[all-commits] [llvm/llvm-project] 903f6f: [RISCV] Prune dead LI in vsetvli coalescing with t...

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 903f6fceb86e68b0dbc11b13f808fc00a471e595
      https://github.com/llvm/llvm-project/commit/903f6fceb86e68b0dbc11b13f808fc00a471e595
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2024-07-15 (Mon, 15 Jul 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVInsertVSETVLI.cpp
    M llvm/test/CodeGen/RISCV/rvv/vsetvli-insert.mir

  Log Message:
  -----------
  [RISCV] Prune dead LI in vsetvli coalescing with trivially dead vsetvli (#98647)

This is a follow up to ff8a03a7. On the review for that, I'd suggested a
stylistic rework, but after discussion we decided to move forward with
the fix as it was. This change is a small part of that suggested rework.
Once I sat down and wrote the code, I think I've convinced myself of an
entirely different approach (tbd), but for the moment, let's use a
lambda to share code so that we can pickup a missed optimization, and
reduce some duplication.

---------

Co-authored-by: Luke Lau <luke_lau at icloud.com>



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