[PATCH] D158066: [PowerPC] Fix use of FPSCR builtins in smmintrin.h

[Qiu Chaofan via Phabricator via cfe-commits]

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`smmintrin.h` uses `__builtin_mffs`, `__builtin_mffsl`, `__builtin_mtfsf` and `__builtin_set_fpscr_rn`. This patch replaces the uses with `ppc` prefix and implement the missing ones.

This fixes issue 64664.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D158066

Files:
  clang/include/clang/Basic/BuiltinsPPC.def
  clang/lib/CodeGen/CGBuiltin.cpp
  clang/lib/Headers/ppc_wrappers/smmintrin.h
  clang/test/CodeGen/PowerPC/builtins-ppc.c
  clang/test/CodeGen/PowerPC/ppc-smmintrin.c

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