Removed unneeded(for now) metadata.

the default.

They are not entirely similar to those we have observed.
They contain the same information, but in a different setting.
We still need to see if the nvptx backend will accept this format.

Global and Generic memory in NVPTX backend. Still commiting the code with
functions to change address space of arguments, but not calling them. Might need
in future if things break.

M    llvm/projects/visc-rt/visc-rt.cpp

pointer, size ... format for PTX nodes
(2) refactoring DFG2LLVM passes. Moving all the ptx code to ptx pass.
M    llvm/projects/visc-rt/visc-rt.cpp
M    llvm/lib/Transforms/DFG2LLVM_X86/DFG2LLVM_X86.cpp
M    llvm/lib/Transforms/DFG2LLVM_NVPTX/DFG2LLVM_NVPTX.cpp

the graphID as reference. It is returned by the launch functions. Makes it
easier to write code
(2) BuildDFG support for data transfer to PTX nodes
(3) ClearDFG bugs fixed
(4) visc-rt modified
(5) Test case 3level.ll modified to match the new launch and wait intrinsic
format

M    llvm/test/VISC/unitTests/3level.ll
M    llvm/include/llvm/IR/DFGraph.h
M    llvm/include/llvm/IR/IntrinsicsVISC.td
M    llvm/projects/visc-rt/visc-rt.cpp
M    llvm/lib/Transforms/BuildDFG/BuildDFG.cpp
M    llvm/lib/Transforms/DFG2LLVM_X86/DFG2LLVM_X86.cpp
M    llvm/lib/Transforms/ClearDFG/ClearDFG.cpp

(2) Modified BuildDFG and DFG2LLVM_X86 to generate the correct calls to visc
runtime
(3) Modified the test cases to the new launch wait semantics of visc
(4) Added Wait intrinsic to VISC and modified the argument list of launch and
wait

changed to load a kernel binary (ptx) instead of kernel source

Now we add an argument that is a pointer to the function's (struct) return type.

(2) Modified singleNode.ll to do some computation in main as well
M    llvm/test/VISC/unitTests/singleNode.ll
M    llvm/lib/Transforms/DFG2LLVM_X86/DFG2LLVM_X86.cpp

delete only nodes for which code has been generated.
(2) Modified DFG2LLVM_X86 to not delete Launch Intrinsic (now that is part of
clearDFG) and fixed freed the memory allocated by CodeGenTraversal
M    llvm/lib/Transforms/DFG2LLVM_X86/DFG2LLVM_X86.cpp
A    llvm/lib/Transforms/ClearDFG
A    llvm/lib/Transforms/ClearDFG/ClearDFG.cpp
A    llvm/lib/Transforms/ClearDFG/ClearDFG.exports
A    llvm/lib/Transforms/ClearDFG/CMakeLists.txt
A    llvm/lib/Transforms/ClearDFG/Makefile

(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

M    llvm/test/VISC/unitTests/twoNodeConnect.ll
M    llvm/test/VISC/unitTests/queryNumNodeInst.ll
M    llvm/test/VISC/unitTests/query2D.ll
M    llvm/test/VISC/unitTests/query3D.ll
M    llvm/test/VISC/unitTests/twoNode.ll
M    llvm/test/VISC/unitTests/queryNumDim.ll
M    llvm/test/VISC/unitTests/twoNodeQuery.ll
M    llvm/test/VISC/unitTests/singleNode.ll

file
(2) Fixed a bug in dfg2llvm-x86. Tests were crashing when input dimension to a
createNode1D/2D/3D intrinsic was a constant because of its absence in VMap. Now
fixed.
M    llvm/include/llvm/Support/DOTGraphTraits.h
M    llvm/include/llvm/Support/GraphWriter.h
M    llvm/include/llvm/IR/DFGraph.h
M    llvm/lib/Transforms/DFG2LLVM_X86/DFG2LLVM_X86.cpp

- Simple (only for first cut, to be reconsidered) kernel selection.
- Code refactoring.

(more testing required).

Added a (simple, to be reconsidered) way of finding a kernel.