[LLVMdev] More Qs about llvm IR to access struct fields

[Krzysztof Parzyszek]

On 4/17/2014 2:41 PM, Rodney M. Bates wrote:
>
> Question 1:
> Does this choice affect the optimization possibilities?

Depends on how advanced the alias analysis is these days (it is mostly 
the alias analysis that could suffer).  I haven't looked into the AA 
code much, but from what I remember, it could be affected by how the 
data addresses are constructed.  Look into the TBAA metadata and whether 
there is any expectation of correlation between the GEP structure and 
the TBAA information. (Sorry, I don't have exact answers off the top of 
my head.)

-Krzysztof


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