Commits

Joe Groff committed 25e370fcce4
Frontend: Pass down -O level in -i mode. '-i' code was always getting emitted at -O2 regardless of the -O flag, which enables the "standard library hack" that pulls in IR for all of swift.swift. For -i optimization is often less important than responsiveness, so allow the optimization level to be specified by a flag and default to -O0 normally. Swift SVN r4518