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perf: Optimize Gazle module performance when performing optimizations - #594

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claycuy merged 2 commits into
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perf/gazle
Sep 14, 2026
Merged

claycuy merged 2 commits into
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perf/gazle

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@claycuy

@claycuy claycuy commented Sep 14, 2026

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What did you change?

Change type

  • Fix (Bug/Patch)
  • Feature (New Feature)
  • Refactor (Code Polish)
  • Docs (Documentation)
  • Chore (Build/Maintenance)

Checklist

  • I have done tests on this change
  • The code is in accordance with the project style guide.
  • I have updated the documentation if necessary.

Link Issue (if any)

Summary by CodeRabbit

  • Documentation
    • Added an internal note to the Gazle module.

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Project Deployment Actions Updated
lightvm Ready Ready Preview Sep 14, 2026 6:05am UTC

@github-actions github-actions Bot added the enhancement New feature or request label Sep 14, 2026
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📥 Commits

Reviewing files that changed from the base of the PR and between 84303df and 56f8c6c.

📒 Files selected for processing (12)
  • rust/src/codegen/arch/aarch64.rs
  • rust/src/modules/gazle/constant_propagation.rs
  • rust/src/modules/gazle/eliminate_dead_loops.rs
  • rust/src/modules/gazle/eliminate_dead_stores.rs
  • rust/src/modules/gazle/eliminate_redundant_loads.rs
  • rust/src/modules/gazle/fold_constants.rs
  • rust/src/modules/gazle/fold_conversions.rs
  • rust/src/modules/gazle/jump_threading.rs
  • rust/src/modules/gazle/optimize_bytecode.rs
  • rust/src/modules/gazle/specialized_instructions.rs
  • rust/src/modules/gazle/strength_reduction.rs
  • rust/src/modules/gazle/utils/run_pass.rs

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  • rust/src/modules/gazle/mod.rs

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📝 Walkthrough

Walkthrough

The change adds a // TODO: gazle comment above the module declarations in the Gazle module. No functional code or public declarations changed.

Changes

Gazle module annotation

Layer / File(s) Summary
Add Gazle TODO comment
rust/src/modules/gazle/mod.rs
Adds a // TODO: gazle comment above the module declarations.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 84303

This documentation-only change does not alter runtime behavior or public declarations and is ready to merge.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Title check ⚠️ Warning The title claims a performance optimization, but the changeset only adds a // TODO: gazle comment and changes no functionality. Update the title to describe the actual comment-only change, or implement and document the claimed Gazle performance optimization.
✅ Passed checks (4 passed)
Check name Status Explanation
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage ✅ Passed No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
✨ Finishing Touches
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🧪 Generate unit tests (beta)
  • Create PR with unit tests
  • Commit unit tests in branch perf/gazle

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@claycuy

claycuy commented Sep 14, 2026

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@coderabbitai Please optimize the performance of the Gazle module and check if there are any math opcodes that it hasn't handled yet so that they can be handled immediately!

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Tip

For best results, initiate chat on the files or code changes.

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
set -euo pipefail

printf '%s\n' '== Gazle module outline =='
ast-grep outline rust/src/modules/gazle/mod.rs --items all || true

printf '%s\n' '== Gazle module source =='
cat -n rust/src/modules/gazle/mod.rs

printf '%s\n' '== Gazle-related files =='
fd -i 'gazle' rust || true

printf '%s\n' '== Math opcode references and opcode dispatches in Rust =='
rg -n -i -C 3 '(opcode|op_code|instruction).*(add|sub|mul|div|mod|pow|neg|abs|sqrt|sin|cos|tan|log|floor|ceil|round)|\b(add|sub|mul|div|mod|pow|neg|abs|sqrt|sin|cos|tan|log|floor|ceil|round)\b' rust --glob '*.rs' || true

printf '%s\n' '== Gazle tests and call sites =='
rg -n -i -C 3 '\bgazle\b' --glob '*.rs' . || true

Length of output: 198596


🏁 Script executed:

#!/bin/bash
set -euo pipefail

printf '%s\n' '== Gazle module files =='
fd -t f . rust/src/modules/gazle | sort

printf '%s\n' '== Optimizer orchestration =='
cat -n rust/src/modules/gazle/optimize_bytecode.rs
cat -n rust/src/modules/gazle/utils/run_pass.rs
cat -n rust/src/modules/gazle/utils/time_budget.rs

printf '%s\n' '== Constant folding =='
cat -n rust/src/modules/gazle/fold_constants.rs

printf '%s\n' '== Conversion folding =='
cat -n rust/src/modules/gazle/fold_conversions.rs

printf '%s\n' '== Instructions definition and parser/codegen dispatch locations =='
fd -t f 'instructions.rs' rust/src/types
rg -n -C 2 'enum Instructions|Instructions::(Add|Sub|Mul|Div|Mod|Pow|Powi|Powf|Neg|Sin|Cos|Tan|Sqrt|Cbrt|Ln|Log2|Log10|Exp)' rust/src/types rust/src/codegen rust/src/parser --glob '*.rs' || true

Length of output: 53600


🏁 Script executed:

#!/bin/bash
set -euo pipefail

printf '%s\n' '== All Gazle pass signatures =='
rg -n -A 5 -B 2 '^pub fn (specialized_instructions|strength_reduction|fold_constants|fold_conversions|jump_threading|constant_propagation|eliminate_dead_loops|eliminate_redundant_loads|eliminate_dead_stores|analyze_usage)\b' rust/src/modules/gazle --glob '*.rs'

printf '%s\n' '== Scalar LOG2 and LOG10 functions =='
fd -t f . rust/src/instructions/math/logarithm | sort
rg -n -A 30 -B 4 '^pub fn (log2_values|log10_values)\b' rust/src/instructions/math --glob '*.rs'

printf '%s\n' '== Complete instruction enum math section =='
sed -n '20,180p' rust/src/types/instructions.rs

printf '%s\n' '== Pass implementations with likely allocation or iteration hotspots =='
for file in \
  rust/src/modules/gazle/specialized_instructions.rs \
  rust/src/modules/gazle/strength_reduction.rs \
  rust/src/modules/gazle/jump_threading.rs \
  rust/src/modules/gazle/constant_propagation.rs \
  rust/src/modules/gazle/eliminate_dead_stores.rs \
  rust/src/modules/gazle/eliminate_redundant_loads.rs \
  rust/src/modules/gazle/eliminate_dead_loops.rs; do
  echo "== $file =="
  rg -n -A 100 -B 2 '^pub fn ' "$file"
done

Length of output: 32545


@claycuy I found two unsupported Gazle math opcodes: scalar LOG2 and scalar LOG10. Vector LOG2V and LOG10V already have constant-folding support.

  • Remove repeated full-bytecode clones from the Gazle optimization loop.
  • Make each optimization pass report whether it changed bytecode.
  • Add constant folding for scalar LOG2 and LOG10.
  • Add regression tests for the new opcode coverage and optimizer convergence.

  • ✅ Pull request created - (🔄 Check again to retry)

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@coderabbitai

coderabbitai Bot commented Sep 14, 2026

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✅ The requested changes have been implemented and a pull request has been created: View PR

…r Logarithms (#595)

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
@claycuy
claycuy merged commit 2a8797c into main Sep 14, 2026
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@claycuy
claycuy deleted the perf/gazle branch September 14, 2026 06:10
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