[PATCH] D111508: [RISCV] Optimize immediate materialisation with BSETI/BCLRI

[Ben Shi via Phabricator via llvm-commits]

benshi001 updated this revision to Diff 379242.
benshi001 added a comment.

Opitimize immediate materialisation in the following way if profitable:

1. Use BCLRI for upper 32-bit if the lower 32-bit is negative int32.
2. Use BSETI for upper 32-bit if the lower 32-bit is positive int32.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D111508/new/

https://reviews.llvm.org/D111508

Files:
  llvm/lib/Target/RISCV/MCTargetDesc/RISCVMatInt.cpp
  llvm/test/CodeGen/RISCV/imm.ll
  llvm/test/MC/RISCV/rv64zbs-aliases-valid.s

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