[PATCH] D126224: Add DWARF string debug to clang release notes.

[Paul Robinson via Phabricator via cfe-commits]

probinson added a comment.

In D126224#3532769 <https://reviews.llvm.org/D126224#3532769>, @dblaikie wrote:

> While the string would be deduplicated, the offset in the DIEs (or index in DWARFv5, plus offset in .debug_str_offsets) for each of these strings would not. But perhaps that would still be low-cost enough (if we were getting really fancy, we could bake that string offset/index into the abbreviation - though we probably don't have the infrastructure in LLVM's DWARF emission to do that super easily)

DWARF doesn't have a way to encode a section offset into .debug_abbrev.  Best you could do (for v5 and up) is pin the string-literal variable name to .debug_str_offsets index 0, which keeps the .debug_info overhead to one byte for DW_FORM_strx1.


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