[all-commits] [llvm/llvm-project] 20637e: [RISCV] Sink splatted fpext operands (#125800)

[Luke Lau via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 20637e7fa7649b181333e2b07b0afd1aab37128e
      https://github.com/llvm/llvm-project/commit/20637e7fa7649b181333e2b07b0afd1aab37128e
  Author: Luke Lau <luke at igalia.com>
  Date:   2025-02-05 (Wed, 05 Feb 2025)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
    M llvm/test/CodeGen/RISCV/rvv/sink-splat-operands.ll

  Log Message:
  -----------
  [RISCV] Sink splatted fpext operands (#125800)

We sink splatted operands in codegenprepare to help match .vx/.vf
patterns. This extends it to also splat any fpext so that we can match
widening vfwadd.vf/vfwadd.wf patterns too.

Some instructions don't have .wf forms so there's no benefit to sinking
the fpext. For simplicity this sinks them anyway and lets
earlymachine-licm hoist them back out.



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