[libcxx-commits] [PATCH] D138667: [libc++abi][LIT][AIX] Use Vector instructions available on Power7 in vec_reg_restore.pass.cpp

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libc++abi LIT test case `vec_reg_restore.pass.cpp` for AIX uses instructions `mtvsrd` and `mfvsrd` that are only available on Power8 CPU and higher, and therefore, fails on Power7 which is supported by the current AIX Clang. This patch replaces `mtvsrd`/`mfvsrd` with `lxvd2x`/`stxvd2x` that are available on Power7. Because `lxvd2x`/`stxvd2x` loads into or stores from a vector register through a memory location, a buffer is used.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D138667

Files:
  libcxxabi/test/vendor/ibm/vec_reg_restore.pass.cpp

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