL_REF if it addresses something in the per-function
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constants pool.
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1 in a CALL_INSN if it is a const call.
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1 in a JUMP_INSN if it is a branch that should be annulled. Valid from
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reorg until end of compilation; cleared before used. */
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unsigned int unchanging : 1;
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/* 1 in a MEM expression if contents of memory are volatile.
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1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER
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if it is deleted.
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1 in a REG expression if corresponds to a variable declared by the user.
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0 for an internally generated temporary.
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In a SYMBOL_REF, this flag is used for machine-specific purposes.
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In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */
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unsigned int volatil : 1;
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/* 1 in a MEM referring to a field of an aggregate.
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0 if the MEM was a variable or the result of a * operator in C;
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1 if it was the result of a . or -> operator (on a struct) in C.
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1 in a REG if the register is used only in exit code a loop.
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1 in a SUBREG expression if was generated from a variable with a
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promoted mode.
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1 in a CODE_LABEL if the label is used for nonlocal gotos
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and must not be deleted even if its count is zero.
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1 in a LABEL_REF if this is a reference to a label outside the
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current loop.
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1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled
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together with the preceding insn. Valid only within sched.
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1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
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from the target of a branch. Valid from reorg until end of compilation;
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cleared before used. */
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unsigned int in_struct : 1;
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/* 1 if this rtx is used. This is used for copying shared structure.
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See `unshare_all_rtl'.
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In a REG, this is not needed for that purpose, and used instead
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in `leaf_renumber_regs_insn'.
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In a SYMBOL_REF, means that emit_library_call
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has used it as the function. */
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unsigned int used : 1;
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/* Nonzero if this rtx came from procedure integration.
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In a REG, nonzero means this reg refers to the return value
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of the current function. */
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unsigned integrated : 1;
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/* 1 in an INSN or a SET if this rtx is related to the call frame,
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either changing how we compute the frame address or saving and
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restoring registers in the prologue and epilogue.
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1 in a MEM if the MEM refers to a scalar, rather than a member of
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an aggregate. */
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unsigned frame_related : 1;
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/* The first element of the operands of this rtx.
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The number of operands and their types are controlled
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by the `code' field, according to rtl.def. */
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rtunion fld[1];
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} *rtx;
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#define NULL_RTX (rtx) 0
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/* Define macros to access the `code' field of the rtx. */
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#ifdef SHORT_ENUM_BUG
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#define GET_CODE(RTX) ((enum rtx_code) ((RTX)->code))
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#define PUT_CODE(RTX, CODE) ((RTX)->code = ((short) (CODE)))
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#else
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#define GET_CODE(RTX) ((RTX)->code)
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#define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
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#endif
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#define GET_MODE(RTX) ((RTX)->mode)
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#define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
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#define RTX_INTEGRATED_P(RTX) ((RTX)->integrated)
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#define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging)
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#define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related)
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/* RTL vector. These appear inside RTX's when there is a need
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for a variable number of things. The principle use is inside
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PARALLEL expressions. */
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typedef struct rtvec_def{
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int num_elem; /* number of elements */
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rtunion elem[1];
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} *rtvec;
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#define NULL_RTVEC (rtvec) 0
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#define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem)
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#define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM))
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#define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[(I)].rtx)
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/* 1 if X is a REG. */
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#define REG_P(X) (GET_CODE (X) == REG)
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/* 1 if X is a constant value that is an integer. */
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#define CONSTANT_P(X) \
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(GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
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|| GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \
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|| GET_CODE (X) == CONST || GET_CODE (X) == HIGH \
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|| GET_CODE (X) == CONSTANT_P_RTX)
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/* General accessor macros for accessing the fields of an rtx. */
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#define XEXP(RTX, N) ((RTX)->fld[N].rtx)
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#define XINT(RTX, N) ((RTX)->fld[N].rtint)
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#define XWINT(RTX, N) ((RTX)->fld[N].rtwint)
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#define XSTR(RTX, N) ((RTX)->fld[N].rtstr)
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#define XVEC(RTX, N) ((RTX)->fld[N].rtvec)
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#define XVECLEN(RTX, N) ((RTX)->fld[N].rtvec->num_elem)
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#define XVECEXP(RTX,N,M)((RTX)->fld[N].rtvec->elem[M].rtx)
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#define XBITMAP(RTX, N) ((RTX)->fld[N].rtbit)
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#define XTREE(RTX, N) ((RTX)->fld[N].rttree)
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/* ACCESS MACROS for particular fields of insns. */
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/* Holds a unique number for each insn.
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These are not necessarily sequentially increasing. */
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#define INSN_UID(INSN) ((INSN)->fld[0].rtint)
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/* Chain insns together in sequence. */
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#define PREV_INSN(INSN) ((INSN)->fld[1].rtx)
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#define NEXT_INSN(INSN) ((INSN)->fld[2].rtx)
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/* The body of an insn. */
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#define PATTERN(INSN) ((INSN)->fld[3].rtx)
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/* Code number of instruction, from when it was recognized.
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-1 means this instruction has not been recognized yet. */
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#define INSN_CODE(INSN) ((INSN)->fld[4].rtint)
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/* Set up in flow.c; empty before then.
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Holds a chain of INSN_LIST rtx's whose first operands point at
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previous insns with direct data-flow connections to this one.
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That means that those insns set variables whose next use is in this insn.
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They are always in the same basic block as this insn. */
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#define LOG_LINKS(INSN) ((INSN)->fld[5].rtx)
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/* 1 if insn has been deleted. */
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#define INSN_DELETED_P(INSN) ((INSN)->volatil)
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/* 1 if insn is a call to a const function. */
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#define CONST_CALL_P(INSN) ((INSN)->unchanging)
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/* 1 if insn is a branch that should not unconditionally execute its
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delay slots, i.e., it is an annulled branch. */
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#define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging)
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/* 1 if insn is in a delay slot and is from the target of the branch. If
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the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
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executed if the branch is taken. For annulled branches with this bit
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clear, the insn should be executed only if the branch is not taken. */
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#define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct)
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/* Holds a list of notes on what this insn does to various REGs.
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It is a chain of EXPR_LIST rtx's, where the second operand
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is the chain pointer and the first operand is the REG being described.
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The mode field of the EXPR_LIST contains not a real machine mode
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but a value that says what this note says about the REG:
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REG_DEAD means that the value in REG dies in this insn (i.e., it is
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not needed past this insn). If REG is set in this insn, the REG_DEAD
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note may, but need not, be omitted.
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REG_INC means that the REG is autoincremented or autodecremented.
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REG_EQUIV describes the insn as a whole; it says that the insn
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sets a register to a constant value or to be equivalent to a memory
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address. If the register is spilled to the stack then the constant
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value should be substituted for it. The contents of the REG_EQUIV
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is the constant value or memory address, which may be different
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from the source of the SET although it has the same value. A
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REG_EQUIV note may also appear on an insn which copies a register
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parameter to a pseudo-register, if there is a memory address which
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could be used to hold that pseudo-register throughout the function.
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REG_EQUAL is like REG_EQUIV except that the destination
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is only momentarily equal to the specified rtx. Therefore, it
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cannot be used for substitution; but it can be used for cse.
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REG_RETVAL means that this insn copies the return-value of
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a library call out of the hard reg for return values. This note
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is actually an INSN_LIST and it points to the first insn involved
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in setting up arguments for the call. flow.c uses this to delete
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the entire library call when its result is dead.
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REG_LIBCALL is the inverse of REG_RETVAL: it goes on the first insn
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of the library call and points at the one that has the REG_RETVAL.
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REG_WAS_0 says that the register set in this insn held 0 before the insn.
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The contents of the note is the insn that stored the 0.
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If that insn is deleted or patched to a NOTE, the REG_WAS_0 is inoperative.
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The REG_WAS_0 note is actually an INSN_LIST, not an EXPR_LIST.
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REG_NONNEG means that the register is always nonnegative during
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the containing loop. This is used in branches so that decrement and
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branch instructions terminating on zero can be matched. There must be
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an insn pattern in the md file named `decrement_and_branch_until_zero'
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or else this will never be added to any instructions.
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REG_NO_CONFLICT means there is no conflict *after this insn*
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between the register in the note and the destination of this insn.
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REG_UNUSED identifies a register set in this insn and never used.
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REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use
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CC0, respectively. Normally, these are required to be consecutive insns,
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but we permit putting a cc0-setting insn in the delay slot of a branch
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as long as only one copy of the insn exists. In that case, these notes
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point from one to the other to allow code generation to determine what
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any require information and to properly update CC_STATUS.
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REG_LABEL points to a CODE_LABEL. Used by non-JUMP_INSNs to
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say that the CODE_LABEL contained in the REG_LABEL note is used
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by the insn.
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REG_DEP_ANTI is used in LOG_LINKS which represent anti (write after read)
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dependencies. REG_DEP_OUTPUT is used in LOG_LINKS which represent output
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(write after write) dependencies. Data dependencies, which are the only
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type of LOG_LINK created by flow, are represented by a 0 reg note kind. */
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/* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs when the flag
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-fbranch-probabilities is given. It has an integer value. For jumps,
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it is the probability that this is a taken branch. For calls, it is the
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probability that this call won't return.
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REG_EXEC_COUNT is attached to the first insn of each basic block, and
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the first insn after each CALL_INSN. It indicates how many times this
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block was executed.
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REG_SAVE_AREA is used to optimize rtl generated by dynamic stack
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allocations for targets where SETJMP_VIA_SAVE_AREA is true.
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REG_BR_PRED is attached to JUMP_INSNs only, it holds the branch prediction
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flags computed by get_jump_flags() after dbr scheduling is complete.
