[hipDNN] Pre-populate operation type enum and dispatch scaffolding for op lifting

[SamuelReeder]

Motivation

Every lifting PR needs to add entries to three shared files: HipdnnOperationType.h (enum values), OperationUnpacker.hpp (dispatch cases), and NodeFactory.cpp/.hpp (factory dispatch). Without pre-populating these files, each lifting PR touches the same lines and causes merge conflicts.

This PR front-loads all necessary enum values and dispatch stubs so that each individual lifting PR only needs to implement unpack_from_descriptor() on its frontend node and fromNode() on its backend descriptor — no shared file conflicts.

Technical Details

HipdnnOperationType.h — Extended the hipdnnOperationType_t enum with 11 new values (7–17): BATCHNORM, POINTWISE, MATMUL, RMSNORM, LAYERNORM, SDPA_FORWARD, BLOCK_SCALE_QUANTIZE, SDPA_BACKWARD, BLOCK_SCALE_DEQUANTIZE, CUSTOM_OP, and REDUCTION.

OperationUnpacker.hpp — Added #include directives for all 17 frontend node headers and added active dispatch cases in createNodeForType() for all 15 operation types that have existing node classes (everything except REDUCTION). Each case instantiates the node with default-constructed attributes. Since INode::unpack_from_descriptor() returns "not implemented" by default, these cases are safe: they produce a clear error until each lifting PR overrides the method on its specific node class.

NodeFactory.cpp / NodeFactory.hpp — Added commented-out dispatch cases and #include directives for all 15 remaining operation descriptors. Each block is labeled with a comment to uncomment when fromNode() is implemented in the corresponding lifting PR.

BackendEnumStringUtils.hpp — Added #include "HipdnnOperationType.h", a new hipdnnGetOperationTypeString() function covering all 18 enum values, and two previously missing attribute name string cases: HIPDNN_ATTR_OPERATION_TYPE_EXT and HIPDNN_ATTR_OPERATION_NAME_EXT.

TestBackendEnumStringUtils.cpp — Added a GetOperationTypeString test covering all 18 enum values plus the unknown sentinel, tests for the two newly added attribute name strings, and an unknown-attribute sentinel test.

Note: DescriptorFactory, GraphUnpacker, Graph.hpp, CMakeLists, and test_sdk were already fully populated during the lowering PRs and are not conflict points for lifting.

Test Plan

• Build hipdnn_backend and hipdnn_frontend
• TestBackendEnumStringUtils passes (all 10 test cases)
• TestOperationUnpacker passes (all 2 test cases)
• Full hipdnn test suite passes (9 test executables)

Submission Checklist

• Look over the contributing guidelines at https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.

[BrianHarrisonAMD]

LGTM

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.

❌ Your project status has failed because the head coverage (77.21%) is below the target coverage (80.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5570      +/-   ##
===========================================
+ Coverage    67.27%   67.27%   +0.01%     
===========================================
  Files         1844     1844              
  Lines       284014   284061      +47     
  Branches     39839    39860      +21     
===========================================
+ Hits        191044   191092      +48     
+ Misses       76512    76509       -3     
- Partials     16458    16460       +2     

Flag	Coverage Δ		*Carryforward flag
hipBLAS	90.67% <ø> (ø)		Carriedforward from 02f625e
hipBLASLt	43.49% <ø> (ø)		Carriedforward from 02f625e
hipCUB	82.21% <ø> (ø)		Carriedforward from 02f625e
hipDNN	85.15% <100.00%> (+0.02%)	⬆️
hipFFT	55.59% <ø> (ø)		Carriedforward from 02f625e
hipRAND	76.12% <ø> (ø)		Carriedforward from 02f625e
hipSOLVER	68.81% <ø> (ø)		Carriedforward from 02f625e
hipSPARSE	84.70% <ø> (ø)		Carriedforward from 02f625e
rocBLAS	47.97% <ø> (ø)		Carriedforward from 02f625e
rocFFT	53.24% <ø> (ø)		Carriedforward from 02f625e
rocRAND	57.07% <ø> (ø)		Carriedforward from 02f625e
rocSOLVER	77.21% <ø> (ø)		Carriedforward from 02f625e
rocSPARSE	71.48% <ø> (ø)		Carriedforward from 02f625e

*This pull request uses carry forward flags. Click here to find out more.

Files with missing lines	Coverage Δ
...ects/hipdnn/backend/src/BackendEnumStringUtils.hpp	100.00% <100.00%> (+0.27%)	⬆️
...cts/hipdnn/backend/src/descriptors/NodeFactory.cpp	100.00% <ø> (ø)
...clude/hipdnn_frontend/detail/OperationUnpacker.hpp	100.00% <ø> (ø)

... and 2 files with indirect coverage changes

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