/* params.def - Run-time parameters.
- Copyright (C) 2001 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2002 Free Software Foundation, Inc.
Written by Mark Mitchell <mark@codesourcery.com>.
This file is part of GCC.
gets decreased. */
DEFPARAM (PARAM_MAX_INLINE_INSNS_SINGLE,
"max-inline-insns-single",
- "The maximum number of instructions in a single function eliglible for inlining",
+ "The maximum number of instructions in a single function eligible for inlining",
300)
-/* The repeated inlining limit. After this number of instructions
+/* The single function inlining limit for functions that are
+ inlined by virtue of -finline-functions (-O3).
+ This limit should be chosen to be below or equal to the limit
+ 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 300. */
+DEFPARAM (PARAM_MAX_INLINE_INSNS_AUTO,
+ "max-inline-insns-auto",
+ "The maximum number of instructions when automatically inlining",
+ 300)
+
+/* The repeated inlining limit. After this number of instructions
(in the internal gcc representation, not real machine instructions)
got inlined by repeated inlining, gcc starts to decrease the maximum
number of inlinable instructions in the tree inliner.
could otherwise become very high.
It is recommended to set this value to twice the value of the single
function limit (set by the "max-inline-insns-single" parameter) or
- higher. The default value is 600.
+ higher. The default value is 600.
Higher values mean that more inlining is done, resulting in
better performance of the code, at the expense of higher
compile-time resource (time, memory) requirements and larger
- binaries.
- This parameters also controls the maximum size of functions considered
- for inlining in the RTL inliner. */
+ binaries. */
DEFPARAM (PARAM_MAX_INLINE_INSNS,
"max-inline-insns",
- "The maximuem number of instructions by repeated inlining before gcc starts to throttle inlining",
+ "The maximum number of instructions by repeated inlining before gcc starts to throttle inlining",
600)
/* After the repeated inline limit has been exceeded (see
decrease the size of single functions eligible for inlining.
The slope of this linear function is given the negative
reciprocal value (-1/x) of this parameter.
- The default vlue is 32.
+ The default value is 32.
This linear function is used until it falls below a minimum
value specified by the "min-inline-insns" parameter. */
DEFPARAM (PARAM_MAX_INLINE_SLOPE,
/* When gcc has inlined so many instructions (by repeated
inlining) that the throttling limits the inlining very much,
inlining for very small functions is still desirable to
- achieve good runtime performance. The size of single functions
+ achieve good runtime performance. The size of single functions
(measured in gcc instructions) which will still be eligible for
- inlining then is given by this parameter. It defaults to 130.
+ inlining then is given by this parameter. It defaults to 130.
Only much later (after exceeding 128 times the recursive limit)
inlining is cut down completely. */
DEFPARAM (PARAM_MIN_INLINE_INSNS,
"The number of instructions in a single functions still eligible to inlining after a lot recursive inlining",
130)
+/* For languages that (still) use the RTL inliner, we can specify
+ limits for the RTL inliner separately.
+ The parameter here defines the maximum number of RTL instructions
+ a function may have to be eligible for inlining in the RTL inliner.
+ The default value is 600. */
+DEFPARAM (PARAM_MAX_INLINE_INSNS_RTL,
+ "max-inline-insns-rtl",
+ "The maximum number of instructions for the RTL inliner",
+ 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
"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. */
+/* 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",
DEFPARAM(PARAM_MAX_UNROLLED_INSNS,
"max-unrolled-insns",
"The maximum number of instructions to consider to unroll in a loop",
+ 200)
+/* This parameter limits how many times the loop is unrolled depending
+ on number of insns really executed in each iteration. */
+DEFPARAM(PARAM_MAX_AVERAGE_UNROLLED_INSNS,
+ "max-average-unrolled-insns",
+ "The maximum number of instructions to consider to unroll in a loop on average",
