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8sa1-gcc/gcc/predict.def
Jakub Jelinek ed9c79e1ea re PR ipa/58721 (The subroutine perdida is no longer inlined in fatigue.f90) 
PR ipa/58721
gcc/
	* internal-fn.c: Include diagnostic-core.h.
	(expand_BUILTIN_EXPECT): New function.
	* gimplify.c (gimplify_call_expr): Use false instead of FALSE.
	(gimplify_modify_expr): Gimplify 3 argument __builtin_expect into
	IFN_BUILTIN_EXPECT call instead of __builtin_expect builtin call.
	* ipa-inline-analysis.c (find_foldable_builtin_expect): Handle
	IFN_BUILTIN_EXPECT.
	* predict.c (expr_expected_value_1): Handle IFN_BUILTIN_EXPECT.
	Revert 3 argument __builtin_expect code.
	(strip_predict_hints): Handle IFN_BUILTIN_EXPECT.
	* gimple-fold.c (gimple_fold_call): Likewise.
	* tree.h (fold_builtin_expect): New prototype.
	* builtins.c (build_builtin_expect_predicate): Add predictor
	argument, if non-NULL, create 3 argument __builtin_expect.
	(fold_builtin_expect): No longer static.  Add ARG2 argument,
	pass it through to build_builtin_expect_predicate.
	(fold_builtin_2): Adjust caller.
	(fold_builtin_3): Handle BUILT_IN_EXPECT.
	* internal-fn.def (BUILTIN_EXPECT): New.
gcc/fortran/
	* trans.c (gfc_unlikely, gfc_likely): Don't add __builtin_expect
	if !optimize.

2014-03-18  Tobias Burnus  <burnus@net-b.de>

	PR ipa/58721
gcc/
	* predict.def (PRED_FORTRAN_OVERFLOW, PRED_FORTRAN_FAIL_ALLOC,
	PRED_FORTRAN_FAIL_IO, PRED_FORTRAN_WARN_ONCE, PRED_FORTRAN_SIZE_ZERO,
	PRED_FORTRAN_INVALID_BOUND, PRED_FORTRAN_ABSENT_DUMMY): Add.
gcc/fortran/
	* trans.h (gfc_unlikely, gfc_likely): Add predictor as argument.
	(gfc_trans_io_runtime_check): Remove.
	* trans-io.c (gfc_trans_io_runtime_check): Make static; add has_iostat
	as argument, add predictor to block.
	(set_parameter_value, gfc_trans_open, gfc_trans_close, build_filepos,
	gfc_trans_inquire, gfc_trans_wait, build_dt): Update calls.
	* trans.c (gfc_unlikely, gfc_likely): Add predictor as argument.
	(gfc_trans_runtime_check, gfc_allocate_using_malloc,
	gfc_allocate_allocatable, gfc_deallocate_with_status): Set explicitly
	branch predictor.
	* trans-expr.c (gfc_conv_procedure_call): Ditto.
	* trans-stmt.c (gfc_trans_allocate): Ditto.
	* trans-array.c (gfc_array_init_size, gfc_array_allocate): Ditto.

2014-03-18  Jan Hubicka  <hubicka@ucw.cz>

	PR ipa/58721
gcc/
	* predict.c (combine_predictions_for_bb): Fix up formatting.
	(expr_expected_value_1, expr_expected_value): Add predictor argument,
	fill what it points to if non-NULL.
	(tree_predict_by_opcode): Adjust caller, use the predictor.
	* predict.def (PRED_COMPARE_AND_SWAP): Add.

