Inserts a new key <Key> with value 1. Or increments an existing key by 1. :type key: str :rtype: void

Can't understand

seems we don't need to read this carefully Check if this instruction is a runtime call for value profiling and if it's instrumenting a constant.

Return true if MO is the only remaining reference to its virtual register, and it is guaranteed to be a block-local register.

Return true if MO is the only remaining reference to its virtual register, and it is guaranteed to be a block-local register.

Check if a physreg or any of its aliases are used in this instruction.

Check if a physreg or any of its aliases are used in this instruction.

Mark virtreg as no longer available. mark the corresponding physical register as free

Mark virtreg as no longer available.

p->(q->p)

p->(q->r)

~p->~q -> (p->q)

time: O(mn); space: O(mn)

those markLive stuff

the second step of main process

Mark a physreg as used in this instruction.

Mark a physreg as used in this instruction.

Returns false if \p VirtReg is known to not be live into the current block.

Returns false if \p VirtReg is known to not live out of the current block.

dijstra