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compiler-explorer-mcp

MCP.Pizza Chef: torshepherd

The compiler-explorer-mcp is an MCP server that integrates LLMs with the Compiler Explorer API, enabling real-time code compilation, exploration of compiler features, and detailed analysis of optimizations across multiple compilers and programming languages. It supports queries about compiler versions, feature support, and optimization effects, facilitating deep insights into compiler behavior and code performance.

Use This MCP server To

Compile code snippets across multiple compilers and languages Compare compiler feature support by version and vendor Analyze assembly output differences between optimization levels Explore compiler-specific handling of language features Investigate optimization impacts on code performance Demonstrate compiler behavior differences for language constructs Generate detailed reports on compiler flags and options

README

Compiler Explorer MCP

A Model Context Protocol (MCP) server that connects LLMs to the Compiler Explorer API, enabling them to compile code, explore compiler features, and analyze optimizations across different compilers and languages.

Example Questions

Here are some interesting questions you can ask your LLM using this MCP:

Compiler Feature Exploration

  • "What is the earliest version of GCC that supports the #embed directive?"
  • "Show me how different versions of Clang handle C++20 modules"
  • "What optimization flags are available in Clang 12 that weren't in Clang 11?"
  • "Can you demonstrate how MSVC and GCC handle C++20 coroutines differently?"

Optimization Analysis

  • "What's the assembly difference between -O2 and -O3 for a simple recursive Fibonacci function in GCC 13?"
  • "How does Clang's vectorization compare to GCC's for a basic matrix multiplication?"
  • "Show me how different optimization levels affect tail-call optimization in this recursive function"
  • "What's the impact of -ffast-math on this floating-point heavy computation?"

Language Feature Support

  • "Which C++20 features are supported in the latest versions of GCC, Clang, and MSVC?"
  • "Show me how different compilers implement std::optional's memory layout"
  • "Compare how GCC and Clang handle C++20's constexpr virtual functions"
  • "Demonstrate the differences in how Intel and GCC compilers auto-vectorize SIMD operations"

Assembly Deep Dives

  • "What's the most efficient way to implement a population count in x86 assembly across different CPU architectures?"
  • "Show me how different compilers optimize a simple string reverse function at -O3"
  • "Compare the assembly output of a virtual function call vs a normal function call"
  • "How do different compilers implement std::variant's type switching in assembly?"

Cross-Language Comparison

  • "Compare the generated assembly for the same algorithm in C++, Rust, and Go"
  • "How do exception handling mechanisms differ between C++ and Rust in terms of generated code?"
  • "Show me the overhead of Rust's bounds checking compared to unchecked C++ array access"
  • "Compare how C++ and D implement RAII in terms of generated assembly"

Performance Investigation

  • "What's the assembly-level difference between using std::sort and a hand-written quicksort?"
  • "Show me how different string concatenation methods compare in terms of generated instructions"
  • "Compare the efficiency of std::map vs std::unordered_map operations in assembly"
  • "How do different smart pointer implementations affect inlining and code size?"

compiler-explorer-mcp FAQ

How does compiler-explorer-mcp connect to the Compiler Explorer API?
It acts as an MCP server that interfaces directly with the Compiler Explorer API to fetch compilation results and compiler metadata.
Can I use compiler-explorer-mcp to compare different compiler versions?
Yes, it supports queries that compare features and optimizations across multiple compiler versions and vendors.
What programming languages does compiler-explorer-mcp support?
It supports all languages available in the Compiler Explorer API, including C, C++, Rust, and others.
How does this MCP server handle optimization analysis?
It compiles code with different optimization flags and compares the resulting assembly outputs to highlight differences.
Is real-time code compilation supported?
Yes, it provides real-time compilation and feedback through the Compiler Explorer API integration.
Can I query specific compiler features or flags?
Absolutely, you can ask about compiler flags, feature support, and version-specific capabilities.
Does compiler-explorer-mcp support multiple compilers simultaneously?
Yes, it can query and compare results from various compilers like GCC, Clang, and MSVC.
How secure is the interaction between the MCP server and the Compiler Explorer API?
The server follows MCP principles ensuring scoped, secure, and observable interactions with external APIs.