c7131fb2b5
2015-07-07 Andrew MacLeod <amacleod@redhat.com> * tree-core.h: Include symtab.h. * rtl.h: Include hard-reg-set.h but not flags.h. (HARD_CONST): Remove condition compilation involving HARD_CONST since hard-reg-set.h is always included. * regs.h: Don't include hard-reg-set.h or rtl.h. * cfg.h: Include dominance.h. * gimple.h: Include tree-ssa-alias.h and gimple-expr.h. * backend.h: New. Aggregate commonly used backend header files. * gimple-ssa.h: Don't include tree-hasher.h. * ssa.h: New. Aggregate commonly used SSA header files. * regset.h: Remove bitmap.h and hard-reg-set.h #includes. * sel-sched-ir.h: Flatten includes. * lra-int.h: Flatten completely. * sel-sched-dump.h: Flatten includes. * ira-int.h: Flatten includes. * gimple-streamer.h: Remove all includes. * cfgloop.h: Remove all #includes except cfgloopmanip.h. * resource.h: Flatten hard-reg-set.h and df.h. * sched-int.h: Flatten insn-arrt.h and df.h. * valtrack.h: flatten bitmap.h, df.h, and rtl.h * df.h: Flatten includes, leaving regset.h, alloc-pool.h and timevar.h. * genattrtab.c (write_header): Adjust generated includes. * genautomata.c (main): Likewise. * genconditions.c (write-header): Likewise. * genemit.c (main): Likewise. * gengtype.c (open_base_files): Likewise. * genopinit.c (main): Likewise. * genoutput.c (output_prologue): Likewise. * genpeep.c (main): Likewise. * genpreds.c (write_insn_preds_c): Likewise. * genrecog.c (write_header): Likewise. * alias.c: Adjust includes. * asan.c: Likewise. * attribs.c: Likewise. * auto-inc-dec.c: Likewise. * auto-profile.c: Likewise. * bb-reorder.c: Likewise. * bt-load.c: Likewise. * builtins.c: Likewise. * caller-save.c: Likewise. * calls.c: Likewise. * ccmp.c: Likewise. * cfg.c: Likewise. * cfganal.c: Likewise. * cfgbuild.c: Likewise. * cfgcleanup.c: Likewise. * cfgexpand.c: Likewise. * cfghooks.c: Likewise. * cfgloop.c: Likewise. * cfgloopanal.c: Likewise. * cfgloopmanip.c: Likewise. * cfgrtl.c: Likewise. * cgraph.c: Likewise. * cgraphbuild.c: Likewise. * cgraphclones.c: Likewise. * cgraphunit.c: Likewise. * cilk-common.c: Likewise. * combine-stack-adj.c: Likewise. * combine.c: Likewise. * compare-elim.c: Likewise. * convert.c: Likewise. * coverage.c: Likewise. * cppbuiltin.c: Likewise. * cprop.c: Likewise. * cse.c: Likewise. * cselib.c: Likewise. * data-streamer-in.c: Likewise. * data-streamer-out.c: Likewise. * data-streamer.c: Likewise. * dbxout.c: Likewise. * dce.c: Likewise. * ddg.c: Likewise. * debug.c: Likewise. * df-core.c: Likewise. * df-problems.c: Likewise. * df-scan.c: Likewise. * dfp.c: Likewise. * dojump.c: Likewise. * dominance.c: Likewise. * domwalk.c: Likewise. * double-int.c: Likewise. * dse.c: Likewise. * dumpfile.c: Likewise. * dwarf2asm.c: Likewise. * dwarf2cfi.c: Likewise. * dwarf2out.c: Likewise. * emit-rtl.c: Likewise. * et-forest.c: Likewise. * except.c: Likewise. * explow.c: Likewise. * expmed.c: Likewise. * expr.c: Likewise. * final.c: Likewise. * fixed-value.c: Likewise. * fold-const.c: Likewise. * function.c: Likewise. * fwprop.c: Likewise. * gcc-plugin.h: Likewise. * gcse-common.c: Likewise. * gcse.c: Likewise. * generic-match-head.c: Likewise. * ggc-page.c: Likewise. * gimple-builder.c: Likewise. * gimple-expr.c: Likewise. * gimple-fold.c: Likewise. * gimple-iterator.c: Likewise. * gimple-low.c: Likewise. * gimple-match-head.c: Likewise. * gimple-pretty-print.c: Likewise. * gimple-ssa-isolate-paths.c: Likewise. * gimple-ssa-strength-reduction.c: Likewise. * gimple-streamer-in.c: Likewise. * gimple-streamer-out.c: Likewise. * gimple-walk.c: Likewise. * gimple.c: Likewise. * gimplify-me.c: Likewise. * gimplify.c: Likewise. * godump.c: Likewise. * graph.c: Likewise. * graphite-blocking.c: Likewise. * graphite-dependences.c: Likewise. * graphite-interchange.c: Likewise. * graphite-isl-ast-to-gimple.c: Likewise. * graphite-optimize-isl.c: Likewise. * graphite-poly.c: Likewise. * graphite-scop-detection.c: Likewise. * graphite-sese-to-poly.c: Likewise. * graphite.c: Likewise. * haifa-sched.c: Likewise. * hw-doloop.c: Likewise. * ifcvt.c: Likewise. * init-regs.c: Likewise. * internal-fn.c: Likewise. * ipa-chkp.c: Likewise. * ipa-comdats.c: Likewise. * ipa-cp.c: Likewise. * ipa-devirt.c: Likewise. * ipa-icf-gimple.c: Likewise. * ipa-icf.c: Likewise. * ipa-inline-analysis.c: Likewise. * ipa-inline-transform.c: Likewise. * ipa-inline.c: Likewise. * ipa-polymorphic-call.c: Likewise. * ipa-profile.c: Likewise. * ipa-prop.c: Likewise. * ipa-pure-const.c: Likewise. * ipa-ref.c: Likewise. * ipa-reference.c: Likewise. * ipa-split.c: Likewise. * ipa-utils.c: Likewise. * ipa-visibility.c: Likewise. * ipa.c: Likewise. * ira-build.c: Likewise. * ira-color.c: Likewise. * ira-conflicts.c: Likewise. * ira-costs.c: Likewise. * ira-emit.c: Likewise. * ira-lives.c: Likewise. * ira.c: Likewise. * jump.c: Likewise. * langhooks.c: Likewise. * lcm.c: Likewise. * loop-doloop.c: Likewise. * loop-init.c: Likewise. * loop-invariant.c: Likewise. * loop-iv.c: Likewise. * loop-unroll.c: Likewise. * lower-subreg.c: Likewise. * lra-assigns.c: Likewise. * lra-coalesce.c: Likewise. * lra-constraints.c: Likewise. * lra-eliminations.c: Likewise. * lra-lives.c: Likewise. * lra-remat.c: Likewise. * lra-spills.c: Likewise. * lra.c: Likewise. * lto-cgraph.c: Likewise. * lto-compress.c: Likewise. * lto-opts.c: Likewise. * lto-section-in.c: Likewise. * lto-section-out.c: Likewise. * lto-streamer-in.c: Likewise. * lto-streamer-out.c: Likewise. * lto-streamer.c: Likewise. * mcf.c: Likewise. * mode-switching.c: Likewise. * modulo-sched.c: Likewise. * omega.c: Likewise. * omp-low.c: Likewise. * optabs.c: Likewise. * opts-global.c: Likewise. * passes.c: Likewise. * plugin.c: Likewise. * postreload-gcse.c: Likewise. * postreload.c: Likewise. * predict.c: Likewise. * print-rtl.c: Likewise. * print-tree.c: Likewise. * profile.c: Likewise. * real.c: Likewise. * realmpfr.c: Likewise. * recog.c: Likewise. * ree.c: Likewise. * reg-stack.c: Likewise. * regcprop.c: Likewise. * reginfo.c: Likewise. * regrename.c: Likewise. * regstat.c: Likewise. * reload.c: Likewise. * reload1.c: Likewise. * reorg.c: Likewise. * resource.c: Likewise. * rtl-chkp.c: Likewise. * rtlanal.c: Likewise. * rtlhooks.c: Likewise. * sanopt.c: Likewise. * sched-deps.c: Likewise. * sched-ebb.c: Likewise. * sched-rgn.c: Likewise. * sched-vis.c: Likewise. * sdbout.c: Likewise. * sel-sched-dump.c: Likewise. * sel-sched-ir.c: Likewise. * sel-sched.c: Likewise. * sese.c: Likewise. * shrink-wrap.c: Likewise. * simplify-rtx.c: Likewise. * stack-ptr-mod.c: Likewise. * stmt.c: Likewise. * stor-layout.c: Likewise. * store-motion.c: Likewise. * stringpool.c: Likewise. * symtab.c: Likewise. * target-globals.c: Likewise. * targhooks.c: Likewise. * toplev.c: Likewise. * tracer.c: Likewise. * trans-mem.c: Likewise. * tree-affine.c: Likewise. * tree-browser.c: Likewise. * tree-call-cdce.c: Likewise. * tree-cfg.c: Likewise. * tree-cfgcleanup.c: Likewise. * tree-chkp-opt.c: Likewise. * tree-chkp.c: Likewise. * tree-chrec.c: Likewise. * tree-complex.c: Likewise. * tree-data-ref.c: Likewise. * tree-dfa.c: Likewise. * tree-diagnostic.c: Likewise. * tree-dump.c: Likewise. * tree-eh.c: Likewise. * tree-emutls.c: Likewise. * tree-if-conv.c: Likewise. * tree-inline.c: Likewise. * tree-into-ssa.c: Likewise. * tree-iterator.c: Likewise. * tree-loop-distribution.c: Likewise. * tree-nested.c: Likewise. * tree-nrv.c: Likewise. * tree-object-size.c: Likewise. * tree-outof-ssa.c: Likewise. * tree-parloops.c: Likewise. * tree-phinodes.c: Likewise. * tree-predcom.c: Likewise. * tree-pretty-print.c: Likewise. * tree-profile.c: Likewise. * tree-scalar-evolution.c: Likewise. * tree-sra.c: Likewise. * tree-ssa-address.c: Likewise. * tree-ssa-alias.c: Likewise. * tree-ssa-ccp.c: Likewise. * tree-ssa-coalesce.c: