[PATCH] D55992: [ARM] Add missing patterns for DSP muls

[Sam Parker via Phabricator via llvm-commits]

samparker created this revision.
samparker added reviewers: SjoerdMeijer, efriedma, t.p.northover.
Herald added subscribers: kristof.beyls, javed.absar.

Using a PatLeaf for sext_16_node allowed matching smulbb and smlabb instructions once the operands had been sign extended. But we also need to use sext_inreg operands allow with sext_16_node to catch a few more cases that enable use to remove the unnecessary sxth.


https://reviews.llvm.org/D55992

Files:
  lib/Target/ARM/ARMInstrInfo.td
  lib/Target/ARM/ARMInstrThumb2.td
  test/CodeGen/ARM/smul.ll

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