[cfe-dev] CompilerInstance::createSourceManager()

[Garrison Venn]

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
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