Likewise. * tree-ssa-copy.c: Likewise. * tree-ssa-copyrename.c: Likewise. * tree-ssa-dce.c: Likewise. * tree-ssa-dom.c: Likewise. * tree-ssa-dse.c: Likewise. * tree-ssa-forwprop.c: Likewise. * tree-ssa-ifcombine.c: Likewise. * tree-ssa-live.c: Likewise. * tree-ssa-loop-ch.c: Likewise. * tree-ssa-loop-im.c: Likewise. * tree-ssa-loop-ivcanon.c: Likewise. * tree-ssa-loop-ivopts.c: Likewise. * tree-ssa-loop-manip.c: Likewise. * tree-ssa-loop-niter.c: Likewise. * tree-ssa-loop-prefetch.c: Likewise. * tree-ssa-loop-unswitch.c: Likewise. * tree-ssa-loop.c: Likewise. * tree-ssa-math-opts.c: Likewise. * tree-ssa-operands.c: Likewise. * tree-ssa-phiopt.c: Likewise. * tree-ssa-phiprop.c: Likewise. * tree-ssa-pre.c: Likewise. * tree-ssa-propagate.c: Likewise. * tree-ssa-reassoc.c: Likewise. * tree-ssa-sccvn.c: Likewise. * tree-ssa-scopedtables.c: Likewise. * tree-ssa-sink.c: Likewise. * tree-ssa-strlen.c: Likewise. * tree-ssa-structalias.c: Likewise. * tree-ssa-tail-merge.c: Likewise. * tree-ssa-ter.c: Likewise. * tree-ssa-threadedge.c: Likewise. * tree-ssa-threadupdate.c: Likewise. * tree-ssa-uncprop.c: Likewise. * tree-ssa-uninit.c: Likewise. * tree-ssa.c: Likewise. * tree-ssanames.c: Likewise. * tree-stdarg.c: Likewise. * tree-streamer-in.c: Likewise. * tree-streamer-out.c: Likewise. * tree-streamer.c: Likewise. * tree-switch-conversion.c: Likewise. * tree-tailcall.c: Likewise. * tree-vect-data-refs.c: Likewise. * tree-vect-generic.c: Likewise. * tree-vect-loop-manip.c: Likewise. * tree-vect-loop.c: Likewise. * tree-vect-patterns.c: Likewise. * tree-vect-slp.c: Likewise. * tree-vect-stmts.c: Likewise. * tree-vectorizer.c: Likewise. * tree-vrp.c: Likewise. * tree.c: Likewise. * tsan.c: Likewise. * ubsan.c: Likewise. * valtrack.c: Likewise. * value-prof.c: Likewise. * var-tracking.c: Likewise. * varasm.c: Likewise. * varpool.c: Likewise. * vmsdbgout.c: Likewise. * vtable-verify.c: Likewise. * web.c: Likewise. * wide-int.cc: Likewise. * xcoffout.c: Likewise. * config/aarch64/aarch64-builtins.c: Likewise. * config/aarch64/aarch64.c: Likewise. * config/aarch64/cortex-a57-fma-steering.c: Likewise. * config/alpha/alpha.c: Likewise. * config/arc/arc.c: Likewise. * config/arm/aarch-common.c: Likewise. * config/arm/arm-builtins.c: Likewise. * config/arm/arm-c.c: Likewise. * config/arm/arm.c: Likewise. * config/avr/avr-c.c: Likewise. * config/avr/avr-log.c: Likewise. * config/avr/avr.c: Likewise. * config/bfin/bfin.c: Likewise. * config/c6x/c6x.c: Likewise. * config/cr16/cr16.c: Likewise. * config/cris/cris.c: Likewise. * config/darwin-c.c: Likewise. * config/darwin.c: Likewise. * config/epiphany/epiphany.c: Likewise. * config/epiphany/mode-switch-use.c: Likewise. * config/epiphany/resolve-sw-modes.c: Likewise. * config/fr30/fr30.c: Likewise. * config/frv/frv.c: Likewise. * config/ft32/ft32.c: Likewise. * config/h8300/h8300.c: Likewise. * config/i386/i386-c.c: Likewise. * config/i386/i386.c: Likewise. * config/i386/msformat-c.c: Likewise. * config/i386/winnt-cxx.c: Likewise. * config/i386/winnt-stubs.c: Likewise. * config/i386/winnt.c: Likewise. * config/ia64/ia64-c.c: Likewise. * config/ia64/ia64.c: Likewise. * config/iq2000/iq2000.c: Likewise. * config/lm32/lm32.c: Likewise. * config/m32c/m32c-pragma.c: Likewise. * config/m32c/m32c.c: Likewise. * config/m32r/m32r.c: Likewise. * config/m68k/m68k.c: Likewise. * config/mcore/mcore.c: Likewise. * config/mep/mep-pragma.c: Likewise. * config/mep/mep.c: Likewise. * config/microblaze/microblaze-c.c: Likewise. * config/microblaze/microblaze.c: Likewise. * config/mips/mips.c: Likewise. * config/mmix/mmix.c: Likewise. * config/mn10300/mn10300.c: Likewise. * config/moxie/moxie.c: Likewise. * config/msp430/msp430-c.c: Likewise. * config/msp430/msp430.c: Likewise. * config/nds32/nds32-cost.c: Likewise. * config/nds32/nds32-fp-as-gp.c: Likewise. * config/nds32/nds32-intrinsic.c: Likewise. * config/nds32/nds32-isr.c: Likewise. * config/nds32/nds32-md-auxiliary.c: Likewise. * config/nds32/nds32-memory-manipulation.c: Likewise. * config/nds32/nds32-pipelines-auxiliary.c: Likewise. * config/nds32/nds32-predicates.c: Likewise. * config/nds32/nds32.c: Likewise. * config/nios2/nios2.c: Likewise. * config/nvptx/nvptx.c: Likewise. * config/pa/pa.c: Likewise. * config/pdp11/pdp11.c: Likewise. * config/rl78/rl78-c.c: Likewise. * config/rl78/rl78.c: Likewise. * config/rs6000/rs6000-c.c: Likewise. * config/rs6000/rs6000.c: Likewise. * config/rx/rx.c: Likewise. * config/s390/s390-c.c: Likewise. * config/s390/s390.c: Likewise. * config/sh/sh-c.c: Likewise. * config/sh/sh-mem.cc: Likewise. * config/sh/sh.c: Likewise. * config/sh/sh_optimize_sett_clrt.cc: Likewise. * config/sh/sh_treg_combine.cc: Likewise. * config/sol2-c.c: Likewise. * config/sol2-cxx.c: Likewise. * config/sol2-stubs.c: Likewise. * config/sol2.c: Likewise. * config/sparc/sparc-c.c: Likewise. * config/sparc/sparc.c: Likewise. * config/spu/spu-c.c: Likewise. * config/spu/spu.c: Likewise. * config/stormy16/stormy16.c: Likewise. * config/tilegx/mul-tables.c: Likewise. * config/tilegx/tilegx-c.c: Likewise. * config/tilegx/tilegx.c: Likewise. * config/tilepro/mul-tables.c: Likewise. * config/tilepro/tilepro-c.c: Likewise. * config/tilepro/tilepro.c: Likewise. * config/v850/v850-c.c: Likewise. * config/v850/v850.c: Likewise. * config/vax/vax.c: Likewise. * config/visium/visium.c: Likewise. * config/vms/vms-c.c: Likewise. * config/vms/vms.c: Likewise. * config/vxworks.c: Likewise. * config/xtensa/xtensa.c: Likewise. ada 2015-07-07 Andrew MacLeod <amacleod@redhat.com> * gcc-interface/cuintp.c: Adjust includes. * gcc-interface/decl.c: Likewise. * gcc-interface/misc.c: Likewise. * gcc-interface/targtyps.c: Likewise. * gcc-interface/trans.c: Likewise. * gcc-interface/utils.c: Likewise. * gcc-interface/utils2.c: Likewise. c 2015-07-07 Andrew MacLeod <amacleod@redhat.com> * c-array-notation.c: Adjust includes. * c-aux-info.c: Likewise. * c-convert.c: Likewise. * c-decl.c: Likewise. * c-errors.c: Likewise. * c-lang.c: Likewise. * c-objc-common.c: Likewise. * c-parser.c: Likewise. * c-typeck.c: Likewise. c-family 2015-07-07 Andrew MacLeod <amacleod@redhat.com> * array-notation-common.c: Adjust includes. * c-ada-spec.c: Likewise. * c-cilkplus.c: Likewise. * c-common.h: Likewise. * c-cppbuiltin.c: Likewise. * c-dump.c: Likewise. * c-format.c: Likewise. * c-gimplify.c: Likewise. * c-indentation.c: Likewise. * c-lex.c: Likewise. * c-omp.c: Likewise. * c-opts.c: Likewise. * c-pch.c: Likewise. * c-ppoutput.c: Likewise. * c-pragma.c: Likewise. * c-pretty-print.c: Likewise. * c-semantics.c: Likewise. * c-ubsan.c: Likewise. * cilk.c: Likewise. * stub-objc.c: Likewise. cp 2015-07-07 Andrew MacLeod <amacleod@redhat.com> * call.c: Adjust includes. * class.c: Likewise. * constexpr.c: Likewise. * cp-array-notation.c: Likewise. * cp-gimplify.c: Likewise. * cp-lang.c: Likewise. * cp-objcp-common.c: Likewise. * cp-ubsan.c: Likewise. * cvt.c: Likewise. * decl.c: Likewise. * decl2.c: Likewise. * dump.c: Likewise. * error.c: Likewise. * except.c: Likewise. * expr.c: Likewise. * friend.c: Likewise. * init.c: Likewise. * lambda.c: Likewise. * lex.c: Likewise. * mangle.c: Likewise. * method.c: Likewise. * name-lookup.c: Likewise. * optimize.c: Likewise. * parser.c: Likewise. * pt.c: Likewise. * ptree.c: Likewise. * repo.c: Likewise. * rtti.c: Likewise. * search.c: Likewise. * semantics.c: Likewise. * tree.c: Likewise. * typeck.c: Likewise. * typeck2.c: Likewise. fortran 2015-07-07 Andrew MacLeod <amacleod@redhat.com> * convert.c: Adjust includes. * cpp.c: Likewise. * decl.c: Likewise. * f95-lang.c: Likewise. * iresolve.c: Likewise. * match.c: Likewise. * module.c: Likewise. * options.c: Likewise. * target-memory.c: Likewise. * trans-array.c: Likewise. * trans-common.c: Likewise. * trans-const.c: Likewise. * trans-decl.c: