[all-commits] [llvm/llvm-project] 3cfdf2: [RISCV] Handle more (add x, C) -> (sub x, -C) case...

Piotr Fusik via All-commits all-commits at lists.llvm.org
Tue May 13 00:12:46 PDT 2025


  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3cfdf2ccdf71e594226590f07b3fb316c77a36e7
      https://github.com/llvm/llvm-project/commit/3cfdf2ccdf71e594226590f07b3fb316c77a36e7
  Author: Piotr Fusik <p.fusik at samsung.com>
  Date:   2025-05-13 (Tue, 13 May 2025)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelDAGToDAG.cpp
    M llvm/lib/Target/RISCV/RISCVISelDAGToDAG.h
    M llvm/lib/Target/RISCV/RISCVInstrInfoVPseudos.td
    M llvm/lib/Target/RISCV/RISCVInstrInfoVSDPatterns.td
    M llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
    M llvm/test/CodeGen/RISCV/add-imm64-to-sub.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-splat.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-vadd-vp.ll
    M llvm/test/CodeGen/RISCV/rvv/vadd-sdnode.ll

  Log Message:
  -----------
  [RISCV] Handle more (add x, C) -> (sub x, -C) cases (#138705)

This is a follow-up to #137309, adding:
- multi-use of the constant with different adds
- vectors (vadd.vx -> vsub.vx)



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