Author: dgregor
Date: Mon Mar 22 16:28:29 2010
New Revision: 99215
URL: http://llvm.org/viewvc/llvm-project?rev=99215&view=rev
Log:
Comment the reasons for the strange little dance we do with the main file name
for debug information
Modified:
cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
Modified: cfe/trunk/lib/CodeGen/CGDebugInfo.cpp
URL:
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGDebugInfo.cpp?rev=99215&r1=99214&r2=99215&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGDebugInfo.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGDebugInfo.cpp Mon Mar 22 16:28:29 2010
@@ -112,6 +112,10 @@
llvm::sys::Path AbsFileName(MainFileName);
AbsFileName.makeAbsolute();
+ // The main file name provided via the "-main-file-name" option contains just
+ // the file name itself with no path information. This file name may have had
+ // a relative path, so we look into the actual file entry for the main
+ // file to determine the real absolute path for the file.
std::string MainFileDir;
if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID()))
MainFileDir = MainFile->getDir()->getName();
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