Momchil Velikov c9b4dc3a81 [FuncSpec][NFC] Avoid redundant computations of DominatorTree/LoopInfo ...

The `FunctionSpecialization` pass needs loop analysis results for its
cost function. For this purpose, it computes the `DominatorTree` and
`LoopInfo` for a function in `getSpecializationBonus`.  This function,
however, is called O(number of call sites x number of arguments), but
the DominatorTree/LoopInfo can be computed just once.

This patch plugs into the PassManager infrastructure to obtain
LoopInfo for a function and removes ad-hoc computation from
`getSpecializatioBonus`.

Reviewed By: ChuanqiXu, labrinea

Differential Revision: https://reviews.llvm.org/D136332

2022-10-28 16:08:41 +01:00

7.5 KiB

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