[AutoDiff] Use auto-generated locations for temporary allocations. #40503
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@swift-ci please smoke test |
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This also resolves SR-15566, thanks! |
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@rxwei you missed one it is also AutoDiff/validation-test/optional_property.swift |
In `TangentBuilder` temporary allocations are emitted in order to make generic calls to `AdditiveArithmetic.zero` and `AdditiveArithmetic.+`. When we perform accumulation of two adjoint values that correspond to a lexical value in the original function, the stack allocations require a debug variable, as we use the original instruction's location. However such a debug variable wouldn't really make sense as these temporary allocations do not represent the original variable's adjoint. With lexical borrow scopes, we hit a crasher when creating temporary allocations when accumulating adjoints for lexical `begin_borrow` instructions. This PR makes `TangentBuilder`'s temporary allocations use an auto-generated location. The existing debug info emission behavior is not changed, as we still emit `debug_value` when materializing an `AdjointValue` after any necessary adjoint accumulation.
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Fixed. And added a test for SR-15566. |
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@swift-ci please smoke test |
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@swift-ci please test windows platform |
gottesmm
approved these changes
Dec 11, 2021
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In
TangentBuildertemporary allocations are emitted in order to make generic calls toAdditiveArithmetic.zeroandAdditiveArithmetic.+. When we perform accumulation of two adjoint values that correspond to a lexical value in the original function, the stack allocations require a debug variable, as we use the original instruction's location. However such a debug variable wouldn't really make sense as these temporary allocations do not represent the original variable's adjoint. With lexical borrow scopes, we hit a crasher when creating temporary allocations when accumulating adjoints for lexicalbegin_borrowinstructions.This PR makes
TangentBuilder's temporary allocations use an auto-generated location. The existing debug info emission behavior is not changed, as we still emitdebug_valuewhen materializing anAdjointValueafter any necessary adjoint accumulation.