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Revision tags: llvmorg-21-init, llvmorg-19.1.7, llvmorg-19.1.6
# 82c93b6f 06-Dec-2024 Akshay Deodhar <adeodhar@nvidia.com>

[SCEV] Simplify SCEVExpr for PHI to SCEV for operand if operands are identical (#115945)

Helps SCEV analyze some special phi nodes, allowing the computation of
loop trip count in cases like the fol

[SCEV] Simplify SCEVExpr for PHI to SCEV for operand if operands are identical (#115945)

Helps SCEV analyze some special phi nodes, allowing the computation of
loop trip count in cases like the following:

https://godbolt.org/z/xGs1d81TW

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