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This pass interchanges loops to provide a more cache-friendly memory access. For e.g. given a loop like - for(int i=0;i<N;i++) for(int j=0;j<N;j++) A[j][i] = A[j][i]+B[j][i]; is interchanged to - for(int j=0;j<N;j++) for(int i=0;i<N;i++) A[j][i] = A[j][i]+B[j][i]; This pass is currently disabled by default. To give a brief introduction it consists of 3 stages- LoopInterchangeLegality : Checks the legality of loop interchange based on Dependency matrix. LoopInterchangeProfitability: A very basic heuristic has been added to check for profitibility. This will evolve over time. LoopInterchangeTransform : Which does the actual transform. LNT Performance tests shows improvement in Polybench/linear-algebra/kernels/mvt and Polybench/linear-algebra/kernels/gemver becnmarks. TODO: 1) Add support for reductions and lcssa phi. 2) Improve profitability model. 3) Improve loop selection algorithm to select best loop for interchange. Currently the innermost loop is selected for interchange. 4) Improve compile time regression found in llvm lnt due to this pass. 5) Fix issues in Dependency Analysis module. A special thanks to Hal for reviewing this code. Review: http://reviews.llvm.org/D7499 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231458 91177308-0d34-0410-b5e6-96231b3b80d8
185 lines
8.0 KiB
C++
185 lines
8.0 KiB
C++
//===- llvm/LinkAllPasses.h ------------ Reference All Passes ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This header file pulls in all transformation and analysis passes for tools
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// like opt and bugpoint that need this functionality.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LINKALLPASSES_H
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#define LLVM_LINKALLPASSES_H
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#include "llvm/Analysis/AliasSetTracker.h"
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#include "llvm/Analysis/CallPrinter.h"
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#include "llvm/Analysis/DomPrinter.h"
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#include "llvm/Analysis/IntervalPartition.h"
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#include "llvm/Analysis/Lint.h"
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#include "llvm/Analysis/Passes.h"
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#include "llvm/Analysis/PostDominators.h"
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#include "llvm/Analysis/RegionPass.h"
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#include "llvm/Analysis/RegionPrinter.h"
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#include "llvm/Analysis/ScalarEvolution.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/IRPrintingPasses.h"
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#include "llvm/Transforms/IPO.h"
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#include "llvm/Transforms/Instrumentation.h"
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#include "llvm/Transforms/ObjCARC.h"
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#include "llvm/Transforms/Scalar.h"
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#include "llvm/Transforms/Utils/SymbolRewriter.h"
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#include "llvm/Transforms/Utils/UnifyFunctionExitNodes.h"
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#include "llvm/Transforms/Vectorize.h"
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#include <cstdlib>
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namespace {
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struct ForcePassLinking {
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ForcePassLinking() {
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// We must reference the passes in such a way that compilers will not
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// delete it all as dead code, even with whole program optimization,
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// yet is effectively a NO-OP. As the compiler isn't smart enough
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// to know that getenv() never returns -1, this will do the job.
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if (std::getenv("bar") != (char*) -1)
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return;
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(void) llvm::createAAEvalPass();
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(void) llvm::createAggressiveDCEPass();
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(void) llvm::createBitTrackingDCEPass();
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(void) llvm::createAliasAnalysisCounterPass();
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(void) llvm::createAliasDebugger();
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(void) llvm::createArgumentPromotionPass();
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(void) llvm::createAlignmentFromAssumptionsPass();
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(void) llvm::createBasicAliasAnalysisPass();
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(void) llvm::createLibCallAliasAnalysisPass(nullptr);
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(void) llvm::createScalarEvolutionAliasAnalysisPass();
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(void) llvm::createTypeBasedAliasAnalysisPass();
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(void) llvm::createScopedNoAliasAAPass();
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(void) llvm::createBoundsCheckingPass();
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(void) llvm::createBreakCriticalEdgesPass();
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(void) llvm::createCallGraphPrinterPass();
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(void) llvm::createCallGraphViewerPass();
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(void) llvm::createCFGSimplificationPass();
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(void) llvm::createCFLAliasAnalysisPass();
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(void) llvm::createStructurizeCFGPass();
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(void) llvm::createConstantMergePass();
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(void) llvm::createConstantPropagationPass();
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(void) llvm::createCostModelAnalysisPass();
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(void) llvm::createDeadArgEliminationPass();
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(void) llvm::createDeadCodeEliminationPass();
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(void) llvm::createDeadInstEliminationPass();
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(void) llvm::createDeadStoreEliminationPass();
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(void) llvm::createDependenceAnalysisPass();
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(void) llvm::createDomOnlyPrinterPass();
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(void) llvm::createDomPrinterPass();
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(void) llvm::createDomOnlyViewerPass();
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(void) llvm::createDomViewerPass();
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(void) llvm::createGCOVProfilerPass();
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(void) llvm::createInstrProfilingPass();
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(void) llvm::createFunctionInliningPass();
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(void) llvm::createAlwaysInlinerPass();
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(void) llvm::createGlobalDCEPass();
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(void) llvm::createGlobalOptimizerPass();
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(void) llvm::createGlobalsModRefPass();
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(void) llvm::createIPConstantPropagationPass();
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(void) llvm::createIPSCCPPass();
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(void) llvm::createInductiveRangeCheckEliminationPass();
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(void) llvm::createIndVarSimplifyPass();
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(void) llvm::createInstructionCombiningPass();