Likewise. * trans-expr.c: Likewise. * trans-intrinsic.c: Likewise. * trans-io.c: Likewise. * trans-openmp.c: Likewise. * trans-stmt.c: Likewise. * trans-types.c: Likewise. * trans.c: Likewise. go 2015-07-07 Andrew MacLeod <amacleod@redhat.com> * go-backend.c: Adjust includes. * go-gcc.cc: Likewise. * go-lang.c: Likewise. java 2015-07-07 Andrew MacLeod <amacleod@redhat.com> * boehm.c: Adjust includes. * builtins.c: Likewise. * class.c: Likewise. * constants.c: Likewise. * decl.c: Likewise. * except.c: Likewise. * expr.c: Likewise. * java-gimplify.c: Likewise. * jcf-dump.c: Likewise. * jcf-io.c: Likewise. * jcf-parse.c: Likewise. * jvgenmain.c: Likewise. * lang.c: Likewise. * mangle.c: Likewise. * mangle_name.c: Likewise. * resource.c: Likewise. * typeck.c: Likewise. * verify-glue.c: Likewise. jit 2015-07-07 Andrew MacLeod <amacleod@redhat.com> * dummy-frontend.c: Adjust includes. * jit-common.h: Likewise. * jit-playback.c: Likewise. lto 2015-07-07 Andrew MacLeod <amacleod@redhat.com> * lto-lang.c: Adjust includes. * lto-object.c: Likewise. * lto-partition.c: Likewise. * lto-symtab.c: Likewise. * lto.c: Likewise. objc 2015-07-07 Andrew MacLeod <amacleod@redhat.com> * objc-act.c: Adjust includes. * objc-encoding.c: Likewise. * objc-gnu-runtime-abi-01.c: Likewise. * objc-lang.c: Likewise. * objc-map.c: Likewise. * objc-next-runtime-abi-01.c: Likewise. * objc-next-runtime-abi-02.c: Likewise. * objc-runtime-shared-support.c: Likewise. objcp 2015-07-07 Andrew MacLeod <amacleod@redhat.com> * objcp-decl.c: Adjust includes. * objcp-lang.c: Likewise. From-SVN: r225531
1261 lines
34 KiB
C
1261 lines
34 KiB
C
/* DDG - Data Dependence Graph implementation.
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Copyright (C) 2004-2015 Free Software Foundation, Inc.
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Contributed by Ayal Zaks and Mustafa Hagog <zaks,mustafa@il.ibm.com>
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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 3, 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 COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "backend.h"
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#include "tree.h"
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#include "rtl.h"
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#include "df.h"
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#include "diagnostic-core.h"
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#include "tm_p.h"
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#include "regs.h"
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#include "flags.h"
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#include "insn-config.h"
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#include "insn-attr.h"
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#include "except.h"
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#include "recog.h"
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#include "sched-int.h"
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#include "target.h"
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#include "cfgloop.h"
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#include "alias.h"
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#include "expmed.h"
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#include "dojump.h"
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#include "explow.h"
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#include "calls.h"
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#include "emit-rtl.h"
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#include "varasm.h"
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#include "stmt.h"
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#include "expr.h"
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#include "ddg.h"
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#include "rtl-iter.h"
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#ifdef INSN_SCHEDULING
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/* A flag indicating that a ddg edge belongs to an SCC or not. */
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enum edge_flag {NOT_IN_SCC = 0, IN_SCC};
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/* Forward declarations. */
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static void add_backarc_to_ddg (ddg_ptr, ddg_edge_ptr);
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static void add_backarc_to_scc (ddg_scc_ptr, ddg_edge_ptr);
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static void add_scc_to_ddg (ddg_all_sccs_ptr, ddg_scc_ptr);
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static void create_ddg_dep_from_intra_loop_link (ddg_ptr, ddg_node_ptr,
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ddg_node_ptr, dep_t);
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static void create_ddg_dep_no_link (ddg_ptr, ddg_node_ptr, ddg_node_ptr,
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dep_type, dep_data_type, int);
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static ddg_edge_ptr create_ddg_edge (ddg_node_ptr, ddg_node_ptr, dep_type,
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dep_data_type, int, int);
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static void add_edge_to_ddg (ddg_ptr g, ddg_edge_ptr);
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/* Auxiliary variable for mem_read_insn_p/mem_write_insn_p. */
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static bool mem_ref_p;
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/* Auxiliary function for mem_read_insn_p. */
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static void
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mark_mem_use (rtx *x, void *)
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{
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subrtx_iterator::array_type array;
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FOR_EACH_SUBRTX (iter, array, *x, NONCONST)
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if (MEM_P (*iter))
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{
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mem_ref_p = true;
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break;
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}
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}
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/* Returns nonzero if INSN reads from memory. */
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static bool
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mem_read_insn_p (rtx_insn *insn)
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{
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mem_ref_p = false;
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note_uses (&PATTERN (insn), mark_mem_use, NULL);
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return mem_ref_p;
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}
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static void
|
||
mark_mem_store (rtx loc, const_rtx setter ATTRIBUTE_UNUSED, void *data ATTRIBUTE_UNUSED)
|
||
{
|
||
if (MEM_P (loc))
|
||
mem_ref_p = true;
|
||
}
|
||
|
||
/* Returns nonzero if INSN writes to memory. */
|
||
static bool
|
||
mem_write_insn_p (rtx_insn *insn)
|
||
{
|
||
mem_ref_p = false;
|
||
note_stores (PATTERN (insn), mark_mem_store, NULL);
|
||
return mem_ref_p;
|
||
}
|
||
|
||
/* Returns nonzero if X has access to memory. */
|
||
static bool
|
||
rtx_mem_access_p (rtx x)
|
||
{
|
||
int i, j;
|
||
const char *fmt;
|
||
enum rtx_code code;
|
||
|
||
if (x == 0)
|
||
return false;
|
||
|
||
if (MEM_P (x))
|
||
return true;
|
||
|
||
code = GET_CODE (x);
|
||
