[clang] [clang] [CodeGen] fix crash when Ty isDependentType in CodeGenFunction::EmitAutoVarAlloca (PR #135643)

[Eli Friedman via cfe-commits]

https://github.com/efriedma-quic requested changes to this pull request.

Even if this fixes the crash, the resulting code likely won't work; we need to compute the type to emit correct code.

The underlying issue is probably an issue with template instantiation (clang/lib/Sema). When a template is instantiated, all the depending types are supposed to be transformed into non-dependent types.  But there are occasionally bugs where this sort of issue slips through.

Please file a bug with a testcase (see https://llvm.org/docs/HowToSubmitABug.html)

https://github.com/llvm/llvm-project/pull/135643