2007-01-15 23:06:56 +00:00
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//===- llvm/PassManager.h - Pass Inftrastructre classes --------*- C++ -*-===//
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2007-01-12 18:52:44 +00:00
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Devang Patel and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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2007-01-15 23:06:56 +00:00
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// This file declares the LLVM Pass Manager infrastructure.
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2007-01-12 18:52:44 +00:00
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/PassManager.h"
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using namespace llvm;
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class llvm::PMDataManager;
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class llvm::PMStack;
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//===----------------------------------------------------------------------===//
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// Overview:
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// The Pass Manager Infrastructure manages passes. It's responsibilities are:
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//
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// o Manage optimization pass execution order
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// o Make required Analysis information available before pass P is run
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// o Release memory occupied by dead passes
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// o If Analysis information is dirtied by a pass then regenerate Analysis
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// information before it is consumed by another pass.
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//
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// Pass Manager Infrastructure uses multiple pass managers. They are
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// PassManager, FunctionPassManager, MPPassManager, FPPassManager, BBPassManager.
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// This class hierarcy uses multiple inheritance but pass managers do not derive
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// from another pass manager.
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//
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// PassManager and FunctionPassManager are two top-level pass manager that
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// represents the external interface of this entire pass manager infrastucture.
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//
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// Important classes :
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//
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// [o] class PMTopLevelManager;
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//
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// Two top level managers, PassManager and FunctionPassManager, derive from
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// PMTopLevelManager. PMTopLevelManager manages information used by top level
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// managers such as last user info.
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//
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// [o] class PMDataManager;
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//
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// PMDataManager manages information, e.g. list of available analysis info,
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// used by a pass manager to manage execution order of passes. It also provides
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// a place to implement common pass manager APIs. All pass managers derive from
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// PMDataManager.
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//
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// [o] class BBPassManager : public FunctionPass, public PMDataManager;
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//
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// BBPassManager manages BasicBlockPasses.
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//
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// [o] class FunctionPassManager;
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//
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// This is a external interface used by JIT to manage FunctionPasses. This
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// interface relies on FunctionPassManagerImpl to do all the tasks.
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//
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// [o] class FunctionPassManagerImpl : public ModulePass, PMDataManager,
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// public PMTopLevelManager;
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//
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// FunctionPassManagerImpl is a top level manager. It manages FPPassManagers
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//
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// [o] class FPPassManager : public ModulePass, public PMDataManager;
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//
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// FPPassManager manages FunctionPasses and BBPassManagers
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//
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// [o] class MPPassManager : public Pass, public PMDataManager;
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//
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// MPPassManager manages ModulePasses and FPPassManagers
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//
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// [o] class PassManager;
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//
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// This is a external interface used by various tools to manages passes. It
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// relies on PassManagerImpl to do all the tasks.
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//
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// [o] class PassManagerImpl : public Pass, public PMDataManager,
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// public PMDTopLevelManager
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//
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// PassManagerImpl is a top level pass manager responsible for managing
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// MPPassManagers.
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//===----------------------------------------------------------------------===//
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namespace llvm {
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2007-01-16 02:00:38 +00:00
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/// FunctionPassManager and PassManager, two top level managers, serve
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/// as the public interface of pass manager infrastructure.
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enum TopLevelManagerType {
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TLM_Function, // FunctionPassManager
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TLM_Pass // PassManager
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};
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2007-03-05 20:01:30 +00:00
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// enums for debugging strings
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enum PassDebuggingString {
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EXECUTION_MSG, // "Executing Pass '"
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MODIFICATION_MSG, // "' Made Modification '"
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FREEING_MSG, // " Freeing Pass '"
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ON_BASICBLOCK_MSG, // "' on BasicBlock '" + PassName + "'...\n"
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ON_FUNCTION_MSG, // "' on Function '" + FunctionName + "'...\n"
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ON_MODULE_MSG, // "' on Module '" + ModuleName + "'...\n"
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ON_LOOP_MSG, // " 'on Loop ...\n'"
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ON_CG_MSG // "' on Call Graph ...\n'"
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};
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2007-01-12 18:52:44 +00:00
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//===----------------------------------------------------------------------===//
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// PMTopLevelManager
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//
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/// PMTopLevelManager manages LastUser info and collects common APIs used by
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/// top level pass managers.
