[PATCH] Add a "probe-stack" attribute

[John Kåre Alsaker]

Used the right scale value on the OR instruction. Change the relocation to the __probestack call on non-Windows x86-64 platforms.

http://reviews.llvm.org/D4717

Files:
  include/llvm/CodeGen/MachineFunction.h
  lib/CodeGen/MachineFunction.cpp
  lib/Target/ARM/ARMFrameLowering.cpp
  lib/Target/X86/X86FrameLowering.cpp
  lib/Target/X86/X86ISelLowering.cpp
  lib/Transforms/IPO/Inliner.cpp
  test/CodeGen/X86/mingw-alloca.ll
  test/CodeGen/X86/pr17631.ll
  test/CodeGen/X86/stack-probes.ll
  test/CodeGen/X86/win64_alloca_dynalloca.ll
  test/CodeGen/X86/win64_eh.ll
  test/CodeGen/X86/win_chkstk.ll
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