[PATCH] D132839: Pre-commit tests for PR#56391

[Tetyushkin Ivan via Phabricator via llvm-commits]

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Optimization for using compressed beqz and bnez

If there is pattern

  br_cc val1 constval eq/neq place
  select_cc val1 constval eq/neq trueval falseval

and constval does not fit in compressed imm format(6 bit), but fit in
imm format(12 bit), we can replace by non compress sub and compress
c.beqz/c.bneqz:

  addi val val -constval
  c.beqz val place


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D132839

Files:
  llvm/lib/Target/RISCV/RISCVInstrInfo.td
  llvm/test/CodeGen/RISCV/compress-opt-branch.ll
  llvm/test/CodeGen/RISCV/compress-opt-select.ll

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