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REG_FRAME_RELATED_EXPR is attached to insns that are RTX_FRAME_RELATED_P,
|
||
but are too complex for DWARF to interpret what they imply. The attached
|
||
rtx is used instead of intuition. */
|
||
/* REG_EH_REGION is used to indicate what exception region an INSN
|
||
belongs in. This can be used to indicate what region a call may throw
|
||
to. A REGION of 0 indicates that a call cannot throw at all.
|
||
A REGION of -1 indicates that it cannot throw, nor will it execute
|
||
a non-local goto.
|
||
REG_EH_RETHROW is used to indicate what that a call is actually a
|
||
call to rethrow, and specifies which region the rethrow is targetting.
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This provides a way to generate the non standard flow edges required
|
||
for a rethrow. */
|
||
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|
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#define REG_NOTES(INSN) ((INSN)->fld[6].rtx)
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||
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||
#define ADDR_DIFF_VEC_FLAGS(RTX) ((RTX)->fld[4].rt_addr_diff_vec_flags)
|
||
|
||
/* Don't forget to change reg_note_name in rtl.c. */
|
||
enum reg_note { REG_DEAD = 1, REG_INC = 2, REG_EQUIV = 3, REG_WAS_0 = 4,
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REG_EQUAL = 5, REG_RETVAL = 6, REG_LIBCALL = 7,
|
||
REG_NONNEG = 8, REG_NO_CONFLICT = 9, REG_UNUSED = 10,
|
||
REG_CC_SETTER = 11, REG_CC_USER = 12, REG_LABEL = 13,
|
||
REG_DEP_ANTI = 14, REG_DEP_OUTPUT = 15, REG_BR_PROB = 16,
|
||
REG_EXEC_COUNT = 17, REG_NOALIAS = 18, REG_SAVE_AREA = 19,
|
||
REG_BR_PRED = 20, REG_EH_CONTEXT = 21,
|
||
REG_FRAME_RELATED_EXPR = 22, REG_EH_REGION = 23,
|
||
REG_EH_RETHROW = 24 };
|
||
/* The base value for branch probability notes. */
|
||
#define REG_BR_PROB_BASE 10000
|
||
|
||
/* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */
|
||
#define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
|
||
#define PUT_REG_NOTE_KIND(LINK,KIND) PUT_MODE(LINK, (enum machine_mode) (KIND))
|
||
|
||
/* Names for REG_NOTE's in EXPR_LIST insn's. */
|
||
|
||
extern char *reg_note_name[];
|
||
#define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
|
||
|
||
/* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of
|
||
USE and CLOBBER expressions.
|
||
USE expressions list the registers filled with arguments that
|
||
are passed to the function.
|
||
CLOBBER expressions document the registers explicitly clobbered
|
||
by this CALL_INSN.
|
||
Pseudo registers can not be mentioned in this list. */
|
||
#define CALL_INSN_FUNCTION_USAGE(INSN) ((INSN)->fld[7].rtx)
|
||
|
||
/* The label-number of a code-label. The assembler label
|
||
is made from `L' and the label-number printed in decimal.
|
||
Label numbers are unique in a compilation. */
|
||
#define CODE_LABEL_NUMBER(INSN) ((INSN)->fld[3].rtint)
|
||
|
||
#define LINE_NUMBER NOTE
|
||
|
||
/* In a NOTE that is a line number, this is a string for the file name that the
|
||
line is in. We use the same field to record block numbers temporarily in
|
||
NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts
|
||
between ints and pointers if we use a different macro for the block number.)
|
||
The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their
|
||
information as a rtx in the field. */
|
||
|
||
#define NOTE_SOURCE_FILE(INSN) ((INSN)->fld[3].rtstr)
|
||
#define NOTE_BLOCK_NUMBER(INSN) ((INSN)->fld[3].rtint)
|
||
#define NOTE_RANGE_INFO(INSN) ((INSN)->fld[3].rtx)
|
||
#define NOTE_LIVE_INFO(INSN) ((INSN)->fld[3].rtx)
|
||
#define NOTE_BASIC_BLOCK(INSN) ((INSN)->fld[3].bb)
|
||
|
||
/* If the NOTE_BLOCK_NUMBER field gets a -1, it means create a new
|
||
block node for a live range block. */
|
||
#define NOTE_BLOCK_LIVE_RANGE_BLOCK -1
|
||
|
||
/* In a NOTE that is a line number, this is the line number.
|
||
Other kinds of NOTEs are identified by negative numbers here. */
|
||
#define NOTE_LINE_NUMBER(INSN) ((INSN)->fld[4].rtint)
|
||
|
||
/* Codes that appear in the NOTE_LINE_NUMBER field
|
||
for kinds of notes that are not line numbers.
|
||
|
||
Notice that we do not try to use zero here for any of
|
||
the special note codes because sometimes the source line
|
||
actually can be zero! This happens (for example) when we
|
||
are generating code for the per-translation-unit constructor
|
||
and destructor routines for some C++ translation unit.
|
||
|
||
If you should change any of the following values, or if you
|
||
should add a new value here, don't forget to change the
|
||
note_insn_name array in rtl.c. */
|
||
|
||
/* This note is used to get rid of an insn
|
||
when it isn't safe to patch the insn out of the chain. */
|
||
#define NOTE_INSN_DELETED -1
|
||
#define NOTE_INSN_BLOCK_BEG -2
|
||
#define NOTE_INSN_BLOCK_END -3
|
||
#define NOTE_INSN_LOOP_BEG -4
|
||
#define NOTE_INSN_LOOP_END -5
|
||
/* This kind of note is generated at the end of the function body,
|
||
just before the return insn or return label.
|
||
In an optimizing compilation it is deleted by the first jump optimization,
|
||
after enabling that optimizer to determine whether control can fall
|
||
off the end of the function body without a return statement. */
|
||
#define NOTE_INSN_FUNCTION_END -6
|
||
/* This kind of note is generated just after each call to `setjmp', et al. */
|
||
#define NOTE_INSN_SETJMP -7
|
||
/* Generated at the place in a loop that `continue' jumps to. */
|
||
#define NOTE_INSN_LOOP_CONT -8
|
||
/* Generated at the start of a duplicated exit test. */
|
||
#define NOTE_INSN_LOOP_VTOP -9
|
||
/* This marks the point immediately after the last prologue insn. */
|
||
#define NOTE_INSN_PROLOGUE_END -10
|
||
/* This marks the point immediately prior to the first epilogue insn. */
|
||
#define NOTE_INSN_EPILOGUE_BEG -11
|
||
/* Generated in place of user-declared labels when they are deleted. */
|
||
#define NOTE_INSN_DELETED_LABEL -12
|
||
/* This note indicates the start of the real body of the function,
|
||
i.e. the point just after all of the parms have been moved into
|
||
their homes, etc. */
|
||
#define NOTE_INSN_FUNCTION_BEG -13
|
||
/* These note where exception handling regions begin and end. */
|
||
#define NOTE_INSN_EH_REGION_BEG -14
|
||
#define NOTE_INSN_EH_REGION_END -15
|
||
/* Generated whenever a duplicate line number note is output. For example,
|
||
one is output after the end of an inline function, in order to prevent
|
||
the line containing the inline call from being counted twice in gcov. */
|
||
#define NOTE_REPEATED_LINE_NUMBER -16
|
||
|
||
/* Start/end of a live range region, where pseudos allocated on the stack can
|
||
be allocated to temporary registers. */
|
||
#define NOTE_INSN_RANGE_START -17
|
||
#define NOTE_INSN_RANGE_END -18
|
||
/* Record which registers are currently live. */
|
||
#define NOTE_INSN_LIVE -19
|
||
/* Record the struct for the following basic block. */
|
||
#define NOTE_INSN_BASIC_BLOCK -20
|
||
|
||
#if 0 /* These are not used, and I don't know what they were for. --rms. */
|
||
#define NOTE_DECL_NAME(INSN) ((INSN)->fld[3].rtstr)
|
||
#define NOTE_DECL_CODE(INSN) ((INSN)->fld[4].rtint)
|
||
#define NOTE_DECL_RTL(INSN) ((INSN)->fld[5].rtx)
|
||
#define NOTE_DECL_IDENTIFIER(INSN) ((INSN)->fld[6].rtint)
|
||
#define NOTE_DECL_TYPE(INSN) ((INSN)->fld[7].rtint)
|
||
#endif /* 0 */
|
||
|
||
/* Names for NOTE insn's other than line numbers. */
|
||
|
||
extern char *note_insn_name[];
|
||
#define GET_NOTE_INSN_NAME(NOTE_CODE) (note_insn_name[-(NOTE_CODE)])
|
||
|
||
/* The name of a label, in case it corresponds to an explicit label
|
||
in the input source code. */
|
||
#define LABEL_NAME(LABEL) ((LABEL)->fld[4].rtstr)
|
||
|
||
/* In jump.c, each label contains a count of the number
|
||
of LABEL_REFs that point at it, so unused labels can be deleted. */
|
||
#define LABEL_NUSES(LABEL) ((LABEL)->fld[5].rtint)
|
||
|
||
/* The original regno this ADDRESSOF was built for. */
|
||
#define ADDRESSOF_REGNO(RTX) ((RTX)->fld[1].rtint)
|
||
|
||
/* The variable in the register we took the address of. */
|
||
#define ADDRESSOF_DECL(X) ((tree) XEXP ((X), 2))
|
||
#define SET_ADDRESSOF_DECL(X, T) (XEXP ((X), 2) = (rtx) (T))
|
||
|
||
/* In jump.c, each JUMP_INSN can point to a label that it can jump to,
|
||
so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
|
||
be decremented and possibly the label can be deleted. */
|
||
#define JUMP_LABEL(INSN) ((INSN)->fld[7].rtx)
|
||
|
||
/* Once basic blocks are found in flow.c,
|
||
each CODE_LABEL starts a chain that goes through
|
||
all the LABEL_REFs that jump to that label.
