[PATCH] D137848: [ConstraintElimination] Add Decomposition class (NFCI)

[Nikita Popov via Phabricator via llvm-commits]

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Replace the vector of DecompEntry with a class that stores the constant offset separately. I think this is cleaner than giving the first element special handling.

This probably also fixes some potential ubsan errors by more consistently using addWithOverflow/multiplyWithOverflow.

Depends on D137847 <https://reviews.llvm.org/D137847>.


https://reviews.llvm.org/D137848

Files:
  llvm/lib/Transforms/Scalar/ConstraintElimination.cpp

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