[roll] Roll fuchsia [superproject] Roll llvm-project/libc [libc] Add support for global ctors / dtors for AMDGPU This patch makes the necessary changes to support calling global constructors and destructors on the GPU. The patch in D149340 allows the `lld` linker to create the symbols pointing us to these globals. These should be executed by a single thread, which is more difficult on the GPU because all threads are active. I chose to use an atomic counter to sync every thread on the GPU. This is very slow if you use more than a few thousand threads, but for testing purposes it should be sufficient. Depends on D149340 D149363 Reviewed By: sivachandra Differential Revision: https://reviews.llvm.org/D149398 GitOrigin-RevId: d193b2dca72dd4429db3f0c03e657234d6d794b7 Original-Revision: ec040b7f0382eb47cda869f69d4bca02fc872b25 Roller-URL: https://ci.chromium.org/b/8782468262605328817 CQ-Do-Not-Cancel-Tryjobs: true Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/849023 Original-Revision: 349abecb907dc03134110143b26462adba6bad45 Change-Id: Ib4dd4c9fa77358337e447c307921544e3026382a
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