LLVM IR and Tooling

Purpose

Guide agents through LLVM as a user: generating and inspecting IR, running existing optimisation passes with opt, lowering to assembly with llc, and diagnosing missed optimisations. For writing new LLVM passes (PassPlugin, llvm-lit testing), use skills/compiler-internals/llvm-passes instead.

Triggers

• "Show me the LLVM IR for this function"
• "How do I run an LLVM optimisation pass?"
• "What does this LLVM IR instruction mean?"
• "How do I write a custom LLVM pass?"
• "Why isn't auto-vectorisation happening in LLVM?"

Workflow

1. Generate LLVM IR