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2020 Apr 02
3
RFC: dynamic_cast optimization in LTO
...quot;_blank">https://llvm.org/docs/TypeMetadata.html)</a> that is attached to the virtual function table (VFT) globals to answer this question.<br>For each VFT, the <font face="Default Monospace,Courier New,Courier,monospace">!type</font> MD lists the other VFTs that are "compatible" with it. In general, the VFT of a class B is considered to be "compatible" with the VFT of a class A, iff A derives (publicly or privately) from B.<br>This means that the VFT of a leaf class type is never compatible with any other VFT, and we use this...