|
||
The chain eventually winds up at the CODE_LABEL; it is circular. */
|
||
#define LABEL_REFS(LABEL) ((LABEL)->fld[6].rtx)
|
||
|
||
/* This is the field in the LABEL_REF through which the circular chain
|
||
of references to a particular label is linked.
|
||
This chain is set up in flow.c. */
|
||
|
||
#define LABEL_NEXTREF(REF) ((REF)->fld[1].rtx)
|
||
|
||
/* Once basic blocks are found in flow.c,
|
||
Each LABEL_REF points to its containing instruction with this field. */
|
||
|
||
#define CONTAINING_INSN(RTX) ((RTX)->fld[2].rtx)
|
||
|
||
/* For a REG rtx, REGNO extracts the register number. */
|
||
|
||
#define REGNO(RTX) ((RTX)->fld[0].rtint)
|
||
|
||
/* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg
|
||
is the current function's return value. */
|
||
|
||
#define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated)
|
||
|
||
/* 1 in a REG rtx if it corresponds to a variable declared by the user. */
|
||
#define REG_USERVAR_P(RTX) ((RTX)->volatil)
|
||
|
||
/* For a CONST_INT rtx, INTVAL extracts the integer. */
|
||
|
||
#define INTVAL(RTX) ((RTX)->fld[0].rtwint)
|
||
|
||
/* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
|
||
SUBREG_WORD extracts the word-number. */
|
||
|
||
#define SUBREG_REG(RTX) ((RTX)->fld[0].rtx)
|
||
#define SUBREG_WORD(RTX) ((RTX)->fld[1].rtint)
|
||
|
||
/* 1 if the REG contained in SUBREG_REG is already known to be
|
||
sign- or zero-extended from the mode of the SUBREG to the mode of
|
||
the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
|
||
extension.
|
||
|
||
When used as a LHS, is means that this extension must be done
|
||
when assigning to SUBREG_REG. */
|
||
|
||
#define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct)
|
||
#define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging)
|
||
|
||
/* Access various components of an ASM_OPERANDS rtx. */
|
||
|
||
#define ASM_OPERANDS_TEMPLATE(RTX) XSTR ((RTX), 0)
|
||
#define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XSTR ((RTX), 1)
|
||
#define ASM_OPERANDS_OUTPUT_IDX(RTX) XINT ((RTX), 2)
|
||
#define ASM_OPERANDS_INPUT_VEC(RTX) XVEC ((RTX), 3)
|
||
#define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XVEC ((RTX), 4)
|
||
#define ASM_OPERANDS_INPUT(RTX, N) XVECEXP ((RTX), 3, (N))
|
||
#define ASM_OPERANDS_INPUT_LENGTH(RTX) XVECLEN ((RTX), 3)
|
||
#define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) XSTR (XVECEXP ((RTX), 4, (N)), 0)
|
||
#define ASM_OPERANDS_INPUT_MODE(RTX, N) GET_MODE (XVECEXP ((RTX), 4, (N)))
|
||
#define ASM_OPERANDS_SOURCE_FILE(RTX) XSTR ((RTX), 5)
|
||
#define ASM_OPERANDS_SOURCE_LINE(RTX) XINT ((RTX), 6)
|
||
|
||
/* For a MEM rtx, 1 if it's a volatile reference.
|
||
Also in an ASM_OPERANDS rtx. */
|
||
#define MEM_VOLATILE_P(RTX) ((RTX)->volatil)
|
||
|
||
/* For a MEM rtx, 1 if it refers to a field of an aggregate. If zero,
|
||
RTX may or may not refer to a field of an aggregate. */
|
||
#define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct)
|
||
|
||
/* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may
|
||
not refer to a scalar.*/
|
||
#define MEM_SCALAR_P(RTX) ((RTX)->frame_related)
|
||
|
||
/* Copy the MEM_VOLATILE_P, MEM_IN_STRUCT_P, and MEM_SCALAR_P
|
||
attributes from RHS to LHS. */
|
||
#define MEM_COPY_ATTRIBUTES(LHS, RHS) \
|
||
(MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \
|
||
MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
|
||
MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS))
|
||
|
||
/* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
|
||
RTX. Otherwise, vice versa. Use this macro only when you are
|
||
*sure* that you know that the MEM is in a structure, or is a
|
||
scalar. VAL is evaluated only once. */
|
||
#define MEM_SET_IN_STRUCT_P(RTX, VAL) \
|
||
((VAL) ? (MEM_IN_STRUCT_P (RTX) = 1, MEM_SCALAR_P (RTX) = 0) \
|
||
: (MEM_IN_STRUCT_P (RTX) = 0, MEM_SCALAR_P (RTX) = 1))
|
||
|
||
/* For a MEM rtx, the alias set. If 0, this MEM is not in any alias
|
||
set, and may alias anything. Otherwise, the MEM can only alias
|
||
MEMs in the same alias set. This value is set in a
|
||
language-dependent manner in the front-end, and should not be
|
||
altered in the back-end. These set numbers are tested for zero,
|
||
and compared for equality; they have no other significance. In
|
||
some front-ends, these numbers may correspond in some way to types,
|
||
or other language-level entities, but they need not, and the
|
||
back-end makes no such assumptions. */
|
||
#define MEM_ALIAS_SET(RTX) (XINT (RTX, 1))
|
||
|
||
/* For a LABEL_REF, 1 means that this reference is to a label outside the
|
||
loop containing the reference. */
|
||
#define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct)
|
||
|
||
/* For a LABEL_REF, 1 means it is for a nonlocal label. */
|
||
/* Likewise in an EXPR_LIST for a REG_LABEL note. */
|
||
#define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil)
|
||
|
||
/* For a CODE_LABEL, 1 means always consider this label to be needed. */
|
||
#define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct)
|
||
|
||
/* For a REG, 1 means the register is used only in an exit test of a loop. */
|
||
#define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct)
|
||
|
||
/* During sched, for an insn, 1 means that the insn must be scheduled together
|
||
with the preceding insn. */
|
||
#define SCHED_GROUP_P(INSN) ((INSN)->in_struct)
|
||
|
||
/* During sched, for the LOG_LINKS of an insn, these cache the adjusted
|
||
cost of the dependence link. The cost of executing an instruction
|
||
may vary based on how the results are used. LINK_COST_ZERO is 1 when
|
||
the cost through the link varies and is unchanged (i.e., the link has
|
||
zero additional cost). LINK_COST_FREE is 1 when the cost through the
|
||
link is zero (i.e., the link makes the cost free). In other cases,
|
||
the adjustment to the cost is recomputed each time it is needed. */
|
||
#define LINK_COST_ZERO(X) ((X)->jump)
|
||
#define LINK_COST_FREE(X) ((X)->call)
|
||
|
||
/* For a SET rtx, SET_DEST is the place that is set
|
||
and SET_SRC is the value it is set to. */
|
||
#define SET_DEST(RTX) ((RTX)->fld[0].rtx)
|
||
#define SET_SRC(RTX) ((RTX)->fld[1].rtx)
|
||
|
||
/* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */
|
||
#define TRAP_CONDITION(RTX) ((RTX)->fld[0].rtx)
|
||
#define TRAP_CODE(RTX) (RTX)->fld[1].rtx
|
||
|
||
/* 1 in a SYMBOL_REF if it addresses this function's constants pool. */
|
||
#define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging)
|
||
|
||
/* Flag in a SYMBOL_REF for machine-specific purposes. */
|
||
#define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil)
|
||
|
||
/* 1 in a SYMBOL_REF if it represents a symbol which might have to change
|
||
if its inlined or unrolled. */
|
||
#define SYMBOL_REF_NEED_ADJUST(RTX) ((RTX)->in_struct)
|
||
|
||
/* 1 means a SYMBOL_REF has been the library function in emit_library_call. */
|
||
#define SYMBOL_REF_USED(RTX) ((RTX)->used)
|
||
|
||
/* For an INLINE_HEADER rtx, FIRST_FUNCTION_INSN is the first insn
|
||
of the function that is not involved in copying parameters to
|
||
pseudo-registers. FIRST_PARM_INSN is the very first insn of
|
||
the function, including the parameter copying.
|
||
We keep this around in case we must splice
|
||
this function into the assembly code at the end of the file.
|
||
FIRST_LABELNO is the first label number used by the function (inclusive).
|
||
LAST_LABELNO is the last label used by the function (exclusive).
|
||
MAX_REGNUM is the largest pseudo-register used by that function.
|
||
FUNCTION_ARGS_SIZE is the size of the argument block in the stack.
|
||
POPS_ARGS is the number of bytes of input arguments popped by the function
|
||
STACK_SLOT_LIST is the list of stack slots.
|
||
FORCED_LABELS is the list of labels whose address was taken.
|
||
FUNCTION_FLAGS are where single-bit flags are saved.
|
||
OUTGOING_ARGS_SIZE is the size of the largest outgoing stack parameter list.
|
||
ORIGINAL_ARG_VECTOR is a vector of the original DECL_RTX values
|
||
for the function arguments.
|
||
ORIGINAL_DECL_INITIAL is a pointer to the original DECL_INITIAL for the
|
||
function.
|
||
INLINE_REGNO_REG_RTX, INLINE_REGNO_POINTER_FLAG, and
|
||
INLINE_REGNO_POINTER_ALIGN are pointers to the corresponding arrays.
