CompilerInstance::createSourceManager()

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Revision 118203 removed the no arg version of CompilerInstance::createSourceManager, How

do we create a SourceManager if we are JITting (no source file exists)? More specifically
is the following the correct replacement–I have not “created” file system ops? Even though the
new code works, I just want to make sure I’m sane.

#if 0
CI.createSourceManager();
CI.getSourceManager().createMainFileIDForMemBuffer(buffer);
CI.createFileManager();
#else
CI.createFileManager();
CI.createSourceManager(CI.getFileManager(), CI.getFileSystemOpts());
CI.getSourceManager().createMainFileIDForMemBuffer(buffer);
#endif

Thanks in advance

Garrison