[PATCH] D129450: [RISCV] Move the custom isel for (add X, imm) into SelectAddrRegImm.

[Craig Topper via Phabricator via llvm-commits]

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This custom isel was used to split the lo12 bits of the imm so that
they could be folded into load/store addresses via a post-isel
peephole.

      

This patch instead splits the immediate during isel and folds the
lo12 removing the need for the post-isel peephole to do anything.

      

After this we'll be able to remove the post-isel peephole.


https://reviews.llvm.org/D129450

Files:
  llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp

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