[PATCH] D40855: [PowerPC] LSR tunings for PowerPC

[Brad Nemanich via Phabricator via llvm-commits]

bnemanich created this revision.
Herald added subscribers: kbarton, nemanjai.

The purpose of this patch is to make LSR generate better code for Power. This is done by overriding isLSRCostLess to check instruction counts like X86 does. This was shown to show a 0.10% improvement in the geometric mean of SPEC 2006 tests on Power systems.


https://reviews.llvm.org/D40855

Files:
  lib/Target/PowerPC/PPCTargetTransformInfo.cpp
  lib/Target/PowerPC/PPCTargetTransformInfo.h
  test/Transforms/LoopStrengthReduce/PowerPC/lsr-insns-3.ll

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