[PATCH] D146407: [AArch64] Combine fadd into fcmla

Mon Mar 20 01:23:27 PDT 2023

dmgreen created this revision.
dmgreen added reviewers: NickGuy, samtebbs, labrinea, SjoerdMeijer.
Herald added subscribers: hiraditya, kristof.beyls.
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dmgreen requested review of this revision.
Herald added a project: LLVM.

This adds a target combine for `fadd(a, vcmla(b, c, d)) -> vcmla(fadd(a, b), b, c)`, pushing the fadd into the operands of the fcmla, which can help simplify away some additions.

https://reviews.llvm.org/D146407

Files:
  llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
  llvm/test/CodeGen/AArch64/neon-vcmla.ll

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