fmt = GET_RTX_FORMAT (code);
|
||
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
|
||
{
|
||
if (fmt[i] == 'e')
|
||
{
|
||
if (rtx_mem_access_p (XEXP (x, i)))
|
||
return true;
|
||
}
|
||
else if (fmt[i] == 'E')
|
||
for (j = 0; j < XVECLEN (x, i); j++)
|
||
{
|
||
if (rtx_mem_access_p (XVECEXP (x, i, j)))
|
||
return true;
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/* Returns nonzero if INSN reads to or writes from memory. */
|
||
static bool
|
||
mem_access_insn_p (rtx_insn *insn)
|
||
{
|
||
return rtx_mem_access_p (PATTERN (insn));
|
||
}
|
||
|
||
/* Return true if DEF_INSN contains address being auto-inc or auto-dec
|
||
which is used in USE_INSN. Otherwise return false. The result is
|
||
being used to decide whether to remove the edge between def_insn and
|
||
use_insn when -fmodulo-sched-allow-regmoves is set. This function
|
||
doesn't need to consider the specific address register; no reg_moves
|
||
will be allowed for any life range defined by def_insn and used
|
||
by use_insn, if use_insn uses an address register auto-inc'ed by
|
||
def_insn. */
|
||
bool
|
||
autoinc_var_is_used_p (rtx_insn *def_insn, rtx_insn *use_insn)
|
||
{
|
||
rtx note;
|
||
|
||
for (note = REG_NOTES (def_insn); note; note = XEXP (note, 1))
|
||
if (REG_NOTE_KIND (note) == REG_INC
|
||
&& reg_referenced_p (XEXP (note, 0), PATTERN (use_insn)))
|
||
return true;
|
||
|
||
return false;
|
||
}
|
||
|
||
/* Return true if one of the definitions in INSN has MODE_CC. Otherwise
|
||
return false. */
|
||
static bool
|
||
def_has_ccmode_p (rtx_insn *insn)
|
||
{
|
||
df_ref def;
|
||
|
||
FOR_EACH_INSN_DEF (def, insn)
|
||
{
|
||
machine_mode mode = GET_MODE (DF_REF_REG (def));
|
||
|
||
if (GET_MODE_CLASS (mode) == MODE_CC)
|
||
return true;
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
/* Computes the dependence parameters (latency, distance etc.), creates
|
||
a ddg_edge and adds it to the given DDG. */
|
||
static void
|
||
create_ddg_dep_from_intra_loop_link (ddg_ptr g, ddg_node_ptr src_node,
|
||
ddg_node_ptr dest_node, dep_t link)
|
||
{
|
||
ddg_edge_ptr e;
|
||
int latency, distance = 0;
|
||
dep_type t = TRUE_DEP;
|
||
dep_data_type dt = (mem_access_insn_p (src_node->insn)
|
||
&& mem_access_insn_p (dest_node->insn) ? MEM_DEP
|
||
: REG_DEP);
|
||
gcc_assert (src_node->cuid < dest_node->cuid);
|
||
gcc_assert (link);
|
||
|
||
/* Note: REG_DEP_ANTI applies to MEM ANTI_DEP as well!! */
|
||
if (DEP_TYPE (link) == REG_DEP_ANTI)
|
||
t = ANTI_DEP;
|
||
else if (DEP_TYPE (link) == REG_DEP_OUTPUT)
|
||
t = OUTPUT_DEP;
|
||
|
||
gcc_assert (!DEBUG_INSN_P (dest_node->insn) || t == ANTI_DEP);
|
||
gcc_assert (!DEBUG_INSN_P (src_node->insn) || t == ANTI_DEP);
|
||
|
||
/* We currently choose not to create certain anti-deps edges and
|
||
compensate for that by generating reg-moves based on the life-range
|
||
analysis. The anti-deps that will be deleted are the ones which
|
||
have true-deps edges in the opposite direction (in other words
|
||
the kernel has only one def of the relevant register).
|
||
If the address that is being auto-inc or auto-dec in DEST_NODE
|
||
is used in SRC_NODE then do not remove the edge to make sure
|
||
reg-moves will not be created for this address.
|
||
TODO: support the removal of all anti-deps edges, i.e. including those
|
||
whose register has multiple defs in the loop. */
|
||
if (flag_modulo_sched_allow_regmoves
|
||
&& (t == ANTI_DEP && dt == REG_DEP)
|
||
&& !def_has_ccmode_p (dest_node->insn)
|
||
&& !autoinc_var_is_used_p (dest_node->insn, src_node->insn))
|
||
{
|
||
rtx set;
|
||
|
||
set = single_set (dest_node->insn);
|
||
/* TODO: Handle registers that REG_P is not true for them, i.e.
|
||
subregs and special registers. */
|
||
if (set && REG_P (SET_DEST (set)))
|
||
{
|
||
int regno = REGNO (SET_DEST (set));
|
||
df_ref first_def;
|
||
struct df_rd_bb_info *bb_info = DF_RD_BB_INFO (g->bb);
|
||
|
||
first_def = df_bb_regno_first_def_find (g->bb, regno);
|
||
gcc_assert (first_def);
|
||
|
||
if (bitmap_bit_p (&bb_info->gen, DF_REF_ID (first_def)))
|
||
return;
|
||
}
|
||
}
|
||
|
||
latency = dep_cost (link);
|
||
e = create_ddg_edge (src_node, dest_node, t, dt, latency, distance);
|
||
add_edge_to_ddg (g, e);
|
||
}
|
||
|
||
/* The same as the above function, but it doesn't require a link parameter. */
|
||
static void
|
||
create_ddg_dep_no_link (ddg_ptr g, ddg_node_ptr from, ddg_node_ptr to,
|
||
dep_type d_t, dep_data_type d_dt, int distance)
|
||
{
|
||
ddg_edge_ptr e;
|
||
int l;
|
||
enum reg_note dep_kind;
|
||
struct _dep _dep, *dep = &_dep;
|
||
|
||
gcc_assert (!DEBUG_INSN_P (to->insn) || d_t == ANTI_DEP);
|
||
gcc_assert (!DEBUG_INSN_P (from->insn) || d_t == ANTI_DEP);
|
||
|
||
if (d_t == ANTI_DEP)
|
||
dep_kind = REG_DEP_ANTI;
|
||
else if (d_t == OUTPUT_DEP)
|
||
dep_kind = REG_DEP_OUTPUT;
|
||
else
|
||
{
|
||
gcc_assert (d_t == TRUE_DEP);
|
||
|
||
dep_kind = REG_DEP_TRUE;
|
||
}
|
||
|
||
init_dep (dep, from->insn, to->insn, dep_kind);
|
||
|
||
l = dep_cost (dep);
|
||
|
||
e = create_ddg_edge (from, to, d_t, d_dt, l, distance);
|
||
if (distance > 0)
|
||
add_backarc_to_ddg (g, e);
|
||
else
|
||
add_edge_to_ddg (g, e);
|
||
}
|
||
|
||
|
||
/* Given a downwards exposed register def LAST_DEF (which is the last
|
||
definition of that register in the bb), add inter-loop true dependences
|
||
to all its uses in the next iteration, an output dependence to the
|
||
first def of the same register (possibly itself) in the next iteration
|
||
and anti-dependences from its uses in the current iteration to the
|
||
first definition in the next iteration. */
|
||
static void
|
||
add_cross_iteration_register_deps (ddg_ptr g, df_ref last_def)
|
||
{
|
||
int regno = DF_REF_REGNO (last_def);
|
||
struct df_link *r_use;
|
||
int has_use_in_bb_p = false;
|
||
rtx_insn *def_insn = DF_REF_INSN (last_def);
|
||
ddg_node_ptr last_def_node = get_node_of_insn (g, def_insn);
|
||
ddg_node_ptr use_node;
|
||
#ifdef ENABLE_CHECKING
|
||
struct df_rd_bb_info *bb_info = DF_RD_BB_INFO (g->bb);
|
||
#endif
|
||
df_ref first_def = df_bb_regno_first_def_find (g->bb, regno);
|
||
|
||
gcc_assert (last_def_node);
|
||
gcc_assert (first_def);
|
||
|
||
#ifdef ENABLE_CHECKING
|
||
if (DF_REF_ID (last_def) != DF_REF_ID (first_def))
|
||
gcc_assert (!bitmap_bit_p (&bb_info->gen,
|
||
DF_REF_ID (first_def)));
|
||
#endif
|
||
|
||
/* Create inter-loop true dependences and anti dependences. */
|
||
for (r_use = DF_REF_CHAIN (last_def); r_use != NULL; r_use = r_use->next)
|
||
{
|
||
rtx_insn *use_insn = DF_REF_INSN (r_use->ref);
|
||
|
||
if (BLOCK_FOR_INSN (use_insn) != g->bb)
|
||
continue;
|
||
|
||
/* ??? Do not handle uses with DF_REF_IN_NOTE notes. */
|
||
use_node = get_node_of_insn (g, use_insn);
|
||
gcc_assert (use_node);
|
||
has_use_in_bb_p = true;
|
||
if (use_node->cuid <= last_def_node->cuid)
|
||
{
|
||
/* Add true deps from last_def to it's uses in the next
|
||
iteration. Any such upwards exposed use appears before
|
||
the last_def def. */
|
||
create_ddg_dep_no_link (g, last_def_node, use_node,
|
||
DEBUG_INSN_P (use_insn) ? ANTI_DEP : TRUE_DEP,
|
||
REG_DEP, 1);
|
||
}
|
||
else if (!DEBUG_INSN_P (use_insn))
|
||
{
|
||
/* Add anti deps from last_def's uses in the current iteration
|
||
to the first def in the next iteration. We do not add ANTI
|
||
dep when there is an intra-loop TRUE dep in the opposite
|
||
direction, but use regmoves to fix such disregarded ANTI
|
||
deps when broken. If the first_def reaches the USE then
|
||
there is such a dep. */
|
||
ddg_node_ptr first_def_node = get_node_of_insn (g,
|
||
DF_REF_INSN (first_def));
|
||
|
||
gcc_assert (first_def_node);
|
||
|
||
/* Always create the edge if the use node is a branch in
|
||
order to prevent the creation of reg-moves.