From-SVN: r208641
2014-03-18 12:31:04 +01:00

179 lines
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/* Definitions for the branch prediction routines in the GNU compiler.
Copyright (C) 2001-2014 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
/* Before including this file, you should define a macro:
DEF_PREDICTOR (ENUM, NAME, HITRATE)
This macro will be called once for each predictor. The ENUM will
be of type `enum predictor', and will enumerate all supported
predictors. The order of DEF_PREDICTOR calls is important, as
in the first match combining heuristics, the predictor appearing
first in this file will win.
NAME is used in the debugging output to determine predictor type.
HITRATE is the probability that edge predicted by predictor as taken
will be really taken (so it should be always above
REG_BR_PROB_BASE / 2). */
/* A value used as final outcome of all heuristics. */
DEF_PREDICTOR (PRED_COMBINED, "combined", PROB_ALWAYS, 0)
/* An outcome estimated by Dempster-Shaffer theory. */
DEF_PREDICTOR (PRED_DS_THEORY, "DS theory", PROB_ALWAYS, 0)
/* A combined heuristics using probability determined by first
matching heuristics from this list. */
DEF_PREDICTOR (PRED_FIRST_MATCH, "first match", PROB_ALWAYS, 0)
/* Heuristic applying when no heuristic below applies. */
DEF_PREDICTOR (PRED_NO_PREDICTION, "no prediction", PROB_ALWAYS, 0)
/* Mark unconditional jump as taken. */
DEF_PREDICTOR (PRED_UNCONDITIONAL, "unconditional jump", PROB_ALWAYS,
PRED_FLAG_FIRST_MATCH)
/* Use number of loop iterations determined by # of iterations
analysis to set probability. We don't want to use Dempster-Shaffer
theory here, as the predictions is exact. */
DEF_PREDICTOR (PRED_LOOP_ITERATIONS, "loop iterations", PROB_ALWAYS,
PRED_FLAG_FIRST_MATCH)
/* Assume that any given atomic operation has low contention,
and thus the compare-and-swap operation succeeds. */
DEF_PREDICTOR (PRED_COMPARE_AND_SWAP, "compare and swap", PROB_VERY_LIKELY,
PRED_FLAG_FIRST_MATCH)
/* Hints dropped by user via __builtin_expect feature. Note: the
probability of PROB_VERY_LIKELY is now overwritten by param
builtin_expect_probability with a default value of HITRATE(90).
Refer to param.def for details. */
DEF_PREDICTOR (PRED_BUILTIN_EXPECT, "__builtin_expect", PROB_VERY_LIKELY,
PRED_FLAG_FIRST_MATCH)
/* Use number of loop iterations guessed by the contents of the loop. */
DEF_PREDICTOR (PRED_LOOP_ITERATIONS_GUESSED, "guessed loop iterations",
PROB_ALWAYS, PRED_FLAG_FIRST_MATCH)
/* Branch containing goto is probably not taken. */
DEF_PREDICTOR (PRED_CONTINUE, "continue", HITRATE (50), 0)
/* Branch to basic block containing call marked by noreturn attribute. */
DEF_PREDICTOR (PRED_NORETURN, "noreturn call", PROB_VERY_LIKELY,
PRED_FLAG_FIRST_MATCH)
/* Branch to basic block containing call marked by cold function attribute. */
DEF_PREDICTOR (PRED_COLD_FUNCTION, "cold function call", PROB_VERY_LIKELY,
PRED_FLAG_FIRST_MATCH)
/* Loopback edge is taken. */
DEF_PREDICTOR (PRED_LOOP_BRANCH, "loop branch", HITRATE (86),
PRED_FLAG_FIRST_MATCH)
/* Edge causing loop to terminate is probably not taken. */
DEF_PREDICTOR (PRED_LOOP_EXIT, "loop exit", HITRATE (91),
PRED_FLAG_FIRST_MATCH)
/* Pointers are usually not NULL. */
DEF_PREDICTOR (PRED_POINTER, "pointer", HITRATE (85), 0)
DEF_PREDICTOR (PRED_TREE_POINTER, "pointer (on trees)", HITRATE (85), 0)
/* NE is probable, EQ not etc... */
DEF_PREDICTOR (PRED_OPCODE_POSITIVE, "opcode values positive", HITRATE (79), 0)
DEF_PREDICTOR (PRED_OPCODE_NONEQUAL, "opcode values nonequal", HITRATE (71), 0)
DEF_PREDICTOR (PRED_FPOPCODE, "fp_opcode", HITRATE (90), 0)
