Orlando Cazalet-Hyams 9459c8309c [KeyInstr][Clang] Add ApplyAtomGroup (#134632) ...

This is a scoped helper similar to ApplyDebugLocation that creates a new source
location atom group which instructions can be added to.

A source atom is a source construct that is "interesting" for debug stepping
purposes. We use an atom group number to track the instruction(s) that implement
the functionality for the atom, plus backup instructions/source locations.

This patch is part of a stack that teaches Clang to generate Key Instructions
metadata for C and C++.

RFC:
https://discourse.llvm.org/t/rfc-improving-is-stmt-placement-for-better-interactive-debugging/82668

The feature is only functional in LLVM if LLVM is built with CMake flag
LLVM_EXPERIMENTAL_KEY_INSTRUCTIONs. Eventually that flag will be removed.

2025-05-21 17:40:45 +01:00

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