Martijn Vels 7ba045a430 Make basic_string::operator=() tail call properly ...

Summary: We discovered that the compiler may chose not to inline the operator=, which leads to an expensive extra stack frame. This change makes __assign_no_alias always tail called.

Reviewers: EricWF, #libc!

Subscribers: libcxx-commits

Tags: #libc

Differential Revision: https://reviews.llvm.org/D77913

2020-04-10 19:41:46 -04:00

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