[llvm] [CodeGen] Allow multiple location for the same CSR. (PR #168531)

[Philip Reames via llvm-commits]

preames wrote:

Noting for the record that this PR has failing tests in CI:
2025-11-18T15:37:09.7820406Z Failed Tests (6):
2025-11-18T15:37:09.7820684Z   LLVM :: CodeGen/X86/cfi-inserter-callee-save-register-2.mir
2025-11-18T15:37:09.7821049Z   LLVM :: CodeGen/X86/cfi-inserter-callee-save-register.mir
2025-11-18T15:37:09.7821424Z   LLVM :: CodeGen/X86/cfi-inserter-verify-inconsistent-loc.mir
2025-11-18T15:37:09.7821763Z   LLVM :: CodeGen/X86/segmented-stacks-dynamic.ll
2025-11-18T15:37:09.7822103Z   LLVM :: CodeGen/X86/segmented-stacks.ll
2025-11-18T15:37:09.7822379Z   LLVM :: DebugInfo/MIR/X86/no-cfi-loc.mir

Until that's addressed, I don't plan to look at it further.

https://github.com/llvm/llvm-project/pull/168531