[all-commits] [llvm/llvm-project] e42fdc: [RISCV] Match widening fp instructions with same f...

[Luke Lau via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e42fdcb41fdcfe7bf302b40f20afb4e9cda5602d
      https://github.com/llvm/llvm-project/commit/e42fdcb41fdcfe7bf302b40f20afb4e9cda5602d
  Author: Luke Lau <luke at igalia.com>
  Date:   2025-02-11 (Tue, 11 Feb 2025)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVInstrInfoVSDPatterns.td
    M llvm/lib/Target/RISCV/RISCVInstrInfoVVLPatterns.td
    M llvm/test/CodeGen/RISCV/rvv/vfwadd-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/vfwmacc-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/vfwmul-sdnode.ll
    M llvm/test/CodeGen/RISCV/rvv/vfwsub-sdnode.ll

  Log Message:
  -----------
  [RISCV] Match widening fp instructions with same fpext used in multiple operands (#125803)

Because the fpext has a single use constraint on it we can't match cases
where it's used for both operands.

Introduce a new PatFrag that allows multiple uses on a single user and
use it for the binary patterns, and some ternary patterns.

(For some of the ternary patterns there is a fneg that counts as a
separate user, we still need to handle these)



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