[5.9] LoadableByAddress: convert types of functions which are contained in structs inside global static initializers #65504
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• Description: We missed converting such types inside static initializers of global variables. This results in ptrauth crashes when ptrauth is enabled.
• Risk: low. It only affects functions (closures) which are stored in global/static variables
• Original PR: #65492
• Reviewed By: @aschwaighofer
• Testing: done with a lit test
• Resolves: rdar://108165425