[PATCH] [WIP] MSVC FPO debug information

[Jeff Muizelaar]

Hi majnemer,

The basic approach is to add a FPO_INSTRUCTION during X86FrameLowering along
with some information in MachineModuleInfo. WinCodeViewLineTables then looks
for this instruction and pulls out the relevant information and emits the FPO
tables.

http://reviews.llvm.org/D10432

Files:
  include/llvm/CodeGen/MachineInstr.h
  include/llvm/CodeGen/MachineModuleInfo.h
  include/llvm/MC/MCStreamer.h
  include/llvm/Support/COFF.h
  include/llvm/Target/Target.td
  include/llvm/Target/TargetOpcodes.h
  lib/CodeGen/AsmPrinter/WinCodeViewLineTables.cpp
  lib/CodeGen/AsmPrinter/WinCodeViewLineTables.h
  lib/MC/MCStreamer.cpp
  lib/Target/X86/X86FrameLowering.cpp
  utils/TableGen/CodeGenTarget.cpp

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