compareAndBranch

fun compareAndBranch(    generator: L2Generator,     int1Reg: L2ReadIntOperand,     int2Reg: L2ReadIntOperand,     ifTrue: L2PcOperand,     ifFalse: L2PcOperand)

Compare the int register values and branch to one target or the other. Restrict the possible values as much as possible along both branches. Convert the branch to an unconditional jump if possible.