iss: Add strategy analysis infrastructure #957
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Adds the infrastructure for instruction analysis. It obtains facts about an instruction, and strategy evaluators use them to decide whether its strategy is viable for the given instruction.
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Adds the infrastructure for instruction analysis. It obtains facts about an instruction, and strategy evaluators use them to decide whether its strategy is viable for the given instruction.
This PR does not yet change the vector emission behavior, but adds the analysis foundation. Raw, fixed vector operations like VADD in RISC-V are now classified as gvec viable instruction.
While this implementation tries to be future proof and extendable for more complex vector patterns, odds are high that this will be heavily refactored in the near future.