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| git_commit |
commit adeae925dcd7db0d49256f687c66a662d6604128 Author: David Benjamin <davidben@google.com> Date: Tue Sep 17 11:22:27 2024 -0400 [libc++] Make _LIBCPP_ASSUME usable when it is appropriate (#91801) libc++ turned off _LIBCPP_ASSUME because turning every debug assert into __builtin_assume tripped [1]. However, this means we can't use _LIBCPP_ASSUME when there is a clear optimization intent. See [2] for discussion of a place where _LIBCPP_ASSUME would be valuable. This patch fixes this by not undefining the definition of _LIBCPP_ASSUME and making sure that we don't attempt to `_LIBCPP_ASSSUME` every assertion in the library. [1]: https://discourse.llvm.org/t/llvm-assume-blocks-optimization/71609 [2]: https://github.com/llvm/llvm-project/pull/78929#issuecomment-1936582711 |