//===- llvm/Pass.h - Base class for Passes ----------------------*- C++ -*-===//
-//
+//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
//===----------------------------------------------------------------------===//
//
// This file defines a base class that indicates that a specified class is a
// transformation pass implementation.
//
-// Pass's are designed this way so that it is possible to run passes in a cache
+// Passes are designed this way so that it is possible to run passes in a cache
// and organizationally optimal order without having to specify it at the front
// end. This allows arbitrary passes to be strung together and have them
-// executed as effeciently as possible.
+// executed as efficiently as possible.
//
// Passes should extend one of the classes below, depending on the guarantees
// that it can make about what will be modified as it is run. For example, most
#ifndef LLVM_PASS_H
#define LLVM_PASS_H
-#include <vector>
-#include <map>
-#include <iosfwd>
-#include <typeinfo>
-#include <cassert>
+#include "llvm/Support/Compiler.h"
+#include <string>
namespace llvm {
-class Value;
class BasicBlock;
class Function;
class Module;
class AnalysisUsage;
class PassInfo;
class ImmutablePass;
-template<class UnitType> class PassManagerT;
-struct AnalysisResolver;
+class PMStack;
+class AnalysisResolver;
+class PMDataManager;
+class raw_ostream;
+class StringRef;
// AnalysisID - Use the PassInfo to identify a pass...
-typedef const PassInfo* AnalysisID;
+typedef const void* AnalysisID;
+
+/// Different types of internal pass managers. External pass managers
+/// (PassManager and FunctionPassManager) are not represented here.
+/// Ordering of pass manager types is important here.
+enum PassManagerType {
+ PMT_Unknown = 0,
+ PMT_ModulePassManager = 1, ///< MPPassManager
+ PMT_CallGraphPassManager, ///< CGPassManager
+ PMT_FunctionPassManager, ///< FPPassManager
+ PMT_LoopPassManager, ///< LPPassManager
+ PMT_RegionPassManager, ///< RGPassManager
+ PMT_BasicBlockPassManager, ///< BBPassManager
+ PMT_Last
+};
+
+// Different types of passes.
+enum PassKind {
+ PT_BasicBlock,
+ PT_Region,
+ PT_Loop,
+ PT_Function,
+ PT_CallGraphSCC,
+ PT_Module,
+ PT_PassManager
+};
//===----------------------------------------------------------------------===//
/// Pass interface - Implemented by all 'passes'. Subclass this if you are an
/// constrained passes described below.
///
class Pass {
- friend class AnalysisResolver;
- AnalysisResolver *Resolver; // AnalysisResolver this pass is owned by...
- const PassInfo *PassInfoCache;
-
- // AnalysisImpls - This keeps track of which passes implement the interfaces
- // that are required by the current pass (to implement getAnalysis()).
- //
- std::vector<std::pair<const PassInfo*, Pass*> > AnalysisImpls;
+ AnalysisResolver *Resolver; // Used to resolve analysis
+ const void *PassID;
+ PassKind Kind;
+ void operator=(const Pass&) = delete;
+ Pass(const Pass &) = delete;
- void operator=(const Pass&); // DO NOT IMPLEMENT
- Pass(const Pass &); // DO NOT IMPLEMENT
public:
- Pass() : Resolver(0), PassInfoCache(0) {}
- virtual ~Pass() {} // Destructor is virtual so we can be subclassed
+ explicit Pass(PassKind K, char &pid)
+ : Resolver(nullptr), PassID(&pid), Kind(K) { }
+ virtual ~Pass();
+
+
+ PassKind getPassKind() const { return Kind; }
/// getPassName - Return a nice clean name for a pass. This usually
/// implemented in terms of the name that is registered by one of the
- /// Registration templates, but can be overloaded directly, and if nothing
- /// else is available, C++ RTTI will be consulted to get a SOMEWHAT
- /// intelligible name for the pass.
+ /// Registration templates, but can be overloaded directly.
