[llvm] [mlir] [OMPIRBuilder][debug] Fix debug info for variables in target region. (PR #118314)

[Sergio Afonso via llvm-commits]

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skatrak wrote:

This is a current limitation also for clang (https://github.com/llvm/llvm-project/issues/62099). The issue is that it tries to use the name of the file to produce the outlined function's name for the target region, and it has no fallback.

https://github.com/llvm/llvm-project/pull/118314