Add neg bit

[anjali411]

Stack from ghstack:

• Add fast path for torch.{mm, addmm, bmm, baddbmm} when the inputs are conjugate transpose #59380 Add fast path for addmm when the inputs are conjugate
• Add neg bit  #56058 Add neg bit

User facing changes:

1. Adds a negative bit and corresponding new API (is_neg(),resolve_neg())
2. tensor.conj().imag now returns a floating point tensor with neg bit set to 1 instead of a tensor with no notion of negative bit. Note that imag is still a view and all the view properties still hold for imag.

Non user facing changes:

1. Added a new Negative dispatch key and a backend fallback to handle it
2. Updated copy kernel to handle negative bit
3. Merged conjugate and negative bit fallback kernel
4. fixed _unsafe_view returns copy if self has conjugate bit set #60478 (caused due to Conjugate View #54987)

Testing:

1. Added a new OpInfo based test test_neg_view (verifies that out-of-place and in-place operations work correctly for all operations when the input is a neg view tensor by checking the result against an actually negated tensor, verifies that autograd returns the same output for both neg view and actually negated tensors as well as it works fine when grad_out is a neg view).
2. Added a new test class containing test_conj_view, test_neg_view.

Differential Revision:

Differential Revision: D29636403

[facebook-github-bot]

💊 CI failures summary and remediations

As of commit 9df93ff (more details on the Dr. CI page and at hud.pytorch.org/pr/56058):

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• 3/3 failures possibly* introduced in this PR
  • 1/3 non-scanned failure(s)

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🕵️ 2 new failures recognized by patterns

The following CI failures do not appear to be due to upstream breakages:

pytorch_linux_xenial_cuda11_1_cudnn8_py3_gcc7_build (1/2)

Step: "Build" (full log | diagnosis details | 🔁 rerun)

Jul 12 20:05:55 rm: cannot remove '/var/lib/jenkins/sccache_error.log': No such file or directory

Jul 12 20:05:55 ++++ extract_trap_cmd
Jul 12 20:05:55 ++++ printf '%s\n' ''
Jul 12 20:05:55 +++ printf '%s\n' cleanup
Jul 12 20:05:55 ++ trap -- '
Jul 12 20:05:55 cleanup' EXIT
Jul 12 20:05:55 ++ [[ pytorch-linux-xenial-cuda11.1-cudnn8-py3-gcc7-build != *pytorch-win-* ]]
Jul 12 20:05:55 ++ which sccache
Jul 12 20:05:55 ++ sccache --stop-server
Jul 12 20:05:55 ++ true
Jul 12 20:05:55 ++ rm /var/lib/jenkins/sccache_error.log
Jul 12 20:05:55 rm: cannot remove '/var/lib/jenkins/sccache_error.log': No such file or directory
Jul 12 20:05:55 ++ true
Jul 12 20:05:55 ++ [[ -n '' ]]
Jul 12 20:05:55 ++ [[ pytorch-linux-xenial-cuda11.1-cudnn8-py3-gcc7-build == *rocm* ]]
Jul 12 20:05:55 ++ SCCACHE_ERROR_LOG=/var/lib/jenkins/sccache_error.log
Jul 12 20:05:55 ++ SCCACHE_IDLE_TIMEOUT=1200
Jul 12 20:05:55 ++ RUST_LOG=sccache::server=error
Jul 12 20:05:55 ++ sccache --start-server
Jul 12 20:05:55 sccache: Starting the server...
Jul 12 20:05:55 ++ sccache --zero-stats
Jul 12 20:05:55 Compile requests                      0

Windows CI (pytorch-win-vs2019-cpu-py3) / test (default, 1, 2, windows.4xlarge) (2/2)

Step: "Run test scripts" (full log | diagnosis details | 🔁 rerun)

2021-07-12T20:59:57.9248423Z RuntimeError: test_cpp_extensions_jit failed!

2021-07-12T20:59:57.5342135Z 
2021-07-12T20:59:57.5342453Z FAILED (errors=4, skipped=8)
2021-07-12T20:59:57.5342676Z 
2021-07-12T20:59:57.5342992Z Generating XML reports...
2021-07-12T20:59:57.5343919Z Generated XML report: test-reports\python-unittest\test_cpp_extensions_jit\TEST-TestCppExtensionJIT-20210712205750.xml
2021-07-12T20:59:57.9246021Z Traceback (most recent call last):
2021-07-12T20:59:57.9246747Z   File "run_test.py", line 1088, in <module>
2021-07-12T20:59:57.9247130Z     main()
2021-07-12T20:59:57.9247496Z   File "run_test.py", line 1067, in main
2021-07-12T20:59:57.9247929Z     raise RuntimeError(err_message)
2021-07-12T20:59:57.9248423Z RuntimeError: test_cpp_extensions_jit failed!
2021-07-12T20:59:58.1242737Z 
2021-07-12T20:59:58.1243503Z (base) C:\actions-runner\_work\pytorch\pytorch\test>if ERRORLEVEL 1 exit /b 1 
2021-07-12T20:59:58.1268208Z + cleanup
2021-07-12T20:59:58.1268532Z + retcode=1
2021-07-12T20:59:58.1268790Z + set +x
2021-07-12T20:59:58.1300535Z ##[error]Process completed with exit code 1.
2021-07-12T20:59:58.1577841Z ##[group]Run # -ir => recursive include all files in pattern
2021-07-12T20:59:58.1578484Z �[36;1m# -ir => recursive include all files in pattern�[0m
2021-07-12T20:59:58.1579021Z �[36;1m7z a "test-reports-$Env:TEST_CONFIG.zip" -ir'!test\*.xml'�[0m
2021-07-12T20:59:58.1603823Z shell: C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE -command ". '{0}'"

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1 job timed out:

• pytorch_linux_xenial_cuda11_1_cudnn8_py3_gcc7_build

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[anjali411]

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[anjali411]

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[anjali411]

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[ezyang]

Maybe it's this.

[anjali411]

@anjali411 has imported this pull request. If you are a Facebook employee, you can view this diff on Phabricator.

[anjali411]

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[facebook-github-bot]

This pull request has been merged in 30e48bb.