1 //== PseudoConstantAnalysis.h - Find Pseudo-constants in the AST -*- C++ -*-==// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file tracks the usage of variables in a Decl body to see if they are 11 // never written to, implying that they constant. This is useful in static 12 // analysis to see if a developer might have intended a variable to be const. 13 // 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_CLANG_ANALYSIS_ANALYSES_PSEUDOCONSTANTANALYSIS_H 17 #define LLVM_CLANG_ANALYSIS_ANALYSES_PSEUDOCONSTANTANALYSIS_H 18 19 #include "clang/AST/Stmt.h" 20 21 namespace clang { 22 23 class PseudoConstantAnalysis { 24 public: 25 PseudoConstantAnalysis(const Stmt *DeclBody); 26 ~PseudoConstantAnalysis(); 27 28 bool isPseudoConstant(const VarDecl *VD); 29 bool wasReferenced(const VarDecl *VD); 30 31 private: 32 void RunAnalysis(); 33 inline static const Decl *getDecl(const Expr *E); 34 35 // for storing the result of analyzed ValueDecls 36 void *NonConstantsImpl; 37 void *UsedVarsImpl; 38 39 const Stmt *DeclBody; 40 bool Analyzed; 41 }; 42 43 } 44 45 #endif 46
