/* params.def - Run-time parameters.
- Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
Free Software Foundation, Inc.
Written by Mark Mitchell <mark@codesourcery.com>.
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 number of array elements structure aliasing will decompose
- an array for. The default is 4. */
-DEFPARAM (PARAM_SALIAS_MAX_ARRAY_ELEMENTS,
- "salias-max-array-elements",
- "The maximum number of elements in an array for wich we track its elements separately",
- 4, 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
"The threshold ratio between current and hottest structure counts",
10, 0, 100)
+/* When branch is predicted to be taken with probability lower than this
+ threshold (in percent), then it is considered well predictable. */
+DEFPARAM (PARAM_PREDICTABLE_BRANCH_OUTCOME,
+ "predictable-branch-outcome",
+ "Maximal esitmated outcome of branch considered predictable",
+ 2, 0, 50)
+
/* 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_MAX_INLINE_INSNS_SINGLE,
"max-inline-insns-single",
"The maximum number of instructions in a single function eligible for inlining",
- 450, 0, 0)
+ 400, 0, 0)
/* The single function inlining limit for functions that are
inlined by virtue of -finline-functions (-O3).
DEFPARAM (PARAM_MAX_INLINE_INSNS_AUTO,
"max-inline-insns-auto",
"The maximum number of instructions when automatically inlining",
- 90, 0, 0)
+ 60, 0, 0)
DEFPARAM (PARAM_MAX_INLINE_INSNS_RECURSIVE,
"max-inline-insns-recursive",
"Inline recursively only when the probability of call being executed exceeds the parameter",
10, 0, 0)
+/* Limit of iterations of early inliner. This basically bounds number of
+ nested indirect calls early inliner can resolve. Deeper chains are still
+ handled by late 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)
+
/* Limit the number of expansions created by the variable expansion
optimization to avoid register pressure. */
DEFPARAM (PARAM_MAX_VARIABLE_EXPANSIONS,
"inline-unit-growth",
"how much can given compilation unit grow because of the inlining (in percent)",
30, 0, 0)
-DEFPARAM(PARAM_INLINE_CALL_COST,
- "inline-call-cost",
- "expense of call operation relative to ordinary arithmetic operations",
+DEFPARAM(PARAM_IPCP_UNIT_GROWTH,
+ "ipcp-unit-growth",
+ "how much can given compilation unit grow because of the interprocedural constant propagation (in percent)",
+ 10, 0, 0)
+DEFPARAM(PARAM_EARLY_INLINING_INSNS,
+ "early-inlining-insns",
+ "maximal estimated growth of function body caused by early inlining of single call",
12, 0, 0)
DEFPARAM(PARAM_LARGE_STACK_FRAME,
"large-stack-frame",
"max-gcse-memory",
"The maximum amount of memory to be allocated by GCSE",
50 * 1024 * 1024, 0, 0)
-/* 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",
- 1, 1, 0)
+
/* This is the threshold ratio when to perform partial redundancy
elimination after reload. We perform partial redundancy elimination
when the following holds:
"max-cselib-memory-locations",
"The maximum memory locations recorded by cselib",
500, 0, 0)
-DEFPARAM(PARAM_MAX_FLOW_MEMORY_LOCATIONS,
- "max-flow-memory-locations",
- "The maximum memory locations recorded by flow",
- 100, 0, 0)
#ifdef ENABLE_GC_ALWAYS_COLLECT
# define GGC_MIN_EXPAND_DEFAULT 0
"The maximum number of instructions to search backward when looking for equivalent reload",
100, 0, 0)
-DEFPARAM(PARAM_MAX_ALIASED_VOPS,
- "max-aliased-vops",
- "The maximum number of virtual operators that a function is allowed to have before triggering memory partitioning heuristics",
- 100, 0, 0)
-
-DEFPARAM(PARAM_AVG_ALIASED_VOPS,
- "avg-aliased-vops",
- "The average number of virtual operators that memory statements are allowed to have before triggering memory partitioning heuristics",
- 1, 0, 0)
-
DEFPARAM(PARAM_MAX_SCHED_REGION_BLOCKS,
"max-sched-region-blocks",
"The maximum number of blocks in a region to be considered for interblock scheduling",
"The maximum number of insns in a region to be considered for interblock scheduling",
100, 0, 0)
+DEFPARAM(PARAM_MAX_PIPELINE_REGION_BLOCKS,
+ "max-pipeline-region-blocks",
+ "The maximum number of blocks in a region to be considered for interblock scheduling",
+ 15, 0, 0)
+
+DEFPARAM(PARAM_MAX_PIPELINE_REGION_INSNS,
+ "max-pipeline-region-insns",
+ "The maximum number of insns in a region to be considered for interblock scheduling",
+ 200, 0, 0)
+
DEFPARAM(PARAM_MIN_SPEC_PROB,
"min-spec-prob",
"The minimum probability of reaching a source block for interblock speculative scheduling",
"The minimal probability of speculation success (in percents), so that speculative insn will be scheduled.",
40, 0, 100)
+DEFPARAM(PARAM_SELSCHED_MAX_LOOKAHEAD,
+ "selsched-max-lookahead",
+ "The maximum size of the lookahead window of selective scheduling",
+ 50, 0, 0)
+
+DEFPARAM(PARAM_SELSCHED_MAX_SCHED_TIMES,
+ "selsched-max-sched-times",
+ "Maximum number of times that an insn could be scheduled",
+ 2, 0, 0)
+
+DEFPARAM(PARAM_SELSCHED_INSNS_TO_RENAME,
+ "selsched-insns-to-rename",
+ "Maximum number of instructions in the ready list that are considered eligible for renaming",
+ 2, 0, 0)
+
+DEFPARAM (PARAM_SCHED_MEM_TRUE_DEP_COST,
+ "sched-mem-true-dep-cost",
+ "Minimal distance between possibly conflicting store and load",
+ 1, 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",
"Maximum size of a SCC before SCCVN stops processing a function",
10000, 10, 0)
+DEFPARAM (PARAM_IRA_MAX_LOOPS_NUM,
+ "ira-max-loops-num",
+ "max loops number for regional RA",
+ 100, 0, 0)
+
+DEFPARAM (PARAM_IRA_MAX_CONFLICT_TABLE_SIZE,
+ "ira-max-conflict-table-size",
+ "max size of conflict table in MB",
+ 1000, 0, 0)
+
+/* Switch initialization conversion will refuse to create arrays that are
+ bigger than this parameter times the number of switch branches. */
+
+DEFPARAM (PARAM_SWITCH_CONVERSION_BRANCH_RATIO,
+ "switch-conversion-max-branch-ratio",
+ "The maximum ratio between array size and switch branches for "
+ "a switch conversion to take place",
+ 8, 1, 0)
+
+/* Avoid doing loop invariant motion on very large loops. */
+
+DEFPARAM (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP,
+ "loop-invariant-max-bbs-in-loop",
+ "max basic blocks number in loop for loop invariant motion",
+ 10000, 0, 0)
-DEFPARAM (PARAM_DF_DOUBLE_QUEUE_THRESHOLD_FACTOR,
- "df-double-queue-threshold-factor",
- "Multiplier used for determining the double-queueing threshold",
- 2, 0, 0)
+/* Avoid SLP vectorization of large basic blocks. */
+DEFPARAM (PARAM_SLP_MAX_INSNS_IN_BB,
+ "slp-max-insns-in-bb",
+ "Maximum number of instructions in basic block to be considered for SLP vectorization",
+ 1000, 0, 0)
/*
Local variables: