/* params.def - Run-time parameters.
- Copyright (C) 2001, 2002, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2002, 2004, 2005 Free Software Foundation, Inc.
Written by Mark Mitchell <mark@codesourcery.com>.
This file is part of GCC.
Be sure to add an entry to invoke.texi summarizing the parameter. */
+/* The maximum number of fields in a variable with only implicit uses
+ for which structure aliasing will consider trying to track each
+ field. The default is 5. */
+DEFPARAM (PARAM_SALIAS_MAX_IMPLICIT_FIELDS,
+ "salias-max-implicit-fields",
+ "The maximum number of fields in a structure variable without direct structure accesses that GCC will attempt to track separately",
+ 5, 0, 0)
+
/* The maximum structure size at which the scalar replacement of
aggregates (SRA) pass will perform block copies. The default
value, 0, implies that GCC will select the most appropriate size
of a function counted in internal gcc instructions (not in
real machine instructions) that is eligible for inlining
by the tree inliner.
- The default value is 500.
+ The default value is 450.
Only functions marked inline (or methods defined in the class
- definition for C++) are affected by this, unless you set the
- -finline-functions (included in -O3) compiler option.
+ definition for C++) are affected by this.
There are more restrictions to inlining: If inlined functions
call other functions, the already inlined instructions are
counted and once the recursive inline limit (see
DEFPARAM (PARAM_MAX_INLINE_INSNS_SINGLE,
"max-inline-insns-single",
"The maximum number of instructions in a single function eligible for inlining",
- 500, 0, 0)
+ 450, 0, 0)
/* The single function inlining limit for functions that are
inlined by virtue of -finline-functions (-O3).
that is applied to functions marked inlined (or defined in the
class declaration in C++) given by the "max-inline-insns-single"
parameter.
- The default value is 150. */
+ The default value is 90. */
DEFPARAM (PARAM_MAX_INLINE_INSNS_AUTO,
"max-inline-insns-auto",
"The maximum number of instructions when automatically inlining",
- 120, 0, 0)
+ 90, 0, 0)
DEFPARAM (PARAM_MAX_INLINE_INSNS_RECURSIVE,
"max-inline-insns-recursive",
"The maximum number of instructions inline function can grow to via recursive inlining",
- 500, 0, 0)
+ 450, 0, 0)
DEFPARAM (PARAM_MAX_INLINE_INSNS_RECURSIVE_AUTO,
"max-inline-insns-recursive-auto",
"The maximum number of instructions non-inline function can grow to via recursive inlining",
- 500, 0, 0)
+ 450, 0, 0)
DEFPARAM (PARAM_MAX_INLINE_RECURSIVE_DEPTH,
"max-inline-recursive-depth",
DEFPARAM(PARAM_LARGE_FUNCTION_INSNS,
"large-function-insns",
"The size of function body to be considered large",
- 3000, 0, 0)
+ 2700, 0, 0)
DEFPARAM(PARAM_LARGE_FUNCTION_GROWTH,
"large-function-growth",
"Maximal growth due to inlining of large function (in percent)",
"inline-unit-growth",
"how much can given compilation unit grow because of the inlining (in percent)",
50, 0, 0)
+DEFPARAM(PARAM_INLINE_CALL_COST,
+ "inline-call-cost",
+ "expense of call operation relative to ordinary arithmetic operations",
+ 16, 0, 0)
/* The GCSE optimization will be disabled if it would require
significantly more memory than this value. */
"The minimum number of matching instructions to consider for crossjumping",
5, 0, 0)
+/* The maximum number of insns to duplicate when unfactoring computed gotos. */
+DEFPARAM(PARAM_MAX_GOTO_DUPLICATION_INSNS,
+ "max-goto-duplication-insns",
+ "The maximum number of insns to duplicate when unfactoring computed gotos",
+ 8, 0, 0)
+
/* The maximum length of path considered in cse. */
DEFPARAM(PARAM_MAX_CSE_PATH_LENGTH,
"max-cse-path-length",
"Bound on number of iv uses in loop optimized in iv optimizations",
250, 0, 0)
+/* If there are at most this number of ivs in the set, try removing unnecessary
+ ivs from the set always. */
+
+DEFPARAM(PARAM_IV_ALWAYS_PRUNE_CAND_SET_BOUND,
+ "iv-always-prune-cand-set-bound",
+ "If number of candidates in the set is smaller, we always try to remove unused ivs during its optimization",
+ 10, 0, 0)
+
+DEFPARAM(PARAM_SCEV_MAX_EXPR_SIZE,
+ "scev-max-expr-size",
+ "Bound on size of expressions used in the scalar evolutions analyzer",
+ 20, 0, 0)
+
/* The product of the next two is used to decide whether or not to
use .GLOBAL_VAR. See tree-dfa.c. */
DEFPARAM(PARAM_GLOBAL_VAR_THRESHOLD,
"The maximum number of insns in a region to be considered for interblock scheduling",
100, 0, 0)
+DEFPARAM(PARAM_MAX_LAST_VALUE_RTL,
+ "max-last-value-rtl",
+ "The maximum number of RTL nodes that can be recorded as combiner's last value",
+ 10000, 0, 0)
+
/* INTEGER_CST nodes are shared for values [{-1,0} .. N) for
{signed,unsigned} integral types. This determines N.
Experimentation shows 256 to be a good value. */
"The upper bound for sharing integer constants",
256, 2, 2)
+/* Incremental SSA updates for virtual operands may be very slow if
+ there is a large number of mappings to process. In those cases, it
+ is faster to rewrite the virtual symbols from scratch as if they
+ had been recently introduced. This heuristic cannot be applied to
+ SSA mappings for real SSA names, only symbols kept in FUD chains.
+
+ PARAM_MIN_VIRTUAL_MAPPINGS specifies the minimum number of virtual
+ mappings that should be registered to trigger the heuristic.
+
+ PARAM_VIRTUAL_MAPPINGS_TO_SYMS_RATIO specifies the ratio between
+ mappings and symbols. If the number of virtual mappings is
+ PARAM_VIRTUAL_MAPPINGS_TO_SYMS_RATIO bigger than the number of
+ virtual symbols to be updated, then the updater switches to a full
+ update for those symbols. */
+DEFPARAM (PARAM_MIN_VIRTUAL_MAPPINGS,
+ "min-virtual-mappings",
+ "Minimum number of virtual mappings to consider switching to full virtual renames",
+ 100, 0, 0)
+
+DEFPARAM (PARAM_VIRTUAL_MAPPINGS_TO_SYMS_RATIO,
+ "virtual-mappings-ratio",
+ "Ratio between virtual mappings and virtual symbols to do full virtual renames",
+ 3, 0, 0)
+
/*
Local variables:
mode:c
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