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
This splits OptTable's "Flags" field into "Flags" and "Visibility", updates the places where we instantiate Option tables, and adds variants of the OptTable APIs that use Visibility mask instead of Include/Exclude flags. We need to do this to clean up a bunch of complexity in the clang driver's option handling - there's a whole slew of flags like CoreOption, NoDriverOption, and FlangOnlyOption there today to try to handle all of the permutations of flags that the various drivers need, but it really doesn't scale well, as can be seen by things like the somewhat recently introduced CLDXCOption. Instead, we'll provide an additive model for visibility that's separate from the other flags. For things like "HelpHidden", which is used as a "subtractive" modifier for option visibility, we leave that in "Flags" and handle it as a special case. Note that we don't actually update the users of the Include/Exclude APIs here or change the flags that exist in clang at all - that will come in a follow up that refactors clang's Options.td to use the increased flexibility this change allows. Differential Revision: https://reviews.llvm.org/D157149
LLVM Linker (lld)
This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.
lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.
Benchmarking
In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.
It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz
The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f
.