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

[Qiu Chaofan via Phabricator via cfe-commits]

qiucf added a comment.

In D158066#4601785 <https://reviews.llvm.org/D158066#4601785>, @nemanjai wrote:

> It should be perfectly fine to provide pre-defined macros for these to match GCC on PowerPC. The reason we went with the macro solution is to avoid polluting the builtins namespace for other targets.
>
> Also, please add some C++ tests for these PPC wrappers so that we aren't surprised again when someone tries to use these in their C++ code.

It seems these macros do not always work for all PowerPC targets:

  // -target=ppc64le -mcpu=power9 do not work
  // -target=ppc64le-unknown-linux-gnu -mcpu=power9 work
  long calldarn(void) { return __darn(); }


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  https://reviews.llvm.org/D158066/new/

https://reviews.llvm.org/D158066