mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-23 15:29:51 +00:00
69c8d9be02
LoopVR::runOnFunction runs. This should accomplish that, but it doesn't. I think that's a PassManager bug, but without a consumer of LoopVR in the tree, I can't give steps to reproduce. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52886 91177308-0d34-0410-b5e6-96231b3b80d8
91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
//===- LoopVR.cpp - Value Range analysis driven by loop information -------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the interface for the loop-driven value range pass.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_ANALYSIS_LOOPVR_H
|
|
#define LLVM_ANALYSIS_LOOPVR_H
|
|
|
|
#include "llvm/Pass.h"
|
|
#include "llvm/Analysis/ScalarEvolution.h"
|
|
#include "llvm/Support/ConstantRange.h"
|
|
#include <iosfwd>
|
|
#include <map>
|
|
|
|
namespace llvm {
|
|
|
|
/// LoopVR - This class maintains a mapping of Values to ConstantRanges.
|
|
/// There are interfaces to look up and update ranges by value, and for
|
|
/// accessing all values with range information.
|
|
///
|
|
class LoopVR : public FunctionPass {
|
|
public:
|
|
static char ID; // Class identification, replacement for typeinfo
|
|
|
|
LoopVR() : FunctionPass(intptr_t(&ID)) {}
|
|
|
|
bool runOnFunction(Function &F);
|
|
virtual void print(std::ostream &os, const Module *) const;
|
|
void releaseMemory();
|
|
|
|
void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.addRequiredTransitive<LoopInfo>();
|
|
AU.addRequiredTransitive<ScalarEvolution>();
|
|
AU.setPreservesAll();
|
|
}
|
|
|
|
//===---------------------------------------------------------------------
|
|
// Methods that are used to look up and update particular values.
|
|
|
|
/// get - return the ConstantRange for a given Value of IntegerType.
|
|
ConstantRange get(Value *V);
|
|
|
|
/// remove - remove a value from this analysis.
|
|
void remove(Value *V);
|
|
|
|
/// narrow - improve our unterstanding of a Value by pointing out that it
|
|
/// must fall within ConstantRange. To replace a range, remove it first.
|
|
void narrow(Value *V, const ConstantRange &CR);
|
|
|
|
//===---------------------------------------------------------------------
|
|
// Methods that are used to iterate across all values with information.
|
|
|
|
/// size - returns the number of Values with information
|
|
unsigned size() const { return Map.size(); }
|
|
|
|
typedef std::map<Value *, ConstantRange *>::iterator iterator;
|
|
|
|
/// begin - return an iterator to the first Value, ConstantRange pair
|
|
iterator begin() { return Map.begin(); }
|
|
|
|
/// end - return an iterator one past the last Value, ConstantRange pair
|
|
iterator end() { return Map.end(); }
|
|
|
|
/// getValue - return the Value referenced by an iterator
|
|
Value *getValue(iterator I) { return I->first; }
|
|
|
|
/// getConstantRange - return the ConstantRange referenced by an iterator
|
|
ConstantRange getConstantRange(iterator I) { return *I->second; }
|
|
|
|
private:
|
|
ConstantRange compute(Value *V);
|
|
|
|
ConstantRange getRange(SCEVHandle S, Loop *L, ScalarEvolution &SE);
|
|
|
|
ConstantRange getRange(SCEVHandle S, SCEVHandle T, ScalarEvolution &SE);
|
|
|
|
std::map<Value *, ConstantRange *> Map;
|
|
};
|
|
|
|
} // end llvm namespace
|
|
|
|
#endif
|