(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

(2) PTX Pass changed to support parameters being used to pass grid and block
    size to kernel nodes.
M    Transforms/ClearDFG/ClearDFG.cpp
M    Transforms/DFG2LLVM_NVPTX/DFG2LLVM_NVPTX.cpp

    set. This is important so as not to fail in case of 2-level PTX kernel,
    where the intermediate node does not have a gen function, but would pass
    because its parent has one.
(2) Modified PTX pass to
    i.  Correct mapping of arguments between intermediate and kernel launch node
    ii. Allow both constants and arguments as node limit values
    iii.Generate get_group_id and get_global_id correctly

M    Transforms/DFG2LLVM_X86/DFG2LLVM_X86.cpp
M    Transforms/DFG2LLVM_NVPTX/DFG2LLVM_NVPTX.cpp

call of exec node. Useful for codegen of 2-level hierarchy kernels

parent instead of getInValAt() function

    in out attributes of arguments
(2) check-point commit in preparing mri-q benchmark

line. metadata.py is not required anymore

environment variable LLVM_SRC_ROOT is set, then running test cases should work.
The passes and llvm-lit now use this variable to get llvm source root and define
all paths relative to it

Changes to makefile and visc-rt to hide print statements by default and only enable when using make DEBUG=1

(2) Modified both MatrixMultiplication test cases to have empty return structs
    types
(3) visc-rt changed to reflect the same

(2) Changes to visc-rt to now have just one function to set a kernel parameter,
    no matter input or output.
(3) Matrix Multiplication example working.
(4) Changes to DFG2LLVM_NVPTX pass to generate calls to runtime api to read
    pointer parameters with out attribute.

(2) Made all the local functions static so that they are not visible outside
    this file
(3) Runs correctly. Now have to finish support for attributes

Point to note: Writing a module messes it up in memory, hence it should always
be done when it is not to be used anymore

name, local and global sizes.

    binary
(2) Several hacks in visc-rt to estimate the work required to get
    MatrixMultiplication to work. 3 issues need to be resolved
    i)    The metadata for kernel followed by number of kernels has to be one
          single metadata
    ii)   Get Kernel name and work group sizes in NVPTX pass
    iii)  Major: Cannot use device memory pointer as cl_mem. Fundamentally
          this is a design compatibility issue with VISC and OpenCL 1.1.
          OpenCL 2.0 might resolve it

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