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CrossModuleOptimization: fix crash when importing a module as implementationOnly

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If a function uses a type imported as implementationOnly (or similar), it cannot be serialized.

I added a new API in ModuleDecl (canBeUsedForCrossModuleOptimization), which performs this check.

rdar://72864719
This commit is contained in:
Erik Eckstein
2021-01-18 13:06:53 +01:00
parent d36fae5840
commit e3d636e519
6 changed files with 101 additions and 6 deletions
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4
include/swift/AST/Module.h
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@@ -626,6 +626,10 @@ public:
/// This assumes that \p module was imported.
bool isImportedImplementationOnly(const ModuleDecl *module) const;
/// Returns true if a function, which is using \p nominal, can be serialized
/// by cross-module-optimization.
bool canBeUsedForCrossModuleOptimization(NominalTypeDecl *nominal) const;
/// Finds all top-level decls of this module.
///
/// This does a simple local lookup, not recursively looking through imports.