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Author SHA1 Message Date
Richard Smith 5edd5830e1 Make preprocessor act in a GCC-compatible fashion when a macro is redefined 
within its own argument list. The original definition is used for the immediate
expansion, but the new definition is used for any subsequent occurences within
the argument list or after the expansion.

llvm-svn: 162906
 2012-08-30 13:38:46 +00:00
Richard Smith eb3ce7c3db Don't allow #include (and its friends #import, #include_next and 
#__include_macros) in the arguments of a function-style macro. Directives in the
arguments of such macros have undefined behaviour, and GCC does not correctly
support these cases. In some situations, this can lead to better diagnostics.

llvm-svn: 146765
 2011-12-16 22:50:01 +00:00