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[libc++] Clarify how we pick the typeinfo comparison

Authored by ldionne on Nov 16 2020, 3:13 PM.

Description

[libc++] Clarify how we pick the typeinfo comparison

This commit makes it clear that the typeinfo comparison implementation
is automatically selected by default, and that the CMake option only
overrides the value. This has been a source of confusion and bugs ever
since we've introduced complexity in that area, so I'm trying to simplify
it while still allowing for some control on the implementation.

Differential Revision: https://reviews.llvm.org/D91574

Details

Committed
ldionneNov 18 2020, 1:58 PM
Differential Revision
D91574: [libc++] Simplify how we pick the typeinfo comparison
Parents
rG5349f99114cf: [flang] Correct handling of null pointer initializers
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