Richard Wei 9c91d1b705 [Macros] Fix lookup of macro-produced variables (#65939) ...

Calling `getInnermostDeclContext()->getParentSourceFile()` on a macro-produced decl does not seem to be a reliable way to obtain the macro expansion source file, because `PatternBindingDecl` is not a `DeclContext` and `getInnermostDeclContext()` falls back outside the macro expansion file. This patch switches to using `getSourceFileContainingLocation` when possible.

Resolves rdar://109376568.

2023-05-18 15:32:21 -07:00

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