[llvm] [DebugInfo] getMergedLocation: match scopes based on their location (PR #132286)

[Stephen Tozer via llvm-commits]

https://github.com/SLTozer commented:

Regarding the .ll tests - if possible, could you reduce them so that they contain the minimal input needed to test the expected behaviour? The most important part being the metadata imo - it's much easier to understand what the test is testing for when we only have the metadata entries that are relevant/necessary for the test, and only the instructions being merged have those DILocation attachments.

https://github.com/llvm/llvm-project/pull/132286