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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31709 91177308-0d34-0410-b5e6-96231b3b80d8
578 lines
18 KiB
C++
578 lines
18 KiB
C++
//===- PassManager.cpp - LLVM Pass Infrastructure Implementation ----------===//
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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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// This file implements the LLVM Pass Manager infrastructure.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/PassManager.h"
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#include "llvm/Module.h"
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#include <vector>
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#include <set>
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using namespace llvm;
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namespace llvm {
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/// CommonPassManagerImpl helps pass manager analysis required by
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/// the managed passes. It provides methods to add/remove analysis
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/// available and query if certain analysis is available or not.
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class CommonPassManagerImpl : public Pass {
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public:
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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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/// Return true IFF AnalysisID AID is currently available.
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bool isAnalysisAvailable(AnalysisID AID) {
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return (AvailableAnalysis.count(AID) != 0);
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}
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/// Augment RequiredAnalysis by adding analysis required by pass P.
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void noteDownRequiredAnalysis(Pass *P);
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/// Augment AvailableAnalysis by adding analysis made available by pass P.
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void noteDownAvailableAnalysis(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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void removeDeadPasses() { /* TODO : Implement */ }
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/// Add pass P into the PassVector. Update RequiredAnalysis and
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/// AvailableAnalysis appropriately if ProcessAnalysis is true.
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void addPassToManager (Pass *P, bool ProcessAnalysis = true);
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inline std::vector<Pass *>::iterator passVectorBegin() {
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return PassVector.begin();
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}
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inline std::vector<Pass *>::iterator passVectorEnd() {
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return PassVector.end();
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}
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private:
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// Analysis required by the passes managed by this manager
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std::vector<AnalysisID> RequiredAnalysis;
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// set of available Analysis
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std::set<AnalysisID> AvailableAnalysis;
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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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};
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/// BasicBlockPassManager_New manages BasicBlockPass. It batches all the
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/// pass together and sequence them to process one basic block before
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/// processing next basic block.
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class BasicBlockPassManager_New : public CommonPassManagerImpl {
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public:
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BasicBlockPassManager_New() { }
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/// Add a pass into a passmanager queue.
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bool addPass(Pass *p);
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/// Execute all of the passes scheduled for execution. Keep track of
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/// whether any of the passes modifies the function, and if so, return true.
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bool runOnFunction(Function &F);
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/// Return true IFF AnalysisID AID is currently available.
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bool analysisCurrentlyAvailable(AnalysisID AID);
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private:
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};
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/// FunctionPassManagerImpl_New manages FunctionPasses and BasicBlockPassManagers.
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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 FunctionPassManagerImpl_New : public CommonPassManagerImpl {
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public:
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FunctionPassManagerImpl_New(ModuleProvider *P) { /* TODO */ }
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FunctionPassManagerImpl_New() {
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activeBBPassManager = NULL;
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}
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~FunctionPassManagerImpl_New() { /* TODO */ };
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/// add - Add a pass to the queue of passes to run. This passes
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/// ownership of the Pass to the PassManager. When the
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/// PassManager_X is destroyed, the pass will be destroyed as well, so
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/// there is no need to delete the pass. (TODO delete passes.)
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/// This implies that all passes MUST be allocated with 'new'.
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void add(Pass *P) { /* TODO*/ }
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/// Add pass into the pass manager queue.
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bool addPass(Pass *P);
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/// Execute all of the passes scheduled for execution. Keep
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/// track of whether any of the passes modifies the function, and if
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/// so, return true.
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bool runOnModule(Module &M);
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/// Return true IFF AnalysisID AID is currently available.
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bool analysisCurrentlyAvailable(AnalysisID AID);
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private:
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// Active Pass Managers
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BasicBlockPassManager_New *activeBBPassManager;
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};
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/// ModulePassManager_New manages ModulePasses and function pass managers.
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/// It batches all Module passes passes and function pass managers together and
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/// sequence them to process one module.
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class ModulePassManager_New : public CommonPassManagerImpl {
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public:
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ModulePassManager_New() { activeFunctionPassManager = NULL; }
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/// Add a pass into a passmanager queue.
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bool addPass(Pass *p);
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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 runOnModule(Module &M);
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/// Return true IFF AnalysisID AID is currently available.
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bool analysisCurrentlyAvailable(AnalysisID AID);
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private:
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// Active Pass Manager
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FunctionPassManagerImpl_New *activeFunctionPassManager;
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};
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/// PassManager_New manages ModulePassManagers
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class PassManagerImpl_New : public CommonPassManagerImpl {
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public:
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/// add - Add a pass to the queue of passes to run. This passes ownership of
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/// the Pass to the PassManager. When the PassManager is destroyed, the pass
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/// will be destroyed as well, so there is no need to delete the pass. This
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/// implies that all passes MUST be allocated with 'new'.
