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Patch by Anders Waldenborg!

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e.g. for:

\define INVOKE(METHOD, CLASS) [CLASS METHOD]

void test2() {
  INVOKE(meth, MyClass);
}

Pointing at 'meth' will give a CXCursor_ObjCMessageExpr and pointing at 'MyClass'
will give a CXCursor_ObjCClassRef.

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If we pass it a source location that points inside a function macro argument,
the returned location will be the macro location in which the argument was expanded.
If a macro argument is used multiple times, the expanded location will
be at the first expansion of the argument.
 e.g.
   MY_MACRO(foo);
             ^
Passing a file location pointing at 'foo', will yield a macro location
where 'foo' was expanded into.

Make SourceManager::getLocation call getMacroArgExpandedLocation as well.

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[PCH] When writing out ExpansionInfo, make sure we don't lose track if it's a macro arg expansion or not.

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llvm/test/FrontendC++ and FileCheckize.

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[analyzer] teach ExprEngine about loads from static C++ class fields.  Fixes <rdar://problem/9948787>.

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[analyzer] Overhaul of checker registration in preparation for basic plugin support. Removes support for checker groups (we can add them back in later if we decide they are still useful), and -analyzer-checker-help output is a little worse for the time being (no packages).

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[analyzer] Enhance ConditionVisitor to handle arbitrary ValueDecls in binary expressions, and also handle inverting the order of comparison when the named decl appears on the RHS.

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...I believe it would not break anything...

FIXME: "check-all" may not be generated w/o LLVM_INCLUDE_TESTS.

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[analyzer] Enhance ConditionVisitor to understand eagerly evaluated (simple) binary conditions, and teach it to only focus on constraint changes.

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[analyzer] add ExprEngine::getEagerlyAssumedTags() to allow externally querying of "eagerly assumed" expressions.

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MacOSKeychainAPIChecker: The security API/memory leak checker should always generate regular nodes instead of sink nodes.

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