|
||
|
||
We want this to lay down like an INSN. The PREV_INSN field
|
||
is always NULL. The NEXT_INSN field always points to the
|
||
first function insn of the function being squirreled away. */
|
||
|
||
#define FIRST_FUNCTION_INSN(RTX) ((RTX)->fld[2].rtx)
|
||
#define FIRST_PARM_INSN(RTX) ((RTX)->fld[3].rtx)
|
||
#define FIRST_LABELNO(RTX) ((RTX)->fld[4].rtint)
|
||
#define LAST_LABELNO(RTX) ((RTX)->fld[5].rtint)
|
||
#define MAX_PARMREG(RTX) ((RTX)->fld[6].rtint)
|
||
#define MAX_REGNUM(RTX) ((RTX)->fld[7].rtint)
|
||
#define FUNCTION_ARGS_SIZE(RTX) ((RTX)->fld[8].rtint)
|
||
#define POPS_ARGS(RTX) ((RTX)->fld[9].rtint)
|
||
#define STACK_SLOT_LIST(RTX) ((RTX)->fld[10].rtx)
|
||
#define FORCED_LABELS(RTX) ((RTX)->fld[11].rtx)
|
||
#define FUNCTION_FLAGS(RTX) ((RTX)->fld[12].rtint)
|
||
#define OUTGOING_ARGS_SIZE(RTX) ((RTX)->fld[13].rtint)
|
||
#define ORIGINAL_ARG_VECTOR(RTX) ((RTX)->fld[14].rtvec)
|
||
#define ORIGINAL_DECL_INITIAL(RTX) ((RTX)->fld[15].rtx)
|
||
#define INLINE_REGNO_REG_RTX(RTX) ((RTX)->fld[16].rtvec)
|
||
#define INLINE_REGNO_POINTER_FLAG(RTX) ((RTX)->fld[17].rtstr)
|
||
#define INLINE_REGNO_POINTER_ALIGN(RTX) ((RTX)->fld[18].rtstr)
|
||
#define PARMREG_STACK_LOC(RTX) ((RTX)->fld[19].rtvec)
|
||
|
||
/* In FUNCTION_FLAGS we save some variables computed when emitting the code
|
||
for the function and which must be `or'ed into the current flag values when
|
||
insns from that function are being inlined. */
|
||
|
||
/* These ought to be an enum, but non-ANSI compilers don't like that. */
|
||
#define FUNCTION_FLAGS_CALLS_ALLOCA 01
|
||
#define FUNCTION_FLAGS_CALLS_SETJMP 02
|
||
#define FUNCTION_FLAGS_RETURNS_STRUCT 04
|
||
#define FUNCTION_FLAGS_RETURNS_PCC_STRUCT 010
|
||
#define FUNCTION_FLAGS_NEEDS_CONTEXT 020
|
||
#define FUNCTION_FLAGS_HAS_NONLOCAL_LABEL 040
|
||
#define FUNCTION_FLAGS_RETURNS_POINTER 0100
|
||
#define FUNCTION_FLAGS_USES_CONST_POOL 0200
|
||
#define FUNCTION_FLAGS_CALLS_LONGJMP 0400
|
||
#define FUNCTION_FLAGS_USES_PIC_OFFSET_TABLE 01000
|
||
#define FUNCTION_FLAGS_HAS_COMPUTED_JUMP 02000
|
||
|
||
/* Define a macro to look for REG_INC notes,
|
||
but save time on machines where they never exist. */
|
||
|
||
/* Don't continue this line--convex cc version 4.1 would lose. */
|
||
#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
|
||
#define FIND_REG_INC_NOTE(insn, reg) (find_reg_note ((insn), REG_INC, (reg)))
|
||
#else
|
||
#define FIND_REG_INC_NOTE(insn, reg) 0
|
||
#endif
|
||
|
||
/* Indicate whether the machine has any sort of auto increment addressing.
|
||
If not, we can avoid checking for REG_INC notes. */
|
||
|
||
/* Don't continue this line--convex cc version 4.1 would lose. */
|
||
#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT))
|
||
#define AUTO_INC_DEC
|
||
#endif
|
||
|
||
#ifndef HAVE_PRE_INCREMENT
|
||
#define HAVE_PRE_INCREMENT 0
|
||
#endif
|
||
|
||
#ifndef HAVE_PRE_DECREMENT
|
||
#define HAVE_PRE_DECREMENT 0
|
||
#endif
|
||
|
||
#ifndef HAVE_POST_INCREMENT
|
||
#define HAVE_POST_INCREMENT 0
|
||
#endif
|
||
|
||
#ifndef HAVE_POST_DECREMENT
|
||
#define HAVE_POST_DECREMENT 0
|
||
#endif
|
||
|
||
|
||
/* Some architectures do not have complete pre/post increment/decrement
|
||
instruction sets, or only move some modes efficiently. These macros
|
||
allow us to tune autoincrement generation. */
|
||
|
||
#ifndef USE_LOAD_POST_INCREMENT
|
||
#define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
|
||
#endif
|
||
|
||
#ifndef USE_LOAD_POST_DECREMENT
|
||
#define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
|
||
#endif
|
||
|
||
#ifndef USE_LOAD_PRE_INCREMENT
|
||
#define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
|
||
#endif
|
||
|
||
#ifndef USE_LOAD_PRE_DECREMENT
|
||
#define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
|
||
#endif
|
||
|
||
#ifndef USE_STORE_POST_INCREMENT
|
||
#define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT
|
||
#endif
|
||
|
||
#ifndef USE_STORE_POST_DECREMENT
|
||
#define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT
|
||
#endif
|
||
|
||
#ifndef USE_STORE_PRE_INCREMENT
|
||
#define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT
|
||
#endif
|
||
|
||
#ifndef USE_STORE_PRE_DECREMENT
|
||
#define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT
|
||
#endif
|
||
|
||
|
||
/* Accessors for RANGE_INFO. */
|
||
/* For RANGE_{START,END} notes return the RANGE_START note. */
|
||
#define RANGE_INFO_NOTE_START(INSN) (XEXP (INSN, 0))
|
||
|
||
/* For RANGE_{START,END} notes return the RANGE_START note. */
|
||
#define RANGE_INFO_NOTE_END(INSN) (XEXP (INSN, 1))
|
||
|
||
/* For RANGE_{START,END} notes, return the vector containing the registers used
|
||
in the range. */
|
||
#define RANGE_INFO_REGS(INSN) (XVEC (INSN, 2))
|
||
#define RANGE_INFO_REGS_REG(INSN, N) (XVECEXP (INSN, 2, N))
|
||
#define RANGE_INFO_NUM_REGS(INSN) (XVECLEN (INSN, 2))
|
||
|
||
/* For RANGE_{START,END} notes, the number of calls within the range. */
|
||
#define RANGE_INFO_NCALLS(INSN) (XINT (INSN, 3))
|
||
|
||
/* For RANGE_{START,END} notes, the number of insns within the range. */
|
||
#define RANGE_INFO_NINSNS(INSN) (XINT (INSN, 4))
|
||
|
||
/* For RANGE_{START,END} notes, a unique # to identify this range. */
|
||
#define RANGE_INFO_UNIQUE(INSN) (XINT (INSN, 5))
|
||
|
||
/* For RANGE_{START,END} notes, the basic block # the range starts with. */
|
||
#define RANGE_INFO_BB_START(INSN) (XINT (INSN, 6))
|
||
|
||
/* For RANGE_{START,END} notes, the basic block # the range ends with. */
|
||
#define RANGE_INFO_BB_END(INSN) (XINT (INSN, 7))
|
||
|
||
/* For RANGE_{START,END} notes, the loop depth the range is in. */
|
||
#define RANGE_INFO_LOOP_DEPTH(INSN) (XINT (INSN, 8))
|
||
|
||
/* For RANGE_{START,END} notes, the bitmap of live registers at the start
|
||
of the range. */
|
||
#define RANGE_INFO_LIVE_START(INSN) (XBITMAP (INSN, 9))
|
||
|
||
/* For RANGE_{START,END} notes, the bitmap of live registers at the end
|
||
of the range. */
|
||
#define RANGE_INFO_LIVE_END(INSN) (XBITMAP (INSN, 10))
|
||
|
||
/* For RANGE_START notes, the marker # of the start of the range. */
|
||
#define RANGE_INFO_MARKER_START(INSN) (XINT (INSN, 11))
|
||
|
||
/* For RANGE_START notes, the marker # of the end of the range. */
|
||
#define RANGE_INFO_MARKER_END(INSN) (XINT (INSN, 12))
|
||
|
||
/* Original pseudo register # for a live range note. */
|
||
#define RANGE_REG_PSEUDO(INSN,N) (XINT (XVECEXP (INSN, 2, N), 0))
|
||
|
||
/* Pseudo register # original register is copied into or -1. */
|
||
#define RANGE_REG_COPY(INSN,N) (XINT (XVECEXP (INSN, 2, N), 1))
|
||
|
||
/* How many times a register in a live range note was referenced. */
|
||
#define RANGE_REG_REFS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 2))
|
||
|
||
/* How many times a register in a live range note was set. */
|
||
#define RANGE_REG_SETS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 3))
|
||
|
||
/* How many times a register in a live range note died. */
|
||
#define RANGE_REG_DEATHS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 4))
|
||
|
||
/* Whether the original value is needed to be copied into the range register at
|
||
the start of the range. */
|
||
#define RANGE_REG_COPY_FLAGS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 5))
|
||
|
||
/* # of insns the register copy is live over. */
|
||
#define RANGE_REG_LIVE_LENGTH(INSN,N) (XINT (XVECEXP (INSN, 2, N), 6))
|
||
|
||
/* # of calls the register copy is live over. */
|
||
#define RANGE_REG_N_CALLS(INSN,N) (XINT (XVECEXP (INSN, 2, N), 7))
|
||
|
||
/* DECL_NODE pointer of the declaration if the register is a user defined
|
||
variable. */
|
||
#define RANGE_REG_SYMBOL_NODE(INSN,N) (XTREE (XVECEXP (INSN, 2, N), 8))
|
||
|
||
/* BLOCK_NODE pointer to the block the variable is declared in if the
|
||
register is a user defined variable. */
|
||
#define RANGE_REG_BLOCK_NODE(INSN,N) (XTREE (XVECEXP (INSN, 2, N), 9))
|
||
|
||
/* EXPR_LIST of the distinct ranges a variable is in. */
|
||
#define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0))
|
||
|
||
/* Block a variable is declared in. */
|
||
#define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1))
|
||
|
||
/* # of distinct ranges a variable is in. */
|
||
#define RANGE_VAR_NUM(INSN) (XINT (INSN, 2))
|
||
|
||
/* For a NOTE_INSN_LIVE note, the registers which are currently live. */
|
||
#define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0))
|
||
|
||
/* For a NOTE_INSN_LIVE note, the original basic block number. */
|
||
#define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1))
|
||
|
||
/* Generally useful functions. */
|
||
|
||
/* The following functions accept a wide integer argument. Rather than
|
||
having to cast on every function call, we use a macro instead, that is
|
||
defined here and in tree.h. */
|
||
|
||
