[PATCH] D126392: [RISCV] Use two ADDIs to do some stack pointer adjustments.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: asb, luismarques, reames, kito-cheng, khchen.
Herald added subscribers: sunshaoce, VincentWu, luke957, StephenFan, vkmr, frasercrmck, evandro, apazos, sameer.abuasal, s.egerton, Jim, benna, psnobl, jocewei, PkmX, the_o, brucehoult, MartinMosbeck, rogfer01, edward-jones, zzheng, jrtc27, shiva0217, niosHD, sabuasal, simoncook, johnrusso, rbar, hiraditya, arichardson.
Herald added a project: All.
craig.topper requested review of this revision.
Herald added subscribers: pcwang-thead, eopXD, MaskRay.
Herald added a project: LLVM.

If the adjustment doesn't fit in 12 bits, try to break it into
two 12 bit values before falling back to movImm+add/sub.

This is based on a similar idea from isel.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D126392

Files:
  llvm/lib/Target/RISCV/RISCVFrameLowering.cpp
  llvm/test/CodeGen/RISCV/rvv/emergency-slot.mir
  llvm/test/CodeGen/RISCV/rvv/large-rvv-stack-size.mir
  llvm/test/CodeGen/RISCV/stack-realignment.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D126392.432033.patch
Type: text/x-patch
Size: 4411 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20220525/5110067c/attachment.bin>