[PATCH] D79635: [RISCV] Split the pseudo instruction splitting pass

[Luís Marques via Phabricator via llvm-commits]

luismarques created this revision.
luismarques added reviewers: asb, lenary.
Herald added subscribers: llvm-commits, evandro, apazos, sameer.abuasal, pzheng, s.egerton, Jim, benna, psnobl, jocewei, PkmX, jfb, rkruppe, the_o, brucehoult, MartinMosbeck, rogfer01, edward-jones, zzheng, MaskRay, jrtc27, shiva0217, kito-cheng, niosHD, sabuasal, simoncook, johnrusso, rbar, hiraditya, mgorny.
Herald added a project: LLVM.

This patch extracts the atomic pseudo-instructions' splitting from `riscv-expand-pseudo` / `RISCVExpandPseudo` into its own pass, `riscv-expand-atomic-pseudo` / `RISCVExpandAtomicPseudo`. This allows for the expansion of atomic operations to continue to happen late (the new pass is added in `addPreEmitPass2`, so those expansions continue to happen in the same place), while the remaining pseudo-instructions can now be expanded earlier and benefit from more optimization passes. The nonatomics pass is now added in `addPreSched2`.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D79635

Files:
  llvm/lib/Target/RISCV/CMakeLists.txt
  llvm/lib/Target/RISCV/RISCV.h
  llvm/lib/Target/RISCV/RISCVExpandAtomicPseudoInsts.cpp
  llvm/lib/Target/RISCV/RISCVExpandPseudoInsts.cpp
  llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
  llvm/test/CodeGen/RISCV/codemodel-lowering.ll

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