#ifndef exact_log2
|
||
#define exact_log2(N) exact_log2_wide ((unsigned HOST_WIDE_INT) (N))
|
||
#define floor_log2(N) floor_log2_wide ((unsigned HOST_WIDE_INT) (N))
|
||
#endif
|
||
extern int exact_log2_wide PROTO((unsigned HOST_WIDE_INT));
|
||
extern int floor_log2_wide PROTO((unsigned HOST_WIDE_INT));
|
||
|
||
/* In expmed.c */
|
||
extern int ceil_log2 PROTO((unsigned HOST_WIDE_INT));
|
||
|
||
#define plus_constant(X,C) plus_constant_wide (X, (HOST_WIDE_INT) (C))
|
||
|
||
#define plus_constant_for_output(X,C) \
|
||
plus_constant_for_output_wide (X, (HOST_WIDE_INT) (C))
|
||
|
||
/* In explow.c */
|
||
extern rtx plus_constant_wide PROTO((rtx, HOST_WIDE_INT));
|
||
extern rtx plus_constant_for_output_wide PROTO((rtx, HOST_WIDE_INT));
|
||
extern void optimize_save_area_alloca PROTO((rtx));
|
||
|
||
extern rtx gen_rtx PVPROTO((enum rtx_code,
|
||
enum machine_mode, ...));
|
||
extern rtvec gen_rtvec PVPROTO((int, ...));
|
||
|
||
#ifdef BUFSIZ
|
||
extern rtx read_rtx PROTO((FILE *));
|
||
#endif
|
||
|
||
extern char *oballoc PROTO((int));
|
||
extern char *permalloc PROTO((int));
|
||
extern rtx rtx_alloc PROTO((RTX_CODE));
|
||
extern rtvec rtvec_alloc PROTO((int));
|
||
extern rtx copy_rtx PROTO((rtx));
|
||
extern rtx copy_rtx_if_shared PROTO((rtx));
|
||
extern rtx copy_most_rtx PROTO((rtx, rtx));
|
||
extern rtx shallow_copy_rtx PROTO((rtx));
|
||
extern rtvec gen_rtvec_v PROTO((int, rtx *));
|
||
extern rtvec gen_rtvec_vv PROTO((int, rtunion *));
|
||
extern rtx gen_reg_rtx PROTO((enum machine_mode));
|
||
extern rtx gen_label_rtx PROTO((void));
|
||
extern rtx gen_inline_header_rtx PROTO((rtx, rtx, int, int, int, int,
|
||
int, int, rtx, rtx, int, int,
|
||
rtvec, rtx,
|
||
rtvec, char *, char *, rtvec));
|
||
extern rtx gen_lowpart_common PROTO((enum machine_mode, rtx));
|
||
extern rtx gen_lowpart PROTO((enum machine_mode, rtx));
|
||
extern rtx gen_lowpart_if_possible PROTO((enum machine_mode, rtx));
|
||
extern rtx gen_highpart PROTO((enum machine_mode, rtx));
|
||
extern rtx gen_realpart PROTO((enum machine_mode, rtx));
|
||
extern rtx gen_imagpart PROTO((enum machine_mode, rtx));
|
||
extern rtx operand_subword PROTO((rtx, int, int, enum machine_mode));
|
||
extern rtx operand_subword_force PROTO((rtx, int, enum machine_mode));
|
||
extern int subreg_lowpart_p PROTO((rtx));
|
||
extern rtx make_safe_from PROTO((rtx, rtx));
|
||
extern rtx convert_memory_address PROTO((enum machine_mode, rtx));
|
||
extern rtx memory_address PROTO((enum machine_mode, rtx));
|
||
extern rtx get_insns PROTO((void));
|
||
extern rtx get_last_insn PROTO((void));
|
||
extern rtx get_last_insn_anywhere PROTO((void));
|
||
extern void start_sequence PROTO((void));
|
||
extern void push_to_sequence PROTO((rtx));
|
||
extern void end_sequence PROTO((void));
|
||
extern rtx gen_sequence PROTO((void));
|
||
extern rtx immed_double_const PROTO((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode));
|
||
extern rtx force_const_mem PROTO((enum machine_mode, rtx));
|
||
extern rtx force_reg PROTO((enum machine_mode, rtx));
|
||
extern rtx get_pool_constant PROTO((rtx));
|
||
extern enum machine_mode get_pool_mode PROTO((rtx));
|
||
extern int get_pool_offset PROTO((rtx));
|
||
extern rtx simplify_subtraction PROTO((rtx));
|
||
extern rtx assign_stack_local PROTO((enum machine_mode,
|
||
HOST_WIDE_INT, int));
|
||
extern rtx assign_stack_temp PROTO((enum machine_mode,
|
||
HOST_WIDE_INT, int));
|
||
extern rtx assign_temp PROTO((union tree_node *,
|
||
int, int, int));
|
||
extern rtx protect_from_queue PROTO((rtx, int));
|
||
extern void emit_queue PROTO((void));
|
||
extern rtx emit_move_insn PROTO((rtx, rtx));
|
||
extern rtx emit_insn_before PROTO((rtx, rtx));
|
||
extern rtx emit_jump_insn_before PROTO((rtx, rtx));
|
||
extern rtx emit_call_insn_before PROTO((rtx, rtx));
|
||
extern rtx emit_barrier_before PROTO((rtx));
|
||
extern rtx emit_label_before PROTO((rtx, rtx));
|
||
extern rtx emit_note_before PROTO((int, rtx));
|
||
extern rtx emit_insn_after PROTO((rtx, rtx));
|
||
extern rtx emit_jump_insn_after PROTO((rtx, rtx));
|
||
extern rtx emit_barrier_after PROTO((rtx));
|
||
extern rtx emit_label_after PROTO((rtx, rtx));
|
||
extern rtx emit_note_after PROTO((int, rtx));
|
||
extern rtx emit_line_note_after PROTO((char *, int, rtx));
|
||
extern rtx emit_insn PROTO((rtx));
|
||
extern rtx emit_insns PROTO((rtx));
|
||
extern rtx emit_insns_before PROTO((rtx, rtx));
|
||
extern rtx emit_insns_after PROTO((rtx, rtx));
|
||
extern rtx emit_jump_insn PROTO((rtx));
|
||
extern rtx emit_call_insn PROTO((rtx));
|
||
extern rtx emit_label PROTO((rtx));
|
||
extern rtx emit_barrier PROTO((void));
|
||
extern rtx emit_line_note PROTO((char *, int));
|
||
extern rtx emit_note PROTO((char *, int));
|
||
extern rtx emit_line_note_force PROTO((char *, int));
|
||
extern rtx make_insn_raw PROTO((rtx));
|
||
extern rtx previous_insn PROTO((rtx));
|
||
extern rtx next_insn PROTO((rtx));
|
||
extern rtx prev_nonnote_insn PROTO((rtx));
|
||
extern rtx next_nonnote_insn PROTO((rtx));
|
||
extern rtx prev_real_insn PROTO((rtx));
|
||
extern rtx next_real_insn PROTO((rtx));
|
||
extern rtx prev_active_insn PROTO((rtx));
|
||
extern rtx next_active_insn PROTO((rtx));
|
||
extern rtx prev_label PROTO((rtx));
|
||
extern rtx next_label PROTO((rtx));
|
||
extern rtx next_cc0_user PROTO((rtx));
|
||
extern rtx prev_cc0_setter PROTO((rtx));
|
||
extern rtx next_nondeleted_insn PROTO((rtx));
|
||
extern enum rtx_code reverse_condition PROTO((enum rtx_code));
|
||
extern enum rtx_code swap_condition PROTO((enum rtx_code));
|
||
extern enum rtx_code unsigned_condition PROTO((enum rtx_code));
|
||
extern enum rtx_code signed_condition PROTO((enum rtx_code));
|
||
extern rtx find_equiv_reg PROTO((rtx, rtx, enum reg_class, int, short *, int, enum machine_mode));
|
||
extern rtx squeeze_notes PROTO((rtx, rtx));
|
||
extern rtx delete_insn PROTO((rtx));
|
||
extern void delete_jump PROTO((rtx));
|
||
extern rtx get_label_before PROTO((rtx));
|
||
extern rtx get_label_after PROTO((rtx));
|
||
extern rtx follow_jumps PROTO((rtx));
|
||
extern rtx adj_offsettable_operand PROTO((rtx, int));
|
||
extern rtx try_split PROTO((rtx, rtx, int));
|
||
extern rtx split_insns PROTO((rtx, rtx));
|
||
extern rtx simplify_unary_operation PROTO((enum rtx_code, enum machine_mode, rtx, enum machine_mode));
|
||
extern rtx simplify_binary_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx));
|
||
extern rtx simplify_ternary_operation PROTO((enum rtx_code, enum machine_mode, enum machine_mode, rtx, rtx, rtx));
|
||
extern rtx simplify_relational_operation PROTO((enum rtx_code, enum machine_mode, rtx, rtx));
|
||
extern rtx gen_move_insn PROTO((rtx, rtx));
|
||
extern rtx gen_jump PROTO((rtx));
|
||
extern rtx gen_beq PROTO((rtx));
|
||
extern rtx gen_bge PROTO((rtx));
|
||
extern rtx gen_ble PROTO((rtx));
|
||
extern rtx gen_mem_addressof PROTO((rtx, union tree_node *));
|
||
extern rtx eliminate_constant_term PROTO((rtx, rtx *));
|
||
extern rtx expand_complex_abs PROTO((enum machine_mode, rtx, rtx, int));
|
||
extern enum machine_mode choose_hard_reg_mode PROTO((int, int));
|
||
extern void set_unique_reg_note PROTO((rtx, enum reg_note, rtx));
|
||
|
||
/* Functions in rtlanal.c */
|
||
|
||
extern int rtx_unstable_p PROTO((rtx));
|
||
extern int rtx_varies_p PROTO((rtx));
|
||
extern int rtx_addr_varies_p PROTO((rtx));
|
||
extern HOST_WIDE_INT get_integer_term PROTO((rtx));
|
||
extern rtx get_related_value PROTO((rtx));
|
||
extern int reg_mentioned_p PROTO((rtx, rtx));
|
||
extern int reg_referenced_p PROTO((rtx, rtx));
|
||
extern int reg_used_between_p PROTO((rtx, rtx, rtx));
|
||
extern int reg_referenced_between_p PROTO((rtx, rtx, rtx));
|
||
extern int reg_set_between_p PROTO((rtx, rtx, rtx));
|
||
extern int regs_set_between_p PROTO((rtx, rtx, rtx));
|
||
extern int modified_between_p PROTO((rtx, rtx, rtx));
|
||
extern int no_labels_between_p PROTO((rtx, rtx));
|
||
extern int no_jumps_between_p PROTO((rtx, rtx));
|
||
extern int modified_in_p PROTO((rtx, rtx));
|
||
extern int reg_set_p PROTO((rtx, rtx));
|
||
extern rtx single_set PROTO((rtx));
|
||
extern int multiple_sets PROTO((rtx));
|
||
extern rtx find_last_value PROTO((rtx, rtx *, rtx, int));
|
||
extern int refers_to_regno_p PROTO((int, int, rtx, rtx *));
|
||
extern int reg_overlap_mentioned_p PROTO((rtx, rtx));
|
||
extern void note_stores PROTO((rtx, void (*)(rtx, rtx)));
|
||
extern rtx reg_set_last PROTO((rtx, rtx));
|
||
extern int rtx_equal_p PROTO((rtx, rtx));
|
||
extern int dead_or_set_p PROTO((rtx, rtx));
|
||
extern int dead_or_set_regno_p PROTO((rtx, int));
|
||
extern rtx find_reg_note PROTO((rtx, enum reg_note, rtx));
|
||
extern rtx find_regno_note PROTO((rtx, enum reg_note, int));
|
||
extern int find_reg_fusage PROTO((rtx, enum rtx_code, rtx));
