[SUA][IRGen] Add stub for swift_coroFrameAlloc that weakly links against the runtime function #80769
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…nst the runtime function (#79889) * [SUA][IRGen] Add stub for swift_coroFrameAlloc that weakly links against the runtime function This commit modifies IRGen to emit a stub function `__swift_coroFrameAllocStub` instead of the newly introduced swift-rt function `swift_coroFrameAlloc`. The stub checks whether the runtime has the symbol `swift_coroFrameAlloc` and dispatches to it if it exists, uses `malloc` otherwise. This ensures the ability to back deploy the feature to older OS targets. rdar://145239850 (cherry picked from commit 5e2f20b)
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This commit modifies IRGen to emit a stub function
__swift_coroFrameAllocStubinstead of the newly introduced swift-rt functionswift_coroFrameAlloc. The stub checks whether the runtime has the symbolswift_coroFrameAllocand dispatches to it if it exists, usesmallocotherwise. This ensures the ability to back deploy the feature to older OS targets.rdar://145239850
(cherry picked from commit 5e2f20b)