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Summary

  1. [PowerPC][Altivec] Fix offsets for vec_xl and vec_xst (details)
Commit e0407f54965318247c8fece2dfa5c9023acf0973 by nemanjai
[PowerPC][Altivec] Fix offsets for vec_xl and vec_xst
As we currently have it implemented in altivec.h, the offsets for these
two intrinsics are element offsets. The documentation in the ABI (as
well as the implementation in both XL and GCC) states that these should
be byte offsets.
Differential revision: https://reviews.llvm.org/D63636
The file was addedclang/test/CodeGen/builtins-ppc-xl-xst.c
The file was modifiedclang/lib/Headers/altivec.h