1322177dbd
* Makefile.in, alias.c, basic-block.h, bb-reorder.c, bitmap.c, bitmap.h, builtin-types.def, builtins.c, builtins.def, c-aux-info.c, c-common.c, c-common.def, c-common.h, c-convert.c, c-decl.c, c-dump.c, c-dump.h, c-errors.c, c-format.c, c-lang.c, c-lex.c, c-lex.h, c-parse.in, c-pragma.c, c-pragma.h, c-semantics.c, c-tree.h, c-typeck.c, caller-save.c, calls.c, collect2.c, collect2.h, combine.c, conditions.h, config.gcc, configure.frag, configure.in, conflict.c, convert.c, convert.h, cppspec.c, crtstuff.c, cse.c, cselib.c, cselib.h, dbxout.c, dbxout.h, defaults.h, dependence.c, df.c, df.h, diagnostic.c, diagnostic.h, doloop.c, dominance.c, dwarf.h, dwarf2.h, dwarf2asm.c, dwarf2asm.h, dwarf2out.c, dwarf2out.h, dwarfout.c, emit-rtl.c, errors.c, errors.h, except.c, except.h, exgettext, explow.c, expmed.c, expr.c, expr.h, final.c, fixproto, flags.h, flow.c, fold-const.c, fp-test.c, function.c, function.h, gbl-ctors.h, gcc.c, gcc.h, gcc.hlp, gccspec.c, gcov-io.h, gcse.c, genattr.c, genattrtab.c, gencheck.c, gencodes.c, genconfig.c, genemit.c, genextract.c, genflags.c, gengenrtl.c, genmultilib, genopinit.c, genoutput.c, genpeep.c, genrecog.c, gensupport.c, gensupport.h, ggc-callbacks.c, ggc-common.c, ggc-none.c, ggc-page.c, ggc-simple.c, ggc.h, global.c, graph.c, graph.h, gthr-aix.h, gthr-dce.h, gthr-posix.h, gthr-rtems.h, gthr-single.h, gthr-solaris.h, gthr-vxworks.h, gthr-win32.h, gthr.h, haifa-sched.c, halfpic.c, halfpic.h, hard-reg-set.h, hwint.h, ifcvt.c, input.h, insn-addr.h, integrate.c, integrate.h, jump.c, lcm.c, libgcc2.c, libgcc2.h, lists.c, local-alloc.c, loop.c, loop.h, machmode.def, machmode.h, main.c, mbchar.c, mbchar.h, mips-tdump.c, mips-tfile.c, mklibgcc.in, mkmap-flat.awk, mkmap-symver.awk, optabs.c, output.h, params.c, params.def, params.h, predict.c, predict.def, predict.h, prefix.c, prefix.h, print-rtl.c, print-tree.c, profile.c, protoize.c, read-rtl.c, real.c, real.h, recog.c, recog.h, reg-stack.c, regclass.c, regmove.c, regrename.c, regs.h, reload.c, reload.h, reload1.c, reorg.c, resource.c, resource.h, rtl.c, rtl.def, rtl.h, rtlanal.c, sbitmap.c, sbitmap.h, sched-deps.c, sched-ebb.c, sched-int.h, sched-rgn.c, sched-vis.c, sdbout.c, sdbout.h, sibcall.c, simplify-rtx.c, ssa-ccp.c, ssa-dce.c, ssa.c, ssa.h, stmt.c, stor-layout.c, stringpool.c, system.h, timevar.c, timevar.def, timevar.h, tlink.c, toplev.c, toplev.h, tree.c, tree.def, tree.h, tsystem.h, unroll.c, unwind-dw2-fde.c, unwind-dw2-fde.h, unwind-dw2.c, unwind-pe.h, unwind-sjlj.c, unwind.h, unwind.inc, varasm.c, varray.c, varray.h, xcoffout.c, xcoffout.h: replace "GNU CC" with "GCC". From-SVN: r45105
99 lines
3.9 KiB
Modula-2
99 lines
3.9 KiB
Modula-2
/* This file contains the definitions and documentation for the
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builtins used in the GNU compiler.
