Implement clip_ranges operator for PyTorch
Test Plan:
unit test for correctness
```
buck test caffe2/torch/fb/sparsenn:test -- test_clip_ranges
Parsing buck files: finished in 1.6 sec
Creating action graph: finished in 18.9 sec
Building: finished in 15.0 sec (100%) 9442/9442 jobs, 1 updated
Total time: 35.6 sec
More details at https://www.internalfb.com/intern/buck/build/66fb17de-859e-4d01-89bf-5c5de2950693
Tpx test run coordinator for Facebook. See https://fburl.com/tpx for details.
Running with tpx session id: 80f5e0c2-7db2-48a4-b148-25dd34651682
Trace available for this run at /tmp/tpx-20201026-123217.050766/trace.log
Started reporting to test run: https://our.intern.facebook.com/intern/testinfra/testrun/4503599665041422
✓ ListingSuccess: caffe2/torch/fb/sparsenn:test - main (14.912)
✓ Pass: caffe2/torch/fb/sparsenn:test - test_clip_ranges (caffe2.torch.fb.sparsenn.tests.sparsenn_operators_test.SparseNNOperatorsTest) (14.098)
Summary
Pass: 1
ListingSuccess: 1
Finished test run: https://our.intern.facebook.com/intern/testinfra/testrun/4503599665041422
```
new benchmark perf test
```
# ----------------------------------------
# PyTorch/Caffe2 Operator Micro-benchmarks
# ----------------------------------------
# Tag : short
# Benchmarking PyTorch: clip_ranges
# Mode: JIT
# Name: clip_ranges_LENGTH6_M1_N2_MAX_LENGTH1_dtypetorch.int32_cpu
# Input: LENGTH: 6, M: 1, N: 2, MAX_LENGTH: 1, dtype: torch.int32, device: cpu
Forward Execution Time (us) : 155.765
# Benchmarking PyTorch: clip_ranges
# Mode: JIT
# Name: clip_ranges_LENGTH7_M1_N2_MAX_LENGTH2_dtypetorch.int32_cpu
# Input: LENGTH: 7, M: 1, N: 2, MAX_LENGTH: 2, dtype: torch.int32, device: cpu
Forward Execution Time (us) : 156.248
# Benchmarking PyTorch: clip_ranges
# Mode: JIT
# Name: clip_ranges_LENGTH8_M1_N2_MAX_LENGTH3_dtypetorch.int32_cpu
# Input: LENGTH: 8, M: 1, N: 2, MAX_LENGTH: 3, dtype: torch.int32, device: cpu
Forward Execution Time (us) : 156.634
# Benchmarking PyTorch: clip_ranges
# Mode: JIT
# Name: clip_ranges_LENGTH9_M1_N2_MAX_LENGTH4_dtypetorch.int32_cpu
# Input: LENGTH: 9, M: 1, N: 2, MAX_LENGTH: 4, dtype: torch.int32, device: cpu
Forward Execution Time (us) : 155.408
# Benchmarking PyTorch: clip_ranges
# Mode: JIT
# Name: clip_ranges_LENGTH10_M1_N2_MAX_LENGTH5_dtypetorch.int32_cpu
# Input: LENGTH: 10, M: 1, N: 2, MAX_LENGTH: 5, dtype: torch.int32, device: cpu
Forward Execution Time (us) : 165.168
```
Compare with the old implementation, there are **around 300us gain**
```
# ----------------------------------------
# PyTorch/Caffe2 Operator Micro-benchmarks
# ----------------------------------------
# Tag : short
# Benchmarking PyTorch: clip_ranges
# Mode: JIT
# Name: clip_ranges_LENGTH6_M1_N2_MAX_LENGTH1_dtypetorch.int32_cpu
# Input: LENGTH: 6, M: 1, N: 2, MAX_LENGTH: 1, dtype: torch.int32, device: cpu
Forward Execution Time (us) : 443.012
# Benchmarking PyTorch: clip_ranges
# Mode: JIT
# Name: clip_ranges_LENGTH7_M1_N2_MAX_LENGTH2_dtypetorch.int32_cpu
# Input: LENGTH: 7, M: 1, N: 2, MAX_LENGTH: 2, dtype: torch.int32, device: cpu
Forward Execution Time (us) : 446.480
# Benchmarking PyTorch: clip_ranges
# Mode: JIT
# Name: clip_ranges_LENGTH8_M1_N2_MAX_LENGTH3_dtypetorch.int32_cpu
# Input: LENGTH: 8, M: 1, N: 2, MAX_LENGTH: 3, dtype: torch.int32, device: cpu
Forward Execution Time (us) : 444.064
# Benchmarking PyTorch: clip_ranges
# Mode: JIT
# Name: clip_ranges_LENGTH9_M1_N2_MAX_LENGTH4_dtypetorch.int32_cpu
# Input: LENGTH: 9, M: 1, N: 2, MAX_LENGTH: 4, dtype: torch.int32, device: cpu
Forward Execution Time (us) : 445.511
# Benchmarking PyTorch: clip_ranges
# Mode: JIT
# Name: clip_ranges_LENGTH10_M1_N2_MAX_LENGTH5_dtypetorch.int32_cpu
# Input: LENGTH: 10, M: 1, N: 2, MAX_LENGTH: 5, dtype: torch.int32, device: cpu
Forward Execution Time (us) : 450.468
```
Reviewed By: MarcioPorto
Differential Revision: D24546110
fbshipit-source-id: e6c9b38e911f177f97961ede5bf375107f240363
