[PATCH] D85699: PR47099: Split <intrin0.h> out of <intrin.h>.

[Richard Smith - zygoloid via Phabricator via cfe-commits]

rsmith created this revision.
rsmith added reviewers: hans, BillyONeal.
Herald added subscribers: cfe-commits, jfb, mgorny.
Herald added a project: clang.
rsmith requested review of this revision.

This aims to be compatible with Visual C++'s <intrin0.h>, but not
exactly match it. The contents of <intrin0.h> are a subset of <intrin.h>
that provide the parts that the STL needs without pulling in all of
<immintrin.h>. We don't want to hardcode exactly which things are in
<intrin0.h>, as that changes over time depending on the needs of the
STL, so instead include all the MS-specific functions, and none of the
<immintrin.h> functions except for the ones that we know the MS STL
needs -- specifically, _tzcnt_u*.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D85699

Files:
  clang/lib/Headers/CMakeLists.txt
  clang/lib/Headers/bmiintrin.h
  clang/lib/Headers/intrin.h
  clang/lib/Headers/intrin0.h
  clang/test/Headers/ms-intrin0.cpp

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