[PATCH] D101130: [PowerPC] Provide XL-compatible builtins in altivec.h

[Nemanja Ivanovic via Phabricator via cfe-commits]

nemanjai created this revision.
nemanjai added reviewers: cebowleratibm, hubert.reinterpretcast, bmahjour, PowerPC.
Herald added subscribers: shchenz, kbarton.
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There are some interfaces in altivec.h that are not compatible between Clang and XL (although Clang is compatible with GCC). Currently, we have found 3 but there may be others.

Clang/GCC signatures:

  vector double vec_ctf(vector signed long long)
  vector double vec_ctf(vector unsigned long long)
  vector signed long long vec_cts(vector double)
  vector unsigned long long vec_ctu(vector double)

XL signatures:

  vector float vec_ctf(vector signed long long)
  vector float vec_ctf(vector unsigned long long)
  vector signed int vec_cts(vector double)
  vector unsigned int vec_ctu(vector double)

This patch provides the XL behaviour under the `__XL_COMPAT_ALTIVEC__` macro for users that rely on XL behaviour.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D101130

Files:
  clang/lib/Headers/altivec.h
  clang/test/CodeGen/builtins-ppc-xlcompat.c

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