This includes changes to build TVM runtime for Hexagon.

* clean up tf frontend

* fix get_relay_op

* fix

* fix interpreter

* add build gcn tutorial

* add transpose operator for square sparse matrices

* remove extra files

* change loop tag

* comply with lint

* comply with lint -- line too long

* comply with lint

* lint check

* lint check

* lint check

* apply marisa and theirry's reviews

* save

lint some

lint

lint

add charrnn

save

save

save

remove debug

remove debug

remove space

refactor

save

rewrite dce

* reset files

* join -> meet

* lint

* address review comment

* wordsmith

* Update Softmax compute and CPU schedule

* Add C++ compute

* Fix schedule

* Update CUDA and OpenGL schedules

* Fix log_softmax

* Fix hls and opengl schedules

* Fix CUDA schedule

* Fix gather_nd in Relay

* Add test cases for gather_nd.

* added wholething

* changed build and makefile

* fix

* lint

* [AutoTVM] Fix hang/crash issues on feature extraction

* Update xgboost_cost_model.py

* fix lint

* add dgl to docker file

* add dgl to docker file

* [TOPI] Memoize winograd matrix

* lint

* Fix name

* [Relay][Quantization] Support floating-point scale

* [Relay][Quantization] KL-divergence calibration on dataset

* Fix unhandled LeftShift case in QuantizeRealize

* Fix lint

* drop QBias

* fix lint

* address comments

* address comments

* Update comments

* address comments

* lint

* kQIdentity = 0

* [Relay][VM] Support execution on devices

* Reduce Copy calls

* Cleanup

* Lint

* CR comments

* Merge test into test_vm.py

The patch adds support for Tensorflow operators log1p and cos
Tensorflow log1p is described at https://www.tensorflow.org/api_docs/python/tf/math/log1p
Tensorflow cos is described at https://www.tensorflow.org/api_docs/python/tf/math/cos
Tensorflow sin is described at https://www.tensorflow.org/api_docs/python/tf/math/sin

* add fatal

lint

lint

lint

do

make completeness check an error

lint

remove fatal

* fix test

* reset parser file

* remove unneeded import

* Update python/tvm/relay/adt.py

Co-Authored-By: Steven S. Lyubomirsky <slyubomirsky@gmail.com>

* Update include/tvm/relay/adt.h

Co-Authored-By: Steven S. Lyubomirsky <slyubomirsky@gmail.com>

* Eliminate trailing whitespace (my fault)

Fix typo names in caffe2 and onnx frontend:
* sotrage_order -> storage_order
* OpNotInplemented -> OpNotImplemented

This side effect at module import time has a race condition between the "exists" check and the "mkdir" call.  The safer thing is to just call mkdir and catch the "already exists" error which is what makedirs does.

* intel graphics conv2d bugs fixed for inception_v3

* intel conv2d api updated, nn input size 4 condition added

* review addressed

* move conv_tags to attributes

* ssd doc updated

* address comment

* relay vm serialization

* fix lint

* load params, fix stream

* lint

* fix typo

* [TOPI][CUDA] schedule for group_conv2d

* Fix #flops

* initial compilation script for chisel-vta;

* replace tabs with spaces;

* compile script for de10-nano;

* remove generated verilog source code;

* remove `altsource_probe`, `debounce`, `edge_detect` ip;

* replace quartus project files with a single tcl script;

* Update install.md

* improved makefile-based compilation script;

* complete makefile-based compilation of chisel-vta for de10-nano;

* install quartus;

* conversion to .rbf file;

* document chisel-vta compilation process for de10-nano;

* rename generated bitstream file;

* download and extract custom ip for de10-nano;

* minor change

* minor change

* fix indentation;

* bug fix;

* improved robustness in makefile;

* clean up;

* add `.sdc .ipx .qsys` allowance in jenkins;

* add ASF header;

* add ASF header;

* remove IntelShell.scala, update vta_hw.tcl, clean up Makefile & soc_system.qsys;

* add ASF header;

* keep sources compact;

* keep sources compact;

* it's not necessary now

* AXI4LiteClient -> AXI3Client for IntelShell

* remove connection to fpga_only_master;

* a few important bug fix: wire reset pin, and set host_r_last to high

* remove intel specific interface definition;

* add NO_DSP option in Makefile;

* AXI4Lite is not used in IntelShell;

* minor fix: disable dsp and use logic instead;

* quartus version change: 18.0 -> 18.1

* remove altera related statement;

* compose compile_design.tcl

* initial tcl script for soc_system generation;

* remove .qsys file;

* remove unused;

* .qsys can be generated by tcl script;

* remove hps_io and shrink size of soc_system;

* integrate into makefile;

* version change: 18.0 -> 18.1

* add sample config file for de10-nano;

* parameterize DEVICE and PROJECT_NAME

* remove extra lines;

* brief description on flashing sd card image for de10-nano

* docs on building additional components

* parameterize DEVICE and DEVICE_FAMILY

* parameterize DEVICE and DEVICE_FAMILY

* parameterize DEVICE and DEVICE_FAMILY

* de10-nano -> de10nano

* minor change

* add comment in code and document in order to address review comments;

* fix in IR pass to support padding on 6-d tensors

* support for both N>1 and N==1 for padding

* batch size > 1 tuning and base config

* output formatting

* batch conv2d

* print all category results

* revert to single-batch config

* pick record best

* fix conv test

* improving reporting

* address batching bug in fast simulator

* fix

* Fixed topi bdist_wheel build to include libraries.

* Removed unneeded imports

* Fix traverse_inline not inline zero input op properly

* Add where to python and set tag to broadcast

* Fix inline

* test

* fix test target

* fix