perf(evm): reuse CFG memory proofs for RETURN and REVERT - #584
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zoowii merged 2 commits intoJul 29, 2026
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Record RETURN and REVERT helper PCs after closing their source block so later lowering can query the exact per-op memory facts. Previously handleEndBlock cleared the current memory opcode identity before the terminating helper was lowered.
Let RETURN and REVERT reuse guaranteed memory-size facts produced by the CFG analysis when their constant output range is already covered. Previously both terminators emitted another expansion check even after a predecessor had established the same range; dynamic, uncovered, overflow-prone, and zero-size cases keep the existing fallback semantics.
⚡ Performance Regression Check Results✅ Performance Check Passed (interpreter)Performance Benchmark Results (threshold: 25%)
Summary: 194 benchmarks, 0 regressions ✅ Performance Check Passed (multipass)Performance Benchmark Results (threshold: 25%)
Summary: 193 benchmarks, 0 regressions |
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1. Does this PR affect any open issues?(Y/N) and add issue references:
2. What is the scope of this PR:
EVM multipass JIT memory expansion analysis and lowering:
src/action/evm_bytecode_visitor.hsrc/compiler/evm_frontend/evm_mir_compiler.{h,cpp}3. Provide a description of the PR:
Reuse CFG-derived guaranteed memory prefixes when lowering constant-range
RETURNandREVERToperations in the multipass JIT.expandMemoryIRonly when a constant non-empty range is covered bygetGuaranteedMinBytesBeforeOpOn the existing 65-contract on-chain corpus, compiled paths report 401 eliminated expansion IR sites across 30 contracts: 24 for
RETURNand 377 forREVERT.4. Are there any breaking changes?(Y/N):
5. Are there test cases for these changes?(Y/N):
Validation:
./tools/format.sh format./tools/format.sh checkevmJitFrontendTests: 111/111 passedevmDifferentialTests: 26/26 passed, including output/status/gas equivalence and zero-size high-offset cases6. Release note