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* Add self-comparison warnings for fields.Eli Friedman2013-09-061-0/+12
This expands very slightly what -Wtautological-compare considers to be tautological to include implicit accesses to C++ fields and ObjC ivars. I don't want to turn this into a full expression-identity check, but these additions seem pretty well-contained, and maintain the theme of checking for "x == x". <rdar://problem/14431127> llvm-svn: 190118
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