I tried that before responding and I found that the stdlib build time to be unchanged (still about 15 minutes).
> On Aug 6, 2017, at 17:25, Michael Gottesman <mgottes...@apple.com> wrote: > > You need an additional flag for the stdlib. —debug-swift-stdlib > > Sent from my iPhone > >> On Aug 6, 2017, at 1:50 PM, David Zarzycki <zarzy...@icloud.com> wrote: >> >> >>> On Aug 6, 2017, at 16:16, Michael Gottesman <mgottes...@apple.com> wrote: >>> >>> >>>> On Aug 6, 2017, at 11:11 AM, David Zarzycki via swift-dev >>>> <swift-dev@swift.org> wrote: >>>> >>>> Hello, >>>> >>>> Unless I’m missing a build-script flag, it seems to me that compiling the >>>> Swift stdlib with the unoptimized debug swift compiler takes about 15 >>>> minutes on a fast machine. >>> >>> I am assuming that you mean a debug swift compiler building an optimized >>> stdlib? >> >> Hi Michael, >> >> I’m building the debug swift compiler via ./utils/build-script -r >> —debug-swift. I assume, perhaps wrongly, that implies a debug stdlib. >> >>> >>>> Other than forcing the type checker to be optimized, what if any tricks >>>> can I use to building the stdlib faster with the debug compiler? Is there >>>> a way to tell Clang to enable the inliner and only the inliner during -O0 >>>> builds? I have an anecdotal experiment[1] that suggests that this would >>>> yield appreciably faster Swift stdlib builds with the debug compiler (and >>>> selfishly speaking, I can tolerate the minor impact on debugging that >>>> inlining does to otherwise unoptimized code). >>> >>> Are building LLVM in release + Swift in debug? I.e.: >>> >>> —release-debuginfo --debug-swift --force-optimized-typechecker >> >> Yes, with the exception that I cannot use —force-optimized-typechecker >> because I’m hacking on the type checker. Otherwise, this is what I’m doing >> to make debug builds go as fast as possible: >> >> ./utils/build-script \ >> --llvm-targets-to-build X86 \ >> --skip-ios --skip-tvos --skip-watchos \ >> --skip-build-benchmarks true \ >> --build-swift-static-stdlib false \ >> --build-swift-static-sdk-overlay false \ >> --build-swift-dynamic-sdk-overlay false \ >> --build-swift-stdlib-unittest-extra false \ >> --extra-cmake-options \\-DCMAKE_CXX_FLAGS=-Werror=switch \ >> -r \ >> --debug-swift \ >> "$@" >> >> >>> >>>> >>>> Thanks! >>>> >>>> Dave >>>> >>>> [1] – If one force inlines LLVM’s casting logic and associated callbacks >>>> (like classof() and getKind()), then the Swift stdlib builds 18% faster on >>>> my machine with the debug Swift compiler. One can imagine how much faster >>>> the whole stdlib would compile if all trivial functions were inlined >>>> automatically. >>>> _______________________________________________ >>>> 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
