[PATCH] [AArch64] Prefer DUP/MOV ("CPY") to INS for vector_extract.

Ahmed Bougacha ahmed.bougacha at gmail.com
Fri Jan 30 15:51:55 PST 2015


Hi jmolloy, t.p.northover,

This avoids a partial dependency on the previous content of the upper lanes of the destination vector.

http://reviews.llvm.org/D7307

Files:
  lib/Target/AArch64/AArch64InstrInfo.td
  test/CodeGen/AArch64/arm64-fixed-point-scalar-cvt-dagcombine.ll
  test/CodeGen/AArch64/arm64-neon-copy.ll
  test/CodeGen/AArch64/fp16-v8-instructions.ll
  test/CodeGen/AArch64/neon-scalar-copy.ll

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