-//===- llvm/Pass.h - Base class for XForm Passes -----------------*- C++ -*--=//
+//===- 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.
#include <map>
#include <iosfwd>
#include <typeinfo>
+#include <cassert>
+
+namespace llvm {
+
class Value;
class BasicBlock;
class Function;
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;
/// 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
- /// intelligable name for the pass.
+ /// intelligible name for the pass.
///
virtual const char *getPassName() const;
///
const PassInfo *getPassInfo() const;
- /// run - Run this pass, returning true if a modification was made to the
+ /// 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 run(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
- /// neccesary to implement this method. Beware that the module pointer MAY be
+ /// necessary to implement this method. Beware that the module pointer MAY be
/// null. This automatically forwards to a virtual function that does 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);
/// automatically as the transform is performed.
///
template<typename AnalysisType>
- AnalysisType *getAnalysisToUpdate() const {
- assert(Resolver && "Pass not resident in a PassManager object!");
- const PassInfo *PI = getClassPassInfo<AnalysisType>();
- if (PI == 0) return 0;
- return dynamic_cast<AnalysisType*>(Resolver->getAnalysisToUpdate(PI));
- }
+ AnalysisType *getAnalysisToUpdate() const; // Defined in PassAnalysisSupport.h
/// mustPreserveAnalysisID - This method serves the same function as
/// getAnalysisToUpdate, but works if you just have an AnalysisID. This
Pass *ResultPass = 0;
for (unsigned i = 0; ; ++i) {
assert(i != AnalysisImpls.size() &&
- "getAnalysis*() called on an analysis that we not "
+ "getAnalysis*() called on an analysis that was not "
"'required' by pass!");
if (AnalysisImpls[i].first == PI) {
ResultPass = AnalysisImpls[i].second;
}
private:
- friend class PassManagerT<Module>;
- friend class PassManagerT<Function>;
- friend class PassManagerT<BasicBlock>;
- virtual void addToPassManager(PassManagerT<Module> *PM, AnalysisUsage &AU);
+ 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) {
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:
+ /// runOnModule - Virtual method overriden by subclasses to process the module
+ /// being operated on.
+ virtual bool runOnModule(Module &M) = 0;
+
+ virtual bool runPass(Module &M) { return runOnModule(M); }
+ virtual bool runPass(BasicBlock&) { return false; }
+
+ 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 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,
/// ImmutablePasses are never run.
///
- virtual bool run(Module &M) { return false; }
+ 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);
};
-
//===----------------------------------------------------------------------===//
/// FunctionPass class - This class is used to implement most global
/// optimizations. Optimizations should subclass this class if they meet the
/// following constraints:
///
-/// 1. Optimizations are organized globally, ie a function at a time
+/// 1. Optimizations are organized globally, i.e., a function at a time
/// 2. Optimizing a function does not cause the addition or removal of any
/// functions in the module
///
-struct FunctionPass : public Pass {
+class FunctionPass : public ModulePass {
+public:
/// doInitialization - Virtual method overridden by subclasses to do
- /// any neccesary per-module initialization.
+ /// any necessary per-module initialization.
///
virtual bool doInitialization(Module &M) { return false; }
///
virtual bool doFinalization(Module &M) { return false; }
- /// run - On a module, we run this pass by initializing, ronOnFunction'ing
- /// once for every function in the module, then by finalizing.
+ /// runOnModule - 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);
+ virtual bool runOnModule(Module &M);
/// 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);
+ 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 neccesary per-module initialization.
+ /// any necessary per-module initialization.
///
virtual bool doInitialization(Module &M) { return false; }
/// doInitialization - Virtual method overridden by BasicBlockPass subclasses
- /// to do any neccesary per-function initialization.
+ /// to do any necessary per-function initialization.
///
virtual bool doInitialization(Function &F) { return false; }
/// To run directly on the basic block, we initialize, runOnBasicBlock, then
/// finalize.
///
- bool run(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
+/// 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,
-// but that we want to seperate out to make it easier to read the header files.
+// but that we want to separate out to make it easier to read the header files.
//
#include "llvm/PassSupport.h"
#include "llvm/PassAnalysisSupport.h"
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