genconditions.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 genconditions.cc:

Functions
static void	write_header (void)
static void	write_conditions (void)
static int	write_one_condition (void **, void *)
static int	write_one_condition (void **slot, void *ARG_UNUSED(dummy))
static void	write_writer (void)
int	main (int argc, const char **argv)

Variables
static int	saw_eh_return

Function Documentation

main()

int main	(	int	argc,
		const char **	argv )

References add_c_test(), md_rtx_info::def, FATAL_EXIT_CODE, get_c_test(), GET_CODE, init_rtx_reader_args(), progname, read_md_rtx(), saw_eh_return, SUCCESS_EXIT_CODE, write_conditions(), write_header(), write_writer(), and XSTR.

write_conditions()

static void write_conditions ( void )

static

Write out the complete conditions table, its size, and a flag
indicating that gensupport.cc can now do insn elision.   

References traverse_c_tests(), and write_one_condition().

Referenced by main().

write_header()

static void write_header ( void )

static

Generate the header for insn-conditions.c.   

References saw_eh_return.

Referenced by main(), main(), and open_outfile().

write_one_condition() [1/2]

static int write_one_condition ( void ** , void *  )

static

Referenced by write_conditions().

write_one_condition() [2/2]

static int write_one_condition ( void ** slot, void * ARG_UNUSEDdummy )

static

Write out one entry in the conditions table, using the data pointed
to by SLOT.  Each entry looks like this:

{ "! optimize_size && ! TARGET_READ_MODIFY_WRITE",
  __builtin_constant_p (! optimize_size && ! TARGET_READ_MODIFY_WRITE)
  ? (int) (! optimize_size && ! TARGET_READ_MODIFY_WRITE)
  : -1) },   

References c_test::expr, md_reader::print_c_condition(), md_reader::print_md_ptr_loc(), and rtx_reader_ptr.

write_writer()

static void write_writer ( void )

static

Emit code which will convert the C-format table to a
(define_conditions) form, which the MD reader can understand.
The result will be added to the set of files scanned by
'downstream' generators.   

Referenced by main().

Variable Documentation

saw_eh_return

int saw_eh_return

static

Process machine description and calculate constant conditions.
Copyright (C) 2001-2024 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 version.

GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.   

In a machine description, all of the insn patterns - define_insn,
define_expand, define_split, define_peephole, define_peephole2 -
contain an optional C expression which makes the final decision
about whether or not this pattern is usable.  That expression may
turn out to be always false when the compiler is built.  If it is,
most of the programs that generate code from the machine
description can simply ignore the entire pattern.   

so we can include except.h in the generated file.   

Referenced by main(), and write_header().