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Commit a6acb390 authored by Devang Patel's avatar Devang Patel
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Handle corner case where clang-cc is invoked directly to compile preprocessed... 

Handle corner case where clang-cc is invoked directly to compile preprocessed source file without -main-file-name. In this case, CDDebugInfo is not able identify correct main source file becase SM.isFromMainFile() returns true for locations from header files as well as locations from main source file.
This patch takes conservative approach by not emitting more then one compile unit with isMain bit set.

llvm-svn: 69902
parent 466af3eb
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