//
// 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.
//
//===----------------------------------------------------------------------===//
//
#define LLVM_LOOP_PASS_H
#include "llvm/Analysis/LoopInfo.h"
+#include "llvm/Function.h"
#include "llvm/Pass.h"
#include "llvm/PassManagers.h"
-#include "llvm/Function.h"
+#include <deque>
namespace llvm {
class LPPassManager;
-class Loop;
class Function;
+class PMStack;
class LoopPass : public Pass {
+public:
+ explicit LoopPass(char &pid) : Pass(PT_Loop, pid) {}
- public:
- // runOnLoop - THis method should be implemented by the subclass to perform
- // whatever action is necessary for the specfied Loop.
- virtual bool runOnLoop (Loop *L, LPPassManager &LPM) = 0;
- virtual bool runOnFunctionBody (Function &F, LPPassManager &LPM) {
- return false;
- }
+ /// getPrinterPass - Get a pass to print the function corresponding
+ /// to a Loop.
+ Pass *createPrinterPass(raw_ostream &O, const std::string &Banner) const;
+
+ // runOnLoop - This method should be implemented by the subclass to perform
+ // whatever action is necessary for the specified Loop.
+ virtual bool runOnLoop(Loop *L, LPPassManager &LPM) = 0;
// Initialization and finalization hooks.
- virtual bool doInitialization(Loop *L, LPPassManager &LPM) {
- return false;
+ virtual bool doInitialization(Loop *L, LPPassManager &LPM) {
+ return false;
}
// Finalization hook does not supply Loop because at this time
// LPPassManger as expected.
void preparePassManager(PMStack &PMS);
- /// Assign pass manager to manager this pass
+ /// Assign pass manager to manage this pass
virtual void assignPassManager(PMStack &PMS,
- PassManagerType PMT = PMT_LoopPassManager);
+ PassManagerType PMT);
+ /// Return what kind of Pass Manager can manage this pass.
+ virtual PassManagerType getPotentialPassManagerType() const {
+ return PMT_LoopPassManager;
+ }
+
+ //===--------------------------------------------------------------------===//
+ /// SimpleAnalysis - Provides simple interface to update analysis info
+ /// maintained by various passes. Note, if required this interface can
+ /// be extracted into a separate abstract class but it would require
+ /// additional use of multiple inheritance in Pass class hierarchy, something
+ /// we are trying to avoid.
+
+ /// Each loop pass can override these simple analysis hooks to update
+ /// desired analysis information.
+ /// cloneBasicBlockAnalysis - Clone analysis info associated with basic block.
+ virtual void cloneBasicBlockAnalysis(BasicBlock *F, BasicBlock *T, Loop *L) {}
+
+ /// deleteAnalysisValue - Delete analysis info associated with value V.
+ virtual void deleteAnalysisValue(Value *V, Loop *L) {}
};
class LPPassManager : public FunctionPass, public PMDataManager {
-
public:
- LPPassManager(int Depth);
+ static char ID;
+ explicit LPPassManager();
/// 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);
/// Pass Manager itself does not invalidate any analysis info.
- void getAnalysisUsage(AnalysisUsage &Info) const {
- // LPPassManager needs LoopInfo. In the long term LoopInfo class will
- // be consumed by LPPassManager.
- Info.addRequired<LoopInfo>();
- Info.setPreservesAll();
- }
-
+ // LPPassManager needs LoopInfo.
+ void getAnalysisUsage(AnalysisUsage &Info) const;
+
virtual const char *getPassName() const {
return "Loop Pass Manager";
}
-
- // Print passes managed by this manager
- void dumpPassStructure(unsigned Offset) {
- llvm::cerr << std::string(Offset*2, ' ') << "Loop Pass Manager\n";
- for (unsigned Index = 0; Index < getNumContainedPasses(); ++Index) {
- Pass *P = getContainedPass(Index);
- P->dumpPassStructure(Offset + 1);
- dumpLastUses(P, Offset+1);
- }
- }
-
- Pass *getContainedPass(unsigned N) {
- assert ( N < PassVector.size() && "Pass number out of range!");
- Pass *FP = static_cast<Pass *>(PassVector[N]);
- return FP;
+
+ virtual PMDataManager *getAsPMDataManager() { return this; }
+ virtual Pass *getAsPass() { return this; }
+
+ /// Print passes managed by this manager
+ void dumpPassStructure(unsigned Offset);
+
+ LoopPass *getContainedPass(unsigned N) {
+ assert(N < PassVector.size() && "Pass number out of range!");
+ LoopPass *LP = static_cast<LoopPass *>(PassVector[N]);
+ return LP;
}
- virtual PassManagerType getPassManagerType() const {
- return PMT_LoopPassManager;
+ virtual PassManagerType getPassManagerType() const {
+ return PMT_LoopPassManager;
}
public:
- // Delete loop from the loop queue. This is used by Loop pass to inform
- // Loop Pass Manager that it should skip rest of the passes for this loop.
+ // Delete loop from the loop queue and loop nest (LoopInfo).
void deleteLoopFromQueue(Loop *L);
+ // Insert loop into the loop queue and add it as a child of the
+ // given parent.
+ void insertLoop(Loop *L, Loop *ParentLoop);
+
+ // Insert a loop into the loop queue.
+ void insertLoopIntoQueue(Loop *L);
+
// Reoptimize this loop. LPPassManager will re-insert this loop into the
// queue. This allows LoopPass to change loop nest for the loop. This
// utility may send LPPassManager into infinite loops so use caution.
void redoLoop(Loop *L);
+
+ //===--------------------------------------------------------------------===//
+ /// SimpleAnalysis - Provides simple interface to update analysis info
+ /// maintained by various passes. Note, if required this interface can
+ /// be extracted into a separate abstract class but it would require
+ /// additional use of multiple inheritance in Pass class hierarchy, something
+ /// we are trying to avoid.
+
+ /// cloneBasicBlockSimpleAnalysis - Invoke cloneBasicBlockAnalysis hook for
+ /// all passes that implement simple analysis interface.
+ void cloneBasicBlockSimpleAnalysis(BasicBlock *From, BasicBlock *To, Loop *L);
+
+ /// deleteSimpleAnalysisValue - Invoke deleteAnalysisValue hook for all passes
+ /// that implement simple analysis interface.
+ void deleteSimpleAnalysisValue(Value *V, Loop *L);
+
private:
std::deque<Loop *> LQ;
bool skipThisLoop;
bool redoThisLoop;
+ LoopInfo *LI;
+ Loop *CurrentLoop;
};
} // End llvm namespace
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