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d3223
2017 May 04
2
Handling invariant.groups with equality + marking it as experimental
...ation
point of view.
I am also not sure what should be the semantics of the
barrier(constant) - should we constantfold it to constant? I am not
sure if constant pointer
can carry any invariant.group information - I am pretty sure that
*null* and *undef* does not carry it
(https://reviews.llvm.org/D32423).
The third solution I am thinking of is just not to propagate the new
value to every dominated use -
especially to instructions like calls, return or load/store with
invariant.group information.
To validate this idea I need some help from GVN wizzards - would it
break any important optimizatio...