|
||
If the address that is being auto-inc or auto-dec in LAST_DEF
|
||
is used in USE_INSN then do not remove the edge to make sure
|
||
reg-moves will not be created for that address. */
|
||
if (DF_REF_ID (last_def) != DF_REF_ID (first_def)
|
||
|| !flag_modulo_sched_allow_regmoves
|
||
|| JUMP_P (use_node->insn)
|
||
|| autoinc_var_is_used_p (DF_REF_INSN (last_def), use_insn)
|
||
|| def_has_ccmode_p (DF_REF_INSN (last_def)))
|
||
create_ddg_dep_no_link (g, use_node, first_def_node, ANTI_DEP,
|
||
REG_DEP, 1);
|
||
|
||
}
|
||
}
|
||
/* Create an inter-loop output dependence between LAST_DEF (which is the
|
||
last def in its block, being downwards exposed) and the first def in
|
||
its block. Avoid creating a self output dependence. Avoid creating
|
||
an output dependence if there is a dependence path between the two
|
||
defs starting with a true dependence to a use which can be in the
|
||
next iteration; followed by an anti dependence of that use to the
|
||
first def (i.e. if there is a use between the two defs.) */
|
||
if (!has_use_in_bb_p)
|
||
{
|
||
ddg_node_ptr dest_node;
|
||
|
||
if (DF_REF_ID (last_def) == DF_REF_ID (first_def))
|
||
return;
|
||
|
||
dest_node = get_node_of_insn (g, DF_REF_INSN (first_def));
|
||
gcc_assert (dest_node);
|
||
create_ddg_dep_no_link (g, last_def_node, dest_node,
|
||
OUTPUT_DEP, REG_DEP, 1);
|
||
}
|
||
}
|
||
/* Build inter-loop dependencies, by looking at DF analysis backwards. */
|
||
static void
|
||
build_inter_loop_deps (ddg_ptr g)
|
||
{
|
||
unsigned rd_num;
|
||
struct df_rd_bb_info *rd_bb_info;
|
||
bitmap_iterator bi;
|
||
|
||
rd_bb_info = DF_RD_BB_INFO (g->bb);
|
||
|
||
/* Find inter-loop register output, true and anti deps. */
|
||
EXECUTE_IF_SET_IN_BITMAP (&rd_bb_info->gen, 0, rd_num, bi)
|
||
{
|
||
df_ref rd = DF_DEFS_GET (rd_num);
|
||
|
||
add_cross_iteration_register_deps (g, rd);
|
||
}
|
||
}
|
||
|
||
|
||
/* Return true if two specified instructions have mem expr with conflict
|
||
alias sets. */
|
||
static bool
|
||
insns_may_alias_p (rtx_insn *insn1, rtx_insn *insn2)
|
||
{
|
||
subrtx_iterator::array_type array1;
|
||
subrtx_iterator::array_type array2;
|
||
FOR_EACH_SUBRTX (iter1, array1, PATTERN (insn1), NONCONST)
|
||
{
|
||
const_rtx x1 = *iter1;
|
||
if (MEM_P (x1))
|
||
FOR_EACH_SUBRTX (iter2, array2, PATTERN (insn2), NONCONST)
|
||
{
|
||
const_rtx x2 = *iter2;
|
||
if (MEM_P (x2) && may_alias_p (x2, x1))
|
||
return true;
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/* Given two nodes, analyze their RTL insns and add intra-loop mem deps
|
||
to ddg G. */
|
||
static void
|
||
add_intra_loop_mem_dep (ddg_ptr g, ddg_node_ptr from, ddg_node_ptr to)
|
||
{
|
||
|
||
if ((from->cuid == to->cuid)
|
||
|| !insns_may_alias_p (from->insn, to->insn))
|
||
/* Do not create edge if memory references have disjoint alias sets
|
||
or 'to' and 'from' are the same instruction. */
|
||
return;
|
||
|
||
if (mem_write_insn_p (from->insn))
|
||
{
|
||
if (mem_read_insn_p (to->insn))
|
||
create_ddg_dep_no_link (g, from, to,
|
||
DEBUG_INSN_P (to->insn)
|
||
? ANTI_DEP : TRUE_DEP, MEM_DEP, 0);
|
||
else
|
||
create_ddg_dep_no_link (g, from, to,
|
||
DEBUG_INSN_P (to->insn)
|
||
? ANTI_DEP : OUTPUT_DEP, MEM_DEP, 0);
|
||
}
|
||
else if (!mem_read_insn_p (to->insn))
|
||
create_ddg_dep_no_link (g, from, to, ANTI_DEP, MEM_DEP, 0);
|
||
}
|
||
|
||
/* Given two nodes, analyze their RTL insns and add inter-loop mem deps
|
||
to ddg G. */
|
||
static void
|
||
add_inter_loop_mem_dep (ddg_ptr g, ddg_node_ptr from, ddg_node_ptr to)
|
||
{
|
||
if (!insns_may_alias_p (from->insn, to->insn))
|
||
/* Do not create edge if memory references have disjoint alias sets. */
|
||
return;
|
||
|
||
if (mem_write_insn_p (from->insn))
|
||
{
|
||
if (mem_read_insn_p (to->insn))
|
||
create_ddg_dep_no_link (g, from, to,
|
||
DEBUG_INSN_P (to->insn)
|
||
? ANTI_DEP : TRUE_DEP, MEM_DEP, 1);
|
||
else if (from->cuid != to->cuid)
|
||
create_ddg_dep_no_link (g, from, to,
|
||
DEBUG_INSN_P (to->insn)
|
||
? ANTI_DEP : OUTPUT_DEP, MEM_DEP, 1);
|
||
}
|
||
else
|
||
{
|
||
if (mem_read_insn_p (to->insn))
|
||
return;
|
||
else if (from->cuid != to->cuid)
|
||
{
|
||
create_ddg_dep_no_link (g, from, to, ANTI_DEP, MEM_DEP, 1);
|
||
if (DEBUG_INSN_P (from->insn) || DEBUG_INSN_P (to->insn))
|
||
create_ddg_dep_no_link (g, to, from, ANTI_DEP, MEM_DEP, 1);
|
||
else
|
||
create_ddg_dep_no_link (g, to, from, TRUE_DEP, MEM_DEP, 1);
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/* Perform intra-block Data Dependency analysis and connect the nodes in
|
||
the DDG. We assume the loop has a single basic block. */
|
||
static void
|
||
build_intra_loop_deps (ddg_ptr g)
|
||
{
|
||
int i;
|
||
/* Hold the dependency analysis state during dependency calculations. */
|
||
struct deps_desc tmp_deps;
|
||
rtx_insn *head, *tail;
|
||
|
||
/* Build the dependence information, using the sched_analyze function. */
|
||
init_deps_global ();
|
||
init_deps (&tmp_deps, false);
|
||
|
||
/* Do the intra-block data dependence analysis for the given block. */
|
||
get_ebb_head_tail (g->bb, g->bb, &head, &tail);
|
||
sched_analyze (&tmp_deps, head, tail);
|
||
|
||
/* Build intra-loop data dependencies using the scheduler dependency
|
||
analysis. */
|
||
for (i = 0; i < g->num_nodes; i++)
|
||
{
|
||
ddg_node_ptr dest_node = &g->nodes[i];
|
||
sd_iterator_def sd_it;
|
||
dep_t dep;
|
||
|
||
if (! INSN_P (dest_node->insn))
|
||
continue;
|
||
|
||
FOR_EACH_DEP (dest_node->insn, SD_LIST_BACK, sd_it, dep)
|
||
{
|
||
rtx_insn *src_insn = DEP_PRO (dep);
|
||
ddg_node_ptr src_node;
|
||
|
||
/* Don't add dependencies on debug insns to non-debug insns
|
||
to avoid codegen differences between -g and -g0. */
|
||
if (DEBUG_INSN_P (src_insn) && !DEBUG_INSN_P (dest_node->insn))
|
||
continue;
|
||
|
||
src_node = get_node_of_insn (g, src_insn);
|
||
|
||
if (!src_node)
|
||
continue;
|
||
|
||
create_ddg_dep_from_intra_loop_link (g, src_node, dest_node, dep);
|
||
}
|
||
|
||
/* If this insn modifies memory, add an edge to all insns that access
|
||
memory. */
|
||
if (mem_access_insn_p (dest_node->insn))
|
||
{
|
||
int j;
|
||
|
||
for (j = 0; j <= i; j++)
|
||
{
|
||
ddg_node_ptr j_node = &g->nodes[j];
|
||
if (DEBUG_INSN_P (j_node->insn))
|
||
continue;
|
||
if (mem_access_insn_p (j_node->insn))
|
||
{
|
||
/* Don't bother calculating inter-loop dep if an intra-loop dep
|
||
already exists. */
|
||
if (! bitmap_bit_p (dest_node->successors, j))
|
||
add_inter_loop_mem_dep (g, dest_node, j_node);
|
||
/* If -fmodulo-sched-allow-regmoves
|
||
is set certain anti-dep edges are not created.
