X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fpredict.def;h=997f4d2cc987a765c665f4d8839fe86edaeb761c;hb=0305c755745c1d24fb688d9b5bb540c4232417b7;hp=7559a12f4779898e5b649e6d04923a1fcf339b88;hpb=483f30d9e207f75b774dddf9a1b5422b794cfb3a;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/predict.def b/gcc/predict.def index 7559a12f477..997f4d2cc98 100644 --- a/gcc/predict.def +++ b/gcc/predict.def @@ -1,23 +1,22 @@ -/* This file contains the definitions and documentation for the - builtins used in the GNU compiler. - Copyright (C) 2001 Free Software Foundation, Inc. +/* Definitions for the branch prediction routines in the GNU compiler. + Copyright (C) 2001, 2003, 2004 Free Software Foundation, Inc. -This file is part of GNU CC. +This file is part of GCC. -GNU CC 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 2, or (at your option) -any later version. +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 2, or (at your option) any later +version. -GNU CC 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. +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 GNU CC; see the file COPYING. If not, write to -the Free Software Foundation, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ +along with GCC; see the file COPYING. If not, write to the Free +Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301, USA. */ /* Before including this file, you should define a macro: @@ -36,13 +35,19 @@ Boston, MA 02111-1307, USA. */ REG_BR_PROB_BASE / 2). */ -/* An combined heuristics using Dempster-Shaffer theory. */ +/* A value used as final outcome of all heuristics. */ DEF_PREDICTOR (PRED_COMBINED, "combined", PROB_ALWAYS, 0) -/* An combined heuristics using probability determined by first +/* 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) @@ -57,16 +62,19 @@ DEF_PREDICTOR (PRED_LOOP_ITERATIONS, "loop iterations", PROB_ALWAYS, DEF_PREDICTOR (PRED_BUILTIN_EXPECT, "__builtin_expect", PROB_VERY_LIKELY, PRED_FLAG_FIRST_MATCH) +/* Branch containing goto is probably not taken. */ +DEF_PREDICTOR (PRED_CONTINUE, "continue", HITRATE (56), 0) + /* Branch to basic block containing call marked by noreturn attribute. */ -DEF_PREDICTOR (PRED_NORETURN, "noreturn call", PROB_ALWAYS, +DEF_PREDICTOR (PRED_NORETURN, "noreturn call", HITRATE (99), PRED_FLAG_FIRST_MATCH) /* Loopback edge is taken. */ -DEF_PREDICTOR (PRED_LOOP_BRANCH, "loop branch", HITRATE (88), +DEF_PREDICTOR (PRED_LOOP_BRANCH, "loop branch", HITRATE (89), PRED_FLAG_FIRST_MATCH) -/* Edge causing loop to terminate is probably not taken. */ -DEF_PREDICTOR (PRED_LOOP_EXIT, "loop exit", HITRATE (92), +/* Edge causing loop to terminate is probably not taken. */ +DEF_PREDICTOR (PRED_LOOP_EXIT, "loop exit", HITRATE (90), PRED_FLAG_FIRST_MATCH) /* Condition emitted by preconditiong code to ensure that variable @@ -77,16 +85,38 @@ DEF_PREDICTOR (PRED_LOOP_CONDITION, "loop condition", PROB_VERY_LIKELY, 0) DEF_PREDICTOR (PRED_LOOP_PRECONDITIONING, "loop preconditioning", PROB_VERY_LIKELY, 0) /* Copied condition for the first iteration of loop is probably true. */ -DEF_PREDICTOR (PRED_LOOP_HEADER, "loop header", HITRATE (60), 0) +DEF_PREDICTOR (PRED_LOOP_HEADER, "loop header", HITRATE (64), 0) /* Pointers are usually not NULL. */ -DEF_PREDICTOR (PRED_POINTER, "pointer", HITRATE (75), 0) +DEF_PREDICTOR (PRED_POINTER, "pointer", HITRATE (81), 0) +DEF_PREDICTOR (PRED_TREE_POINTER, "pointer (on trees)", HITRATE (81), 0) /* NE is probable, EQ not etc... */ -DEF_PREDICTOR (PRED_OPCODE, "opcode", HITRATE (53), 0) +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 (79), 0) +DEF_PREDICTOR (PRED_TREE_OPCODE_NONEQUAL, "opcode values nonequal (on trees)", HITRATE (71), 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 (66), 0) +DEF_PREDICTOR (PRED_CALL, "call", HITRATE (70), 0) /* Branch causing function to terminate is probably not taken. */ -DEF_PREDICTOR (PRED_ERROR_RETURN, "error return", PROB_LIKELY, 0) +DEF_PREDICTOR (PRED_EARLY_RETURN, "early return", HITRATE (67), 0) +DEF_PREDICTOR (PRED_TREE_EARLY_RETURN, "early return (on trees)", HITRATE (67), 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 (95), 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 a mudflap bounds check are extremely unlikely. */ +DEF_PREDICTOR (PRED_MUDFLAP, "mudflap check", HITRATE (99), 0)