+ 80)
+/* The maximum number of unrollings of a single loop. */
+DEFPARAM(PARAM_MAX_UNROLL_TIMES,
+ "max-unroll-times",
+ "The maximum number of unrollings of a single loop",
+ 8)
+/* The maximum number of insns of a peeled loop. */
+DEFPARAM(PARAM_MAX_PEELED_INSNS,
+ "max-peeled-insns",
+ "The maximum number of insns of a peeled loop",
+ 120)
+/* The maximum number of peelings of a single loop. */
+DEFPARAM(PARAM_MAX_PEEL_TIMES,
+ "max-peel-times",
+ "The maximum number of peelings of a single loop",
+ 16)
+/* The maximum number of insns of a peeled loop. */
+DEFPARAM(PARAM_MAX_COMPLETELY_PEELED_INSNS,
+ "max-completely-peeled-insns",
+ "The maximum number of insns of a completely peeled loop",
+ 120)
+/* The maximum number of peelings of a single loop that is peeled completely. */
+DEFPARAM(PARAM_MAX_COMPLETELY_PEEL_TIMES,
+ "max-completely-peel-times",
+ "The maximum number of peelings of a single loop that is peeled completely",
+ 16)
+/* The maximum number of insns of a peeled loop that rolls only once. */
+DEFPARAM(PARAM_MAX_ONCE_PEELED_INSNS,
+ "max-once-peeled-insns",
+ "The maximum number of insns of a peeled loop that rolls only once",
+ 200)
+
+/* The maximum number of insns of an unswitched loop. */
+DEFPARAM(PARAM_MAX_UNSWITCH_INSNS,
+ "max-unswitch-insns",
+ "The maximum number of insns of an unswitched loop",
+ 50)
+/* The maximum level of recursion in unswitch_single_loop. */
+DEFPARAM(PARAM_MAX_UNSWITCH_LEVEL,
+ "max-unswitch-level",
+ "The maximum number of unswitchings in a single loop",
+ 3)
+
+DEFPARAM(HOT_BB_COUNT_FRACTION,
+ "hot-bb-count-fraction",
+ "Select fraction of the maximal count of repetitions of basic block in \
+program given basic block needs to have to be considered hot",
+ 10000)
+DEFPARAM(HOT_BB_FREQUENCY_FRACTION,
+ "hot-bb-frequency-fraction",
+ "Select fraction of the maximal frequency of executions of basic \
+block in function given basic block needs to have to be considered hot",
+ 1000)
+DEFPARAM(TRACER_DYNAMIC_COVERAGE_FEEDBACK,
+ "tracer-dynamic-coverage-feedback",
+ "The percentage of function, weighted by execution frequency, that \
+must be covered by trace formation. Used when profile feedback is available",
+ 95)
+DEFPARAM(TRACER_DYNAMIC_COVERAGE,
+ "tracer-dynamic-coverage",
+ "The percentage of function, weighted by execution frequency, that \
+must be covered by trace formation. Used when profile feedback is not available",
+ 75)
+DEFPARAM(TRACER_MAX_CODE_GROWTH,
+ "tracer-max-code-growth",
+ "Maximal code growth caused by tail duplication (in percents)",
100)
+DEFPARAM(TRACER_MIN_BRANCH_RATIO,
+ "tracer-min-branch-ratio",
+ "Stop reverse growth if the reverse probability of best edge is less \
+than this threshold (in percents)",
+ 10)
+DEFPARAM(TRACER_MIN_BRANCH_PROBABILITY_FEEDBACK,
+ "tracer-min-branch-probability-feedback",
+ "Stop forward growth if the probability of best edge is less than \
+this threshold (in percents). Used when profile feedback is available",
+ 80)
+DEFPARAM(TRACER_MIN_BRANCH_PROBABILITY,
+ "tracer-min-branch-probability",
+ "Stop forward growth if the probability of best edge is less than \
+this threshold (in percents). Used when profile feedback is not available",
+ 50)
+
+/* The maximum number of incoming edges to consider for crossjumping. */
+DEFPARAM(PARAM_MAX_CROSSJUMP_EDGES,
+ "max-crossjump-edges",
+ "The maximum number of incoming edges to consider for crossjumping",
+ 100)
+
+#ifdef ENABLE_GC_ALWAYS_COLLECT
+# define GGC_MIN_EXPAND_DEFAULT 0
+# define GGC_MIN_HEAPSIZE_DEFAULT 0
+#else
+# define GGC_MIN_EXPAND_DEFAULT 30
+# define GGC_MIN_HEAPSIZE_DEFAULT 4096
+#endif
+
+DEFPARAM(GGC_MIN_EXPAND,
+ "ggc-min-expand",
+ "Minimum heap expansion to trigger garbage collection, as \
+a percentage of the total size of the heap.",
+ GGC_MIN_EXPAND_DEFAULT)
+
+DEFPARAM(GGC_MIN_HEAPSIZE,
+ "ggc-min-heapsize",
+ "Minimum heap size before we start collecting garbage, in kilobytes.",
+ GGC_MIN_HEAPSIZE_DEFAULT)
+
+#undef GGC_MIN_EXPAND_DEFAULT
+#undef GGC_MIN_HEAPSIZE_DEFAULT
+
/*
Local variables:
mode:c
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