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/* params.def - Run-time parameters.
Copyright (C) 2001 Free Software Foundation, Inc.
Written by Mark Mitchell <mark@codesourcery.com>.
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/* This file contains definitions for language-independent
parameters. The DEFPARAM macro takes 4 arguments:
- The enumeral corresponding to this parameter.
- The name that can be used to set this parameter using the
command-line option `--param <name>=<value>'.
- A help string explaining how the parameter is used.
- A default value for the parameter.
Be sure to add an entry to invoke.texi summarizing the parameter. */
/* The maximum number of instructions accepted for inlining a
function. Increasing values mean more agressive inlining.
This affects currently only functions explicitly marked as
inline (or methods defined within the class definition for C++).
The original default value of 10000 was arbitrary and caused
significant compile-time performance regressions. */
DEFPARAM (PARAM_MAX_INLINE_INSNS,
"max-inline-insns",
"The maximum number of instructions in a function that is eligible for inlining",
600)
/* The maximum number of instructions to consider when looking for an
instruction to fill a delay slot. If more than this arbitrary
number of instructions is searched, the time savings from filling
the delay slot will be minimal so stop searching. Increasing
values mean more aggressive optimization, making the compile time
increase with probably small improvement in executable run time. */
DEFPARAM (PARAM_MAX_DELAY_SLOT_INSN_SEARCH,
"max-delay-slot-insn-search",
"The maximum number of instructions to consider to fill a delay slot",
100)
/* When trying to fill delay slots, the maximum number of instructions
to consider when searching for a block with valid live register
information. Increasing this arbitrarily chosen value means more
aggressive optimization, increasing the compile time. This
parameter should be removed when the delay slot code is rewritten
to maintain the control-flow graph. */
DEFPARAM(PARAM_MAX_DELAY_SLOT_LIVE_SEARCH,
"max-delay-slot-live-search",
"The maximum number of instructions to consider to find accurate live register information",
333)
/* This parameter limits the number of branch elements that the
scheduler will track anti-dependancies through without resetting
the tracking mechanism. Large functions with few calls or barriers
can generate lists containing many 1000's of dependancies. Generally
the compiler either uses all available memory, or runs for far too long. */
DEFPARAM(PARAM_MAX_PENDING_LIST_LENGTH,
"max-pending-list-length",
"The maximum length of scheduling's pending operations list",
32)
/* The GCSE optimization will be disabled if it would require
significantly more memory than this value. */
DEFPARAM(PARAM_MAX_GCSE_MEMORY,
"max-gcse-memory",
"The maximum amount of memory to be allocated by GCSE",
50 * 1024 * 1024)
/* The number of repetitions of copy/const prop and PRE to run. */
DEFPARAM(PARAM_MAX_GCSE_PASSES,
"max-gcse-passes",
"The maximum number of passes to make when doing GCSE",
1)
/*
Local variables:
mode:c
End: */
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