//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_LOOP_PASS_H
-#define LLVM_LOOP_PASS_H
+#ifndef LLVM_ANALYSIS_LOOPPASS_H
+#define LLVM_ANALYSIS_LOOPPASS_H
#include "llvm/Analysis/LoopInfo.h"
+#include "llvm/IR/LegacyPassManagers.h"
#include "llvm/Pass.h"
-#include "llvm/PassManagers.h"
-#include "llvm/Function.h"
+#include <deque>
namespace llvm {
class LoopPass : public Pass {
public:
- explicit LoopPass(intptr_t pid) : Pass(pid) {}
- explicit LoopPass(void *pid) : Pass(pid) {}
+ explicit LoopPass(char &pid) : Pass(PT_Loop, pid) {}
+
+ /// getPrinterPass - Get a pass to print the function corresponding
+ /// to a Loop.
+ Pass *createPrinterPass(raw_ostream &O,
+ const std::string &Banner) const override;
// 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;
- virtual bool runOnFunctionBody(Function &F, LPPassManager &LPM) {
- return false;
- }
+
+ using llvm::Pass::doInitialization;
+ using llvm::Pass::doFinalization;
// Initialization and finalization hooks.
virtual bool doInitialization(Loop *L, LPPassManager &LPM) {
// LPPassManager passes. In such case, pop LPPassManager from the
// stack. This will force assignPassManager() to create new
// LPPassManger as expected.
- void preparePassManager(PMStack &PMS);
+ void preparePassManager(PMStack &PMS) override;
- /// Assign pass manager to manager this pass
- virtual void assignPassManager(PMStack &PMS,
- PassManagerType PMT = PMT_LoopPassManager);
+ /// Assign pass manager to manage this pass
+ void assignPassManager(PMStack &PMS, PassManagerType PMT) override;
/// Return what kind of Pass Manager can manage this pass.
- virtual PassManagerType getPotentialPassManagerType() const {
+ PassManagerType getPotentialPassManagerType() const override {
return PMT_LoopPassManager;
}
/// cloneBasicBlockAnalysis - Clone analysis info associated with basic block.
virtual void cloneBasicBlockAnalysis(BasicBlock *F, BasicBlock *T, Loop *L) {}
- /// deletekAnalysisValue - Delete analysis info associated with value V.
+ /// deleteAnalysisValue - Delete analysis info associated with value V.
virtual void deleteAnalysisValue(Value *V, Loop *L) {}
+
+ /// Delete analysis info associated with Loop L.
+ /// Called to notify a Pass that a loop has been deleted and any
+ /// associated analysis values can be deleted.
+ virtual void deleteAnalysisLoop(Loop *L) {}
+
+protected:
+ /// skipOptnoneFunction - Containing function has Attribute::OptimizeNone
+ /// and most transformation passes should skip it.
+ bool skipOptnoneFunction(const Loop *L) const;
};
class LPPassManager : public FunctionPass, public PMDataManager {
public:
static char ID;
- explicit LPPassManager(int Depth);
+ 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);
+ bool runOnFunction(Function &F) override;
/// Pass Manager itself does not invalidate any analysis info.
// LPPassManager needs LoopInfo.
- void getAnalysisUsage(AnalysisUsage &Info) const;
+ void getAnalysisUsage(AnalysisUsage &Info) const override;
- virtual const char *getPassName() const {
+ const char *getPassName() const override {
return "Loop Pass Manager";
}
+ PMDataManager *getAsPMDataManager() override { return this; }
+ Pass *getAsPass() override { return this; }
+
/// Print passes managed by this manager
- void dumpPassStructure(unsigned Offset);
+ void dumpPassStructure(unsigned Offset) override;
- Pass *getContainedPass(unsigned N) {
+ LoopPass *getContainedPass(unsigned N) {
assert(N < PassVector.size() && "Pass number out of range!");
- Pass *FP = static_cast<Pass *>(PassVector[N]);
- return FP;
+ LoopPass *LP = static_cast<LoopPass *>(PassVector[N]);
+ return LP;
}
- virtual PassManagerType getPassManagerType() const {
+ PassManagerType getPassManagerType() const override {
return PMT_LoopPassManager;
}
public:
- // Delete loop from the loop queue and loop nest (LoopInfo).
- void deleteLoopFromQueue(Loop *L);
-
- // Insert loop into the loop nest(LoopInfo) and loop queue(LQ).
- void insertLoop(Loop *L, Loop *ParentLoop);
-
- // 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);
+ // Add a new loop into the loop queue as a child of the given parent, or at
+ // the top level if \c ParentLoop is null.
+ Loop &addLoop(Loop *ParentLoop);
//===--------------------------------------------------------------------===//
/// SimpleAnalysis - Provides simple interface to update analysis info
/// that implement simple analysis interface.
void deleteSimpleAnalysisValue(Value *V, Loop *L);
+ /// Invoke deleteAnalysisLoop hook for all passes that implement simple
+ /// analysis interface.
+ void deleteSimpleAnalysisLoop(Loop *L);
+
private:
std::deque<Loop *> LQ;
- bool skipThisLoop;
- bool redoThisLoop;
LoopInfo *LI;
Loop *CurrentLoop;
};