I'm working to fully remove this method, but because it's
used and/or implemented in a few places, I'm backing it out
incrementally. This just changes the abstract method so I can
delete the implementors in a subsequent PR without breaking
anything.
without relying on spare bit information in the reflection metadata
(which was added in #40906). As a result, we can remove the
code from #40906.
This is the first step in such removal. It removes the RemoteMirror
code for looking up such metadata. It leaves behind:
* Sufficient stubs for LLDB to continue to build. Once LLDB is updated, these stubs can be removed as well.
* The compiler code to emit such metadata. This allows new binaries to still reflect MPEs on older runtimes. This will need to be kept for a transitional period.
This is a follow up patch that allows for external DescriptorFinders to
provide MultiPayloadEnumDescriptors (this is done to support embedded
Swift debugging, which encodes the equivalent of Swift metadata as
DWARF).
Currently, TypeRefBuilder knows how to parse type descriptors from
reflection metadata. We aim to store the same information that lives
in type descriptors externally, as an effort to support embedded Swift
debugging. In order to take advantage of all of the existing type
information parsing code that exists today in remote mirrors, add an
interface for external lookup of type descriptors, and replace all the
usages of type descriptors with their generic counterpart (this patch
only adds support for builtin descriptors, but follow up patches will
add support for other descriptor types).