|
||
It might be that these anti-dep edges are on the
|
||
path from one memory instruction to another such that
|
||
removing these edges could cause a violation of the
|
||
memory dependencies. Thus we add intra edges between
|
||
every two memory instructions in this case. */
|
||
if (flag_modulo_sched_allow_regmoves
|
||
&& !bitmap_bit_p (dest_node->predecessors, j))
|
||
add_intra_loop_mem_dep (g, j_node, dest_node);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Free the INSN_LISTs. */
|
||
finish_deps_global ();
|
||
free_deps (&tmp_deps);
|
||
|
||
/* Free dependencies. */
|
||
sched_free_deps (head, tail, false);
|
||
}
|
||
|
||
|
||
/* Given a basic block, create its DDG and return a pointer to a variable
|
||
of ddg type that represents it.
|
||
Initialize the ddg structure fields to the appropriate values. */
|
||
ddg_ptr
|
||
create_ddg (basic_block bb, int closing_branch_deps)
|
||
{
|
||
ddg_ptr g;
|
||
rtx_insn *insn, *first_note;
|
||
int i;
|
||
int num_nodes = 0;
|
||
|
||
g = (ddg_ptr) xcalloc (1, sizeof (struct ddg));
|
||
|
||
g->bb = bb;
|
||
g->closing_branch_deps = closing_branch_deps;
|
||
|
||
/* Count the number of insns in the BB. */
|
||
for (insn = BB_HEAD (bb); insn != NEXT_INSN (BB_END (bb));
|
||
insn = NEXT_INSN (insn))
|
||
{
|
||
if (! INSN_P (insn) || GET_CODE (PATTERN (insn)) == USE)
|
||
continue;
|
||
|
||
if (DEBUG_INSN_P (insn))
|
||
g->num_debug++;
|
||
else
|
||
{
|
||
if (mem_read_insn_p (insn))
|
||
g->num_loads++;
|
||
if (mem_write_insn_p (insn))
|
||
g->num_stores++;
|
||
}
|
||
num_nodes++;
|
||
}
|
||
|
||
/* There is nothing to do for this BB. */
|
||
if ((num_nodes - g->num_debug) <= 1)
|
||
{
|
||
free (g);
|
||
return NULL;
|
||
}
|
||
|
||
/* Allocate the nodes array, and initialize the nodes. */
|
||
g->num_nodes = num_nodes;
|
||
g->nodes = (ddg_node_ptr) xcalloc (num_nodes, sizeof (struct ddg_node));
|
||
g->closing_branch = NULL;
|
||
i = 0;
|
||
first_note = NULL;
|
||
for (insn = BB_HEAD (bb); insn != NEXT_INSN (BB_END (bb));
|
||
insn = NEXT_INSN (insn))
|
||
{
|
||
if (! INSN_P (insn))
|
||
{
|
||
if (! first_note && NOTE_P (insn)
|
||
&& NOTE_KIND (insn) != NOTE_INSN_BASIC_BLOCK)
|
||
first_note = insn;
|
||
continue;
|
||
}
|
||
if (JUMP_P (insn))
|
||
{
|
||
gcc_assert (!g->closing_branch);
|
||
g->closing_branch = &g->nodes[i];
|
||
}
|
||
else if (GET_CODE (PATTERN (insn)) == USE)
|
||
{
|
||
if (! first_note)
|
||
first_note = insn;
|
||
continue;
|
||
}
|
||
|
||
g->nodes[i].cuid = i;
|
||
g->nodes[i].successors = sbitmap_alloc (num_nodes);
|
||
bitmap_clear (g->nodes[i].successors);
|
||
g->nodes[i].predecessors = sbitmap_alloc (num_nodes);
|
||
bitmap_clear (g->nodes[i].predecessors);
|
||
g->nodes[i].first_note = (first_note ? first_note : insn);
|
||
g->nodes[i++].insn = insn;
|
||
first_note = NULL;
|
||
}
|
||
|
||
/* We must have found a branch in DDG. */
|
||
gcc_assert (g->closing_branch);
|
||
|
||
|
||
/* Build the data dependency graph. */
|
||
build_intra_loop_deps (g);
|
||
build_inter_loop_deps (g);
|
||
return g;
|
||
}
|
||
|
||
/* Free all the memory allocated for the DDG. */
|
||
void
|
||
free_ddg (ddg_ptr g)
|
||
{
|
||
int i;
|
||
|
||
if (!g)
|
||
return;
|
||
|
||
for (i = 0; i < g->num_nodes; i++)
|
||
{
|
||
ddg_edge_ptr e = g->nodes[i].out;
|
||
|
||
while (e)
|
||
{
|
||
ddg_edge_ptr next = e->next_out;
|
||
|
||
free (e);
|
||
e = next;
|
||
}
|
||
sbitmap_free (g->nodes[i].successors);
|
||
sbitmap_free (g->nodes[i].predecessors);
|
||
}
|
||
if (g->num_backarcs > 0)
|
||
free (g->backarcs);
|
||
free (g->nodes);
|
||
free (g);
|
||
}
|
||
|
||
void
|
||
print_ddg_edge (FILE *file, ddg_edge_ptr e)
|
||
{
|
||
char dep_c;
|
||
|
||
switch (e->type)
|
||
{
|
||
case OUTPUT_DEP :
|
||
dep_c = 'O';
|
||
break;
|
||
case ANTI_DEP :
|
||
dep_c = 'A';
|
||
break;
|
||
default:
|
||
dep_c = 'T';
|
||
}
|
||
|
||
fprintf (file, " [%d -(%c,%d,%d)-> %d] ", INSN_UID (e->src->insn),
|
||
dep_c, e->latency, e->distance, INSN_UID (e->dest->insn));
|
||
}
|
||
|
||
/* Print the DDG nodes with there in/out edges to the dump file. */
|
||
void
|
||
print_ddg (FILE *file, ddg_ptr g)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < g->num_nodes; i++)
|
||
{
|
||
ddg_edge_ptr e;
|
||
|
||
fprintf (file, "Node num: %d\n", g->nodes[i].cuid);
|
||
print_rtl_single (file, g->nodes[i].insn);
|
||
fprintf (file, "OUT ARCS: ");
|
||
for (e = g->nodes[i].out; e; e = e->next_out)
|
||
print_ddg_edge (file, e);
|
||
|
||
fprintf (file, "\nIN ARCS: ");
|
||
for (e = g->nodes[i].in; e; e = e->next_in)
|
||
print_ddg_edge (file, e);
|
||
|
||
fprintf (file, "\n");
|
||
}
|
||
}
|
||
|
||
/* Print the given DDG in VCG format. */
|
||
DEBUG_FUNCTION void
|
||
vcg_print_ddg (FILE *file, ddg_ptr g)
|
||
{
|
||
int src_cuid;
|
||
|
||
fprintf (file, "graph: {\n");
|
||
for (src_cuid = 0; src_cuid < g->num_nodes; src_cuid++)
|
||
{
|
||
ddg_edge_ptr e;
|
||
int src_uid = INSN_UID (g->nodes[src_cuid].insn);
|
||
|
||
fprintf (file, "node: {title: \"%d_%d\" info1: \"", src_cuid, src_uid);
|
||
print_rtl_single (file, g->nodes[src_cuid].insn);
|
||
fprintf (file, "\"}\n");
|
||
for (e = g->nodes[src_cuid].out; e; e = e->next_out)
|
||
{
|
||
int dst_uid = INSN_UID (e->dest->insn);
|
||
int dst_cuid = e->dest->cuid;
|
||
|
||
/* Give the backarcs a different color. */
|
||
if (e->distance > 0)
|
||
fprintf (file, "backedge: {color: red ");
|
||
else
|
||
fprintf (file, "edge: { ");
|
||
|
||
fprintf (file, "sourcename: \"%d_%d\" ", src_cuid, src_uid);
|
||
fprintf (file, "targetname: \"%d_%d\" ", dst_cuid, dst_uid);
|
||
fprintf (file, "label: \"%d_%d\"}\n", e->latency, e->distance);
|
||
}
|
||
}
|
||
fprintf (file, "}\n");
|
||
}
|
||
|
||
/* Dump the sccs in SCCS. */
|
||
void
|
||
print_sccs (FILE *file, ddg_all_sccs_ptr sccs, ddg_ptr g)
|
||
{
|
||
unsigned int u = 0;
|
||
sbitmap_iterator sbi;
|
||
int i;
|
||
|
||
if (!file)
|
||
return;
|
||
|
||
fprintf (file, "\n;; Number of SCC nodes - %d\n", sccs->num_sccs);
|
||
for (i = 0; i < sccs->num_sccs; i++)
|
||
{
|
||
fprintf (file, "SCC number: %d\n", i);
|
||
EXECUTE_IF_SET_IN_BITMAP (sccs->sccs[i]->nodes, 0, u, sbi)
|
||
{
|
||
fprintf (file, "insn num %d\n", u);
|
||
print_rtl_single (file, g->nodes[u].insn);
|
||
}
|
||
}
|
||
fprintf (file, "\n");
|
||
}
|
||
|
||
/* Create an edge and initialize it with given values. */
|
||
static ddg_edge_ptr
|
||
create_ddg_edge (ddg_node_ptr src, ddg_node_ptr dest,
|
||
dep_type t, dep_data_type dt, int l, int d)
|
||
{
|
||
ddg_edge_ptr e = (ddg_edge_ptr) xmalloc (sizeof (struct ddg_edge));
|
||
|
||
e->src = src;
|
||
e->dest = dest;
|
||
e->type = t;
|
||
e->data_type = dt;
|
||
e->latency = l;
|
||
e->distance = d;
|
||
e->next_in = e->next_out = NULL;
|
||
e->aux.info = 0;
|
||
return e;
|
||
}
|
||
|
||
/* Add the given edge to the in/out linked lists of the DDG nodes. */
|
||
static void
|
||
add_edge_to_ddg (ddg_ptr g ATTRIBUTE_UNUSED, ddg_edge_ptr e)
|
||
{
|
||
ddg_node_ptr src = e->src;
|
||
ddg_node_ptr dest = e->dest;
|
||
|
||
/* Should have allocated the sbitmaps. */
|
||
gcc_assert (src->successors && dest->predecessors);
|
||
|
||
bitmap_set_bit (src->successors, dest->cuid);
|
||
bitmap_set_bit (dest->predecessors, src->cuid);
|
||
e->next_in = dest->in;
|
||
dest->in = e;
|
||
e->next_out = src->out;
|
||
src->out = e;
|
||
}
|
||
|
||
|
||
|
||
/* Algorithm for computing the recurrence_length of an scc. We assume at
|
||
for now that cycles in the data dependence graph contain a single backarc.
