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(#7728)
* Initial plan
* Fix duplicate DiffPair struct generation for row_major matrices in autodiff
Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com>
* Fix matrix layout conversion to use BuiltinCastExpr
Address root cause in slang-check-conversion.cpp by creating proper cast
expressions for matrix layout conversions instead of reusing expressions.
This ensures autodiff sees proper type conversions and generates consistent
DiffPair structs.
Reverted the band-aid fix in autodiff system and implemented the proper
front-end fix as suggested in code review.
Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com>
* Fix test to prevent dead code elimination and make it executable on CPU
Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com>
* Fix spirv emit of matrix layout cast insts.
* Update test.
* cleanup test.
* Improve test with meaningful values that verify correct gradient computation
Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com>
---------
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: csyonghe <2652293+csyonghe@users.noreply.github.com>
Co-authored-by: Yong He <yonghe@outlook.com>
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