[llvm-commits] [llvm] r75308 - in /llvm/trunk: include/llvm/CodeGen/ValueTypes.h include/llvm/CodeGen/ValueTypes.td lib/VMCore/ValueTypes.cpp utils/TableGen/CodeGenTarget.cpp

[Duncan Sands]

Hi Bob,

> +      v24i8          =  18,   // 24 x i8
> +      v32i8          =  19,   // 32 x i8
> +      v48i8          =  20,   // 48 x i8

type legalization could be taught to exploit this by
(for example) splitting a v96i8 into two v48i8, or
by widening v20i8 to v24i8.  Currently it doesn't do
this - should it be taught to do it?  Also, if you
*don't* want this to happen then that might cause
problems later if some platform has a native type such
as v3i8 where they do want the type exploited for
splitting and widening.  Then there would need to be
some kind of mechanism for telling the type legalizer
which types are really usable and which ones are fake.

Ciao,

Duncan.