You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA.
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA.
*/
/* This file contains definitions for language-independent
- parameters. The DEFPARAM macro takes 4 arguments:
+ parameters. The DEFPARAM macro takes 6 arguments:
- The enumeral corresponding to this parameter.
- A default value for the parameter.
+ - The minimum acceptable value for the parameter.
+
+ - The maximum acceptable value for the parameter (if greater than
+ the minimum).
+
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
itself. */
DEFPARAM (PARAM_SRA_MAX_STRUCTURE_SIZE,
"sra-max-structure-size",
- "The maximum structure size (in bytes) at which GCC will do block copies",
+ "The maximum structure size (in bytes) for which GCC will "
+ "use by-element copies",
+ 0, 0, 0)
+
+/* The maximum number of structure fields which the SRA pass will
+ instantiate to avoid block copies. The default value, 0, implies
+ that GCC will select the appropriate value itself. */
+DEFPARAM (PARAM_SRA_MAX_STRUCTURE_COUNT,
+ "sra-max-structure-count",
+ "The maximum number of structure fields for which GCC will "
+ "use by-element copies",
0, 0, 0)
/* The ratio between instantiated fields and the complete structure
size. We say that if the ratio of the number of bytes in
instantiated fields to the number of bytes in the complete
- structure exceeds this parameter, then block copies are not used.
- The default is 75%. */
+ structure exceeds this parameter, or if the number of instantiated
+ fields to the total number of fields exceeds this parameter, then
+ block copies are not used. The default is 75%. */
DEFPARAM (PARAM_SRA_FIELD_STRUCTURE_RATIO,
"sra-field-structure-ratio",
"The threshold ratio between instantiated fields and the total structure 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",
"The maximum depth of recursive inlining for non-inline functions",
8, 0, 0)
+DEFPARAM (PARAM_MIN_INLINE_RECURSIVE_PROBABILITY,
+ "min-inline-recursive-probability",
+ "Inline recursively only when the probability of call being executed exceeds the parameter",
+ 10, 0, 0)
+
/* Limit the number of expansions created by the variable expansion
optimization to avoid register pressure. */
DEFPARAM (PARAM_MAX_VARIABLE_EXPANSIONS,
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. */
(Added loads execution count) */
DEFPARAM(PARAM_GCSE_AFTER_RELOAD_PARTIAL_FRACTION,
"gcse-after-reload-partial-fraction",
- "The threshold ratio for performing partial redundancy elimination after reload.",
+ "The threshold ratio for performing partial redundancy elimination after reload",
3, 0, 0)
/* This is the threshold ratio of the critical edges execution count compared to
the redundant loads execution count that permits performing the load
redundancy elimination in gcse after reload. */
DEFPARAM(PARAM_GCSE_AFTER_RELOAD_CRITICAL_FRACTION,
"gcse-after-reload-critical-fraction",
- "The threshold ratio of critical edges execution count that permit performing redundancy elimination after reload.",
+ "The threshold ratio of critical edges execution count that permit performing redundancy elimination after reload",
10, 0, 0)
/* This parameter limits the number of insns in a loop that will be unrolled,
and by how much the loop is unrolled.
"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",
"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,
DEFPARAM(PARAM_MAX_ALIASED_VOPS,
"max-aliased-vops",
- "The maximum number of virtual operands allowed to represent aliases before triggering alias grouping.",
+ "The maximum number of virtual operands allowed to represent aliases before triggering alias grouping",
500, 0, 0)
DEFPARAM(PARAM_MAX_SCHED_REGION_BLOCKS,
"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)
+
+DEFPARAM (PARAM_SSP_BUFFER_SIZE,
+ "ssp-buffer-size",
+ "The lower bound for a buffer to be considered for stack smashing protection",
+ 8, 1, 0)
+
/*
Local variables:
mode:c
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