// 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 "llvm/System/DataTypes.h"
-#include <cassert>
-#include <utility>
-#include <vector>
+#include "llvm/Support/Compiler.h"
+#include <string>
namespace llvm {
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_BasicBlockPassManager, /// BBPassManager
+ 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
/// interprocedural optimization or you do not fit into any of the more
///
class Pass {
AnalysisResolver *Resolver; // Used to resolve analysis
- intptr_t PassID;
+ const void *PassID;
+ PassKind Kind;
+ void operator=(const Pass&) LLVM_DELETED_FUNCTION;
+ Pass(const Pass &) LLVM_DELETED_FUNCTION;
- void operator=(const Pass&); // DO NOT IMPLEMENT
- Pass(const Pass &); // DO NOT IMPLEMENT
-
public:
- explicit Pass(intptr_t pid) : Resolver(0), PassID(pid) {
- assert(pid && "pid cannot be 0");
- }
- explicit Pass(const void *pid) : Resolver(0), PassID((intptr_t)pid) {
- assert(pid && "pid cannot be 0");
- }
+ 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.
///
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.
+ ///
+ virtual bool doInitialization(Module &) { return false; }
+
+ /// doFinalization - Virtual method overriden by subclasses to do any
+ /// necessary clean up after all passes have run.
///
- const PassInfo *getPassInfo() const;
+ 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
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 = PMT_Unknown) {}
+ /// 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
- inline void setResolver(AnalysisResolver *AR) {
- assert (!Resolver && "Resolver is already set");
- Resolver = AR;
- }
- inline AnalysisResolver *getResolver() {
- return Resolver;
- }
+ 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
///
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.
+ /// check state of analysis information.
virtual void verifyAnalysis() const;
// dumpPassStructure - Implement the -debug-passes=PassStructure option
virtual void dumpPassStructure(unsigned Offset = 0);
- template<typename AnalysisClass>
- static const PassInfo *getClassPassInfo() {
- return lookupPassInfo(intptr_t(&AnalysisClass::ID));
- }
-
// lookupPassInfo - Return the pass info object for the specified pass class,
// or null if it is not known.
- static const PassInfo *lookupPassInfo(intptr_t TI);
+ static const PassInfo *lookupPassInfo(const void *TI);
// 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);
+ // createPass - Create a object for the specified pass class,
+ // or null if it is not known.
+ 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
/// 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
AnalysisType &getAnalysis(Function &F); // Defined in PassAnalysisSupport.h
template<typename AnalysisType>
- AnalysisType &getAnalysisID(const PassInfo *PI) const;
+ AnalysisType &getAnalysisID(AnalysisID PI) const;
template<typename AnalysisType>
- AnalysisType &getAnalysisID(const PassInfo *PI, Function &F);
+ AnalysisType &getAnalysisID(AnalysisID PI, Function &F);
};
///
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;
- virtual void assignPassManager(PMStack &PMS,
- PassManagerType T = PMT_ModulePassManager);
+ void assignPassManager(PMStack &PMS, PassManagerType T) override;
/// Return what kind of Pass Manager can manage this pass.
- virtual PassManagerType getPotentialPassManagerType() const;
+ PassManagerType getPotentialPassManagerType() const override;
- explicit ModulePass(intptr_t pid) : Pass(pid) {}
- explicit ModulePass(const void *pid) : Pass(pid) {}
+ explicit ModulePass(char &pid) : Pass(PT_Module, pid) {}
// Force out-of-line virtual method.
virtual ~ModulePass();
};
///
virtual void initializePass();
+ ImmutablePass *getAsImmutablePass() override { return this; }
+
/// ImmutablePasses are never run.
///
- bool runOnModule(Module &) { return false; }
+ bool runOnModule(Module &) override { return false; }
- explicit ImmutablePass(intptr_t pid) : ModulePass(pid) {}
- explicit ImmutablePass(const void *pid)
+ explicit ImmutablePass(char &pid)
: ModulePass(pid) {}
-
+
// Force out-of-line virtual method.
virtual ~ImmutablePass();
};
///
class FunctionPass : public Pass {
public:
- explicit FunctionPass(intptr_t pid) : Pass(pid) {}
- explicit FunctionPass(const void *pid) : Pass(pid) {}
+ 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;
- /// doInitialization - Virtual method overridden by subclasses to do
- /// any necessary per-module initialization.
- ///
- virtual bool doInitialization(Module &);
-
/// 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 &);
-
- /// runOnModule - On a module, we run this pass by initializing,
- /// ronOnFunction'ing once for every function in the module, then by
- /// finalizing.
- ///
- virtual bool runOnModule(Module &M);
-
- /// run - On a function, we simply initialize, run the function, then
- /// finalize.
- ///
- bool run(Function &F);
-
- virtual void assignPassManager(PMStack &PMS,
- PassManagerType T = PMT_FunctionPassManager);
+ void assignPassManager(PMStack &PMS, PassManagerType T) override;
/// Return what kind of Pass Manager can manage this pass.
- virtual PassManagerType getPotentialPassManagerType() const;
+ PassManagerType getPotentialPassManagerType() const override;
+
+protected:
+ /// skipOptnoneFunction - This function has Attribute::OptimizeNone
+ /// and most transformation passes should skip it.
+ bool skipOptnoneFunction(const Function &F) const;
};
///
class BasicBlockPass : public Pass {
public:
- explicit BasicBlockPass(intptr_t pid) : Pass(pid) {}
- explicit BasicBlockPass(const void *pid) : Pass(pid) {}
+ explicit BasicBlockPass(char &pid) : Pass(PT_BasicBlock, pid) {}
- /// doInitialization - Virtual method overridden by subclasses to do
- /// any necessary per-module initialization.
- ///
- virtual bool doInitialization(Module &);
+ /// 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 doFinalization(Function &);
- /// doFinalization - Virtual method overriden by subclasses to do any post
- /// processing needed after all passes have run.
- ///
- virtual bool doFinalization(Module &);
-
-
- // To run this pass on a function, we simply call runOnBasicBlock once for
- // each function.
- //
- bool runOnFunction(Function &F);
-
- virtual void assignPassManager(PMStack &PMS,
- PassManagerType T = PMT_BasicBlockPassManager);
+ void assignPassManager(PMStack &PMS, PassManagerType T) override;
/// Return what kind of Pass Manager can manage this pass.
- virtual PassManagerType getPotentialPassManagerType() const;
+ PassManagerType getPotentialPassManagerType() const override;
+
+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
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