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void add(Pass *P);
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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 run(Module &M);
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/// Return true IFF AnalysisID AID is currently available.
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bool analysisCurrentlyAvailable(AnalysisID AID);
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private:
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/// Add a pass into a passmanager queue. This is used by schedulePasses
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bool addPass(Pass *p);
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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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/// Schedule all passes collected in pass queue using add(). Add all the
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/// schedule passes into various manager's queue using addPass().
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void schedulePasses();
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// Collection of pass managers
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std::vector<ModulePassManager_New *> PassManagers;
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// Active Pass Manager
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ModulePassManager_New *activeManager;
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};
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} // End of llvm namespace
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// CommonPassManagerImpl implementation
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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 CommonPassManagerImpl::manageablePass(Pass *P) {
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AnalysisUsage AnUsage;
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P->getAnalysisUsage(AnUsage);
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// If this pass is not preserving information that is required by the other
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// passes managed by this manager then use new manager
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if (!AnUsage.getPreservesAll()) {
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const std::vector<AnalysisID> &PreservedSet = AnUsage.getPreservedSet();
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for (std::vector<AnalysisID>::iterator I = RequiredAnalysis.begin(),
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E = RequiredAnalysis.end(); I != E; ++I) {
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if (std::find(PreservedSet.begin(), PreservedSet.end(), *I) ==
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PreservedSet.end())
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// This analysis is not preserved. Need new manager.
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return false;
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}
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}
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return true;
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}
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/// Augment RequiredAnalysis by adding analysis required by pass P.
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void CommonPassManagerImpl::noteDownRequiredAnalysis(Pass *P) {
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AnalysisUsage AnUsage;
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P->getAnalysisUsage(AnUsage);
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const std::vector<AnalysisID> &RequiredSet = AnUsage.getRequiredSet();
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// FIXME: What about duplicates ?
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RequiredAnalysis.insert(RequiredAnalysis.end(), RequiredSet.begin(),
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RequiredSet.end());
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}
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/// Augement AvailableAnalysis by adding analysis made available by pass P.
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void CommonPassManagerImpl::noteDownAvailableAnalysis(Pass *P) {
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if (const PassInfo *PI = P->getPassInfo()) {
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AvailableAnalysis.insert(PI);
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//TODO This pass is the current implementation of all of the interfaces it
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//TODO implements as well.
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//TODO
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//TODO const std::vector<const PassInfo*> &II = PI->getInterfacesImplemented();
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//TODO for (unsigned i = 0, e = II.size(); i != e; ++i)
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//TODO CurrentAnalyses[II[i]] = P;
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}
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}
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/// Remove Analyss not preserved by Pass P
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void CommonPassManagerImpl::removeNotPreservedAnalysis(Pass *P) {
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AnalysisUsage AnUsage;
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P->getAnalysisUsage(AnUsage);
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const std::vector<AnalysisID> &PreservedSet = AnUsage.getPreservedSet();
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for (std::set<AnalysisID>::iterator I = AvailableAnalysis.begin(),
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E = AvailableAnalysis.end(); I != E; ++I ) {
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if (std::find(PreservedSet.begin(), PreservedSet.end(), *I) ==
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PreservedSet.end()) {
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// Remove this analysis
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std::set<AnalysisID>::iterator J = I++;
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AvailableAnalysis.erase(J);
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}
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}
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}
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/// Add pass P into the PassVector. Update RequiredAnalysis and
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/// AvailableAnalysis appropriately if ProcessAnalysis is true.
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void CommonPassManagerImpl::addPassToManager (Pass *P,
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bool ProcessAnalysis) {
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if (ProcessAnalysis) {
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// Take a note of analysis required and made available by this pass
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noteDownRequiredAnalysis(P);
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noteDownAvailableAnalysis(P);
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// Remove the analysis not preserved by this pass
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removeNotPreservedAnalysis(P);
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}
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// Add pass
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PassVector.push_back(P);
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}
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/// BasicBlockPassManager implementation
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/// Add pass P into PassVector and return true. If this pass is not
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/// manageable by this manager then return false.
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bool
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BasicBlockPassManager_New::addPass(Pass *P) {
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BasicBlockPass *BP = dynamic_cast<BasicBlockPass*>(P);
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if (!BP)
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return false;
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// If this pass does not preserve anlysis that is used by other passes
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// managed by this manager than it is not a suiable pass for this manager.
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if (!manageablePass(P))
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return false;
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addPassToManager (BP);
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return true;
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}
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/// Execute all of the passes scheduled for execution by invoking
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/// runOnBasicBlock method. Keep track of whether any of the passes modifies
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/// the function, and if so, return true.
