[PATCH] D140119: [PowerPC][GIsel] Materialize i64 constants.

Thu Dec 15 21:34:58 PST 2022

shchenz added a comment.

hmm, so many duplicated codes, but seems there is no simple way to avoid this.

D139813 <https://reviews.llvm.org/D139813> adds some improvement for i64 materialization in DAG ISel. That should be adopted to GISel too.

This reminds me there was a proposal (https://reviews.llvm.org/D82709#2137837) for PPC target that PPC can materialize the i64 imm after ISEL and in ISEL just lower the i64 imm to a pseudo instruction. So we can avoid the duplication here and also some other remat issue in register allocation. But that may require big effort...

Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D140119/new/

https://reviews.llvm.org/D140119