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Linker: Avoid scheduling the link of a global value twice due to an a… #2893

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dexonsmith
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…lias

3d4f3a0 (https://reviews.llvm.org/D20586) avoided rescheduling
a global value that was materialized first through a regular value, and
then again through an alias. This commit catches the dual, avoiding
rescheduling when the global value is first materialized through an
alias.

Differential Revision: https://reviews.llvm.org/D101419
Radar-Id: rdar://75752728

…lias

3d4f3a0 (https://reviews.llvm.org/D20586) avoided rescheduling
a global value that was materialized first through a regular value, and
then again through an alias. This commit catches the dual, avoiding
rescheduling when the global value is first materialized through an
alias.

Differential Revision: https://reviews.llvm.org/D101419
Radar-Id: rdar://75752728
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@swift-ci test

@dexonsmith dexonsmith merged commit 18a8f4b into swiftlang:apple/stable/20210107 Apr 28, 2021
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