DEF_PREDICTOR (PRED_TREE_OPCODE_POSITIVE, "opcode values positive (on trees)", HITRATE (73), 0)
DEF_PREDICTOR (PRED_TREE_OPCODE_NONEQUAL, "opcode values nonequal (on trees)", HITRATE (72), 0)
DEF_PREDICTOR (PRED_TREE_FPOPCODE, "fp_opcode (on trees)", HITRATE (90), 0)
/* Branch guarding call is probably taken. */
DEF_PREDICTOR (PRED_CALL, "call", HITRATE (71), 0)
/* Branch causing function to terminate is probably not taken. */
DEF_PREDICTOR (PRED_TREE_EARLY_RETURN, "early return (on trees)", HITRATE (61), 0)
/* Branch containing goto is probably not taken. */
DEF_PREDICTOR (PRED_GOTO, "goto", HITRATE (70), 0)
/* Branch ending with return constant is probably not taken. */
DEF_PREDICTOR (PRED_CONST_RETURN, "const return", HITRATE (67), 0)
/* Branch ending with return negative constant is probably not taken. */
DEF_PREDICTOR (PRED_NEGATIVE_RETURN, "negative return", HITRATE (96), 0)
/* Branch ending with return; is probably not taken */
DEF_PREDICTOR (PRED_NULL_RETURN, "null return", HITRATE (90), 0)
/* Branches to compare induction variable to a loop bound is
extremely likely. */
DEF_PREDICTOR (PRED_LOOP_IV_COMPARE_GUESS, "guess loop iv compare",
PROB_VERY_LIKELY, 0)
/* Use number of loop iterations determined by # of iterations analysis
to set probability of branches that compares IV to loop bound variable. */
DEF_PREDICTOR (PRED_LOOP_IV_COMPARE, "loop iv compare", PROB_VERY_LIKELY,
PRED_FLAG_FIRST_MATCH)
/* Branches to hot labels are likely. */
DEF_PREDICTOR (PRED_HOT_LABEL, "hot label", HITRATE (85), 0)
/* Branches to cold labels are extremely unlikely. */
DEF_PREDICTOR (PRED_COLD_LABEL, "cold label", PROB_VERY_LIKELY,
PRED_FLAG_FIRST_MATCH)
/* The following predictors are used in Fortran. */
/* Branch leading to an integer overflow are extremely unlikely. */
DEF_PREDICTOR (PRED_FORTRAN_OVERFLOW, "overflow", PROB_ALWAYS,
PRED_FLAG_FIRST_MATCH)
/* Branch leading to a failure status are unlikely. This can occur for out
of memory or when trying to allocate an already allocated allocated or
deallocating an already deallocated allocatable. This predictor only
occurs when the user explicitly asked for a return status. By default,
the code aborts, which is handled via PRED_NORETURN. */
DEF_PREDICTOR (PRED_FORTRAN_FAIL_ALLOC, "fail alloc", PROB_VERY_LIKELY, 0)
/* Branch leading to an I/O failure status are unlikely. This predictor is
used for I/O failures such as for invalid unit numbers. This predictor
only occurs when the user explicitly asked for a return status. By default,
the code aborts, which is handled via PRED_NORETURN. */
DEF_PREDICTOR (PRED_FORTRAN_FAIL_IO, "fail alloc", HITRATE(85), 0)
/* Branch leading to a run-time warning message which is printed only once
are unlikely. The print-warning branch itself can be likely or unlikely. */
DEF_PREDICTOR (PRED_FORTRAN_WARN_ONCE, "warn once", HITRATE (75), 0)
/* Branch belonging to a zero-sized array. */
DEF_PREDICTOR (PRED_FORTRAN_SIZE_ZERO, "zero-sized array", HITRATE(70), 0)
/* Branch belonging to an invalid bound index, in a context where it is
standard conform and well defined but rather pointless and, hence, rather
unlikely to occur. */
DEF_PREDICTOR (PRED_FORTRAN_INVALID_BOUND, "zero-sized array", HITRATE(90), 0)
/* Branch belonging to the handling of absent optional arguments. This
predictor is used when an optional dummy argument, associated with an
absent argument, is passed on as actual argument to another procedure,
which in turn has an optional argument. */
DEF_PREDICTOR (PRED_FORTRAN_ABSENT_DUMMY, "absent dummy", HITRATE(60), 0)
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