[PATCH] Disable loop unrolling in loop vectorization pass when VF is 1 on x86

[Wei Mi]

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D9515

Files:
  llvm/trunk/include/llvm/Analysis/TargetTransformInfo.h
  llvm/trunk/include/llvm/Analysis/TargetTransformInfoImpl.h
  llvm/trunk/include/llvm/CodeGen/BasicTTIImpl.h
  llvm/trunk/lib/Analysis/TargetTransformInfo.cpp
  llvm/trunk/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
  llvm/trunk/lib/Target/AArch64/AArch64TargetTransformInfo.h
  llvm/trunk/lib/Target/ARM/ARMTargetTransformInfo.h
  llvm/trunk/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
  llvm/trunk/lib/Target/PowerPC/PPCTargetTransformInfo.h
  llvm/trunk/lib/Target/R600/AMDGPUTargetTransformInfo.cpp
  llvm/trunk/lib/Target/R600/AMDGPUTargetTransformInfo.h
  llvm/trunk/lib/Target/X86/X86TargetTransformInfo.cpp
  llvm/trunk/lib/Target/X86/X86TargetTransformInfo.h
  llvm/trunk/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/trunk/test/Transforms/LoopVectorize/X86/unroll-small-loops.ll
  llvm/trunk/test/Transforms/LoopVectorize/unroll.ll

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