- Note for an additional required change in transformFunctionToVoid

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

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) modified makefiles to apply loop unroll and sroa optimizations to generated
kernel to get rid of private arrays
(3) Removed the call to remove declarations in SPIR backend

Changed SPIR backend to generate bitcode again. Added code to remove unsupported function attributes. Backend is still not working though

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

Created Abstract class DFG2LLVM. The two passes DFG2LLVM_NVPTX and DFG2LLVM_X86 inherit from this class. Common features/functions have been put in the abstract class DFG2LLVM

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

(1) Working on implementation of further lowereing the visc api by breaking the
DFG launch call into init, launch, wait, cleanup. There are issues pending when
these require some kind of inter procedural analysis to link init, launch, wait
and cleanup. This is necessary during code generation.
(2) Also contains changes which simplify GenVISC pass by using macro for
identifying various source __visc__ calls

(2) Added dummy function calls for visc initialization and visc clean up to
benchmarks and added support for it to all the passes.
(3) Timers are now only printed once
(4) Added extra timers to parboil header file

global variable s for timers.

    This would help to use timers in any pass
(2) Added a command line argument -visc-timers to DFG2LLVM X86/NVPTX passes to
    turn on/off timers based on the command line argument
(3) Added stencil makefile which was missing till now from repo
(4) DFG2LLVM_NVPTX uses timers now

(2) Changes to Makefile of passes to ignore C++11 warnings

fixes a bug in running multiple iterations of stencil kernel
(2) Formatted opencl_base version of stencil in parboil