/** Return true if the instruction sets the register. */ public boolean defs(int register, RegisterSet registers) { int ard = registers.actualRegister(rd); int areg = registers.actualRegister(register); return (areg == ard); }
/** Return true if the instruction can be deleted without changing program semantics. */ public boolean canBeDeleted(RegisterSet registers) { int ard = registers.actualRegister(rd); return (ard == SparcRegisterSet.G0_REG); }
/** Return true if the instruction uses the register. */ public boolean uses(int register, RegisterSet registers) { int ars1 = registers.actualRegister(rs1); int areg = registers.actualRegister(register); return (areg == ars1); }