Clang-related changes for http://reviews.llvm.org/D7959
Add builtins for the following 64-bit vector integer arithmetic instructions added in POWER8:
vmulesw
vmulosw
vmuleuw
vmulouw
vmuluwm
vmaxsd
vmaxud
vminsd
vminud
vcmpequd
vcmpequd.
vcmpgtsd
vcmpgtsd.
vcmpgtud
vcmpgtud.
vrld
vsld
vsrd
vsrad
All builtins are added in altivec.h, and guarded with the POWER8_VECTOR macro.
Is this the underlying builtin for the removed vec_muluwm? Should this be removed as well if so? The diff does not show any calls for this (i.e. in altivec.h or the test case).