[all-commits] [llvm/llvm-project] 6ab792: [ARM] Simplify extract of VMOVDRR

[David Green via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6ab792b68d5779e1668a2bd6ecd0a52c91b56387
      https://github.com/llvm/llvm-project/commit/6ab792b68d5779e1668a2bd6ecd0a52c91b56387
  Author: David Green <david.green at arm.com>
  Date:   2021-02-01 (Mon, 01 Feb 2021)

  Changed paths:
    M llvm/lib/Target/ARM/ARMISelLowering.cpp
    M llvm/test/CodeGen/Thumb2/mve-soft-float-abi.ll

  Log Message:
  -----------
  [ARM] Simplify extract of VMOVDRR

Under SoftFP calling conventions, we can be left with
extract(bitcast(BUILD_VECTOR(VMOVDRR(a, b), ..))) patterns that can
simplify to a or b, depending on the extract lane.

Differential Revision: https://reviews.llvm.org/D94990