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
