[PATCH] D23896: [InstCombine] Try to resubmit the combine of A->B->A BitCast and fix for pr27996

[Guozhi Wei via llvm-commits]

Carrot added a comment.

In https://reviews.llvm.org/D23896#537933, @evstupac wrote:

> Hi,
>
> > InstCombine is supposed to run to fix-point
>
>
> Have you addressed David's comment?
>
> Am I right that current fix-point is when all CI users are memory instructions?


Yes, optimizeBitCastFromPhi only generates new BitCast for load/store instructions, and now it will not work on BitCast used by MemOp only, so it will never work on the BitCast generated by itself.


https://reviews.llvm.org/D23896