-//===- IntervalPartition.h - Interval partition Calculation ------*- C++ -*--=//
+//===- IntervalPartition.h - Interval partition Calculation -----*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
//
// This file contains the declaration of the IntervalPartition class, which
// calculates and represents the interval partition of a function, or a
//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_INTERVAL_PARTITION_H
-#define LLVM_INTERVAL_PARTITION_H
+#ifndef LLVM_ANALYSIS_INTERVALPARTITION_H
+#define LLVM_ANALYSIS_INTERVALPARTITION_H
#include "llvm/Analysis/Interval.h"
#include "llvm/Pass.h"
+#include <map>
+
+namespace llvm {
//===----------------------------------------------------------------------===//
//
// IntervalPartition - This class builds and holds an "interval partition" for
// a function. This partition divides the control flow graph into a set of
-// maximal intervals, as defined with the properties above. Intuitively, a
-// BasicBlock is a (possibly nonexistent) loop with a "tail" of non looping
+// maximal intervals, as defined with the properties above. Intuitively, an
+// interval is a (possibly nonexistent) loop with a "tail" of non-looping
// nodes following it.
//
-class IntervalPartition : public FunctionPass, public std::vector<Interval*> {
+class IntervalPartition : public FunctionPass {
typedef std::map<BasicBlock*, Interval*> IntervalMapTy;
IntervalMapTy IntervalMap;
typedef std::vector<Interval*> IntervalListTy;
Interval *RootInterval;
+ std::vector<Interval*> Intervals;
public:
- static AnalysisID ID; // We are an analysis, we must have an ID
-
- IntervalPartition() : RootInterval(0) {}
+ static char ID; // Pass identification, replacement for typeid
- const char *getPassName() const { return "Interval Partition Construction"; }
+ IntervalPartition() : FunctionPass(ID), RootInterval(nullptr) {
+ initializeIntervalPartitionPass(*PassRegistry::getPassRegistry());
+ }
// run - Calculate the interval partition for this function
- virtual bool runOnFunction(Function &F);
+ bool runOnFunction(Function &F) override;
// IntervalPartition ctor - Build a reduced interval partition from an
// existing interval graph. This takes an additional boolean parameter to
//
IntervalPartition(IntervalPartition &I, bool);
- // Destructor - Free memory
- ~IntervalPartition() { destroy(); }
+ // print - Show contents in human readable format...
+ void print(raw_ostream &O, const Module* = nullptr) const override;
// getRootInterval() - Return the root interval that contains the starting
// block of the function.
// isDegeneratePartition() - Returns true if the interval partition contains
// a single interval, and thus cannot be simplified anymore.
- bool isDegeneratePartition() { return size() == 1; }
+ bool isDegeneratePartition() { return Intervals.size() == 1; }
// TODO: isIrreducible - look for triangle graph.
// getBlockInterval - Return the interval that a basic block exists in.
inline Interval *getBlockInterval(BasicBlock *BB) {
IntervalMapTy::iterator I = IntervalMap.find(BB);
- return I != IntervalMap.end() ? I->second : 0;
+ return I != IntervalMap.end() ? I->second : nullptr;
}
// getAnalysisUsage - Implement the Pass API
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.setPreservesAll();
- AU.addProvided(ID);
}
-private:
- // destroy - Reset state back to before function was analyzed
- void destroy();
+ // Interface to Intervals vector...
+ const std::vector<Interval*> &getIntervals() const { return Intervals; }
+
+ // releaseMemory - Reset state back to before function was analyzed
+ void releaseMemory() override;
+private:
// addIntervalToPartition - Add an interval to the internal list of intervals,
// and then add mappings from all of the basic blocks in the interval to the
// interval itself (in the IntervalMap).
// updatePredecessors - Interval generation only sets the successor fields of
// the interval data structures. After interval generation is complete,
- // run through all of the intervals and propogate successor info as
+ // run through all of the intervals and propagate successor info as
// predecessor info.
//
void updatePredecessors(Interval *Int);
};
+} // End llvm namespace
+
#endif