1 #ifndef VARIABLE_REFS_H 2 #define VARIABLE_REFS_H 3 4 #include <pass.h> 5 6 using namespace llvm; 7 8 namespace llvm { 9 10 class VariableRefs { 11 public: 12 VariableRefs(); 13 14 bool isUnnecessaryInstruction(Instruction* inst) const; 15 Instruction* getInstruction() const; 16 bool isInstructionInEntryBlock() const; 17 18 void addInstruction(Instruction* inst); 19 void clear(); 20 21 private: 22 Instruction* instruction; 23 bool instructionInEntryBlock; 24 25 void setFunctionEntryInstruction(Function* function); 26 }; 27 28 } 29 30 #endif 31