onnxruntime

ce3158ac - Add opset 21/23 CUDA kernel registrations for Flatten, Identity, If, Loop, Scan, ConstantOfShape, Size (#27728)

Add opset 21/23 CUDA kernel registrations for Flatten, Identity, If, Loop, Scan, ConstantOfShape, Size (#27728) ## Summary - Extend CUDA EP opset 21/23 kernel registrations to 7 additional operators that were updated in ONNX opset 21 but lacked proper CUDA kernel version declarations - Operators fixed: **Flatten**, **Identity**, **If**, **Loop**, **Scan**, **ConstantOfShape**, **Size** - Follows the identical pattern established in PR #26075 for Shape, Reshape, Transpose, Squeeze, Unsqueeze ## Motivation Fixes #27102. When ONNX introduces a new operator version in opset 21, ORT's `VerifyVersion` function in `kernel_registry.cc` rejects non-versioned (open-ended) CUDA kernels. The check at [kernel_registry.cc:L126-L133](https://github.com/microsoft/onnxruntime/blob/main/onnxruntime/core/framework/kernel_registry.cc#L126) requires either an exact version match or a bounded version range — a kernel registered as `since_version=N, end_version=INT_MAX` fails when `since_ver` (from the opset 21 schema) differs from `N`. This causes the affected operators to fall back from CUDA to CPU, introducing unnecessary host↔device memory copies. On Windows with CUDA EP, this fallback path can produce corrupted shape computation values (e.g., `124647109376` instead of `6`), leading to downstream Reshape failures. PR #26075 fixed this for Shape, Reshape, Transpose, Squeeze, and Unsqueeze. This PR extends the same fix to the 7 remaining operators that were updated in ONNX opset 21 and had non-versioned CUDA kernels. ## Changes For each of the 7 operators: 1. **Cap existing non-versioned kernel** to opset 20 (`ONNX_OPERATOR_KERNEL` → `ONNX_OPERATOR_VERSIONED_KERNEL`) 2. **Add VERSIONED(21, 22) kernel** with identical type constraints 3. **Add non-versioned opset 23 kernel** for forward compatibility (opset 23 introduced another schema update for these operators) Files modified: - `onnxruntime/core/providers/cuda/cuda_execution_provider.cc` — forward declarations + `BuildKernelCreateInfo` registration - `onnxruntime/core/providers/cuda/tensor/flatten.cc` - `onnxruntime/core/providers/cuda/tensor/identity_op.cc` - `onnxruntime/core/providers/cuda/tensor/size.cc` - `onnxruntime/core/providers/cuda/generator/constant_of_shape.cc` - `onnxruntime/core/providers/cuda/controlflow/if.cc` - `onnxruntime/core/providers/cuda/controlflow/loop.cc` - `onnxruntime/core/providers/cuda/controlflow/scan.cc` ## Test Plan - [ ] Verify CUDA EP build compiles successfully (CI) - [ ] Existing opset 21 tests for Shape/Reshape/Squeeze/Unsqueeze pass (validates the pattern) - [ ] Verify operators are no longer falling back to CPU when running opset 21 models on CUDA - [ ] No regression in existing CUDA EP tests