void emit_classcast_check(codegendata *cd, instruction *iptr, s4 condition, s4 reg, s4 s1);
void emit_nullpointer_check(codegendata *cd, instruction *iptr, s4 reg);
void emit_exception_check(codegendata *cd, instruction *iptr);
void emit_classcast_check(codegendata *cd, instruction *iptr, s4 condition, s4 reg, s4 s1);
void emit_nullpointer_check(codegendata *cd, instruction *iptr, s4 reg);
void emit_exception_check(codegendata *cd, instruction *iptr);