A period is a contiguous sequence of phase ids in some run.
A period is a contiguous sequence of phase ids in some run. It is coded as follows:
sign, always 0 1 bit runid 19 bits last phase id: 6 bits #phases before last: 6 bits
// Dmitry: sign == 0 isn't actually always true, in some cases phaseId == -1 is used for shifts, that easily creates code < 0
An ordinal number for phases.
An ordinal number for phases. First phase has number 1.
An ordinal number for compiler runs.
An ordinal number for compiler runs. First run has number 1.
The number of bits needed to encode a phase identifier.