https://bugs.llvm.org/show_bug.cgi?id=40575
Bug ID: 40575
Summary: std::copy to memmove optimisation seems to not work.
Product: libc++
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: All Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: denis.yaroshevs...@gmail.com
CC: llvm-bugs@lists.llvm.org, mclow.li...@gmail.com
std::copy has an optimization to memmove but it doesn't seem to work:
https://gcc.godbolt.org/z/a6lvSm (no memmove)
I has real consequences:
libstdc++: http://quick-bench.com/vpLxYCWfverSzlWxFjwuXxELD8Q
libc++: http://quick-bench.com/kfsPjkSo79hHiy0ZVrMCn7wU6Xw
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