Richard Smith a271686ce2 PR30937: don't devirtualize if we find that the callee is a pure virtual ...

function. In that case, there is no requirement that the callee is actually
defined, and the code may in fact be valid and have defined behavior if the
virtual call is unreachable.

llvm-svn: 286534

2016-11-11 01:01:31 +00:00

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