The SymVT stuff has not been moved yet, I removed it for now.
The test/VISC tests also have not been moved yet, so they may not
work.

(2) Have to generate code for a new Launch function which can be called by
pthread_create and which extracts the root inputs from a memory location i8*.
(3) Formatted the different files to be more consisitent with LLVM coding
principles
M    llvm/include/llvm/BuildDFG/BuildDFG.h
M    llvm/include/llvm/IR/DFGraph.h
M    llvm/lib/Transforms/BuildDFG/BuildDFG.cpp
M    llvm/lib/Transforms/DFG2LLVM_X86/DFG2LLVM_X86.cpp

(2) Added codegen support for i/o bindings in dfg2llvm-x86 pass
M    llvm/include/llvm/BuildDFG/BuildDFG.h
M    llvm/include/llvm/IR/DFGraph.h
M    llvm/lib/Transforms/BuildDFG/BuildDFG.cpp
M    llvm/lib/Transforms/DFG2LLVM_X86/DFG2LLVM_X86.cpp

instructions being generated successfully.
(2) Updated DFNode class and BuildDFG pass to make all nodes have struct as
return type.
M    llvm/include/llvm/BuildDFG/BuildDFG.h
M    llvm/include/llvm/IR/DFGraph.h
M    llvm/include/llvm/IR/IntrinsicsVISC.td
M    llvm/lib/Transforms/BuildDFG/BuildDFG.cpp
M    llvm/lib/Transforms/DFG2LLVM_X86/DFG2LLVM_X86.cpp

Changes to BuildDFG pass. Handle launch intrinsic. Added support for cast, isa, dyn_cast on DFNode. New test cases added.

intrinsic instructions with appropriate instructions/values).

(functions required to access the DFGraph for other passes)