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Copyright (C) 2001 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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/* Before including this file, you should define a macro:
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DEF_PREDICTOR (ENUM, NAME, HITRATE)
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This macro will be called once for each predictor. The ENUM will
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be of type `enum predictor', and will enumerate all supported
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predictors. The order of DEF_PREDICTOR calls is important, as
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in the first match combining heuristics, the predictor appearing
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first in this file will win.
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NAME is used in the debugging output to determine predictor type.
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HITRATE is the probability that edge predicted by predictor as taken
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will be really taken (so it should be always above
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REG_BR_PROB_BASE / 2). */
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/* A value used as final outcome of all heuristics. */
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DEF_PREDICTOR (PRED_COMBINED, "combined", PROB_ALWAYS, 0)
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/* An outcome estimated by Dempster-Shaffer theory. */
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DEF_PREDICTOR (PRED_DS_THEORY, "DS theory", PROB_ALWAYS, 0)
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/* An combined heuristics using probability determined by first
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matching heuristics from this list. */
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DEF_PREDICTOR (PRED_FIRST_MATCH, "first match", PROB_ALWAYS, 0)
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/* Heuristic applying when no heuristic bellow applies. */
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DEF_PREDICTOR (PRED_NO_PREDICTION, "no prediction", PROB_ALWAYS, 0)
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/* Mark unconditional jump as taken. */
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DEF_PREDICTOR (PRED_UNCONDITIONAL, "unconditional jump", PROB_ALWAYS,
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PRED_FLAG_FIRST_MATCH)
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/* Use number of loop iterations determined by loop unroller to set
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probability. We don't want to use Dempster-Shaffer theory here,
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as the predictions is exact. */
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DEF_PREDICTOR (PRED_LOOP_ITERATIONS, "loop iterations", PROB_ALWAYS,
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PRED_FLAG_FIRST_MATCH)
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/* Hints dropped by user via __builtin_expect feature. */
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DEF_PREDICTOR (PRED_BUILTIN_EXPECT, "__builtin_expect", PROB_VERY_LIKELY,
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PRED_FLAG_FIRST_MATCH)
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/* Branch to basic block containing call marked by noreturn attribute. */
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DEF_PREDICTOR (PRED_NORETURN, "noreturn call", PROB_ALWAYS,
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PRED_FLAG_FIRST_MATCH)
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/* Loopback edge is taken. */
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DEF_PREDICTOR (PRED_LOOP_BRANCH, "loop branch", HITRATE (89),
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PRED_FLAG_FIRST_MATCH)
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/* Edge causing loop to terminate is probably not taken. */
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DEF_PREDICTOR (PRED_LOOP_EXIT, "loop exit", HITRATE (90),
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PRED_FLAG_FIRST_MATCH)
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/* Condition emitted by preconditiong code to ensure that variable
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setting number of iterations is greater than initial value of iterator. */
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DEF_PREDICTOR (PRED_LOOP_CONDITION, "loop condition", PROB_VERY_LIKELY, 0)
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/* Preconditioning makes linear list of branches. */
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DEF_PREDICTOR (PRED_LOOP_PRECONDITIONING, "loop preconditioning", PROB_VERY_LIKELY, 0)
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/* Copied condition for the first iteration of loop is probably true. */
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DEF_PREDICTOR (PRED_LOOP_HEADER, "loop header", HITRATE (64), 0)
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/* Pointers are usually not NULL. */
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DEF_PREDICTOR (PRED_POINTER, "pointer", HITRATE (83), 0)
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/* NE is probable, EQ not etc... */
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DEF_PREDICTOR (PRED_OPCODE, "opcode", HITRATE (55), 0)
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/* Branch guarding call is probably taken. */
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DEF_PREDICTOR (PRED_CALL, "call", HITRATE (70), 0)
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/* Branch causing function to terminate is probably not taken. */
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DEF_PREDICTOR (PRED_ERROR_RETURN, "error return", PROB_LIKELY, 0)
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