[PATCH] D11569: [AArch64] Favor extended reg patterns for sub

[Geoff Berry]

gberry created this revision.
gberry added reviewers: jmolloy, t.p.northover.
gberry added subscribers: llvm-commits, mcrosier.
Herald added subscribers: rengolin, aemerson.

Favor the extended reg patterns over the shifted reg patterns that match
only the operand shift and not the full sign/zero extend and shift.

http://reviews.llvm.org/D11569

Files:
  lib/Target/AArch64/AArch64InstrInfo.td
  test/CodeGen/AArch64/addsub_ext.ll

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