|
||
extern int find_regno_fusage PROTO((rtx, enum rtx_code, int));
|
||
extern void remove_note PROTO((rtx, rtx));
|
||
extern int side_effects_p PROTO((rtx));
|
||
extern int volatile_refs_p PROTO((rtx));
|
||
extern int volatile_insn_p PROTO((rtx));
|
||
extern int may_trap_p PROTO((rtx));
|
||
extern int inequality_comparisons_p PROTO ((rtx));
|
||
extern rtx replace_rtx PROTO((rtx, rtx, rtx));
|
||
extern rtx replace_regs PROTO((rtx, rtx *, int, int));
|
||
extern int computed_jump_p PROTO((rtx));
|
||
typedef int (*rtx_function) PROTO((rtx *, void *));
|
||
extern int for_each_rtx PROTO((rtx *, rtx_function, void *));
|
||
extern rtx regno_use_in PROTO((int, rtx));
|
||
extern int auto_inc_p PROTO((rtx));
|
||
extern void remove_node_from_expr_list PROTO((rtx, rtx *));
|
||
extern int insns_safe_to_move_p PROTO((rtx, rtx, rtx *));
|
||
|
||
/* flow.c */
|
||
|
||
extern rtx find_use_as_address PROTO((rtx, rtx, HOST_WIDE_INT));
|
||
|
||
/* regclass.c */
|
||
|
||
/* Maximum number of parallel sets and clobbers in any insn in this fn.
|
||
Always at least 3, since the combiner could put that many togetherm
|
||
and we want this to remain correct for all the remaining passes. */
|
||
|
||
extern int max_parallel;
|
||
|
||
/* Free up register info memory. */
|
||
extern void free_reg_info PROTO((void));
|
||
|
||
/* recog.c */
|
||
extern int asm_noperands PROTO((rtx));
|
||
extern char *decode_asm_operands PROTO((rtx, rtx *, rtx **,
|
||
const char **,
|
||
enum machine_mode *));
|
||
|
||
extern enum reg_class reg_preferred_class PROTO((int));
|
||
extern enum reg_class reg_alternate_class PROTO((int));
|
||
|
||
extern rtx get_first_nonparm_insn PROTO((void));
|
||
|
||
extern void split_block_insns PROTO((int, int));
|
||
extern void update_flow_info PROTO((rtx, rtx, rtx, rtx));
|
||
|
||
/* Standard pieces of rtx, to be substituted directly into things. */
|
||
#define pc_rtx (&global_rtl.pc_val)
|
||
#define cc0_rtx (&global_rtl.cc0_val)
|
||
|
||
#define MAX_SAVED_CONST_INT 64
|
||
extern struct rtx_def const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
|
||
|
||
#define const0_rtx (&const_int_rtx[MAX_SAVED_CONST_INT])
|
||
#define const1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+1])
|
||
#define const2_rtx (&const_int_rtx[MAX_SAVED_CONST_INT+2])
|
||
#define constm1_rtx (&const_int_rtx[MAX_SAVED_CONST_INT-1])
|
||
extern rtx const_true_rtx;
|
||
|
||
extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
|
||
|
||
/* Returns a constant 0 rtx in mode MODE. Integer modes are treated the
|
||
same as VOIDmode. */
|
||
|
||
#define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
|
||
|
||
/* Likewise, for the constants 1 and 2. */
|
||
|
||
#define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
|
||
#define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
|
||
|
||
extern struct _global_rtl
|
||
{
|
||
struct rtx_def pc_val, cc0_val;
|
||
struct rtx_def stack_pointer_val, frame_pointer_val;
|
||
struct rtx_def hard_frame_pointer_val;
|
||
struct rtx_def arg_pointer_val;
|
||
struct rtx_def virtual_incoming_args_val;
|
||
struct rtx_def virtual_stack_vars_val;
|
||
struct rtx_def virtual_stack_dynamic_val;
|
||
struct rtx_def virtual_outgoing_args_val;
|
||
struct rtx_def virtual_cfa_val;
|
||
} global_rtl;
|
||
|
||
/* All references to certain hard regs, except those created
|
||
by allocating pseudo regs into them (when that's possible),
|
||
go through these unique rtx objects. */
|
||
#define stack_pointer_rtx (&global_rtl.stack_pointer_val)
|
||
#define frame_pointer_rtx (&global_rtl.frame_pointer_val)
|
||
|
||
extern rtx pic_offset_table_rtx;
|
||
extern rtx struct_value_rtx;
|
||
extern rtx struct_value_incoming_rtx;
|
||
extern rtx static_chain_rtx;
|
||
extern rtx static_chain_incoming_rtx;
|
||
extern rtx return_address_pointer_rtx;
|
||
|
||
/* Include the RTL generation functions. */
|
||
|
||
#ifndef NO_GENRTL_H
|
||
#include "genrtl.h"
|
||
#endif
|
||
|
||
/* There are some RTL codes that require special attention; the
|
||
generation functions included above do the raw handling. If you
|
||
add to this list, modify special_rtx in gengenrtl.c as well. You
|
||
should also modify gen_rtx to use the special function. */
|
||
|
||
extern rtx gen_rtx_CONST_DOUBLE PROTO((enum machine_mode, rtx,
|
||
HOST_WIDE_INT, HOST_WIDE_INT));
|
||
extern rtx gen_rtx_CONST_INT PROTO((enum machine_mode, HOST_WIDE_INT));
|
||
extern rtx gen_rtx_REG PROTO((enum machine_mode, int));
|
||
extern rtx gen_rtx_MEM PROTO((enum machine_mode, rtx));
|
||
|
||
/* We need the cast here to ensure that we get the same result both with
|
||
and without prototypes. */
|
||
#define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N))
|
||
|
||
|
||
/* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
|
||
is used to represent the frame pointer. This is because the
|
||
hard frame pointer and the automatic variables are separated by an amount
|
||
that cannot be determined until after register allocation. We can assume
|
||
that in this case ELIMINABLE_REGS will be defined, one action of which
|
||
will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */
|
||
#ifndef HARD_FRAME_POINTER_REGNUM
|
||
#define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
|
||
#endif
|
||
|
||
/* For register elimination to work properly these hard_frame_pointer_rtx,
|
||
frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
|
||
the same register. */
|
||
#if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
|
||
#define hard_frame_pointer_rtx (&global_rtl.frame_pointer_val)
|
||
#else
|
||
#define hard_frame_pointer_rtx (&global_rtl.hard_frame_pointer_val)
|
||
#endif
|
||
|
||
#if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
|
||
#define arg_pointer_rtx (&global_rtl.frame_pointer_val)
|
||
#else
|
||
#if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
|
||
#define arg_pointer_rtx (&global_rtl.hard_frame_pointer_val)
|
||
#else
|
||
#define arg_pointer_rtx (&global_rtl.arg_pointer_val)
|
||
#endif
|
||
#endif
|
||
|
||
/* Virtual registers are used during RTL generation to refer to locations into
|
||
the stack frame when the actual location isn't known until RTL generation
|
||
is complete. The routine instantiate_virtual_regs replaces these with
|
||
the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
|
||
a constant. */
|
||
|
||
#define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER)
|
||
|
||
/* This points to the first word of the incoming arguments passed on the stack,
|
||
either by the caller or by the callee when pretending it was passed by the
|
||
caller. */
|
||
|
||
#define virtual_incoming_args_rtx (&global_rtl.virtual_incoming_args_val)
|
||
|
||
#define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER)
|
||
|
||
/* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
|
||
variable on the stack. Otherwise, it points to the first variable on
|
||
the stack. */
|
||
|
||
#define virtual_stack_vars_rtx (&global_rtl.virtual_stack_vars_val)
|
||
|
||
#define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1)
|
||
|
||
/* This points to the location of dynamically-allocated memory on the stack
|
||
immediately after the stack pointer has been adjusted by the amount
|
||
desired. */
|
||
|
||
#define virtual_stack_dynamic_rtx (&global_rtl.virtual_stack_dynamic_val)
|
||
|
||
#define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2)
|
||
|
||
/* This points to the location in the stack at which outgoing arguments should
|
||
be written when the stack is pre-pushed (arguments pushed using push
|
||
insns always use sp). */
|
||
|
||
#define virtual_outgoing_args_rtx (&global_rtl.virtual_outgoing_args_val)
|
||
|
||
#define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3)
|
||
|
||
/* This points to the Canonical Frame Address of the function. This
|
||
should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
|
||
but is calculated relative to the arg pointer for simplicity; the
|
||
frame pointer nor stack pointer are necessarily fixed relative to
|
||
the CFA until after reload. */
|
||
|
||
#define virtual_cfa_rtx (&global_rtl.virtual_cfa_val)
|
||
|
||
#define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4)
|
||
|
||
#define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4)
|
||
|
||
extern rtx find_next_ref PROTO((rtx, rtx));
|
||
extern rtx *find_single_use PROTO((rtx, rtx, rtx *));
|
||
|
||
extern rtx output_constant_def PROTO((union tree_node *));
|
||
extern rtx immed_real_const PROTO((union tree_node *));
|
||
extern union tree_node *make_tree PROTO((union tree_node *, rtx));
|
||
|
||
/* Define a default value for STORE_FLAG_VALUE. */
|
||
|
||
#ifndef STORE_FLAG_VALUE
|
||
#define STORE_FLAG_VALUE 1
|
||
#endif
|
||
|
||
/* Nonzero after the second flow pass has completed.
