[PATCH] D142359: [TTI][AArch64] Cost model vector INS instructions

[Sjoerd Meijer via Phabricator via llvm-commits]

SjoerdMeijer created this revision.
SjoerdMeijer added reviewers: dmgreen, david-arm.
Herald added subscribers: hiraditya, kristof.beyls.
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This makes the "ASIMD insert, element to element" instruction, INS, cheaper for the N1, N2, V1, V2 cores.  The software optimisation guides specify a latency of 2 for this instructions, which makes them pretty cheap.  I see a 2.5% perf uplift for x264 with this on the V1.


https://reviews.llvm.org/D142359

Files:
  llvm/lib/Target/AArch64/AArch64Subtarget.cpp
  llvm/test/Analysis/CostModel/AArch64/insert-extract.ll

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