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(void) llvm::createInternalizePass();
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(void) llvm::createLCSSAPass();
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(void) llvm::createLICMPass();
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(void) llvm::createLazyValueInfoPass();
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(void) llvm::createLoopExtractorPass();
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(void)llvm::createLoopInterchangePass();
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(void) llvm::createLoopSimplifyPass();
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(void) llvm::createLoopStrengthReducePass();
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(void) llvm::createLoopRerollPass();
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(void) llvm::createLoopUnrollPass();
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(void) llvm::createLoopUnswitchPass();
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(void) llvm::createLoopIdiomPass();
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(void) llvm::createLoopRotatePass();
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(void) llvm::createLowerExpectIntrinsicPass();
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(void) llvm::createLowerInvokePass();
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(void) llvm::createLowerSwitchPass();
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(void) llvm::createNoAAPass();
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(void) llvm::createObjCARCAliasAnalysisPass();
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(void) llvm::createObjCARCAPElimPass();
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(void) llvm::createObjCARCExpandPass();
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(void) llvm::createObjCARCContractPass();
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(void) llvm::createObjCARCOptPass();
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(void) llvm::createPAEvalPass();
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(void) llvm::createPromoteMemoryToRegisterPass();
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(void) llvm::createDemoteRegisterToMemoryPass();
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(void) llvm::createPruneEHPass();
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(void) llvm::createPostDomOnlyPrinterPass();
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(void) llvm::createPostDomPrinterPass();
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(void) llvm::createPostDomOnlyViewerPass();
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(void) llvm::createPostDomViewerPass();
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(void) llvm::createReassociatePass();
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(void) llvm::createRegionInfoPass();
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(void) llvm::createRegionOnlyPrinterPass();
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(void) llvm::createRegionOnlyViewerPass();
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(void) llvm::createRegionPrinterPass();
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(void) llvm::createRegionViewerPass();
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(void) llvm::createSCCPPass();
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(void) llvm::createScalarReplAggregatesPass();
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(void) llvm::createSingleLoopExtractorPass();
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(void) llvm::createStripSymbolsPass();
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(void) llvm::createStripNonDebugSymbolsPass();
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(void) llvm::createStripDeadDebugInfoPass();
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(void) llvm::createStripDeadPrototypesPass();
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(void) llvm::createTailCallEliminationPass();
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(void) llvm::createJumpThreadingPass();
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(void) llvm::createUnifyFunctionExitNodesPass();
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(void) llvm::createInstCountPass();
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(void) llvm::createConstantHoistingPass();
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(void) llvm::createCodeGenPreparePass();
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(void) llvm::createEarlyCSEPass();
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(void) llvm::createMergedLoadStoreMotionPass();
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(void) llvm::createGVNPass();
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(void) llvm::createMemCpyOptPass();
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(void) llvm::createLoopDeletionPass();
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(void) llvm::createPostDomTree();
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(void) llvm::createInstructionNamerPass();
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(void) llvm::createMetaRenamerPass();
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(void) llvm::createFunctionAttrsPass();
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(void) llvm::createMergeFunctionsPass();
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(void) llvm::createPrintModulePass(*(llvm::raw_ostream*)nullptr);
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(void) llvm::createPrintFunctionPass(*(llvm::raw_ostream*)nullptr);
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(void) llvm::createPrintBasicBlockPass(*(llvm::raw_ostream*)nullptr);
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(void) llvm::createModuleDebugInfoPrinterPass();
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(void) llvm::createPartialInliningPass();
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(void) llvm::createLintPass();
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(void) llvm::createSinkingPass();
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(void) llvm::createLowerAtomicPass();
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(void) llvm::createCorrelatedValuePropagationPass();
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(void) llvm::createMemDepPrinter();
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(void) llvm::createInstructionSimplifierPass();
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(void) llvm::createLoopVectorizePass();
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(void) llvm::createSLPVectorizerPass();
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(void) llvm::createBBVectorizePass();
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(void) llvm::createPartiallyInlineLibCallsPass();
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(void) llvm::createScalarizerPass();
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(void) llvm::createSeparateConstOffsetFromGEPPass();
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(void) llvm::createRewriteSymbolsPass();
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(void) llvm::createStraightLineStrengthReducePass();
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(void) llvm::createMemDerefPrinter();
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(void)new llvm::IntervalPartition();
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(void)new llvm::ScalarEvolution();
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((llvm::Function*)nullptr)->viewCFGOnly();
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llvm::RGPassManager RGM;
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((llvm::RegionPass*)nullptr)->runOnRegion((llvm::Region*)nullptr, RGM);
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llvm::AliasSetTracker X(*(llvm::AliasAnalysis*)nullptr);
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X.add(nullptr, 0, llvm::AAMDNodes()); // for -print-alias-sets
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}
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} ForcePassLinking; // Force link by creating a global definition.
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}
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#endif
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