[PATCH] D153791: [MachineInst] Bump NumOperands back up to 24bits

[Jon Roelofs via Phabricator via llvm-commits]

jroelofs created this revision.
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In https://reviews.llvm.org/D149445, it was lowered from 32 to 16bits, which broke an internal project of ours. The relevant code being compiled is a fairly large nested switch that results in a PHI node with 65k+ operands, which can't easily be turned into a table for perf reasons.

      

This change unifies `NumOperands`, `Flags`, and `AsmPrinterFlags` into a packed 7-byte struct, which `CapOperands` can follow as the 8th byte, rounding it up to a nice alignment before the `Info` field.

      

rdar://111217742&109362033


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D153791

Files:
  llvm/include/llvm/CodeGen/MachineInstr.h
  llvm/lib/CodeGen/MachineInstr.cpp

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