[PATCH] D112016: [IR] Introduce load assume operand bundle
Arthur Eubanks via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Oct 18 11:26:58 PDT 2021
aeubanks added a comment.
In D112016#3071078 <https://reviews.llvm.org/D112016#3071078>, @jdoerfert wrote:
>> This is useful for exposing the vtable value of a C++ object after its constructor without having to insert a load into the instruction stream.
>
> Why is an assume better than a load?
Adding an extra load will affect cost modelling, e.g. inliner thresholds, and other various ad-hoc cost heuristics. assumes are free.
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https://reviews.llvm.org/D112016/new/
https://reviews.llvm.org/D112016
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