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bool
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BasicBlockPassManager_New::runOnFunction(Function &F) {
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bool Changed = false;
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for (Function::iterator I = F.begin(), E = F.end(); I != E; ++I)
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for (std::vector<Pass *>::iterator itr = passVectorBegin(),
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e = passVectorEnd(); itr != e; ++itr) {
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Pass *P = *itr;
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BasicBlockPass *BP = dynamic_cast<BasicBlockPass*>(P);
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Changed |= BP->runOnBasicBlock(*I);
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}
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return Changed;
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}
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/// Return true IFF AnalysisID AID is currently available.
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bool BasicBlockPassManager_New::analysisCurrentlyAvailable(AnalysisID AID) {
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return isAnalysisAvailable(AID);
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}
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// FunctionPassManager_New implementation
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/// Create new Function pass manager
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FunctionPassManager_New::FunctionPassManager_New() {
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FPM = new FunctionPassManagerImpl_New();
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}
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/// add - Add a pass to the queue of passes to run. This passes
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/// ownership of the Pass to the PassManager. When the
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/// PassManager_X is destroyed, the pass will be destroyed as well, so
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/// there is no need to delete the pass. (TODO delete passes.)
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/// This implies that all passes MUST be allocated with 'new'.
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void
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FunctionPassManager_New::add(Pass *P) {
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FPM->add(P);
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}
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/// Execute all of the passes scheduled for execution. Keep
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/// track of whether any of the passes modifies the function, and if
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/// so, return true.
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bool
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FunctionPassManager_New::runOnModule(Module &M) {
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return FPM->runOnModule(M);
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}
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// FunctionPassManagerImpl_New implementation
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// FunctionPassManager
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/// Add pass P into the pass manager queue. If P is a BasicBlockPass then
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/// either use it into active basic block pass manager or create new basic
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/// block pass manager to handle pass P.
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bool
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FunctionPassManagerImpl_New::addPass(Pass *P) {
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// If P is a BasicBlockPass then use BasicBlockPassManager_New.
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if (BasicBlockPass *BP = dynamic_cast<BasicBlockPass*>(P)) {
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if (!activeBBPassManager
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|| !activeBBPassManager->addPass(BP)) {
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activeBBPassManager = new BasicBlockPassManager_New();
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addPassToManager(activeBBPassManager, false);
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if (!activeBBPassManager->addPass(BP))
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assert(0 && "Unable to add Pass");
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}
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return true;
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}
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FunctionPass *FP = dynamic_cast<FunctionPass *>(P);
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if (!FP)
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return false;
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// If this pass does not preserve anlysis that is used by other passes
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// managed by this manager than it is not a suiable pass for this manager.
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if (!manageablePass(P))
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return false;
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addPassToManager (FP);
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activeBBPassManager = NULL;
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return true;
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}
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/// Execute all of the passes scheduled for execution by invoking
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/// runOnFunction method. Keep track of whether any of the passes modifies
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/// the function, and if so, return true.
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bool
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FunctionPassManagerImpl_New::runOnModule(Module &M) {
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bool Changed = false;
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for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
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for (std::vector<Pass *>::iterator itr = passVectorBegin(),
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e = passVectorEnd(); itr != e; ++itr) {
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Pass *P = *itr;
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FunctionPass *FP = dynamic_cast<FunctionPass*>(P);
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Changed |= FP->runOnFunction(*I);
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}
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return Changed;
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}
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/// Return true IFF AnalysisID AID is currently available.
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bool FunctionPassManagerImpl_New::analysisCurrentlyAvailable(AnalysisID AID) {
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if (isAnalysisAvailable(AID))
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return true;
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if (activeBBPassManager &&
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activeBBPassManager->isAnalysisAvailable(AID))
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return true;
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// TODO : Check inactive managers
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return false;
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}
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// ModulePassManager implementation
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/// Add P into pass vector if it is manageble. If P is a FunctionPass
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/// then use FunctionPassManagerImpl_New to manage it. Return false if P
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/// is not manageable by this manager.
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bool
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ModulePassManager_New::addPass(Pass *P) {
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// If P is FunctionPass then use function pass maanager.
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if (FunctionPass *FP = dynamic_cast<FunctionPass*>(P)) {
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activeFunctionPassManager = NULL;
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if (!activeFunctionPassManager
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|| !activeFunctionPassManager->addPass(P)) {
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activeFunctionPassManager = new FunctionPassManagerImpl_New();
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addPassToManager(activeFunctionPassManager, false);
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if (!activeFunctionPassManager->addPass(FP))
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assert(0 && "Unable to add pass");
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}
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return true;
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}
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ModulePass *MP = dynamic_cast<ModulePass *>(P);
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if (!MP)
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return false;
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// If this pass does not preserve anlysis that is used by other passes
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// managed by this manager than it is not a suiable pass for this manager.
