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Summary

  1. [PowerPC] Provide vec_cmpne on pre-Power9 architectures in altivec.h (details)
Commit 2d652949be4b772f2c11577621b0ad33052ac844 by nemanja.i.ibm
[PowerPC] Provide vec_cmpne on pre-Power9 architectures in altivec.h

These overloads are listed in appendix A of the ELFv2 ABI specification
without a requirement for ISA 3.0. So these need to be available on
all Altivec-capable architectures. The implementation in altivec.h
erroneously had them guarded for Power9 due to the availability of
the VCMPNE[BHW] instructions. However these need to be implemented
in terms of the VCMPEQ[BHW] instructions on older architectures.

Fixes: https://bugs.llvm.org/show_bug.cgi?id=47423
The file was modifiedclang/test/CodeGen/builtins-ppc-altivec.c (diff)
The file was modifiedclang/lib/Headers/altivec.h (diff)