[PATCH] D106757: [PowerPC] Implement partial vector ld/st builtins for XL compatibility

[Nemanja Ivanovic via Phabricator via cfe-commits]

nemanjai created this revision.
nemanjai added a reviewer: PowerPC.
Herald added subscribers: shchenz, kbarton.
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XL provides functions `__vec_ldrmb/__vec_strmb` for loading/storing a sequence of 1 to 16 bytes in big endian order, right justified in the vector register (regardless of target endianness).
This is equivalent to `vec_xl_len_r/vec_xst_len_r` which are only available on Power9.

This patch simply uses the Power9 functions when compiled for Power9, but provides a more general implementation for Power8.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106757

Files:
  clang/include/clang/Basic/BuiltinsPPC.def
  clang/lib/CodeGen/CGBuiltin.cpp
  clang/lib/Headers/altivec.h
  clang/lib/Sema/SemaChecking.cpp
  clang/test/CodeGen/builtins-ppc-ld-st-rmb.c
  clang/test/CodeGen/builtins-ppc-xlcompat-pwr8.c
  clang/test/CodeGen/builtins-ppc-xlcompat-vec-error.c

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