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EIP-2315 Simple Subroutines for the EVM

WithdrawnCorecreated 2019-10-171 later proposal build on itrequires EIP-3540, EIP-3670, EIP-4200

Two opcodes for efficient, safe, and static subroutines.

Authors: Greg Colvin (@gcolvin), Martin Holst Swende (@holiman), Brooklyn Zelenka (@expede), John Max Skaller

Depends on (3)

Proposals this one names in its requires field.

EIP-3540EOF - EVM Object Format v1EIP-3670EOF - Code ValidationEIP-4200EOF - Static relative jumps

Built on by (1)

Later proposals that name this one in their requires field.

EIP-4573Procedures for the EVM

What the specification covers

AbstractMotivationA complete control-flow facility.Efficient control-flow.Safe control-flow.Static control-flow.SpecificationOpcodesRJUMPSUB (0x5f) relative_offsetRETURNSUB (0x5e)ValidityStatic Constraints on Valid CodeRationaleValidationAlternative DesignsWe prefer the dedicated return stack.EfficiencySimple Subroutine CallTail Call Optimizationreturns true iff code is valid

This proposal declares no Solidity interface, so there is nothing to compute. It may be a core protocol change, a meta proposal, or written in prose only.

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