-//===- llvm/PassManager.h - Pass Inftrastructre classes --------*- C++ -*-===//
+//===- llvm/PassManagers.h - Pass Infrastructure classes -------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Devang Patel 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.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
-#include "llvm/PassManager.h"
+#ifndef LLVM_PASSMANAGERS_H
+#define LLVM_PASSMANAGERS_H
-using namespace llvm;
-class llvm::PMDataManager;
-class llvm::PMStack;
+#include "llvm/PassManager.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/DenseMap.h"
+#include <deque>
+#include <map>
//===----------------------------------------------------------------------===//
// Overview:
//
// Pass Manager Infrastructure uses multiple pass managers. They are
// PassManager, FunctionPassManager, MPPassManager, FPPassManager, BBPassManager.
-// This class hierarcy uses multiple inheritance but pass managers do not derive
-// from another pass manager.
+// This class hierarchy uses multiple inheritance but pass managers do not
+// derive from another pass manager.
//
// PassManager and FunctionPassManager are two top-level pass manager that
// represents the external interface of this entire pass manager infrastucture.
// MPPassManagers.
//===----------------------------------------------------------------------===//
+#include "llvm/Support/PrettyStackTrace.h"
+
namespace llvm {
+ class Module;
+ class Pass;
+ class StringRef;
+ class Value;
+ class Timer;
/// FunctionPassManager and PassManager, two top level managers, serve
/// as the public interface of pass manager infrastructure.
TLM_Pass // PassManager
};
+// enums for debugging strings
+enum PassDebuggingString {
+ EXECUTION_MSG, // "Executing Pass '"
+ MODIFICATION_MSG, // "' Made Modification '"
+ FREEING_MSG, // " Freeing Pass '"
+ ON_BASICBLOCK_MSG, // "' on BasicBlock '" + PassName + "'...\n"
+ ON_FUNCTION_MSG, // "' on Function '" + FunctionName + "'...\n"
+ ON_MODULE_MSG, // "' on Module '" + ModuleName + "'...\n"
+ ON_LOOP_MSG, // " 'on Loop ...\n'"
+ ON_CG_MSG // "' on Call Graph ...\n'"
+};
+
+/// PassManagerPrettyStackEntry - This is used to print informative information
+/// about what pass is running when/if a stack trace is generated.
+class PassManagerPrettyStackEntry : public PrettyStackTraceEntry {
+ Pass *P;
+ Value *V;
+ Module *M;
+public:
+ explicit PassManagerPrettyStackEntry(Pass *p)
+ : P(p), V(0), M(0) {} // When P is releaseMemory'd.
+ PassManagerPrettyStackEntry(Pass *p, Value &v)
+ : P(p), V(&v), M(0) {} // When P is run on V
+ PassManagerPrettyStackEntry(Pass *p, Module &m)
+ : P(p), V(0), M(&m) {} // When P is run on M
+
+ /// print - Emit information about this stack frame to OS.
+ virtual void print(raw_ostream &OS) const;
+};
+
+
+//===----------------------------------------------------------------------===//
+// PMStack
+//
+/// PMStack
+/// Top level pass managers (see PassManager.cpp) maintain active Pass Managers
+/// using PMStack. Each Pass implements assignPassManager() to connect itself
+/// with appropriate manager. assignPassManager() walks PMStack to find
+/// suitable manager.
+///
+/// PMStack is just a wrapper around standard deque that overrides pop() and
+/// push() methods.
+class PMStack {
+public:
+ typedef std::deque<PMDataManager *>::reverse_iterator iterator;
+ iterator begin() { return S.rbegin(); }
+ iterator end() { return S.rend(); }
+
+ void handleLastUserOverflow();
+
+ void pop();
+ inline PMDataManager *top() { return S.back(); }
+ void push(PMDataManager *PM);
+ inline bool empty() { return S.empty(); }
+
+ void dump();
+private:
+ std::deque<PMDataManager *> S;
+};
+
+
//===----------------------------------------------------------------------===//
// PMTopLevelManager
//
class PMTopLevelManager {
public:
- virtual unsigned getNumContainedManagers() {
- return PassManagers.size();
+ virtual unsigned getNumContainedManagers() const {
+ return (unsigned)PassManagers.size();
}
/// Schedule pass P for execution. Make sure that passes required by
virtual void addTopLevelPass(Pass *P) = 0;
/// Set pass P as the last user of the given analysis passes.
- void setLastUser(std::vector<Pass *> &AnalysisPasses, Pass *P);
+ void setLastUser(SmallVector<Pass *, 12> &AnalysisPasses, Pass *P);
/// Collect passes whose last user is P
- void collectLastUses(std::vector<Pass *> &LastUses, Pass *P);
+ void collectLastUses(SmallVector<Pass *, 12> &LastUses, Pass *P);
/// Find the pass that implements Analysis AID. Search immutable
/// passes and all pass managers. If desired pass is not found
/// then return NULL.
