Fix function declaration types to FunctionCallee

hpvm/include/GenVISC/GenVISC.h

@@ -27,9 +27,9 @@ struct GenVISC : public ModulePass {
 private:
   // Member variables
   Module* M;
-  Constant* llvm_visc_initializeTimerSet;
-  Constant* llvm_visc_switchToTimer;
-  Constant* llvm_visc_printTimerSet;
+  FunctionCalleee llvm_visc_initializeTimerSet;
+  FunctionCalleee llvm_visc_switchToTimer;
+  FunctionCalleee llvm_visc_printTimerSet;
 
   GlobalVariable* TimerSet;