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//== PsuedoConstantAnalysis.h - Find Psuedo-constants in the AST -*- C++ -*-==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file tracks the usage of variables in a Decl body to see if they are
// never written to, implying that they constant. This is useful in static
// analysis to see if a developer might have intended a variable to be const.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_ANALYSIS_PSUEDOCONSTANTANALYSIS
#define LLVM_CLANG_ANALYSIS_PSUEDOCONSTANTANALYSIS
#include "clang/AST/Stmt.h"
// The number of ValueDecls we want to keep track of by default (per-function)
#define VALUEDECL_SET_SIZE 256
namespace clang {
class PsuedoConstantAnalysis {
public:
PsuedoConstantAnalysis(const Stmt *DeclBody) :
DeclBody(DeclBody), Analyzed(false) {}
bool isPsuedoConstant(const ValueDecl *VD);
private:
void RunAnalysis();
// for storing the result of analyzed ValueDecls
llvm::SmallPtrSet<const ValueDecl*, VALUEDECL_SET_SIZE> NonConstants;
const Stmt *DeclBody;
bool Analyzed;
};
}
#endif
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