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* Fix -Wunused-comparison for comparisons in arguments to function-like macros.Matt Beaumont-Gay2013-01-121-2/+4
| | | | | | | | | | | Previously, -Wunused-comparison ignored comparisons in both macro bodies and macro arguments, but we would still emit a -Wunused-value warning for either. Now we correctly emit -Wunused-comparison for expressions in macro arguments. Also, add isMacroBodyExpansion to SourceManager, to go along with isMacroArgExpansion. llvm-svn: 172279
* Suppress -Wunused-value within macros from system headers.Matt Beaumont-Gay2012-01-061-0/+10
Along the way, move a helper function from SemaChecking.cpp to a more accessible home in SourceManager. llvm-svn: 147692
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