-//===- 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/Pass.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/DenseMap.h"
+#include <vector>
+#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;
+ class PMDataManager;
-/// FunctionPassManager and PassManager, two top level managers, serve
-/// as the public interface of pass manager infrastructure.
-enum TopLevelManagerType {
- TLM_Function, // FunctionPassManager
- TLM_Pass // PassManager
-};
-
// enums for debugging strings
enum PassDebuggingString {
EXECUTION_MSG, // "Executing Pass '"
ON_BASICBLOCK_MSG, // "' on BasicBlock '" + PassName + "'...\n"
ON_FUNCTION_MSG, // "' on Function '" + FunctionName + "'...\n"
ON_MODULE_MSG, // "' on Module '" + ModuleName + "'...\n"
+ ON_REGION_MSG, // " 'on Region ...\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 - This class implements a stack data structure of PMDataManager
+/// pointers.
+///
+/// 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.
+class PMStack {
+public:
+ typedef std::vector<PMDataManager *>::const_reverse_iterator iterator;
+ iterator begin() const { return S.rbegin(); }
+ iterator end() const { return S.rend(); }
+
+ void pop();
+ PMDataManager *top() const { return S.back(); }
+ void push(PMDataManager *PM);
+ bool empty() const { return S.empty(); }
+
+ void dump() const;
+
+private:
+ std::vector<PMDataManager *> S;
+};
+
+
//===----------------------------------------------------------------------===//
// PMTopLevelManager
//
/// PMTopLevelManager manages LastUser info and collects common APIs used by
/// top level pass managers.
class PMTopLevelManager {
-public:
+protected:
+ explicit PMTopLevelManager(PMDataManager *PMDM);
- 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
- /// P are run before P is run. Update analysis info maintained by
- /// the manager. Remove dead passes. This is a recursive function.
- void schedulePass(Pass *P);
+ void initializeAllAnalysisInfo();
+private:
/// This is implemented by top level pass manager and used by
/// schedulePass() to add analysis info passes that are not available.
virtual void addTopLevelPass(Pass *P) = 0;
+public:
+ /// Schedule pass P for execution. Make sure that passes required by
+ /// P are run before P is run. Update analysis info maintained by
+ /// the manager. Remove dead passes. This is a recursive function.
+ void schedulePass(Pass *P);
+
/// Set pass P as the last user of the given analysis passes.
- void setLastUser(
std::vector<Pass *> &AnalysisPasses, Pass *P);
+ void setLastUser(
const SmallVectorImpl<Pass *> &AnalysisPasses, Pass *P);
/// Collect passes whose last user is P
- void collectLastUses(
std::vector<Pass *> &LastUses, Pass *P);
+ void collectLastUses(
SmallVectorImpl<Pass *> &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);
+
virtual ~PMTopLevelManager();
/// Add immutable pass and initialize it.
ImmutablePasses.push_back(P);
}
- inline std::vector<ImmutablePass *>& getImmutablePasses() {
+ inline SmallVectorImpl<ImmutablePass *>& getImmutablePasses() {
return ImmutablePasses;
}
- void addPassManager(Pass *Manager) {
+ void addPassManager(PMDataManager *Manager) {
PassManagers.push_back(Manager);
}
void dumpPasses() const;
void dumpArguments() const;
- void initializeAllAnalysisInfo();
-
// Active Pass Managers
PMStack activeStack;
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;
};
class PMDataManager {
public:
- PMDataManager(int Depth) : TPM(NULL), Depth(Depth) {
+ explicit PMDataManager() : TPM(NULL), Depth(0) {
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, enum PassDebuggingString);
+ /// 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, AnalysisID PI, Function &F);
+
/// Initialize available analysis information.
void initializeAnalysisInfo() {
AvailableAnalysis.clear();
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(SmallVectorImpl<Pass *> &RequiredPasses,
+ SmallVectorImpl<AnalysisID> &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
void setTopLevelManager(PMTopLevelManager *T) { TPM = T; }
unsigned getDepth() const { return Depth; }
+ void setDepth(unsigned newDepth) { Depth = newDepth; }
// Print routines used by debug-pass
void dumpLastUses(Pass *P, unsigned Offset) const;
void dumpPassArguments() const;
void dumpPassInfo(Pass *P, enum PassDebuggingString S1,
- enum PassDebuggingString S2, std::string Msg);
- void dumpAnalysisSetInfo(const char *Msg, Pass *P,
- const std::vector<AnalysisID> &Set) const;
+ enum PassDebuggingString S2, StringRef Msg);
+ void dumpRequiredSet(const Pass *P) const;
+ void dumpPreservedSet(const Pass *P) const;
- virtual unsigned getNumContainedPasses() {
- return PassVector.size();
+ virtual unsigned getNumContainedPasses() const {
+ return (unsigned)PassVector.size();
}
virtual PassManagerType getPassManagerType() const {
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()
+ : ModulePass(ID), PMDataManager() { }
/// 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();
}
};
+Timer *getPassTimer(Pass *);
+
}
-extern void StartPassTimer(Pass *);
-extern void StopPassTimer(Pass *);
+#endif
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