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2013-04-26Add r180263 back, but fix hasBraces() to be correct during parsing.Rafael Espindola
Original commit message: Fix a case in linkage computation that should check for single line extern "C". git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180591 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-25Revert r180263. It's causing failures.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180583 91177308-0d34-0410-b5e6-96231b3b80d8
2013-04-25Fix a case in linkage computation that should check for single line extern "C".Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180263 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-14When marking derived classes' virtual methods ODR-used in order to triggerNick Lewycky
instantiation in order to permit devirtualization later in codegen, skip over pure functions since those can't be devirtualization targets. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175116 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-12The meat of this patch is in BuildCXXMemberCalLExpr where we make it useNick Lewycky
MarkMemberReferenced instead of marking functions referenced directly. An audit of callers to MarkFunctionReferenced and DiagnoseUseOfDecl also caused a few other changes: * don't mark functions odr-used when considering them for an initialization sequence. Do mark them referenced though. * the function nominated by the cleanup attribute should be diagnosed. * operator new/delete should be diagnosed when building a 'new' expression. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174951 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-07Apply the pure-virtual odr rule to other constructs which can call overloadedNick Lewycky
operators. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174584 91177308-0d34-0410-b5e6-96231b3b80d8
2013-02-02This patch makes "&Cls::purevfn" not an odr use. This isn't what the standardNick Lewycky
says, but that's a defect (to be filed). "Cls::purevfn()" is still an odr use. Also fixes a bug that caused us to not mark the function referenced just because we didn't want to mark it odr used. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174242 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-31Fix ODR-use of a MemberExpr to check before marking a pure function used. RemoveNick Lewycky
a workaround for this bug from the -Wundefined-internals warning. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174020 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-29Don't warn for undefined but used decls that are external because of a typedef.Rafael Espindola
This fixes pr14736. It is fairly ugly, but I don't think we can do much better as we have to wait at least until the end of the typedef to know if the function will have external linkage or not. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171240 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-08Make sure template argument deduction is consistently performed in an ↵Eli Friedman
unevaluated context. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150049 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-04Suppress the used-but-not-defined warning for static data members while I ↵Eli Friedman
look into a rather nasty bug in the new odr-use marking code. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149731 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-02Add some code to accurately perform odr-used marking for variables per the ↵Eli Friedman
C++11 rules. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149641 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-25Rough fix for PR9323 that prevents Clang from marking copy constructorChandler Carruth
declarations as referenced when in fact we're not going to even form a call in the AST. This is significant because we attempt to allow as an extension classes with intentionally private and undefined copy constructors to have temporaries bound to references, and so shouldn't warn about the lack of definition for that copy constructor when the class is internal. Doug, John wasn't really satisfied with the presence of overloading at all. This is a stop-gap and there may be a better solution. If you can give me some hints for how you'd prefer to see this solved, I'll happily switch things over. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126480 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-21Don't warn about static const integral data members with in-line constantJohn McCall
initializers just because they don't have a proper out-of-line definition. Such code is technically ill-formed but is too common and too unlikely to be a problem to be seriously worth worrying about. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126137 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19Warn about code that uses variables and functions with internal linkageJohn McCall
without defining them. This should be an error, but I'm paranoid about "uses" that end up not actually requiring a definition. I'll revisit later. Also, teach IR generation to not set internal linkage on variable declarations, just for safety's sake. Doing so produces an invalid module if the variable is not ultimately defined. Also, fix several places in the test suite where we were using internal functions without definitions. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@126016 91177308-0d34-0410-b5e6-96231b3b80d8