Chris Lattner a30be59fa2 Fix a nasty corner case that Neil noticed in PR1900, where we would ...

incorrectly apply the multiple include optimization to files with 
guards like:

#if !defined(x) MACRO

where MACRO could expand to different things in different contexts.
Thanks Neil!

llvm-svn: 45716

2008-01-07 19:50:27 +00:00

91 KiB

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