[PATCH] D37177: [X86] Don't disable slow INC/DEC if optimizing for size

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.

Just because INC/DEC is a little slow on some processors doesn't mean we shouldn't prefer it when optimizing for size.

This appears to match gcc behavior.


https://reviews.llvm.org/D37177

Files:
  lib/Target/X86/X86ISelLowering.cpp
  lib/Target/X86/X86InstrArithmetic.td
  lib/Target/X86/X86InstrCompiler.td
  lib/Target/X86/X86InstrInfo.td
  test/CodeGen/X86/slow-incdec.ll

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