/* params.def - Run-time parameters.
- Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
- 2011, 2012
- Free Software Foundation, Inc.
+ Copyright (C) 2001-2013 Free Software Foundation, Inc.
Written by Mark Mitchell <mark@codesourcery.com>.
This file is part of GCC.
"Maximal estimated outcome of branch considered predictable",
2, 0, 50)
+DEFPARAM (PARAM_INLINE_MIN_SPEEDUP,
+ "inline-min-speedup",
+ "The minimal estimated speedup allowing inliner to ignore inline-insns-single and inline-isnsns-auto",
+ 10, 0, 0)
+
/* The single function inlining limit. This is the maximum size
of a function counted in internal gcc instructions (not in
real machine instructions) that is eligible for inlining
DEFPARAM (PARAM_EARLY_INLINER_MAX_ITERATIONS,
"max-early-inliner-iterations",
"The maximum number of nested indirect inlining performed by early inliner",
- 10, 0, 0)
+ 1, 0, 0)
/* Limit on probability of entry BB. */
DEFPARAM (PARAM_COMDAT_SHARING_PROBABILITY,
DEFPARAM(PARAM_MAX_PEELED_INSNS,
"max-peeled-insns",
"The maximum number of insns of a peeled loop",
- 400, 0, 0)
+ 100, 0, 0)
/* 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, 0, 0)
+/* The maximum number of peelings of a single loop that is peeled completely. */
+DEFPARAM(PARAM_MAX_PEEL_BRANCHES,
+ "max-peel-branches",
+ "The maximum number of branches on the path through the peeled sequence",
+ 32, 0, 0)
/* 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",
- 400, 0, 0)
+ 100, 0, 0)
/* The maximum number of peelings of a single loop that is peeled completely. */
DEFPARAM(PARAM_MAX_COMPLETELY_PEEL_TIMES,
"max-completely-peel-times",
"A threshold on the average loop count considered by the swing modulo scheduler",
0, 0, 0)
-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, 0, 0)
+DEFPARAM(HOT_BB_COUNT_WS_PERMILLE,
+ "hot-bb-count-ws-permille",
+ "A basic block profile count is considered hot if it contributes to "
+ "the given permillage of the entire profiled execution",
+ 999, 0, 1000)
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",
DEFPARAM (PARAM_ALIGN_THRESHOLD,
"align-threshold",
"Select fraction of the maximal frequency of executions of basic block in function given basic block get alignment",
- 100, 0, 0)
+ 100, 1, 0)
DEFPARAM (PARAM_ALIGN_LOOP_ITERATIONS,
"align-loop-iterations",
flatten the profile.
We need to cut the maximal predicted iterations to large enough iterations
- so the loop appears important, but safely within HOT_BB_COUNT_FRACTION
+ so the loop appears important, but safely within maximum hotness
range. */
DEFPARAM(PARAM_MAX_PREDICTED_ITERATIONS,
DEFPARAM(PARAM_MIN_CROSSJUMP_INSNS,
"min-crossjump-insns",
"The minimum number of matching instructions to consider for crossjumping",
- 5, 0, 0)
+ 5, 1, 0)
/* The maximum number expansion factor when copying basic blocks. */
DEFPARAM(PARAM_MAX_GROW_COPY_BB_INSNS,
DEFPARAM(PARAM_MAX_CSE_PATH_LENGTH,
"max-cse-path-length",
"The maximum length of path considered in cse",
- 10, 0, 0)
+ 10, 1, 0)
DEFPARAM(PARAM_MAX_CSE_INSNS,
"max-cse-insns",
"The maximum instructions CSE process before flushing",
"The minimal probability of speculation success (in percents), so that speculative insn will be scheduled.",
40, 0, 100)
+DEFPARAM(PARAM_SCHED_STATE_EDGE_PROB_CUTOFF,
+ "sched-state-edge-prob-cutoff",
+ "The minimum probability an edge must have for the scheduler to save its state across it.",
+ 10, 0, 100)
+
DEFPARAM(PARAM_SELSCHED_MAX_LOOKAHEAD,
"selsched-max-lookahead",
"The maximum size of the lookahead window of selective scheduling",
"The upper bound for sharing integer constants",
251, 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",
"Maximum size of a SCC before SCCVN stops processing a function",
10000, 10, 0)
+/* The following is used as a stop-gap limit for cases where really huge
+ functions blow up compile-time use too much. It limits the number of
+ alias-queries we do for finding common subexpressions for memory loads and
+ stores. The number of alias-queries is otherwise limited by the number of
+ stores on paths to function entry. */
+
+DEFPARAM (PARAM_SCCVN_MAX_ALIAS_QUERIES_PER_ACCESS,
+ "sccvn-max-alias-queries-per-access",
+ "Maximum number of disambiguations to perform per memory access",
+ 1000, 0, 0)
+
DEFPARAM (PARAM_IRA_MAX_LOOPS_NUM,
"ira-max-loops-num",
"Max loops number for regional RA",
"Max. recursion depth for expanding var tracking expressions",
12, 0, 0)
+/* Set maximum length of value location list for which var tracking
+ should add reverse operations. */
+
+DEFPARAM (PARAM_MAX_VARTRACK_REVERSE_OP_SIZE,
+ "max-vartrack-reverse-op-size",
+ "Max. size of loc list for which reverse ops should be added",
+ 50, 0, 0)
+
/* Set minimum insn uid for non-debug insns. */
DEFPARAM (PARAM_MIN_NONDEBUG_INSN_UID,
"beneficial to clone.",
500, 0, 0)
+DEFPARAM (PARAM_IPA_MAX_AGG_ITEMS,
+ "ipa-max-agg-items",
+ "Maximum number of aggregate content items for a parameter in "
+ "jump functions and lattices",
+ 16, 0, 0)
+
+DEFPARAM (PARAM_IPA_CP_LOOP_HINT_BONUS,
+ "ipa-cp-loop-hint-bonus",
+ "Compile-time bonus IPA-CP assigns to candidates which make loop "
+ "bounds or strides known.",
+ 64, 0, 0)
+
/* WHOPR partitioning configuration. */
DEFPARAM (PARAM_LTO_PARTITIONS,
"track string lengths",
1000, 0, 0)
+/* Keep this in sync with the sched_pressure_algorithm enum. */
+DEFPARAM (PARAM_SCHED_PRESSURE_ALGORITHM,
+ "sched-pressure-algorithm",
+ "Which -fsched-pressure algorithm to apply",
+ 1, 1, 2)
+
+/* Maximum length of candidate scans in straight-line strength reduction. */
+DEFPARAM (PARAM_MAX_SLSR_CANDIDATE_SCAN,
+ "max-slsr-cand-scan",
+ "Maximum length of candidate scans for straight-line "
+ "strength reduction",
+ 50, 1, 999999)
+
/*
Local variables:
mode:c
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