[PATCH] D128863: Add switch to use "source_file_name" instead of Module ID for globally promoted local

[Teresa Johnson via Phabricator via llvm-commits]

tejohnson added a comment.

> During LTO a local promoted to a global gets a unique suffix based partially on the Module's ID.

The hash is actually a hash of the full module IR, computed when we write out the bitcode before the ThinLTO link, saved in the bitcode file, then read into a table indexed by module Id.

> This has a problem, because the Module ID is not the same as the original Module ID.

Can you clarify what the different module IDs you are comparing here?


Repository:
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  https://reviews.llvm.org/D128863/new/

https://reviews.llvm.org/D128863