Chris Lattner 4fa23625ab Check in the long promised SourceLocation rewrite. This lays the ...

ground work for implementing #line, and fixes the "out of macro ID's" 
problem.

There is nothing particularly tricky about the code, other than the
very performance sensitive SourceManager::getFileID() method.

llvm-svn: 62978

2009-01-26 00:43:02 +00:00

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