GCC Middle and Back End API Reference
genextract.cc File Reference
#include "bconfig.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "rtl.h"
#include "errors.h"
#include "read-md.h"
#include "gensupport.h"
Include dependency graph for genextract.cc:

Data Structures

struct  extraction
struct  code_ptr
class  accum_extract


#define UPPER_OFFSET   ('A' - ('z' - 'a' + 1))


typedef char * locstr


static void walk_rtx (md_rtx_info *, rtx, class accum_extract *)
static void push_pathstr_operand (int operand, bool is_vector, class accum_extract *acc)
static void gen_insn (md_rtx_info *info)
static void VEC_safe_set_locstr (md_rtx_info *info, vec< locstr > *vp, unsigned int ix, char *str)
static char * VEC_char_to_string (const vec< char > &v)
static void print_path (const char *path)
static void print_header (void)
int main (int argc, const char **argv)


static struct extractionextractions
static struct code_ptrpeepholes

Macro Definition Documentation


#define UPPER_OFFSET   ('A' - ('z' - 'a' + 1))

Referenced by print_path(), and push_pathstr_operand().

Typedef Documentation

◆ locstr

typedef char* locstr
Generate code from machine description to extract operands from insn as rtl.
   Copyright (C) 1987-2024 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
This structure contains all the information needed to describe one
set of extractions methods.  Each method may be used by more than
one pattern if the operands are in the same place.

The string for each operand describes that path to the operand and
contains `0' through `9' when going into an expression and `a' through
`z' then 'A' through to 'Z' when going into a vector.  We assume here that
only the first operand of an rtl expression is a vector.  genrecog.cc makes
the same assumption (and uses the same representation) and it is currently

Function Documentation

◆ gen_insn()

◆ main()

◆ print_header()

static void print_header ( void )

Referenced by main().

◆ print_path()

static void print_path ( const char * path)
Given a PATH, representing a path down the instruction's
pattern from the root to a certain point, output code to
evaluate to the rtx at that point.   

References gcc_unreachable, i, and UPPER_OFFSET.

Referenced by main().

◆ push_pathstr_operand()

static void push_pathstr_operand ( int operand,
bool is_vector,
class accum_extract * acc )
Convert integer OPERAND into a character - either into [a-zA-Z] for vector
operands or [0-9] for integer operands - and push onto the end of the path
in ACC.   

References accum_extract::pathstr, and UPPER_OFFSET.

Referenced by gen_insn(), and walk_rtx().

◆ VEC_char_to_string()

static char * VEC_char_to_string ( const vec< char > & v)
Another helper subroutine of walk_rtx: given a vec<char>, convert it
to a NUL-terminated string in malloc memory.   

Referenced by walk_rtx().

◆ VEC_safe_set_locstr()

static void VEC_safe_set_locstr ( md_rtx_info * info,
vec< locstr > * vp,
unsigned int ix,
char * str )
Helper subroutine of walk_rtx: given a vec<locstr>, an index, and a
string, insert the string at the index, which should either already
exist and be NULL, or not yet exist within the vector.  In the latter
case the vector is enlarged as appropriate.  INFO describes the
containing define_* expression.   

References have_error, md_rtx_info::loc, message_at(), and NULL.

Referenced by walk_rtx().

◆ walk_rtx()

Variable Documentation

◆ extractions

struct extraction* extractions
All extractions needed for this machine description.   

Referenced by gen_insn(), and main().

◆ peepholes

struct code_ptr* peepholes
All insn codes for old-style peepholes.   

Referenced by main().