[PATCH] D109124: [ARM] Implement target hook function to decide folding (mul (add x, c1), c2)

[Dave Green via Phabricator via llvm-commits]

dmgreen added a comment.

Could this use ConstantMaterializationCost from ARMBaseInstrInfo for the costs of materializing the constants? That way it should just work with any architecture or constants, with some simple checking for which will produce the lowest total cost. It might need to include isLegalAddImmediate too, but that should be handling Thumb and Arm already too.


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  https://reviews.llvm.org/D109124/new/

https://reviews.llvm.org/D109124