[cfe-commits] [PATCH] AltiVec vector support - stage 1

[John Thompson]

Here's a stab a the first stage of adding AltiVec vector support, supporting
the AltiVec types __vector, vector, __pixel, pixel, and bool.  I've also
enclosed a couple of tests for it for the test/Parser directory.

Some of it might be iffy, but I hope you can help me get it into shape with
your feedback.

I added a couple of flags to the DeclSpec class to help me know when the
types are used, TypeAltiVecVector and TypeAltiVecPixel.  The AltiVec
standard doesn't say much about pixel, other than it is used as "__vector
__pixel", and that it represents 8 unsigned shorts.  Therefore, instead of
making a new TST, I made it more like an alias via the TypeAltiVecPixel
flag.

I also added two corresponding flags to the VectorType class (and the
getVectorType function).  Currently, these mainly just help with printing,
but maybe there will be a need to distinguish down the road.  This is kind
of an iffy part, because there were a couple of places where I don't know if
the vector involved is an AltiVec vector, and the flags are used in the type
look up.

Per the previous conversation, I made __vector and __pixel true keywords if
-faltivec is used, and vector and pixel are context-sensitive keywords.  The
AltiVec standard also specifies that bool is a keyword in C, so I diddled
the token flags a bit for that too.

I put the Token patching code in inline functions, so I hope the performance
impact is not too bad.
There's probably some holes in the testing, i.e. sizeof.  But, because I'm
piggy-backing on the existing vectors, I'm hoping most things will still
just work.

I'm not sure what the next stage should be, the built-in functions?

Thanks.

-John

-- 
John Thompson
John.Thompson.JTSoftware at gmail.com
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