mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-26 11:36:06 +00:00
bea17ff652
Lifetime extended temporary objects that are bound to references with static storage duration may have external linkage and therefore require mangled symbol names. Clang uses an extension of the Microsoft ABI to give these symbols an implicit name of '$RT' followed by a discriminator and then mangles them similarly to the variable they are bound to. Clang's mangling scheme differs from the one used by MSVC. Previously, the `$RT<discriminator>` portion of the name was not registered as a back reference candidate and this resulted in incorrect back references for enclosing class and/or namespace scopes that might be referenced in the type of the object. This is an ABI change and has the potential to cause backward compatibility issues with previous Clang releases. Since MSVC uses a different mangling scheme, this change does not affect compatibility with MSVC. This fixes one of the name mangling concerns reported in #85423.