Sirui Mu c9d475c937 [libc++abi] Improve performance of __dynamic_cast ... The original `__dynamic_cast` implementation does not use the ABI-provided `src2dst_offset` parameter which helps improve performance on the hot paths. This patch improves the performance on the hot paths in `__dynamic_cast` by leveraging hints provided by the `src2dst_offset` parameter. This patch also includes a performance benchmark suite for the `__dynamic_cast` implementation. Reviewed By: philnik, ldionne, #libc, #libc_abi, avogelsgesang Spies: mikhail.ramalho, avogelsgesang, xingxue, libcxx-commits Differential Revision: https://reviews.llvm.org/D138005		2023-03-19 10:04:34 +01:00
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dynamic_cast.bench.cpp