[all-commits] [llvm/llvm-project] 218bb2: [RISCV] Update performCombineVMergeAndVOps comment...

[Luke Lau via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 218bb21eaa2f3c08ec24de1f5d88f4d5265068bf
      https://github.com/llvm/llvm-project/commit/218bb21eaa2f3c08ec24de1f5d88f4d5265068bf
  Author: Luke Lau <luke at igalia.com>
  Date:   2024-01-24 (Wed, 24 Jan 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp

  Log Message:
  -----------
  [RISCV] Update performCombineVMergeAndVOps comments. NFC (#78472)

The current comment was written whenever we had separate TU/TA variants
for
each pseudo, and hasn't been accurate for a while.
This method has grown rather complicated over time so rather than
enumerate all
the different possible cases now (which must be a lot), this updates the
comment to list the different rules that are required for us to be able
to fold
a vmerge.