/usr/include/llvm-3.4/llvm/Analysis/LazyValueInfo.h is in llvm-3.4-dev 1:3.4-1ubuntu3.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | //===- LazyValueInfo.h - Value constraint analysis --------------*- C++ -*-===//
//
// 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 lazy computation of value constraint
// information.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_ANALYSIS_LAZYVALUEINFO_H
#define LLVM_ANALYSIS_LAZYVALUEINFO_H
#include "llvm/Pass.h"
namespace llvm {
class Constant;
class DataLayout;
class TargetLibraryInfo;
class Value;
/// LazyValueInfo - This pass computes, caches, and vends lazy value constraint
/// information.
class LazyValueInfo : public FunctionPass {
class DataLayout *TD;
class TargetLibraryInfo *TLI;
void *PImpl;
LazyValueInfo(const LazyValueInfo&) LLVM_DELETED_FUNCTION;
void operator=(const LazyValueInfo&) LLVM_DELETED_FUNCTION;
public:
static char ID;
LazyValueInfo() : FunctionPass(ID), PImpl(0) {
initializeLazyValueInfoPass(*PassRegistry::getPassRegistry());
}
~LazyValueInfo() { assert(PImpl == 0 && "releaseMemory not called"); }
/// Tristate - This is used to return true/false/dunno results.
enum Tristate {
Unknown = -1, False = 0, True = 1
};
// Public query interface.
/// getPredicateOnEdge - Determine whether the specified value comparison
/// with a constant is known to be true or false on the specified CFG edge.
/// Pred is a CmpInst predicate.
Tristate getPredicateOnEdge(unsigned Pred, Value *V, Constant *C,
BasicBlock *FromBB, BasicBlock *ToBB);
/// getConstant - Determine whether the specified value is known to be a
/// constant at the end of the specified block. Return null if not.
Constant *getConstant(Value *V, BasicBlock *BB);
/// getConstantOnEdge - Determine whether the specified value is known to be a
/// constant on the specified edge. Return null if not.
Constant *getConstantOnEdge(Value *V, BasicBlock *FromBB, BasicBlock *ToBB);
/// threadEdge - Inform the analysis cache that we have threaded an edge from
/// PredBB to OldSucc to be from PredBB to NewSucc instead.
void threadEdge(BasicBlock *PredBB, BasicBlock *OldSucc, BasicBlock *NewSucc);
/// eraseBlock - Inform the analysis cache that we have erased a block.
void eraseBlock(BasicBlock *BB);
// Implementation boilerplate.
virtual void getAnalysisUsage(AnalysisUsage &AU) const;
virtual void releaseMemory();
virtual bool runOnFunction(Function &F);
};
} // end namespace llvm
#endif
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