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class PMTopLevelManager {
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public:
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virtual unsigned getNumContainedManagers() {
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return PassManagers.size();
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}
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/// Schedule pass P for execution. Make sure that passes required by
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/// P are run before P is run. Update analysis info maintained by
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/// the manager. Remove dead passes. This is a recursive function.
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void schedulePass(Pass *P);
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/// This is implemented by top level pass manager and used by
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/// schedulePass() to add analysis info passes that are not available.
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virtual void addTopLevelPass(Pass *P) = 0;
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/// Set pass P as the last user of the given analysis passes.
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void setLastUser(std::vector<Pass *> &AnalysisPasses, Pass *P);
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/// Collect passes whose last user is P
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void collectLastUses(std::vector<Pass *> &LastUses, Pass *P);
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/// Find the pass that implements Analysis AID. Search immutable
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/// passes and all pass managers. If desired pass is not found
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/// then return NULL.
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Pass *findAnalysisPass(AnalysisID AID);
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2007-01-16 02:00:38 +00:00
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PMTopLevelManager(enum TopLevelManagerType t);
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2007-01-12 18:52:44 +00:00
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virtual ~PMTopLevelManager();
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/// Add immutable pass and initialize it.
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inline void addImmutablePass(ImmutablePass *P) {
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P->initializePass();
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ImmutablePasses.push_back(P);
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}
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inline std::vector<ImmutablePass *>& getImmutablePasses() {
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return ImmutablePasses;
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}
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void addPassManager(Pass *Manager) {
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PassManagers.push_back(Manager);
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}
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// Add Manager into the list of managers that are not directly
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// maintained by this top level pass manager
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inline void addIndirectPassManager(PMDataManager *Manager) {
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IndirectPassManagers.push_back(Manager);
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}
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// Print passes managed by this top level manager.
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void dumpPasses() const;
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void dumpArguments() const;
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void initializeAllAnalysisInfo();
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// Active Pass Managers
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PMStack activeStack;
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protected:
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/// Collection of pass managers
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std::vector<Pass *> PassManagers;
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private:
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/// Collection of pass managers that are not directly maintained
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/// by this pass manager
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std::vector<PMDataManager *> IndirectPassManagers;
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// Map to keep track of last user of the analysis pass.
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// LastUser->second is the last user of Lastuser->first.
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std::map<Pass *, Pass *> LastUser;
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/// Immutable passes are managed by top level manager.
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std::vector<ImmutablePass *> ImmutablePasses;
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};
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//===----------------------------------------------------------------------===//
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// PMDataManager
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/// PMDataManager provides the common place to manage the analysis data
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/// used by pass managers.
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class PMDataManager {
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public:
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2007-03-06 01:55:46 +00:00
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2007-01-12 18:52:44 +00:00
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PMDataManager(int Depth) : TPM(NULL), Depth(Depth) {
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initializeAnalysisInfo();
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}
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virtual ~PMDataManager();
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/// Return true IFF pass P's required analysis set does not required new
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/// manager.
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bool manageablePass(Pass *P);
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/// Augment AvailableAnalysis by adding analysis made available by pass P.
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void recordAvailableAnalysis(Pass *P);
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/// Remove Analysis that is not preserved by the pass
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void removeNotPreservedAnalysis(Pass *P);
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/// Remove dead passes
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2007-03-05 20:01:30 +00:00
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void removeDeadPasses(Pass *P, std::string Msg, enum PassDebuggingString);
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2007-01-12 18:52:44 +00:00
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/// Add pass P into the PassVector. Update
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/// AvailableAnalysis appropriately if ProcessAnalysis is true.
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2007-01-12 20:07:16 +00:00
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void add(Pass *P, bool ProcessAnalysis = true);
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2007-01-12 18:52:44 +00:00
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/// Initialize available analysis information.
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void initializeAnalysisInfo() {
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AvailableAnalysis.clear();
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2007-03-06 01:55:46 +00:00
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for (unsigned i = 0; i < PMT_Last; ++i)
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InheritedAnalysis[i] = NULL;
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2007-01-12 18:52:44 +00:00
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}
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/// Populate RequiredPasses with the analysis pass that are required by
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/// pass P.
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void collectRequiredAnalysisPasses(std::vector<Pass *> &RequiredPasses,
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Pass *P);
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/// All Required analyses should be available to the pass as it runs! Here
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/// we fill in the AnalysisImpls member of the pass so that it can
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/// successfully use the getAnalysis() method to retrieve the
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/// implementations it needs.
