[PATCH] D63932: [GlobalDCE] Dead Virtual Function Elimination

[Oliver Stannard (Linaro) via Phabricator via cfe-commits]

ostannard added a comment.

Without switching to `llvm.type.checked.load`, the optimisation would trigger in some cases where it shouldn't trigger, thus miscompiling the code. This is because it needs to know about _every_ virtual call site, if we lose the information about some of them then it will incorrectly think a virtual function is unused.


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  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D63932/new/

https://reviews.llvm.org/D63932