///
virtual const char *getPassName() const;
- /// getPassInfo - Return the PassInfo data structure that corresponds to this
- /// pass... If the pass has not been registered, this will return null.
+ /// getPassID - Return the PassID number that corresponds to this pass.
+ AnalysisID getPassID() const {
+ return PassID;
+ }
+
+ /// doInitialization - Virtual method overridden by subclasses to do
+ /// any necessary initialization before any pass is run.
///
- const PassInfo *getPassInfo() const;
+ virtual bool doInitialization(Module &) { return false; }
- /// run - Run this pass, returning true if a modification was made to the
- /// module argument. This should be implemented by all concrete subclasses.
+ /// doFinalization - Virtual method overriden by subclasses to do any
+ /// necessary clean up after all passes have run.
///
- virtual bool run(Module &M) = 0;
+ virtual bool doFinalization(Module &) { return false; }
/// print - Print out the internal state of the pass. This is called by
/// Analyze to print out the contents of an analysis. Otherwise it is not
/// provide the Module* in case the analysis doesn't need it it can just be
/// ignored.
///
- virtual void print(std::ostream &O, const Module *M) const { print(O); }
- virtual void print(std::ostream &O) const;
- void dump() const; // dump - call print(std::cerr, 0);
+ virtual void print(raw_ostream &O, const Module *M) const;
+ void dump() const; // dump - Print to stderr.
+
+ /// createPrinterPass - Get a Pass appropriate to print the IR this
+ /// pass operates on (Module, Function or MachineFunction).
+ virtual Pass *createPrinterPass(raw_ostream &O,
+ const std::string &Banner) const = 0;
+
+ /// Each pass is responsible for assigning a pass manager to itself.
+ /// PMS is the stack of available pass manager.
+ virtual void assignPassManager(PMStack &,
+ PassManagerType) {}
+ /// Check if available pass managers are suitable for this pass or not.
+ virtual void preparePassManager(PMStack &);
+
+ /// Return what kind of Pass Manager can manage this pass.
+ virtual PassManagerType getPotentialPassManagerType() const;
+ // Access AnalysisResolver
+ void setResolver(AnalysisResolver *AR);
+ AnalysisResolver *getResolver() const { return Resolver; }
/// getAnalysisUsage - This function should be overriden by passes that need
/// analysis information to do their job. If a pass specifies that it uses a
/// particular analysis result to this function, it can then use the
/// getAnalysis<AnalysisType>() function, below.
///
- virtual void getAnalysisUsage(AnalysisUsage &Info) const {
- // By default, no analysis results are used, all are invalidated.
- }
+ virtual void getAnalysisUsage(AnalysisUsage &) const;
/// releaseMemory() - This member can be implemented by a pass if it wants to
/// be able to release its memory when it is no longer needed. The default
/// Optionally implement this function to release pass memory when it is no
/// longer used.
///
- virtual void releaseMemory() {}
+ virtual void releaseMemory();
+
+ /// getAdjustedAnalysisPointer - This method is used when a pass implements
+ /// an analysis interface through multiple inheritance. If needed, it should
+ /// override this to adjust the this pointer as needed for the specified pass
+ /// info.
+ virtual void *getAdjustedAnalysisPointer(AnalysisID ID);
+ virtual ImmutablePass *getAsImmutablePass();
+ virtual PMDataManager *getAsPMDataManager();
+
+ /// verifyAnalysis() - This member can be implemented by a analysis pass to
+ /// check state of analysis information.
+ virtual void verifyAnalysis() const;
// dumpPassStructure - Implement the -debug-passes=PassStructure option
virtual void dumpPassStructure(unsigned Offset = 0);
+ // lookupPassInfo - Return the pass info object for the specified pass class,
+ // or null if it is not known.
+ static const PassInfo *lookupPassInfo(const void *TI);
- // getPassInfo - Static method to get the pass information from a class name.