|
||
This simplifies the algorithm, and can be generalized later. */
|
||
static void
|
||
set_recurrence_length (ddg_scc_ptr scc, ddg_ptr g)
|
||
{
|
||
int j;
|
||
int result = -1;
|
||
|
||
for (j = 0; j < scc->num_backarcs; j++)
|
||
{
|
||
ddg_edge_ptr backarc = scc->backarcs[j];
|
||
int length;
|
||
int distance = backarc->distance;
|
||
ddg_node_ptr src = backarc->dest;
|
||
ddg_node_ptr dest = backarc->src;
|
||
|
||
length = longest_simple_path (g, src->cuid, dest->cuid, scc->nodes);
|
||
if (length < 0 )
|
||
{
|
||
/* fprintf (stderr, "Backarc not on simple cycle in SCC.\n"); */
|
||
continue;
|
||
}
|
||
length += backarc->latency;
|
||
result = MAX (result, (length / distance));
|
||
}
|
||
scc->recurrence_length = result;
|
||
}
|
||
|
||
/* Create a new SCC given the set of its nodes. Compute its recurrence_length
|
||
and mark edges that belong to this scc as IN_SCC. */
|
||
static ddg_scc_ptr
|
||
create_scc (ddg_ptr g, sbitmap nodes)
|
||
{
|
||
ddg_scc_ptr scc;
|
||
unsigned int u = 0;
|
||
sbitmap_iterator sbi;
|
||
|
||
scc = (ddg_scc_ptr) xmalloc (sizeof (struct ddg_scc));
|
||
scc->backarcs = NULL;
|
||
scc->num_backarcs = 0;
|
||
scc->nodes = sbitmap_alloc (g->num_nodes);
|
||
bitmap_copy (scc->nodes, nodes);
|
||
|
||
/* Mark the backarcs that belong to this SCC. */
|
||
EXECUTE_IF_SET_IN_BITMAP (nodes, 0, u, sbi)
|
||
{
|
||
ddg_edge_ptr e;
|
||
ddg_node_ptr n = &g->nodes[u];
|
||
|
||
for (e = n->out; e; e = e->next_out)
|
||
if (bitmap_bit_p (nodes, e->dest->cuid))
|
||
{
|
||
e->aux.count = IN_SCC;
|
||
if (e->distance > 0)
|
||
add_backarc_to_scc (scc, e);
|
||
}
|
||
}
|
||
|
||
set_recurrence_length (scc, g);
|
||
return scc;
|
||
}
|
||
|
||
/* Cleans the memory allocation of a given SCC. */
|
||
static void
|
||
free_scc (ddg_scc_ptr scc)
|
||
{
|
||
if (!scc)
|
||
return;
|
||
|
||
sbitmap_free (scc->nodes);
|
||
if (scc->num_backarcs > 0)
|
||
free (scc->backarcs);
|
||
free (scc);
|
||
}
|
||
|
||
|
||
/* Add a given edge known to be a backarc to the given DDG. */
|
||
static void
|
||
add_backarc_to_ddg (ddg_ptr g, ddg_edge_ptr e)
|
||
{
|
||
int size = (g->num_backarcs + 1) * sizeof (ddg_edge_ptr);
|
||
|
||
add_edge_to_ddg (g, e);
|
||
g->backarcs = (ddg_edge_ptr *) xrealloc (g->backarcs, size);
|
||
g->backarcs[g->num_backarcs++] = e;
|
||
}
|
||
|
||
/* Add backarc to an SCC. */
|
||
static void
|
||
add_backarc_to_scc (ddg_scc_ptr scc, ddg_edge_ptr e)
|
||
{
|
||
int size = (scc->num_backarcs + 1) * sizeof (ddg_edge_ptr);
|
||
|
||
scc->backarcs = (ddg_edge_ptr *) xrealloc (scc->backarcs, size);
|
||
scc->backarcs[scc->num_backarcs++] = e;
|
||
}
|
||
|
||
/* Add the given SCC to the DDG. */
|
||
static void
|
||
add_scc_to_ddg (ddg_all_sccs_ptr g, ddg_scc_ptr scc)
|
||
{
|
||
int size = (g->num_sccs + 1) * sizeof (ddg_scc_ptr);
|
||
|
||
g->sccs = (ddg_scc_ptr *) xrealloc (g->sccs, size);
|
||
g->sccs[g->num_sccs++] = scc;
|
||
}
|
||
|
||
/* Given the instruction INSN return the node that represents it. */
|
||
ddg_node_ptr
|
||
get_node_of_insn (ddg_ptr g, rtx_insn *insn)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < g->num_nodes; i++)
|
||
if (insn == g->nodes[i].insn)
|
||
return &g->nodes[i];
|
||
return NULL;
|
||
}
|
||
|
||
/* Given a set OPS of nodes in the DDG, find the set of their successors
|
||
which are not in OPS, and set their bits in SUCC. Bits corresponding to
|
||
OPS are cleared from SUCC. Leaves the other bits in SUCC unchanged. */
|
||
void
|
||
find_successors (sbitmap succ, ddg_ptr g, sbitmap ops)
|
||
{
|
||
unsigned int i = 0;
|
||
sbitmap_iterator sbi;
|
||
|
||
EXECUTE_IF_SET_IN_BITMAP (ops, 0, i, sbi)
|
||
{
|
||
const sbitmap node_succ = NODE_SUCCESSORS (&g->nodes[i]);
|
||
bitmap_ior (succ, succ, node_succ);
|
||
};
|
||
|
||
/* We want those that are not in ops. */
|
||
bitmap_and_compl (succ, succ, ops);
|
||
}
|
||
|
||
/* Given a set OPS of nodes in the DDG, find the set of their predecessors
|
||
which are not in OPS, and set their bits in PREDS. Bits corresponding to
|
||
OPS are cleared from PREDS. Leaves the other bits in PREDS unchanged. */
|
||
void
|
||
find_predecessors (sbitmap preds, ddg_ptr g, sbitmap ops)
|
||
{
|
||
unsigned int i = 0;
|
||
sbitmap_iterator sbi;
|
||
|
||
EXECUTE_IF_SET_IN_BITMAP (ops, 0, i, sbi)
|
||
{
|
||
const sbitmap node_preds = NODE_PREDECESSORS (&g->nodes[i]);
|
||
bitmap_ior (preds, preds, node_preds);
|
||
};
|
||
|
||
/* We want those that are not in ops. */
|
||
bitmap_and_compl (preds, preds, ops);
|
||
}
|
||
|
||
|
||
/* Compare function to be passed to qsort to order the backarcs in descending
|
||
recMII order. */
|
||
static int
|
||
compare_sccs (const void *s1, const void *s2)
|
||
{
|
||
const int rec_l1 = (*(const ddg_scc_ptr *)s1)->recurrence_length;
|
||
const int rec_l2 = (*(const ddg_scc_ptr *)s2)->recurrence_length;
|
||
return ((rec_l2 > rec_l1) - (rec_l2 < rec_l1));
|
||
|
||
}
|
||
|
||
/* Order the backarcs in descending recMII order using compare_sccs. */
|
||
static void
|
||
order_sccs (ddg_all_sccs_ptr g)
|
||
{
|
||
qsort (g->sccs, g->num_sccs, sizeof (ddg_scc_ptr),
|
||
(int (*) (const void *, const void *)) compare_sccs);
|
||
}
|
||
|
||
#ifdef ENABLE_CHECKING
|
||
/* Check that every node in SCCS belongs to exactly one strongly connected
|
||
component and that no element of SCCS is empty. */
|
||
static void
|
||
check_sccs (ddg_all_sccs_ptr sccs, int num_nodes)
|
||
{
|
||
int i = 0;
|
||
sbitmap tmp = sbitmap_alloc (num_nodes);
|
||
|
||
bitmap_clear (tmp);
|
||
for (i = 0; i < sccs->num_sccs; i++)
|
||
{
|
||
gcc_assert (!bitmap_empty_p (sccs->sccs[i]->nodes));
|
||
/* Verify that every node in sccs is in exactly one strongly
|
||
connected component. */
|
||
gcc_assert (!bitmap_intersect_p (tmp, sccs->sccs[i]->nodes));
|
||
bitmap_ior (tmp, tmp, sccs->sccs[i]->nodes);
|
||
}
|
||
sbitmap_free (tmp);
|
||
}
|
||
#endif
|
||
|
||
/* Perform the Strongly Connected Components decomposing algorithm on the
