Ravi Kandhadai a6bed21d9e [SIL Optimization] Make ArraySemantics.cpp aware of "array.uninitialized_intrinsic" ...

semantics attribute that is used by the top-level array initializer (in ArrayShared.swift),
which is the entry point used by the compiler to initialize array from array literals.
This initializer is early-inlined so that other optimizations can work on its body.

Fix DeadObjectElimination and ArrayCOWOpts optimization passes to work with this
semantics attribute in addition to "array.uninitialized", which they already use.

Refactor mapInitializationStores function from ArrayElementValuePropagation.cpp to
ArraySemantic.cpp so that the array-initialization pattern matching functionality
implemented by the function can be reused by other optimizations.

2020-02-05 14:28:34 -08:00

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