Bug fix in nvptx and spir backends related to adding arguments to
node functions.

(CPU/GPU/SPIR) based on policy.
Support for scheduling per iteration included.
Further testing required.

This one identifies allocation node and add s the property to the node. Can be
used by passes later

This field can be used to contain pointer to Node specific properties.
Currently used for Allocation Node property which is a list of Edge, Value pairs

(1) Changes to DFGraph.h for identifying streaming graphs and edges
(2) Added/modified launch, wait, push, pop intrinsics for streaming graphs
(3) Changes to DFG2LLVM_X86.cpp and DFG2LLVM.h pass to support code gen for streaming
(4) BuildDFG.cpp modified to create streaming edges
(5) Modified visc-rt.cpp and visc-rt.h to add runtime support for streaming

code enquires about its ancestor. Enables to run visc parboil benchmarks on x86
alone

(2) Modified unittests to have llvm.visc.init and cleanup intrinsics. Now they
all pass

(3) Modified visc.mk to easily compile visc version for just x86. Pass
TARGET=x86 as option to make command

Need to extend when we want to support more than one nodes providing outputs.   

(2) Changes to DFGraph.h and visc-rt.cpp were not committed before.

M    llvm/test/VISC/parboil/benchmarks/mri-q/src/opencl/kernels.cl
M    llvm/test/VISC/parboil/benchmarks/mri-q/src/opencl/main.c
M    llvm/test/VISC/parboil/benchmarks/mri-q/src/opencl/macros.h
M    llvm/test/VISC/parboil/benchmarks/mri-q/src/opencl/ocl.c
M    llvm/test/VISC/parboil/benchmarks/mri-q/Makefile
M    llvm/include/llvm/IR/DFGraph.h
M    llvm/projects/visc-rt/visc-rt.cpp

is incompatible with visc-rt
(2) Set GenFunc pointer to NULL. Completely removed FMap from both backend
passes. Now generated func info is contained in DFNode itself.
(3) Added Makefile to visc-rt for easy compilation to generate visc-rt.ll

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) 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

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

(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

Next step is to add support for new bind intrinsic.
(2) Minor bug fixes
M    llvm/include/llvm/IR/DFGraph.h
M    llvm/lib/Transforms/BuildDFG/BuildDFG.cpp
M    llvm/lib/Transforms/DFG2LLVM_X86/DFG2LLVM_X86.cpp

(2) Updated the DFG2LLVM_X86 pass to pass correct dim limit values while
generating code for internal node

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

graph.
(2) Added support for various query intrinsics in leaf node code generation for
x86 including adding index and limit variables to leaf node function arguments.

refactored BuildDFG code. Now just addEdgeToDFGraph should be enough to make all the successor and predecessor changes to nodes

Removed warnings because of unused members of DFEdge class. Changed Source and Destination positions of DFEdge to unsigned

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).

- one-to-one and all-to-all edge types
- integers as argument positions

2. Launch intrinsic
   Right now the graph builder pass is outdated,
   more changes are required.

Fixed the error in build regarding calling non-static function. Also, the dot files are now written from the current directory