|
||
Set to 1 or 0 by toplev.c */
|
||
extern int flow2_completed;
|
||
|
||
/* Nonzero after end of reload pass.
|
||
Set to 1 or 0 by reload1.c. */
|
||
|
||
extern int reload_completed;
|
||
|
||
/* Set to 1 while reload_as_needed is operating.
|
||
Required by some machines to handle any generated moves differently. */
|
||
|
||
extern int reload_in_progress;
|
||
|
||
/* If this is nonzero, we do not bother generating VOLATILE
|
||
around volatile memory references, and we are willing to
|
||
output indirect addresses. If cse is to follow, we reject
|
||
indirect addresses so a useful potential cse is generated;
|
||
if it is used only once, instruction combination will produce
|
||
the same indirect address eventually. */
|
||
extern int cse_not_expected;
|
||
|
||
/* Set to nonzero before life analysis to indicate that it is unsafe to
|
||
generate any new pseudo registers. */
|
||
extern int no_new_pseudos;
|
||
|
||
/* Indexed by pseudo register number, gives the rtx for that pseudo.
|
||
Allocated in parallel with regno_pointer_flag. */
|
||
extern rtx *regno_reg_rtx;
|
||
|
||
/* Vector indexed by regno; contain the alignment in bytes and type
|
||
pointed to for a register that contains a pointer, if known. */
|
||
extern char *regno_pointer_align;
|
||
#define REGNO_POINTER_ALIGN(REGNO) regno_pointer_align[REGNO]
|
||
|
||
/* Translates rtx code to tree code, for those codes needed by
|
||
REAL_ARITHMETIC. The function returns an int because the caller may not
|
||
know what `enum tree_code' means. */
|
||
|
||
extern int rtx_to_tree_code PROTO((enum rtx_code));
|
||
|
||
/* In tree.c */
|
||
extern void obfree PROTO ((char *));
|
||
struct obstack;
|
||
extern void gcc_obstack_init PROTO ((struct obstack *));
|
||
extern void pop_obstacks PROTO ((void));
|
||
extern void push_obstacks PROTO ((struct obstack *,
|
||
struct obstack *));
|
||
#ifdef BUFSIZ
|
||
extern int read_skip_spaces PROTO ((FILE *));
|
||
#endif
|
||
|
||
/* In cse.c */
|
||
struct cse_basic_block_data;
|
||
extern int rtx_cost PROTO ((rtx, enum rtx_code));
|
||
extern void delete_trivially_dead_insns PROTO ((rtx, int));
|
||
#ifdef BUFSIZ
|
||
extern int cse_main PROTO ((rtx, int, int, FILE *));
|
||
#endif
|
||
extern void cse_end_of_basic_block PROTO ((rtx,
|
||
struct cse_basic_block_data *,
|
||
int, int, int));
|
||
|
||
/* In jump.c */
|
||
extern int comparison_dominates_p PROTO ((enum rtx_code, enum rtx_code));
|
||
extern int condjump_p PROTO ((rtx));
|
||
extern rtx condjump_label PROTO ((rtx));
|
||
extern int simplejump_p PROTO ((rtx));
|
||
extern int returnjump_p PROTO ((rtx));
|
||
extern int sets_cc0_p PROTO ((rtx));
|
||
extern int invert_jump PROTO ((rtx, rtx));
|
||
extern int rtx_renumbered_equal_p PROTO ((rtx, rtx));
|
||
extern int true_regnum PROTO ((rtx));
|
||
extern int redirect_jump PROTO ((rtx, rtx));
|
||
extern void jump_optimize PROTO ((rtx, int, int, int));
|
||
extern void rebuild_jump_labels PROTO ((rtx));
|
||
extern void thread_jumps PROTO ((rtx, int, int));
|
||
extern int redirect_exp PROTO ((rtx *, rtx, rtx, rtx));
|
||
extern int rtx_equal_for_thread_p PROTO ((rtx, rtx, rtx));
|
||
extern int invert_exp PROTO ((rtx, rtx));
|
||
extern int can_reverse_comparison_p PROTO ((rtx, rtx));
|
||
extern void delete_for_peephole PROTO ((rtx, rtx));
|
||
extern int condjump_in_parallel_p PROTO ((rtx));
|
||
|
||
/* Flags for jump_optimize() */
|
||
#define JUMP_CROSS_JUMP 1
|
||
#define JUMP_NOOP_MOVES 1
|
||
#define JUMP_AFTER_REGSCAN 1
|
||
|
||
/* In emit-rtl.c. */
|
||
extern int max_reg_num PROTO ((void));
|
||
extern int max_label_num PROTO ((void));
|
||
extern int get_first_label_num PROTO ((void));
|
||
extern void delete_insns_since PROTO ((rtx));
|
||
extern void mark_reg_pointer PROTO ((rtx, int));
|
||
extern void mark_user_reg PROTO ((rtx));
|
||
extern void reset_used_flags PROTO ((rtx));
|
||
extern void reorder_insns PROTO ((rtx, rtx, rtx));
|
||
extern int get_max_uid PROTO ((void));
|
||
extern int in_sequence_p PROTO ((void));
|
||
extern void force_next_line_note PROTO ((void));
|
||
extern void init_emit PROTO ((void));
|
||
extern void init_emit_once PROTO ((int));
|
||
extern void push_topmost_sequence PROTO ((void));
|
||
extern void pop_topmost_sequence PROTO ((void));
|
||
extern int subreg_realpart_p PROTO ((rtx));
|
||
extern void reverse_comparison PROTO ((rtx));
|
||
extern void set_new_first_and_last_insn PROTO ((rtx, rtx));
|
||
extern void set_new_first_and_last_label_num PROTO ((int, int));
|
||
extern void unshare_all_rtl_again PROTO ((rtx));
|
||
extern void set_last_insn PROTO ((rtx));
|
||
extern void link_cc0_insns PROTO ((rtx));
|
||
extern void add_insn PROTO ((rtx));
|
||
extern void add_insn_before PROTO ((rtx, rtx));
|
||
extern void add_insn_after PROTO ((rtx, rtx));
|
||
extern void remove_insn PROTO ((rtx));
|
||
extern void reorder_insns_with_line_notes PROTO ((rtx, rtx, rtx));
|
||
extern void emit_insn_after_with_line_notes PROTO ((rtx, rtx, rtx));
|
||
extern enum rtx_code classify_insn PROTO ((rtx));
|
||
extern void init_virtual_regs PROTO ((void));
|
||
extern rtx emit PROTO ((rtx));
|
||
/* Query and clear/ restore no_line_numbers. This is used by the
|
||
switch / case handling in stmt.c to give proper line numbers in
|
||
warnings about unreachable code. */
|
||
int force_line_numbers PROTO((void));
|
||
void restore_line_number_status PROTO((int old_value));
|
||
|
||
/* In insn-emit.c */
|
||
extern void add_clobbers PROTO ((rtx, int));
|
||
|
||
/* In combine.c */
|
||
extern void combine_instructions PROTO ((rtx, int));
|
||
extern int extended_count PROTO ((rtx, enum machine_mode, int));
|
||
extern rtx remove_death PROTO ((int, rtx));
|
||
#ifdef BUFSIZ
|
||
extern void dump_combine_stats PROTO ((FILE *));
|
||
extern void dump_combine_total_stats PROTO ((FILE *));
|
||
#endif
|
||
|
||
/* In sched.c. */
|
||
#ifdef BUFSIZ
|
||
extern void schedule_insns PROTO ((FILE *));
|
||
#endif
|
||
#ifdef HAIFA
|
||
extern void fix_sched_param PROTO ((char *, char *));
|
||
#endif
|
||
|
||
/* In print-rtl.c */
|
||
extern void debug_rtx PROTO ((rtx));
|
||
extern void debug_rtx_list PROTO ((rtx, int));
|
||
extern rtx debug_rtx_find PROTO ((rtx, int));
|
||
#ifdef BUFSIZ
|
||
extern void print_rtl PROTO ((FILE *, rtx));
|
||
extern int print_rtl_single PROTO ((FILE *, rtx));
|
||
extern void print_inline_rtx PROTO ((FILE *, rtx, int));
|
||
#endif
|
||
|
||
/* In loop.c */
|
||
extern void init_loop PROTO ((void));
|
||
extern rtx libcall_other_reg PROTO ((rtx, rtx));
|
||
#ifdef BUFSIZ
|
||
extern void loop_optimize PROTO ((rtx, FILE *, int, int));
|
||
#endif
|
||
