[llvm] ConstraintSystem: replace data structure with Matrix (PR #98895)

[Jakub Kuderski via llvm-commits]

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+//===- Matrix.h - Two-dimensional Container with View -----------*- C++ -*-===//
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kuhar wrote:

I'd strongly prefer this option then. Also, please do not click 'resolve' on conversations that haven't been resolved.

https://github.com/llvm/llvm-project/pull/98895