Pass *findAnalysisPass(AnalysisID AID);
- PMTopLevelManager(enum TopLevelManagerType t);
+ /// Find analysis usage information for the pass P.
+ AnalysisUsage *findAnalysisUsage(Pass *P);
+
+ explicit PMTopLevelManager(enum TopLevelManagerType t);
virtual ~PMTopLevelManager();
/// Add immutable pass and initialize it.
ImmutablePasses.push_back(P);
}
- inline std::vector<ImmutablePass *>& getImmutablePasses() {
+ inline SmallVector<ImmutablePass *, 8>& getImmutablePasses() {
return ImmutablePasses;
}
- void addPassManager(Pass *Manager) {
+ void addPassManager(PMDataManager *Manager) {
PassManagers.push_back(Manager);
}
protected:
/// Collection of pass managers
- std::vector<Pass *> PassManagers;
+ SmallVector<PMDataManager *, 8> PassManagers;
private:
/// Collection of pass managers that are not directly maintained
/// by this pass manager
- std::vector<PMDataManager *> IndirectPassManagers;
+ SmallVector<PMDataManager *, 8> IndirectPassManagers;
// Map to keep track of last user of the analysis pass.
// LastUser->second is the last user of Lastuser->first.
- std::map<Pass *, Pass *> LastUser;
+ DenseMap<Pass *, Pass *> LastUser;
+
+ // Map to keep track of passes that are last used by a pass.
+ // This inverse map is initialized at PM->run() based on
+ // LastUser map.
+ DenseMap<Pass *, SmallPtrSet<Pass *, 8> > InversedLastUser;
/// Immutable passes are managed by top level manager.
- std::vector<ImmutablePass *> ImmutablePasses;
+ SmallVector<ImmutablePass *, 8> ImmutablePasses;
+
+ DenseMap<Pass *, AnalysisUsage *> AnUsageMap;
};
/// used by pass managers.
class PMDataManager {
public:
- PMDataManager(int Depth) : TPM(NULL), Depth(Depth) {
+
+ explicit PMDataManager(int Depth) : TPM(NULL), Depth(Depth) {
initializeAnalysisInfo();
}
virtual ~PMDataManager();
-
- /// Return true IFF pass P's required analysis set does not required new
- /// manager.
- bool manageablePass(Pass *P);
+
+ virtual Pass *getAsPass() = 0;
/// Augment AvailableAnalysis by adding analysis made available by pass P.
void recordAvailableAnalysis(Pass *P);
+ /// verifyPreservedAnalysis -- Verify analysis presreved by pass P.
+ void verifyPreservedAnalysis(Pass *P);
+
/// Remove Analysis that is not preserved by the pass
void removeNotPreservedAnalysis(Pass *P);
- /// Remove dead passes
- void removeDeadPasses(Pass *P, std::string &Msg);
+ /// Remove dead passes used by P.
+ void removeDeadPasses(Pass *P, StringRef Msg,
+ enum PassDebuggingString);
+
+ /// Remove P.
+ void freePass(Pass *P, StringRef Msg,
+ enum PassDebuggingString);
/// Add pass P into the PassVector. Update
/// AvailableAnalysis appropriately if ProcessAnalysis is true.
void add(Pass *P, bool ProcessAnalysis = true);
+ /// Add RequiredPass into list of lower level passes required by pass P.
+ /// RequiredPass is run on the fly by Pass Manager when P requests it
+ /// through getAnalysis interface.
+ virtual void addLowerLevelRequiredPass(Pass *P, Pass *RequiredPass);
+
+ virtual Pass * getOnTheFlyPass(Pass *P, const PassInfo *PI, Function &F) {
+ assert (0 && "Unable to find on the fly pass");
+ return NULL;
+ }
+
/// Initialize available analysis information.
void initializeAnalysisInfo() {
- TransferLastUses.clear();
AvailableAnalysis.clear();
+ for (unsigned i = 0; i < PMT_Last; ++i)
+ InheritedAnalysis[i] = NULL;
}
- /// Populate RequiredPasses with the analysis pass that are required by
- /// pass P.
- void collectRequiredAnalysisPasses(std::vector<Pass *> &RequiredPasses,
- Pass *P);
+ // Return true if P preserves high level analysis used by other
+ // passes that are managed by this manager.
+ bool preserveHigherLevelAnalysis(Pass *P);
+
+
+ /// Populate RequiredPasses with analysis pass that are required by
+ /// pass P and are available. Populate ReqPassNotAvailable with analysis
+ /// pass that are required by pass P but are not available.