extern void record_excess_regs PROTO ((rtx, rtx, rtx *));
|
||
|
||
/* In function.c */
|
||
extern void reposition_prologue_and_epilogue_notes PROTO ((rtx));
|
||
extern void thread_prologue_and_epilogue_insns PROTO ((rtx));
|
||
extern void use_variable PROTO ((rtx));
|
||
extern HOST_WIDE_INT get_frame_size PROTO ((void));
|
||
extern void preserve_rtl_expr_result PROTO ((rtx));
|
||
extern void mark_temp_addr_taken PROTO ((rtx));
|
||
extern void update_temp_slot_address PROTO ((rtx, rtx));
|
||
extern void use_variable_after PROTO ((rtx, rtx));
|
||
extern void purge_addressof PROTO ((rtx));
|
||
|
||
/* In reload.c */
|
||
extern int operands_match_p PROTO ((rtx, rtx));
|
||
extern int safe_from_earlyclobber PROTO ((rtx, rtx));
|
||
|
||
/* In stmt.c */
|
||
extern void expand_null_return PROTO((void));
|
||
extern void emit_jump PROTO ((rtx));
|
||
extern int preserve_subexpressions_p PROTO ((void));
|
||
|
||
/* List (chain of EXPR_LIST) of labels heading the current handlers for
|
||
nonlocal gotos. */
|
||
extern rtx nonlocal_goto_handler_labels;
|
||
|
||
/* In expr.c */
|
||
extern void init_expr_once PROTO ((void));
|
||
extern void move_by_pieces PROTO ((rtx, rtx, int, int));
|
||
|
||
|
||
/* In stupid.c */
|
||
#ifdef BUFSIZ
|
||
extern void stupid_life_analysis PROTO ((rtx, int, FILE *));
|
||
#endif
|
||
|
||
/* In flow.c */
|
||
extern void allocate_bb_life_data PROTO ((void));
|
||
extern void allocate_reg_life_data PROTO ((void));
|
||
extern void recompute_reg_usage PROTO ((rtx, int));
|
||
#ifdef BUFSIZ
|
||
extern void dump_flow_info PROTO ((FILE *));
|
||
#endif
|
||
extern void free_bb_mem PROTO ((void));
|
||
|
||
/* In expmed.c */
|
||
extern void init_expmed PROTO ((void));
|
||
extern void expand_inc PROTO ((rtx, rtx));
|
||
extern void expand_dec PROTO ((rtx, rtx));
|
||
extern rtx expand_mult_highpart PROTO ((enum machine_mode, rtx,
|
||
unsigned HOST_WIDE_INT, rtx,
|
||
int, int));
|
||
|
||
/* In gcse.c */
|
||
#ifdef BUFSIZ
|
||
extern int gcse_main PROTO ((rtx, FILE *));
|
||
#endif
|
||
|
||
/* In global.c */
|
||
extern void mark_elimination PROTO ((int, int));
|
||
#ifdef BUFSIZ
|
||
extern int global_alloc PROTO ((FILE *));
|
||
extern void dump_global_regs PROTO ((FILE *));
|
||
#endif
|
||
#ifdef HARD_CONST
|
||
extern void retry_global_alloc PROTO ((int, HARD_REG_SET));
|
||
#endif
|
||
|
||
/* In regclass.c */
|
||
extern int reg_classes_intersect_p PROTO ((enum reg_class, enum reg_class));
|
||
extern int reg_class_subset_p PROTO ((enum reg_class, enum reg_class));
|
||
extern void globalize_reg PROTO ((int));
|
||
extern void init_regs PROTO ((void));
|
||
extern void init_reg_sets PROTO ((void));
|
||
extern void regset_release_memory PROTO ((void));
|
||
extern void regclass_init PROTO ((void));
|
||
extern void regclass PROTO ((rtx, int));
|
||
extern void reg_scan PROTO ((rtx, int, int));
|
||
extern void reg_scan_update PROTO ((rtx, rtx, int));
|
||
extern void fix_register PROTO ((char *, int, int));
|
||
|
||
/* In regmove.c */
|
||
#ifdef BUFSIZ
|
||
extern void regmove_optimize PROTO ((rtx, int, FILE *));
|
||
#endif
|
||
|
||
/* In reorg.c */
|
||
#ifdef BUFSIZ
|
||
extern void dbr_schedule PROTO ((rtx, FILE *));
|
||
#endif
|
||
|
||
/* In optabs.c */
|
||
extern void init_optabs PROTO ((void));
|
||
|
||
/* In local-alloc.c */
|
||
#ifdef BUFSIZ
|
||
extern void dump_local_alloc PROTO ((FILE *));
|
||
#endif
|
||
extern int local_alloc PROTO ((void));
|
||
extern int function_invariant_p PROTO ((rtx));
|
||
|
||
/* In reload1.c */
|
||
extern void reload_cse_regs PROTO ((rtx));
|
||
extern void init_reload PROTO ((void));
|
||
extern void mark_home_live PROTO ((int));
|
||
#ifdef BUFSIZ
|
||
extern int reload PROTO ((rtx, int, FILE *));
|
||
#endif
|
||
|
||
/* In caller-save.c */
|
||
extern void init_caller_save PROTO ((void));
|
||
|
||
/* In profile.c */
|
||
extern void init_branch_prob PROTO ((const char *));
|
||
#ifdef BUFSIZ
|
||
extern void branch_prob PROTO ((rtx, FILE *));
|
||
extern void end_branch_prob PROTO ((FILE *));
|
||
#endif
|
||
extern void output_func_start_profiler PROTO ((void));
|
||
|
||
/* In reg-stack.c */
|
||
#ifdef BUFSIZ
|
||
extern void reg_to_stack PROTO ((rtx, FILE *));
|
||
#endif
|
||
extern int stack_regs_mentioned_p PROTO ((rtx));
|
||
|
||
/* In fold-const.c */
|
||
extern int add_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
|
||
HOST_WIDE_INT, HOST_WIDE_INT,
|
||
HOST_WIDE_INT *, HOST_WIDE_INT *));
|
||
extern int neg_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
|
||
HOST_WIDE_INT *, HOST_WIDE_INT *));
|
||
extern int mul_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
|
||
HOST_WIDE_INT, HOST_WIDE_INT,
|
||
HOST_WIDE_INT *, HOST_WIDE_INT *));
|
||
extern void lshift_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
|
||
HOST_WIDE_INT, int, HOST_WIDE_INT *,
|
||
HOST_WIDE_INT *, int));
|
||
extern void rshift_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
|
||
HOST_WIDE_INT, int,
|
||
HOST_WIDE_INT *, HOST_WIDE_INT *, int));
|
||
extern void lrotate_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
|
||
HOST_WIDE_INT, int, HOST_WIDE_INT *,
|
||
HOST_WIDE_INT *));
|
||
extern void rrotate_double PROTO ((HOST_WIDE_INT, HOST_WIDE_INT,
|
||
HOST_WIDE_INT, int, HOST_WIDE_INT *,
|
||
HOST_WIDE_INT *));
|
||
|
||
/* In calls.c */
|
||
/* Emit library call. */
|
||
extern void emit_library_call PVPROTO ((rtx, int, enum machine_mode,
|
||
int, ...));
|
||
extern rtx emit_library_call_value PVPROTO((rtx, rtx, int,
|
||
enum machine_mode,
|
||
int, ...));
|
||
|
||
/* In unroll.c */
|
||
extern int set_dominates_use PROTO ((int, int, int, rtx, rtx));
|
||
|
||
/* In varasm.c */
|
||
extern void bss_section PROTO ((void));
|
||
extern int in_data_section PROTO ((void));
|
||
extern int supports_one_only PROTO ((void));
|
||
|
||
/* In rtl.c */
|
||
extern void init_rtl PROTO ((void));
|
||
extern void rtx_free PROTO ((rtx));
|
||
|
||
/* In alias.c */
|
||
extern int true_dependence PROTO ((rtx, enum machine_mode, rtx,
|
||
int (*)(rtx)));
|
||
extern int read_dependence PROTO ((rtx, rtx));
|
||
extern int anti_dependence PROTO ((rtx, rtx));
|
||
extern int output_dependence PROTO ((rtx, rtx));
|
||
extern void init_alias_once PROTO ((void));
|
||
extern void init_alias_analysis PROTO ((void));
|
||
extern void end_alias_analysis PROTO ((void));
|
||
|
||
extern void record_base_value PROTO ((int, rtx, int));
|
||
extern void record_alias_subset PROTO ((int, int));
|
||
extern rtx addr_side_effect_eval PROTO ((rtx, int, int));
|
||
|
||
#ifdef STACK_REGS
|
||
extern int stack_regs_mentioned PROTO((rtx insn));
|
||
#endif
|
||
|
||
#endif /* _RTL_H */
|