* Makefile.in (toplev.o): Depend on params.h.

	(intergate.o): Likewise.
	(params.o): New target.
	* flags.h (inline_max_insns): Remove.
	* integrate.c: Include params.h.
	Use MAX_INLINE_INSNS instead of inline_max_insns.
	* params.c: New file.
	* params.h: Likewise.
	* params.def: Likewise.
	* toplev.c: Include params.h.
	(lang_independent_params): New variable.
	(decode_f_option): Use the param machinery instead of setting
	max_inline_insns.
	(independent_decode_option): Handle "--param name=value".
	(main): Register language-independent parameters.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@39683 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 85 insertions, 0 deletions

diff --git a/gcc/params.h b/gcc/params.h
new file mode 100644
index 00000000000..c097ad1c489
--- /dev/null
+++ b/gcc/params.h
@@ -0,0 +1,85 @@
+/* params.h - 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 module provides a means for setting integral parameters
+   dynamically.  Instead of encoding magic numbers in various places,
+   use this module to organize all the magic numbers in a single
+   place.  The values of the parameters can be set on the
+   command-line, thereby providing a way to control the amount of
+   effort spent on particular optimization passes, or otherwise tune
+   the behavior of the compiler.  */
+
+#ifndef PARAMS_H
+#define PARAMS_H
+
+/* No parameter shall have this value.  */
+
+#define INVALID_PARAM_VAL (-1)
+
+/* The information associated with each parameter.  */
+
+typedef struct param_info
+{
+  /* The name used with the `--param <name>=<value>' switch to set this
+     value.  */
+  const char *option;
+  /* The associated value.  */
+  int value;
+} param_info;
+
+/* An array containing the compiler parameters and their current
+   values.  */
+
+extern param_info *compiler_params;
+
+/* Add the N PARAMS to the current list of compiler parameters.  */
+
+extern void add_params 
+  PARAMS ((const param_info params[], size_t n));
+
+/* Set the VALUE associated with the parameter given by NAME.  */
+
+extern void set_param_value
+  PARAMS ((const char *name, int value));
+
+
+/* The parameters in use by language-independent code.  */
+
+typedef enum compiler_param
+{
+#define DEFPARAM(ENUM, OPTION, HELP, DEFAULT) \
+  ENUM,
+#include "params.def"
+#undef DEFPARAM  
+  LAST_PARAM
+} compiler_param;
+
+/* The value of the parameter given by ENUM.  */
+#define PARAM_VALUE(ENUM) \
+  (compiler_params[(int) ENUM].value)
+  
+/* Macros for the various parameters.  */
+#define MAX_INLINE_INSNS \
+  PARAM_VALUE (PARAM_MAX_INLINE_INSNS)
+
+#endif /* PARAMS_H */