+ void collectRequiredAnalysis(SmallVector<Pass *, 8> &RequiredPasses,
+ SmallVector<AnalysisID, 8> &ReqPassNotAvailable,
+ Pass *P);
/// All Required analyses should be available to the pass as it runs! Here
/// we fill in the AnalysisImpls member of the pass so that it can
// Print routines used by debug-pass
void dumpLastUses(Pass *P, unsigned Offset) const;
void dumpPassArguments() const;
- void dumpPassInfo(Pass *P, std::string &Msg1, std::string &Msg2) const;
- void dumpAnalysisSetInfo(const char *Msg, Pass *P,
- const std::vector<AnalysisID> &Set) const;
+ void dumpPassInfo(Pass *P, enum PassDebuggingString S1,
+ enum PassDebuggingString S2, StringRef Msg);
+ void dumpRequiredSet(const Pass *P) const;
+ void dumpPreservedSet(const Pass *P) const;
- std::vector<Pass *>& getTransferredLastUses() {
- return TransferLastUses;
+ virtual unsigned getNumContainedPasses() const {
+ return (unsigned)PassVector.size();
}
- virtual unsigned getNumContainedPasses() {
- return PassVector.size();
- }
-
- virtual PassManagerType getPassManagerType() {
+ virtual PassManagerType getPassManagerType() const {
assert ( 0 && "Invalid use of getPassManagerType");
return PMT_Unknown;
}
-protected:
- // If a FunctionPass F is the last user of ModulePass info M
- // then the F's manager, not F, records itself as a last user of M.
- // Current pass manage is requesting parent manager to record parent
- // manager as the last user of these TrransferLastUses passes.
- std::vector<Pass *> TransferLastUses;
+ std::map<AnalysisID, Pass*> *getAvailableAnalysis() {
+ return &AvailableAnalysis;
+ }
+
+ // Collect AvailableAnalysis from all the active Pass Managers.
+ void populateInheritedAnalysis(PMStack &PMS) {
+ unsigned Index = 0;
+ for (PMStack::iterator I = PMS.begin(), E = PMS.end();
+ I != E; ++I)
+ InheritedAnalysis[Index++] = (*I)->getAvailableAnalysis();
+ }
+
+protected:
// Top level manager.
PMTopLevelManager *TPM;
// Collection of pass that are managed by this manager
- std::vector<Pass *> PassVector;
+ SmallVector<Pass *, 16> PassVector;
+
+ // Collection of Analysis provided by Parent pass manager and
+ // used by current pass manager. At at time there can not be more
+ // then PMT_Last active pass mangers.
+ std::map<AnalysisID, Pass *> *InheritedAnalysis[PMT_Last];
+
+ /// isPassDebuggingExecutionsOrMore - Return true if -debug-pass=Executions
+ /// or higher is specified.
+ bool isPassDebuggingExecutionsOrMore() const;
+
private:
+ void dumpAnalysisUsage(StringRef Msg, const Pass *P,
+ const AnalysisUsage::VectorType &Set) const;
+
// Set of available Analysis. This information is used while scheduling
- // pass. If a pass requires an analysis which is not not available then
- // equired analysis pass is scheduled to run before the pass itself is
+ // pass. If a pass requires an analysis which is not available then
+ // the required analysis pass is scheduled to run before the pass itself is
// scheduled to run.
std::map<AnalysisID, Pass*> AvailableAnalysis;
+ // Collection of higher level analysis used by the pass managed by
+ // this manager.
+ SmallVector<Pass *, 8> HigherLevelAnalysis;
+
unsigned Depth;
};
/// It batches all function passes and basic block pass managers together and
/// sequence them to process one function at a time before processing next
/// function.
-
class FPPassManager : public ModulePass, public PMDataManager {
-
public:
- FPPassManager(int Depth) : PMDataManager(Depth) { }
+ static char ID;
+ explicit FPPassManager(int Depth)
+ : ModulePass(&ID), PMDataManager(Depth) { }
/// 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 runOnFunction(Function &F);
bool runOnModule(Module &M);
+
+ /// cleanup - After running all passes, clean up pass manager cache.
+ void cleanup();
/// doInitialization - Run all of the initializers for the function passes.
///
bool doInitialization(Module &M);
- /// doFinalization - Run all of the initializers for the function passes.
+ /// doFinalization - Run all of the finalizers for the function passes.
///
bool doFinalization(Module &M);
+ virtual PMDataManager *getAsPMDataManager() { return this; }
+ virtual Pass *getAsPass() { return this; }
+
/// Pass Manager itself does not invalidate any analysis info.
void getAnalysisUsage(AnalysisUsage &Info) const {
Info.setPreservesAll();
// Print passes managed by this manager
void dumpPassStructure(unsigned Offset);
+ virtual const char *getPassName() const {
+ return "Function Pass Manager";
+ }
+
FunctionPass *getContainedPass(unsigned N) {
assert ( N < PassVector.size() && "Pass number out of range!");
FunctionPass *FP = static_cast<FunctionPass *>(PassVector[N]);
return FP;
}
- virtual PassManagerType getPassManagerType() {
+ virtual PassManagerType getPassManagerType() const {
return PMT_FunctionPassManager;
}
};
+Timer *getPassTimer(Pass *);
+
}
-extern void StartPassTimer(Pass *);
-extern void StopPassTimer(Pass *);
+#endif
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