[PATCH] D123267: [RISCV] Post-RA merge base offset pass

[Luís Marques via Phabricator via llvm-commits]

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This is a stopgap solution until something more along the lines of D123264 <https://reviews.llvm.org/D123264> and D123265 <https://reviews.llvm.org/D123265> gets accepted. It conservatively does the folding of the low part of LLA addresses into the offset of load instructions. In my benchmarks it worked better than I was expecting, so maybe this is worth considering if the other patches get stalled?


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D123267

Files:
  llvm/lib/Target/RISCV/RISCV.h
  llvm/lib/Target/RISCV/RISCVMergeBaseOffset.cpp
  llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
  llvm/test/CodeGen/RISCV/O3-pipeline.ll
  llvm/test/CodeGen/RISCV/codemodel-lowering.ll

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