[llvm-commits] Patch: mmx truncation and selects

[Mon Ping Wang]

This is a patch that fixes two issues that widening discovered for X86  
and mmx.
- For X86, we don't support SELECT v8i8 and v4i16.  This patch  
implements it the same way that SSE does.
- For X86, we could not codegen truncating a v8i16 to v8i8 (both are  
legal types).  The patch will allow legal code generation that we  
should improve on it later.

Thanks,
-- Mon Ping

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