//===- 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 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.
namespace llvm {
class Value;
-struct BasicBlock;
+class BasicBlock;
class Function;
class Module;
class AnalysisUsage;
class PassInfo;
class ImmutablePass;
-template<class UnitType> class PassManagerT;
+template<class Trait> class PassManagerT;
+class BasicBlockPassManager;
+class FunctionPassManagerT;
+class ModulePassManager;
struct AnalysisResolver;
// AnalysisID - Use the PassInfo to identify a pass...
/// constrained passes described below.
///
class Pass {
- friend class AnalysisResolver;
+ friend struct AnalysisResolver;
AnalysisResolver *Resolver; // AnalysisResolver this pass is owned by...
const PassInfo *PassInfoCache;
/// runPass - Run this pass, returning true if a modification was made to the
/// module argument. This should be implemented by all concrete subclasses.
///
- virtual bool runPass(Module &M) = 0;
+ virtual bool runPass(Module &M) { return false; }
+ virtual bool runPass(BasicBlock&) { 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;
+ virtual void print(std::ostream &O, const Module *M) const;
void dump() const; // dump - call print(std::cerr, 0);
}
private:
- friend class PassManagerT<Module>;
- friend class PassManagerT<Function>;
- friend class PassManagerT<BasicBlock>;
+ template<typename Trait> friend class PassManagerT;
+ friend class ModulePassManager;
+ friend class FunctionPassManagerT;
+ friend class BasicBlockPassManager;
};
inline std::ostream &operator<<(std::ostream &OS, const Pass &P) {
//===----------------------------------------------------------------------===//
/// ModulePass class - This class is used to implement unstructured
-/// interprocedural optimizations and analyses. ModulePass's may do anything
+/// interprocedural optimizations and analyses. ModulePasses may do anything
/// they want to the program.
///
-struct ModulePass : public Pass {
-
+class ModulePass : public Pass {
+public:
/// runOnModule - Virtual method overriden by subclasses to process the module
/// being operated on.
virtual bool runOnModule(Module &M) = 0;
- bool runPass(Module &M) { return runOnModule(M); }
+ virtual bool runPass(Module &M) { return runOnModule(M); }
+ virtual bool runPass(BasicBlock&) { return false; }
- virtual void addToPassManager(PassManagerT<Module> *PM, AnalysisUsage &AU);
+ virtual void addToPassManager(ModulePassManager *PM, AnalysisUsage &AU);
};
/// not need to be run. This is useful for things like target information and
/// "basic" versions of AnalysisGroups.
///
-struct ImmutablePass : public ModulePass {
+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,
virtual bool runOnModule(Module &M) { return false; }
private:
- friend class PassManagerT<Module>;
- virtual void addToPassManager(PassManagerT<Module> *PM, AnalysisUsage &AU);
+ template<typename Trait> friend class PassManagerT;
+ friend class ModulePassManager;
+ virtual void addToPassManager(ModulePassManager *PM, AnalysisUsage &AU);
};
//===----------------------------------------------------------------------===//
/// 2. Optimizing a function does not cause the addition or removal of any
/// functions in the module
///
-struct FunctionPass : public ModulePass {
+class FunctionPass : public ModulePass {
+public:
/// doInitialization - Virtual method overridden by subclasses to do
/// any necessary per-module initialization.
///
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);
+ template<typename Trait> friend class PassManagerT;
+ friend class ModulePassManager;
+ friend class FunctionPassManagerT;
+ friend class BasicBlockPassManager;
+ virtual void addToPassManager(ModulePassManager *PM, AnalysisUsage &AU);
+ virtual void addToPassManager(FunctionPassManagerT *PM, AnalysisUsage &AU);
};
/// 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 {
+class BasicBlockPass : public FunctionPass {
+public:
/// doInitialization - Virtual method overridden by subclasses to do
/// any necessary per-module initialization.
///
/// To run directly on the basic block, we initialize, runOnBasicBlock, then
/// finalize.
///
- bool runPass(BasicBlock &BB);
+ virtual bool runPass(Module &M) { return false; }
+ virtual bool runPass(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);
+ template<typename Trait> friend class PassManagerT;
+ friend class FunctionPassManagerT;
+ friend class BasicBlockPassManager;
+ virtual void addToPassManager(FunctionPassManagerT *PM, AnalysisUsage &AU);
+ virtual void addToPassManager(BasicBlockPassManager *PM,AnalysisUsage &AU);
};
/// If the user specifies the -time-passes argument on an LLVM tool command line
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