[PATCH] D56587: Fix sign/zero extension in Dwarf expressions.

[Markus Lavin via Phabricator via llvm-commits]

markus added a comment.

> If you choose this path, one way to solve the issue of what to do with the dangling types that are produced by the conversion operations would be to create them in a separate DICompileUnit with a compiler-generated name and location. This way the types should get uniqued automatically during LTO, and you don't need to worry about llvm-link & friends.

Not sure that I understand this comment right now. Perhaps I will run into the issue you describe later on but for now my mind is not there just yet :)

> What other DWARF5 operations do you have in mind that would need pointers into the debug type hierarchy?

For example I imagine that  DW_OP_regval_type, DW_OP_deref_type and DW_OP_const_type could come in handy to set the type of the expression stack. The "each element
of the stack is the size of an address on the target machine" of Dwarf4 is a rather annoying limitation for our target.


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  https://reviews.llvm.org/D56587/new/

https://reviews.llvm.org/D56587