[PowerPC]To provide better compatibility with gcc I added the __bool keyword to the Alitivec support in clang. __bool is functionally identical to using bool when declaring vector types. For example:
vector bool char v_bc;
vector __bool char v___bc;
clang already supported vector/__vector and pixel/__pixel but was missing __bool.
http://llvm.org/bugs/show_bug.cgi?id=19220
For reference: https://gcc.gnu.org/onlinedocs/gcc-4.9.2/gcc/PowerPC-AltiVec_002fVSX-Built-in-Functions.html
http://reviews.llvm.org/D6882
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@225664
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