- template<typename AnalysisClass>
- static const PassInfo *getClassPassInfo() {
- return lookupPassInfo(typeid(AnalysisClass));
- }
+ // lookupPassInfo - Return the pass info object for the pass with the given
+ // argument string, or null if it is not known.
+ static const PassInfo *lookupPassInfo(StringRef Arg);
- // lookupPassInfo - Return the pass info object for the specified pass class,
+ // createPass - Create a object for the specified pass class,
// or null if it is not known.
- static const PassInfo *lookupPassInfo(const std::type_info &TI);
-
- /// getAnalysisToUpdate<AnalysisType>() - This function is used by subclasses
- /// to get to the analysis information that might be around that needs to be
- /// updated. This is different than getAnalysis in that it can fail (ie the
- /// analysis results haven't been computed), so should only be used if you
- /// provide the capability to update an analysis that exists. This method is
- /// often used by transformation APIs to update analysis results for a pass
- /// automatically as the transform is performed.
+ static Pass *createPass(AnalysisID ID);
+
+ /// getAnalysisIfAvailable<AnalysisType>() - Subclasses use this function to
+ /// get analysis information that might be around, for example to update it.
+ /// This is different than getAnalysis in that it can fail (if the analysis
+ /// results haven't been computed), so should only be used if you can handle
+ /// the case when the analysis is not available. This method is often used by
+ /// transformation APIs to update analysis results for a pass automatically as
+ /// the transform is performed.
///
- template<typename AnalysisType>
- AnalysisType *getAnalysisToUpdate() const; // Defined in PassAnalysisSupport.h
+ template<typename AnalysisType> AnalysisType *
+ getAnalysisIfAvailable() const; // Defined in PassAnalysisSupport.h
/// mustPreserveAnalysisID - This method serves the same function as
- /// getAnalysisToUpdate, but works if you just have an AnalysisID. This
+ /// getAnalysisIfAvailable, but works if you just have an AnalysisID. This
/// obviously cannot give you a properly typed instance of the class if you
- /// don't have the class name available (use getAnalysisToUpdate if you do),
- /// but it can tell you if you need to preserve the pass at least.
+ /// don't have the class name available (use getAnalysisIfAvailable if you
+ /// do), but it can tell you if you need to preserve the pass at least.
///
- bool mustPreserveAnalysisID(const PassInfo *AnalysisID) const;
+ bool mustPreserveAnalysisID(char &AID) const;
/// getAnalysis<AnalysisType>() - This function is used by subclasses to get
/// to the analysis information that they claim to use by overriding the
/// getAnalysisUsage function.
///
template<typename AnalysisType>
- AnalysisType &getAnalysis() const {
- assert(Resolver && "Pass has not been inserted into a PassManager object!");
- const PassInfo *PI = getClassPassInfo<AnalysisType>();
- return getAnalysisID<AnalysisType>(PI);
- }
+ AnalysisType &getAnalysis() const; // Defined in PassAnalysisSupport.h
template<typename AnalysisType>
- AnalysisType &getAnalysisID(const PassInfo *PI) const {
- assert(Resolver && "Pass has not been inserted into a PassManager object!");
- assert(PI && "getAnalysis for unregistered pass!");
-
- // PI *must* appear in AnalysisImpls. Because the number of passes used
- // should be a small number, we just do a linear search over a (dense)
- // vector.
- Pass *ResultPass = 0;
- for (unsigned i = 0; ; ++i) {
- assert(i != AnalysisImpls.size() &&
- "getAnalysis*() called on an analysis that we not "
- "'required' by pass!");
- if (AnalysisImpls[i].first == PI) {
- ResultPass = AnalysisImpls[i].second;
- break;
- }
- }
-
- // Because the AnalysisType may not be a subclass of pass (for
- // AnalysisGroups), we must use dynamic_cast here to potentially adjust the
- // return pointer (because the class may multiply inherit, once from pass,
- // once from AnalysisType).
