feat(op-acceptance-tests): add EIP-7939 CLZ opcode acceptance test#20073
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feat(op-acceptance-tests): add EIP-7939 CLZ opcode acceptance test#20073
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Add TestEIP7939CLZ to verify the CLZ opcode (0x1e) is available after the Karst fork and unavailable before it. The test uses eth_call with init code that computes CLZ(1) = 255, asserting an invalid opcode error pre-fork and the correct result post-fork. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Add TestEIP7939CLZ to verify the CLZ opcode (0x1e) is available after the Karst fork and unavailable before it. The test uses eth_call with init code that computes CLZ(1) = 255, asserting an invalid opcode error pre-fork and the correct result post-fork.
Stacked on #20073
For reference https://github.com/ethereum-optimism/design-docs/blob/main/protocol/fusaka-on-l2.md