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if (!manageablePass(P))
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return false;
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addPassToManager(MP);
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activeFunctionPassManager = NULL;
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return true;
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}
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/// Execute all of the passes scheduled for execution by invoking
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/// runOnModule method. Keep track of whether any of the passes modifies
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/// the module, and if so, return true.
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bool
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ModulePassManager_New::runOnModule(Module &M) {
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bool Changed = false;
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for (std::vector<Pass *>::iterator itr = passVectorBegin(),
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e = passVectorEnd(); itr != e; ++itr) {
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Pass *P = *itr;
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ModulePass *MP = dynamic_cast<ModulePass*>(P);
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Changed |= MP->runOnModule(M);
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}
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return Changed;
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}
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/// Return true IFF AnalysisID AID is currently available.
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bool ModulePassManager_New::analysisCurrentlyAvailable(AnalysisID AID) {
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if (isAnalysisAvailable(AID))
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return true;
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if (activeFunctionPassManager &&
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activeFunctionPassManager->isAnalysisAvailable(AID))
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return true;
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// TODO : Check inactive managers
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return false;
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}
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/// Return true IFF AnalysisID AID is currently available.
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bool PassManagerImpl_New::analysisCurrentlyAvailable(AnalysisID AID) {
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// TODO : Check inactive managers
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return activeManager->analysisCurrentlyAvailable(AID);
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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 PassManagerImpl_New::schedulePass(Pass *P) {
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AnalysisUsage AnUsage;
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P->getAnalysisUsage(AnUsage);
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const std::vector<AnalysisID> &RequiredSet = AnUsage.getRequiredSet();
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for (std::vector<AnalysisID>::const_iterator I = RequiredSet.begin(),
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E = RequiredSet.end(); I != E; ++I) {
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if (!analysisCurrentlyAvailable(*I)) {
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// Schedule this analysis run first.
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Pass *AP = (*I)->createPass();
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schedulePass(AP);
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}
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}
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addPass(P);
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// TODO : Walk through all managers and remove not preserved analysis
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// TODO : remove dead passes
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}
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/// Schedule all passes from the queue by adding them in their
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/// respective manager's queue.
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void PassManagerImpl_New::schedulePasses() {
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for (std::vector<Pass *>::iterator I = passVectorBegin(),
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E = passVectorEnd(); I != E; ++I)
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schedulePass (*I);
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}
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/// Add pass P to the queue of passes to run.
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void PassManagerImpl_New::add(Pass *P) {
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// Do not process Analysis now. Analysis is process while scheduling
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// the pass vector.
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addPassToManager(P, false);
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}
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// PassManager_New implementation
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/// Add P into active pass manager or use new module pass manager to
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/// manage it.
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bool PassManagerImpl_New::addPass(Pass *P) {
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if (!activeManager || !activeManager->addPass(P)) {
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activeManager = new ModulePassManager_New();
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PassManagers.push_back(activeManager);
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}
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return activeManager->addPass(P);
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}
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/// run - Execute all of the passes scheduled for execution. Keep track of
|
|
/// whether any of the passes modifies the module, and if so, return true.
|
|
bool PassManagerImpl_New::run(Module &M) {
|
|
|
|
schedulePasses();
|
|
bool Changed = false;
|
|
for (std::vector<ModulePassManager_New *>::iterator itr = PassManagers.begin(),
|
|
e = PassManagers.end(); itr != e; ++itr) {
|
|
ModulePassManager_New *pm = *itr;
|
|
Changed |= pm->runOnModule(M);
|
|
}
|
|
return Changed;
|
|
}
|
|
|
|
/// Create new pass manager
|
|
PassManager_New::PassManager_New() {
|
|
PM = new PassManagerImpl_New();
|
|
}
|
|
|
|
/// add - Add a pass to the queue of passes to run. This passes ownership of
|
|
/// the Pass to the PassManager. When the PassManager is destroyed, the pass
|
|
/// will be destroyed as well, so there is no need to delete the pass. This
|
|
/// implies that all passes MUST be allocated with 'new'.
|
|
void
|
|
PassManager_New::add(Pass *P) {
|
|
PM->add(P);
|
|
}
|
|
|
|
/// run - Execute all of the passes scheduled for execution. Keep track of
|
|
/// whether any of the passes modifies the module, and if so, return true.
|
|
bool
|
|
PassManager_New::run(Module &M) {
|
|
return PM->run(M);
|
|
}
|
|
|