- //
- AnalysisType *Result = dynamic_cast<AnalysisType*>(ResultPass);
- assert(Result && "Pass does not implement interface required!");
- return *Result;
- }
+ AnalysisType &getAnalysis(Function &F); // Defined in PassAnalysisSupport.h
-private:
- friend class PassManagerT<Module>;
- friend class PassManagerT<Function>;
- friend class PassManagerT<BasicBlock>;
- virtual void addToPassManager(PassManagerT<Module> *PM, AnalysisUsage &AU);
+ template<typename AnalysisType>
+ AnalysisType &getAnalysisID(AnalysisID PI) const;
+
+ template<typename AnalysisType>
+ AnalysisType &getAnalysisID(AnalysisID PI, Function &F);
};
-inline std::ostream &operator<<(std::ostream &OS, const Pass &P) {
- P.print(OS, 0); return OS;
-}
+//===----------------------------------------------------------------------===//
+/// ModulePass class - This class is used to implement unstructured
+/// interprocedural optimizations and analyses. ModulePasses may do anything
+/// they want to the program.
+///
+class ModulePass : public Pass {
+public:
+ /// createPrinterPass - Get a module printer pass.
+ Pass *createPrinterPass(raw_ostream &O,
+ const std::string &Banner) const override;
+
+ /// runOnModule - Virtual method overriden by subclasses to process the module
+ /// being operated on.
+ virtual bool runOnModule(Module &M) = 0;
+
+ void assignPassManager(PMStack &PMS, PassManagerType T) override;
+
+ /// Return what kind of Pass Manager can manage this pass.
+ PassManagerType getPotentialPassManagerType() const override;
+
+ explicit ModulePass(char &pid) : Pass(PT_Module, pid) {}
+ // Force out-of-line virtual method.
+ ~ModulePass() override;
+};
//===----------------------------------------------------------------------===//
/// not need to be run. This is useful for things like target information and
/// "basic" versions of AnalysisGroups.
///
-struct ImmutablePass : public Pass {
+class ImmutablePass : public ModulePass {
+public:
/// initializePass - This method may be overriden by immutable passes to allow
/// them to perform various initialization actions they require. This is
/// primarily because an ImmutablePass can "require" another ImmutablePass,
/// and if it does, the overloaded version of initializePass may get access to
/// these passes with getAnalysis<>.
///
- virtual void initializePass() {}
+ virtual void initializePass();
+
+ ImmutablePass *getAsImmutablePass() override { return this; }
/// ImmutablePasses are never run.
///
- virtual bool run(Module &M) { return false; }
+ bool runOnModule(Module &) override { return false; }
-private:
- friend class PassManagerT<Module>;
- virtual void addToPassManager(PassManagerT<Module> *PM, AnalysisUsage &AU);
-};
+ explicit ImmutablePass(char &pid)
+ : ModulePass(pid) {}
+ // Force out-of-line virtual method.
+ ~ImmutablePass() override;
+};
//===----------------------------------------------------------------------===//
/// FunctionPass class - This class is used to implement most global
/// 2. Optimizing a function does not cause the addition or removal of any
/// functions in the module
///
-struct FunctionPass : public Pass {
- /// doInitialization - Virtual method overridden by subclasses to do
- /// any necessary per-module initialization.
- ///
- virtual bool doInitialization(Module &M) { return false; }
+class FunctionPass : public Pass {
+public:
+ explicit FunctionPass(char &pid) : Pass(PT_Function, pid) {}
+
+ /// createPrinterPass - Get a function printer pass.
+ Pass *createPrinterPass(raw_ostream &O,
+ const std::string &Banner) const override;
/// runOnFunction - Virtual method overriden by subclasses to do the
/// per-function processing of the pass.
///
virtual bool runOnFunction(Function &F) = 0;
- /// doFinalization - Virtual method overriden by subclasses to do any post
- /// processing needed after all passes have run.
- ///
- virtual bool doFinalization(Module &M) { return false; }
+ void assignPassManager(PMStack &PMS, PassManagerType T) override;
- /// run - On a module, we run this pass by initializing, ronOnFunction'ing
- /// once for every function in the module, then by finalizing.
