-//===- IntervalPartition.h - Interval partition Calculation ------*- C++ -*--=//
+//===- IntervalPartition.h - Interval partition Calculation -----*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and 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
#include "llvm/Analysis/Interval.h"
#include "llvm/Pass.h"
+namespace llvm {
+
//===----------------------------------------------------------------------===//
//
// IntervalPartition - This class builds and holds an "interval partition" for
// BasicBlock 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(AnalysisID AID) : RootInterval(0) { assert(AID == ID); }
-
- const char *getPassName() const { return "Interval Partition Construction"; }
+ IntervalPartition() : RootInterval(0) {}
// run - Calculate the interval partition for this function
virtual bool runOnFunction(Function &F);
// Destructor - Free memory
~IntervalPartition() { destroy(); }
+ // print - Show contents in human readable format...
+ virtual void print(std::ostream &O) const;
+
// getRootInterval() - Return the root interval that contains the starting
// block of the function.
inline Interval *getRootInterval() { return RootInterval; }
// 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.
// getAnalysisUsage - Implement the Pass API
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
- AU.addProvided(ID);
}
+ // Interface to Intervals vector...
+ const std::vector<Interval*> &getIntervals() const { return Intervals; }
+
private:
// destroy - Reset state back to before function was analyzed
void destroy();
// 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