perf(evm): reuse CFG memory proofs for COPY expansion - #580
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Teach the guaranteed-memory analysis to learn constant CALLDATACOPY and CODECOPY destination ends. Keep zero-length copies from strengthening the proof and ignore non-memory source ranges.
Bind COPY helper lowering to the analyzed opcode PC and skip CALLDATACOPY and CODECOPY expansion IR only when the propagated destination range is fully covered. Keep fallback expansion for uncovered ranges and add MIR-level regression coverage plus deterministic logging telemetry.
⚡ 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 |
This was referenced Jul 28, 2026
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1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):
2. What is the scope of this PR (e.g. component or file name):
src/compiler/evm_frontend/evm_memory_analysis.hsrc/compiler/evm_frontend/evm_mir_compiler.{h,cpp}src/tests/evm_jit_frontend_tests.cpp3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):
Propagate constant
CALLDATACOPYandCODECOPYdestination ends through the existing CFG guaranteed-minimum-memory analysis. During multipass lowering, bind helper operations to their analyzed opcode PC and omit the COPY memory-expansion IR only when the propagated proof fully covers the constant destination range. Dynamic, zero-size, overflow, and uncovered ranges retain the existing normalization and expansion path; copy gas charging and helper ordering are unchanged.This keeps fact production and proof consumption separate:
perf(evm): propagate COPY destination guarantees through CFGperf(evm): reuse CFG memory proofs for COPY expansionStatic lowering telemetry provides an opportunity check rather than a runtime speedup claim:
4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):
5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:
Added analysis tests for constant
CALLDATACOPY/CODECOPYdestination facts and zero-size rejection. Added lowering tests that verify cross-block proof reuse at the exact opcode PC and inspect MIR calls to ensure uncovered COPY operations retain fallback expansion while a covered successor does not add another expansion.Validation:
./tools/format.sh format./tools/format.sh checkevmJitFrontendTests: 113/113 passedevmDifferentialTests: 65/65 passedstd::experimental::filesystemlinkage issue.6. Release note