[LLVMdev] Load value and broadcast in LLVM

[zhi chen]

Is it possible to load a value into a vector register and broadcast it in
LLVM?

For example, for the following address %x

 %x = getelementptr inbounds %struct._Ray* %ray, i32 0, i32 0, i32 0

instead of loading the value at %x into a scalar register %0:
%0 = load double* %x, align 4, !tbaa !0

I want to load it into a <2 x double> vector register %1 and make both of
the two elements in %1 be the value at %x.

I guess one way to do this is to make getelementptr return a <2 x i32>*
address, where the two addresses in <2 X 32> are the same. But I don't know
if it is possible to do this in LLVM.

Any help would be appreciated.

Best,
Zhi
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