llvm-project

97885213 - [clang] Don't evaluate the initializer of constexpr-unknown parameters. (#142498)

[clang] Don't evaluate the initializer of constexpr-unknown parameters. (#142498) If we see a parameter of reference type that isn't part of the frame, don't try to evaluate its default argument. Just treat it as a constexpr-unknown value. Fixes #141114. Fixes #141858.