Sam Parker fa8bff0cd1 [CostModel] Unify getArithmeticInstrCost ...

Add the remaining arithmetic opcodes into the generic implementation
of getUserCost and then call this from getInstructionThroughput. Most
of the backends have been modified to return the base implementation
for cost kinds other RecipThroughput. The outlier here is AMDGPU
which already uses getArithmeticInstrCost for all the cost kinds.
This change means that most of the opcodes can be removed from that
backends implementation of getUserCost.

Differential Revision: https://reviews.llvm.org/D80992

2020-06-10 09:08:45 +01:00

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