|
||
DDG and return DDG_ALL_SCCS structure that contains them. */
|
||
ddg_all_sccs_ptr
|
||
create_ddg_all_sccs (ddg_ptr g)
|
||
{
|
||
int i;
|
||
int num_nodes = g->num_nodes;
|
||
sbitmap from = sbitmap_alloc (num_nodes);
|
||
sbitmap to = sbitmap_alloc (num_nodes);
|
||
sbitmap scc_nodes = sbitmap_alloc (num_nodes);
|
||
ddg_all_sccs_ptr sccs = (ddg_all_sccs_ptr)
|
||
xmalloc (sizeof (struct ddg_all_sccs));
|
||
|
||
sccs->ddg = g;
|
||
sccs->sccs = NULL;
|
||
sccs->num_sccs = 0;
|
||
|
||
for (i = 0; i < g->num_backarcs; i++)
|
||
{
|
||
ddg_scc_ptr scc;
|
||
ddg_edge_ptr backarc = g->backarcs[i];
|
||
ddg_node_ptr src = backarc->src;
|
||
ddg_node_ptr dest = backarc->dest;
|
||
|
||
/* If the backarc already belongs to an SCC, continue. */
|
||
if (backarc->aux.count == IN_SCC)
|
||
continue;
|
||
|
||
bitmap_clear (scc_nodes);
|
||
bitmap_clear (from);
|
||
bitmap_clear (to);
|
||
bitmap_set_bit (from, dest->cuid);
|
||
bitmap_set_bit (to, src->cuid);
|
||
|
||
if (find_nodes_on_paths (scc_nodes, g, from, to))
|
||
{
|
||
scc = create_scc (g, scc_nodes);
|
||
add_scc_to_ddg (sccs, scc);
|
||
}
|
||
}
|
||
order_sccs (sccs);
|
||
sbitmap_free (from);
|
||
sbitmap_free (to);
|
||
sbitmap_free (scc_nodes);
|
||
#ifdef ENABLE_CHECKING
|
||
check_sccs (sccs, num_nodes);
|
||
#endif
|
||
return sccs;
|
||
}
|
||
|
||
/* Frees the memory allocated for all SCCs of the DDG, but keeps the DDG. */
|
||
void
|
||
free_ddg_all_sccs (ddg_all_sccs_ptr all_sccs)
|
||
{
|
||
int i;
|
||
|
||
if (!all_sccs)
|
||
return;
|
||
|
||
for (i = 0; i < all_sccs->num_sccs; i++)
|
||
free_scc (all_sccs->sccs[i]);
|
||
|
||
free (all_sccs->sccs);
|
||
free (all_sccs);
|
||
}
|
||
|
||
|
||
/* Given FROM - a bitmap of source nodes - and TO - a bitmap of destination
|
||
nodes - find all nodes that lie on paths from FROM to TO (not excluding
|
||
nodes from FROM and TO). Return nonzero if nodes exist. */
|
||
int
|
||
find_nodes_on_paths (sbitmap result, ddg_ptr g, sbitmap from, sbitmap to)
|
||
{
|
||
int answer;
|
||
int change;
|
||
unsigned int u = 0;
|
||
int num_nodes = g->num_nodes;
|
||
sbitmap_iterator sbi;
|
||
|
||
sbitmap workset = sbitmap_alloc (num_nodes);
|
||
sbitmap reachable_from = sbitmap_alloc (num_nodes);
|
||
sbitmap reach_to = sbitmap_alloc (num_nodes);
|
||
sbitmap tmp = sbitmap_alloc (num_nodes);
|
||
|
||
bitmap_copy (reachable_from, from);
|
||
bitmap_copy (tmp, from);
|
||
|
||
change = 1;
|
||
while (change)
|
||
{
|
||
change = 0;
|
||
bitmap_copy (workset, tmp);
|
||
bitmap_clear (tmp);
|
||
EXECUTE_IF_SET_IN_BITMAP (workset, 0, u, sbi)
|
||
{
|
||
ddg_edge_ptr e;
|
||
ddg_node_ptr u_node = &g->nodes[u];
|
||
|
||
for (e = u_node->out; e != (ddg_edge_ptr) 0; e = e->next_out)
|
||
{
|
||
ddg_node_ptr v_node = e->dest;
|
||
int v = v_node->cuid;
|
||
|
||
if (!bitmap_bit_p (reachable_from, v))
|
||
{
|
||
bitmap_set_bit (reachable_from, v);
|
||
bitmap_set_bit (tmp, v);
|
||
change = 1;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
bitmap_copy (reach_to, to);
|
||
bitmap_copy (tmp, to);
|
||
|
||
change = 1;
|
||
while (change)
|
||
{
|
||
change = 0;
|
||
bitmap_copy (workset, tmp);
|
||
bitmap_clear (tmp);
|
||
EXECUTE_IF_SET_IN_BITMAP (workset, 0, u, sbi)
|
||
{
|
||
ddg_edge_ptr e;
|
||
ddg_node_ptr u_node = &g->nodes[u];
|
||
|
||
for (e = u_node->in; e != (ddg_edge_ptr) 0; e = e->next_in)
|
||
{
|
||
ddg_node_ptr v_node = e->src;
|
||
int v = v_node->cuid;
|
||
|
||
if (!bitmap_bit_p (reach_to, v))
|
||
{
|
||
bitmap_set_bit (reach_to, v);
|
||
bitmap_set_bit (tmp, v);
|
||
change = 1;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
answer = bitmap_and (result, reachable_from, reach_to);
|
||
sbitmap_free (workset);
|
||
sbitmap_free (reachable_from);
|
||
sbitmap_free (reach_to);
|
||
sbitmap_free (tmp);
|
||
return answer;
|
||
}
|
||
|
||
|
||
/* Updates the counts of U_NODE's successors (that belong to NODES) to be
|
||
at-least as large as the count of U_NODE plus the latency between them.
|
||
Sets a bit in TMP for each successor whose count was changed (increased).
|
||
Returns nonzero if any count was changed. */
|
||
static int
|
||
update_dist_to_successors (ddg_node_ptr u_node, sbitmap nodes, sbitmap tmp)
|
||
{
|
||
ddg_edge_ptr e;
|
||
int result = 0;
|
||
|
||
for (e = u_node->out; e; e = e->next_out)
|
||
{
|
||
ddg_node_ptr v_node = e->dest;
|
||
int v = v_node->cuid;
|
||
|
||
if (bitmap_bit_p (nodes, v)
|
||
&& (e->distance == 0)
|
||
&& (v_node->aux.count < u_node->aux.count + e->latency))
|
||
{
|
||
v_node->aux.count = u_node->aux.count + e->latency;
|
||
bitmap_set_bit (tmp, v);
|
||
result = 1;
|
||
}
|
||
}
|
||
return result;
|
||
}
|
||
|
||
|
||
/* Find the length of a longest path from SRC to DEST in G,
|
||
going only through NODES, and disregarding backarcs. */
|
||
int
|
||
longest_simple_path (struct ddg * g, int src, int dest, sbitmap nodes)
|
||
{
|
||
int i;
|
||
unsigned int u = 0;
|
||
int change = 1;
|
||
int result;
|
||
int num_nodes = g->num_nodes;
|
||
sbitmap workset = sbitmap_alloc (num_nodes);
|
||
sbitmap tmp = sbitmap_alloc (num_nodes);
|
||
|
||
|
||
/* Data will hold the distance of the longest path found so far from
|
||
src to each node. Initialize to -1 = less than minimum. */
|
||
for (i = 0; i < g->num_nodes; i++)
|
||
g->nodes[i].aux.count = -1;
|
||
g->nodes[src].aux.count = 0;
|
||
|
||
bitmap_clear (tmp);
|
||
bitmap_set_bit (tmp, src);
|
||
|
||
while (change)
|
||
{
|
||
sbitmap_iterator sbi;
|
||
|
||
change = 0;
|
||
bitmap_copy (workset, tmp);
|
||
bitmap_clear (tmp);
|
||
EXECUTE_IF_SET_IN_BITMAP (workset, 0, u, sbi)
|
||
{
|
||
ddg_node_ptr u_node = &g->nodes[u];
|
||
|
||
change |= update_dist_to_successors (u_node, nodes, tmp);
|
||
}
|
||
}
|
||
result = g->nodes[dest].aux.count;
|
||
sbitmap_free (workset);
|
||
sbitmap_free (tmp);
|
||
return result;
|
||
}
|
||
|
||
#endif /* INSN_SCHEDULING */
|