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ExplicitModuleLoader: use a temporary source manager for loading the explicit module map, NFC

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We don't need the buffer for the explicit module map to be persistent in the ASTContext.
This commit is contained in:
Xi Ge
2020-06-26 14:40:27 -07:00
parent 336d63faf4
commit fb99e840cc
1 changed files with 4 additions and 2 deletions
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6
lib/Frontend/ModuleInterfaceLoader.cpp
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@@ -1503,8 +1503,10 @@ struct ExplicitSwiftModuleLoader::Implementation {
return;
}
StringRef Buffer = fileBufOrErr->get()->getBuffer();
Stream Stream(llvm::MemoryBufferRef(Buffer, fileName),
Ctx.SourceMgr.getLLVMSourceMgr());
// Use a new source manager instead of the one from ASTContext because we
// don't want the JSON file to be persistent.
llvm::SourceMgr SM;
Stream Stream(llvm::MemoryBufferRef(Buffer, fileName), SM);
for (auto DI = Stream.begin(); DI != Stream.end(); ++ DI) {
assert(DI != Stream.end() && "Failed to read a document");
if (auto *MN = dyn_cast_or_null<SequenceNode>(DI->getRoot())) {