[PATCH] D87287: [ARM] Fixup single source mla reductions.

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: simon_tatham, SjoerdMeijer, samparker, efriedma, samtebbs.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls.
Herald added a project: LLVM.
dmgreen requested review of this revision.

This fixes a complication on top of D87276 <https://reviews.llvm.org/D87276>. If we are sext-ing around a mul with the two operands that are the same, instcombine will helpfully convert one of the sext to a zext. Reverse that so that we again generate a reduction.


https://reviews.llvm.org/D87287

Files:
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/test/CodeGen/Thumb2/mve-vecreduce-mla.ll
  llvm/test/CodeGen/Thumb2/mve-vecreduce-mlapred.ll

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