> On Jan 13, 2017, at 1:58 PM, Jordan Rose <jordan_r...@apple.com> wrote: > > <disclaimer>For anyone following along, frontend flags are not guaranteed to > be stable (as in, they may be removed in a later version of Swift), nor are > they guaranteed to produce correct or working code. Jiho’s use is exactly the > correct one—to check for a difference of behavior in the Swift compiler > itself—but please do not use these in production code.</disclaimer> > > Jordan
This is swift-dev, not swift-users, so I’m assuming anything goes, even questions about SIL syntax :) > > >> On Jan 13, 2017, at 13:50, Slava Pestov via swift-dev <swift-dev@swift.org> >> wrote: >> >> Hi Jiho, >> >> Some low-level frontend flags are not exposed to the driver. >> >> To pass frontend flags directly via the driver, use -Xfrontend, eg >> >> swiftc -Xfrontend -assume-single-threaded mytest.swift >> >> This is different from -frontend — -frontend skips the driver entirely, >> -Xfrontend runs the driver but passes the next argument to each frontend >> invocation. >> >> Slava >> >>> On Jan 13, 2017, at 1:01 PM, Jiho Choi via swift-dev <swift-dev@swift.org> >>> wrote: >>> >>> Hi, >>> >>> I want to try -assume-single-threaded option to measure the overhead of >>> atomic operations for reference counting. However, it seems that the >>> option works as intended with the frontend but not with the driver. In >>> other words, I tried two commands below, and only the first command >>> replaced atomic operations. >>> >>> swiftc -frontend -emit-sil -assume-single-threaded mytest.swift >>> swiftc -emit-sil -assume-single-threaded mytest.swift >>> >>> Is the option disabled for the driver for some reason? >>> >>> Thanks, >>> Jiho >>> _______________________________________________ >>> swift-dev mailing list >>> swift-dev@swift.org >>> https://lists.swift.org/mailman/listinfo/swift-dev >> >> _______________________________________________ >> swift-dev mailing list >> swift-dev@swift.org >> https://lists.swift.org/mailman/listinfo/swift-dev > _______________________________________________ swift-dev mailing list swift-dev@swift.org https://lists.swift.org/mailman/listinfo/swift-dev
