LLVM's new pass manager has been in the works for several years and has better optimization (sometimes much better) than the legacy pass manager. I think it's in good enough shape for us to try at this point.
While we only really need the new pass manager for shippable builds, as a general principle I'd like to use it as much as possible, to help catch bugs for upstream. Therefore this patch enables the new pass manager by default for all clang builds, with the only exceptions being compilers older than version 9, and xcode clang where we can't trust the version number. There isn't a specific problem with older versions; I just don't want to sign up for the support cost of debugging people's local builds that may be fixed already.
I don't expect it to be necessary, but just in case, an opt-out is available via `ac_add_options --disable-new-pass-manager`.
Differential Revision: https://phabricator.services.mozilla.com/D66109
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extra : rebase_source : 91df800146700e4958b8e645ebbd3cf7b11a2f1e
extra : source : 2f5aba2e2c099a1df26e3444ccec2be0b4ff4613
LLVM's new pass manager has been in the works for several years and has better optimization (sometimes much better) than the legacy pass manager. I think it's in good enough shape for us to try at this point.
While we only really need the new pass manager for shippable builds, as a general principle I'd like to use it as much as possible, to help catch bugs for upstream. Therefore this patch enables the new pass manager by default for all clang builds, with the only exceptions being compilers older than version 9, and xcode clang where we can't trust the version number. There isn't a specific problem with older versions; I just don't want to sign up for the support cost of debugging people's local builds that may be fixed already.
I don't expect it to be necessary, but just in case, an opt-out is available via `ac_add_options --disable-new-pass-manager`.
Differential Revision: https://phabricator.services.mozilla.com/D66109
--HG--
extra : moz-landing-system : lando
Dictionary iteration under Python 3 is in an inherently unpredictable order, and while we try to keep DEFINES ordered through the use of OrderedDicts, if at any point we populate DEFINES directly or indirectly while iterating through the contents of a non-ordered dictionary, the order of the DEFINES (and therefore the contents of the output Makefile) will be nondeterministic as well. This patch makes a number of changes to ensure that we only ever populate DEFINES in a deterministic fashion. (Note that in Python 3.7 and later, the built-in dict class actually has deterministic ordering, so these changes are technically only necessary until our minimum Python version becomes 3.7.)
Differential Revision: https://phabricator.services.mozilla.com/D66089
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extra : moz-landing-system : lando
Note: while we can use time.monotonic in fetch-content, we can't in
mach artifact toolchain yet because it's still python2.
Differential Revision: https://phabricator.services.mozilla.com/D65690
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extra : moz-landing-system : lando
This was cargo culted from the autoconf equivalent, and while it makes a
command that does "$(PROG) foo" work because it becomes ": foo", that
may or may not actually be a desirable outcome.
OTOH, we do have some places where there are some "ifdef PROG" that are
just plain wrong when PROG is always actually set.
One place I do know that does check if the value is not ":" is for
OBJCOPY, which is still set from autoconf.
All in all, looking at all the check_prog(allow_missing=True) we have in
python configure, it doesn't seem anything is checking for ":", and that
doesn't seem like the right status quo.
Differential Revision: https://phabricator.services.mozilla.com/D65276
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extra : moz-landing-system : lando
On Linux and Mac, this makes `dmd.py` *much* faster when it is first run on a
DMD data file.
On Windows, this makes DMD actually usable locally. Previously the stacks
weren't fixed and so were rubbish.
Differential Revision: https://phabricator.services.mozilla.com/D57271
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extra : moz-landing-system : lando
Major version number bump for both mozlog and mozcrash + requirements update.
This is very much like the previous mozlog major bump - see bug 1591384.
This patch does not update testing/web-platform/tests/tools/wptrunner/requirements.txt;
I expect that will be automatically updated by the pyup.io bot once mozlog is re-released.
Differential Revision: https://phabricator.services.mozilla.com/D65135
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extra : moz-landing-system : lando
The preprocessor adds line markers in preprocessed files with line
numbers and file they came from. Bug 1528892 changed those markers
to be independent of the topobjdir and topsrcdir, by replacing them
with $OBJDIR and $SRCDIR, respectively.
This goes further, making these paths always use forward-slash, and
never backwards-slash, making the preprocessed files identical whether
the build occurred on Windows or Unix. (well, except when building
for different targets for target-specific sections)
Differential Revision: https://phabricator.services.mozilla.com/D64714
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extra : moz-landing-system : lando
