Merging r245535:

------------------------------------------------------------------------
r245535 | hfinkel | 2015-08-19 20:02:02 -0700 (Wed, 19 Aug 2015) | 6 lines

[PowerPC] Fix value type on XVCMPEQDP for v2f64 comparisons

XVCMPEQDP is used for VSX v2f64 equality comparisons, but the value type needs
to be v2i64 (as that's the corresponding SETCC type).

Fixes PR24225.
------------------------------------------------------------------------

llvm-svn: 245574