Add gpu driver and improvements to pointwise codegen (#851)

* Add method to compile pointwise

* Formatting

* Add lambda

* Add semicolon

* Rename variable

* Add driver to run jit kernels

* Formatting

* Add context

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* Make seperate driver folder

* Add more general gpu driver

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* Print out wll time

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* Run multiple times and skip first run

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* Seperate time_op

* Run an op for comparison

* Formatting

* Add debug asserts

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* Change parameer name

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* Fix argument order

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* Add preloading

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* Allow a different data type

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* Pipeline transformations

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* Add vectorization

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* Reduce dims

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* Compile with launch params as constant

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* Make sure buffer can be vecotrized

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* Enable vectorization and preloading

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* Add print header

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* Avoid allocating to large of LDS

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* Add some vec functions to a seperate header

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* Add stride loops

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* Improve the transform pipeline

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* Add const

* Fix shape check

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* Just check stride axis is zero

* Remove extra finc_vector_axis overload

* Simplify some mroe functions

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* Remove some more extra functions

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* Simplify more decltypes

* Add another const

* Fix test

* Get buffer pointer different for older compilers
Co-authored-by: Shucai Xiao <shucai@gmail.com>
Co-authored-by: Chris Austen <causten@users.noreply.github.com>

test/gpu/jit.cpp

@@ -54,7 +54,7 @@ using namespace migraphx;
 extern "C" {
 __global__ void kernel(void* x, void* y) 
 {
-    make_tensors(x, y)([](auto xt, auto yt) __device__ {
+    make_tensors()(x, y)([](auto xt, auto yt) __device__ {
         auto idx = make_index();
         const auto stride = idx.nglobal();
         for(index_int i = idx.global; i < xt.get_shape().elements(); i += stride)