LLVM Backend Skill

Overview

Expert skill for LLVM integration including IR generation, optimization passes, and native code emission.

Capabilities

• Generate LLVM IR from high-level AST/IR
• Configure and run LLVM optimization passes
• Implement custom LLVM passes
• Handle LLVM type system mapping
• Generate debug information (DWARF)
• Configure target machine and code generation options
• Implement LLVM JIT (ORC, MCJIT) integration
• Handle cross-compilation target triples

Target Processes

• code-generation-llvm.js
• jit-compiler-development.js
• debugger-adapter-development.js
• ir-design.js

Dependencies

• LLVM C++ API
• llvm-sys bindings
• Inkwell (Rust LLVM bindings)

Usage Guidelines

1. Type Mapping: Establish clear mapping between source types and LLVM types
2. SSA Form: Leverage LLVM's SSA form; generate clean IR and let LLVM optimize
3. Debug Info: Generate debug info from the start using DIBuilder
4. Optimization Levels: Test with -O0 first, then enable optimizations incrementally
5. Target Configuration: Abstract target-specific code behind target triple configuration

Output Schema

{
  "type": "object",
  "properties": {
    "llvmVersion": { "type": "string" },
    "targetTriple": { "type": "string" },
    "optimizationLevel": {
      "type": "string",
      "enum": ["O0", "O1", "O2", "O3", "Os", "Oz"]
    },
    "passes": {
      "type": "array",
      "items": { "type": "string" }
    },
    "generatedFiles": {
      "type": "array",
      "items": { "type": "string" }
    }
  }
}