================
@@ -28,16 +28,24 @@ namespace clang {
/// each \a ModuleManager sees the same files.
class InMemoryModuleCache : public llvm::RefCountedBase<InMemoryModuleCache> {
struct PCM {
----------------
cyndyishida wrote:
Can Size/ModTime ever stay null for the lifetime of `PCM` saved in
`InMemoryModuleCache`? My assumption is no, because this documentation states
this is only used for implicit module builds, but the logic in
`ModuleManager::addModule` can trigger when resolving explicit modules which do
not rely on `ModTime`, so I am unsure.
https://github.com/llvm/llvm-project/pull/190207
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