/** Is there an instruction r1 = split r2 or r2 = split r1?? */
private static boolean split(OPT_Register r1, OPT_Register r2) {
for (OPT_RegisterOperandEnumeration e = OPT_DefUse.defs(r1); e.hasMoreElements(); ) {
OPT_RegisterOperand def = (OPT_RegisterOperand) e.nextElement();
OPT_Instruction s = def.instruction;
if (s.operator == SPLIT) {
OPT_Operand rhs = Unary.getVal(s);
if (rhs.similar(def)) return true;
}
}
for (OPT_RegisterOperandEnumeration e = OPT_DefUse.defs(r2); e.hasMoreElements(); ) {
OPT_RegisterOperand def = (OPT_RegisterOperand) e.nextElement();
OPT_Instruction s = def.instruction;
if (s.operator == SPLIT) {
OPT_Operand rhs = Unary.getVal(s);
if (rhs.similar(def)) return true;
}
}
return false;
}
