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[AutoDiff upstream] [SIL] Add differentiable function instructions.

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Add `differentiable_function` and `differentiable_function_extract`
instructions.

`differentiable_function` creates a `@differentiable` function-typed
value from an original function operand and derivative function operands
(optional).

`differentiable_function_extract` extracts either the original or
derivative function value from a `@differentiable` function.

The differentiation transform canonicalizes `differentiable_function`
instructions, filling in derivative function operands if missing.

Resolves TF-1139 and TF-1140.
This commit is contained in:
Dan Zheng
2020-03-22 11:50:36 -07:00
parent 603db8c954
commit cc7e9fc39e
21 changed files with 762 additions and 5 deletions
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lib/Serialization/ModuleFormat.h
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@@ -55,7 +55,7 @@ const uint16_t SWIFTMODULE_VERSION_MAJOR = 0;
/// describe what change you made. The content of this comment isn't important;
/// it just ensures a conflict if two people change the module format.
/// Don't worry about adhering to the 80-column limit for this line.
const uint16_t SWIFTMODULE_VERSION_MINOR = 548; // remove curried SILDeclRefs
const uint16_t SWIFTMODULE_VERSION_MINOR = 549; // differentiable_function, differentiable_function_extract
/// A standard hash seed used for all string hashes in a serialized module.
///