IRGen: Inhibit alloc_stack hoisting in the presence of has_symbol instructions
#62332
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… instructions. Resolves rdar://102837282
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if #_hasSymbol(...)conditionals are used to prevent use of weakly linked symbols when they are not available. Therefore optimization needs to treat these conditionals similarly toif #available(..)conditionals and inhibit optimizations likealloc_stackhoisting.Resolves rdar://102837282