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void initializeAnalysisImpl(Pass *P);
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/// Find the pass that implements Analysis AID. If desired pass is not found
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/// then return NULL.
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Pass *findAnalysisPass(AnalysisID AID, bool Direction);
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// Access toplevel manager
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PMTopLevelManager *getTopLevelManager() { return TPM; }
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void setTopLevelManager(PMTopLevelManager *T) { TPM = T; }
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unsigned getDepth() const { return Depth; }
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// Print routines used by debug-pass
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void dumpLastUses(Pass *P, unsigned Offset) const;
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void dumpPassArguments() const;
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2007-03-05 20:01:30 +00:00
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void dumpPassInfo(Pass *P, enum PassDebuggingString S1,
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enum PassDebuggingString S2, std::string Msg);
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2007-01-12 18:52:44 +00:00
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void dumpAnalysisSetInfo(const char *Msg, Pass *P,
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const std::vector<AnalysisID> &Set) const;
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virtual unsigned getNumContainedPasses() {
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return PassVector.size();
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}
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2007-02-27 15:00:39 +00:00
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virtual PassManagerType getPassManagerType() const {
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2007-01-12 18:52:44 +00:00
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assert ( 0 && "Invalid use of getPassManagerType");
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return PMT_Unknown;
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}
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2007-03-06 01:55:46 +00:00
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std::map<AnalysisID, Pass*> *getAvailableAnalysis() {
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return &AvailableAnalysis;
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}
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// Collect AvailableAnalysis from all the active Pass Managers.
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void populateInheritedAnalysis(PMStack &PMS) {
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unsigned Index = 0;
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for (PMStack::iterator I = PMS.begin(), E = PMS.end();
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I != E; ++I)
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InheritedAnalysis[Index++] = (*I)->getAvailableAnalysis();
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}
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2007-01-12 18:52:44 +00:00
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protected:
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// Top level manager.
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PMTopLevelManager *TPM;
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// Collection of pass that are managed by this manager
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std::vector<Pass *> PassVector;
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2007-03-06 01:55:46 +00:00
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// Collection of Analysis provided by Parent pass manager and
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// used by current pass manager. At at time there can not be more
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// then PMT_Last active pass mangers.
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std::map<AnalysisID, Pass *> *InheritedAnalysis[PMT_Last];
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2007-01-12 18:52:44 +00:00
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private:
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// Set of available Analysis. This information is used while scheduling
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// pass. If a pass requires an analysis which is not not available then
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// equired analysis pass is scheduled to run before the pass itself is
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// scheduled to run.
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std::map<AnalysisID, Pass*> AvailableAnalysis;
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unsigned Depth;
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};
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//===----------------------------------------------------------------------===//
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// FPPassManager
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//
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/// FPPassManager manages BBPassManagers and FunctionPasses.
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/// It batches all function passes and basic block pass managers together and
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/// sequence them to process one function at a time before processing next
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/// function.
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class FPPassManager : public ModulePass, public PMDataManager {
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public:
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FPPassManager(int Depth) : PMDataManager(Depth) { }
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/// run - Execute all of the passes scheduled for execution. Keep track of
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/// whether any of the passes modifies the module, and if so, return true.
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bool runOnFunction(Function &F);
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bool runOnModule(Module &M);
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/// doInitialization - Run all of the initializers for the function passes.
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///
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bool doInitialization(Module &M);
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/// doFinalization - Run all of the initializers for the function passes.
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///
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bool doFinalization(Module &M);
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/// Pass Manager itself does not invalidate any analysis info.
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void getAnalysisUsage(AnalysisUsage &Info) const {
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Info.setPreservesAll();
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}
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// Print passes managed by this manager
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void dumpPassStructure(unsigned Offset);
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2007-02-01 22:10:12 +00:00
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virtual const char *getPassName() const {
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return "Function Pass Manager";
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}
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2007-01-12 18:52:44 +00:00
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FunctionPass *getContainedPass(unsigned N) {
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assert ( N < PassVector.size() && "Pass number out of range!");
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FunctionPass *FP = static_cast<FunctionPass *>(PassVector[N]);
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return FP;
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}
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2007-02-27 15:00:39 +00:00
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virtual PassManagerType getPassManagerType() const {
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2007-01-12 18:52:44 +00:00
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return PMT_FunctionPassManager;
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}
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};
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}
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2007-01-29 23:10:37 +00:00
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extern void StartPassTimer(Pass *);
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extern void StopPassTimer(Pass *);
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