- ///
- virtual bool run(Module &M);
+ /// Return what kind of Pass Manager can manage this pass.
+ PassManagerType getPotentialPassManagerType() const override;
- /// run - On a function, we simply initialize, run the function, then
- /// finalize.
- ///
- bool run(Function &F);
-
-private:
- friend class PassManagerT<Module>;
- friend class PassManagerT<Function>;
- friend class PassManagerT<BasicBlock>;
- virtual void addToPassManager(PassManagerT<Module> *PM, AnalysisUsage &AU);
- virtual void addToPassManager(PassManagerT<Function> *PM, AnalysisUsage &AU);
+protected:
+ /// skipOptnoneFunction - This function has Attribute::OptimizeNone
+ /// and most transformation passes should skip it.
+ bool skipOptnoneFunction(const Function &F) const;
};
/// instruction at a time.
/// 2. Optimizations do not modify the CFG of the contained function, or any
/// other basic block in the function.
-/// 3. Optimizations conform to all of the constraints of FunctionPass's.
+/// 3. Optimizations conform to all of the constraints of FunctionPasses.
///
-struct BasicBlockPass : public FunctionPass {
- /// doInitialization - Virtual method overridden by subclasses to do
- /// any necessary per-module initialization.
- ///
- virtual bool doInitialization(Module &M) { return false; }
+class BasicBlockPass : public Pass {
+public:
+ explicit BasicBlockPass(char &pid) : Pass(PT_BasicBlock, pid) {}
+
+ /// createPrinterPass - Get a basic block printer pass.
+ Pass *createPrinterPass(raw_ostream &O,
+ const std::string &Banner) const override;
+
+ using llvm::Pass::doInitialization;
+ using llvm::Pass::doFinalization;
/// doInitialization - Virtual method overridden by BasicBlockPass subclasses
/// to do any necessary per-function initialization.
///
- virtual bool doInitialization(Function &F) { return false; }
+ virtual bool doInitialization(Function &);
/// runOnBasicBlock - Virtual method overriden by subclasses to do the
/// per-basicblock processing of the pass.
/// doFinalization - Virtual method overriden by BasicBlockPass subclasses to
/// do any post processing needed after all passes have run.
///
- virtual bool doFinalization(Function &F) { return false; }
-
- /// doFinalization - Virtual method overriden by subclasses to do any post
- /// processing needed after all passes have run.
- ///
- virtual bool doFinalization(Module &M) { return false; }
+ virtual bool doFinalization(Function &);
+ void assignPassManager(PMStack &PMS, PassManagerType T) override;
- // To run this pass on a function, we simply call runOnBasicBlock once for
- // each function.
- //
- bool runOnFunction(Function &F);
+ /// Return what kind of Pass Manager can manage this pass.
+ PassManagerType getPotentialPassManagerType() const override;
- /// To run directly on the basic block, we initialize, runOnBasicBlock, then
- /// finalize.
- ///
- bool run(BasicBlock &BB);
-
-private:
- friend class PassManagerT<Function>;
- friend class PassManagerT<BasicBlock>;
- virtual void addToPassManager(PassManagerT<Function> *PM, AnalysisUsage &AU);
- virtual void addToPassManager(PassManagerT<BasicBlock> *PM,AnalysisUsage &AU);
+protected:
+ /// skipOptnoneFunction - Containing function has Attribute::OptimizeNone
+ /// and most transformation passes should skip it.
+ bool skipOptnoneFunction(const BasicBlock &BB) const;
};
+/// If the user specifies the -time-passes argument on an LLVM tool command line
+/// then the value of this boolean will be true, otherwise false.
+/// @brief This is the storage for the -time-passes option.
+extern bool TimePassesIsEnabled;
+
} // End llvm namespace
// Include support files that contain important APIs commonly used by Passes,
projects / oota-llvm.git / blobdiff