llvm/circt

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

2226 stars · 504 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

CIRCT (Circuit IR Compilers and Tools) is an LLVM/MLIR-based infrastructure project for building hardware design compilers and tools. It provides modular intermediate representations and libraries for hardware description languages like Verilog, VHDL, and FIRRTL.

Use cases

• compile hardware description languages like Verilog and FIRRTL through MLIR-based IRs
• build custom EDA tools on reusable compiler infrastructure
• translate between hardware design formats and IRs
• analyze and transform circuit designs programmatically
• prototype new hardware compiler passes and dialects
• run SystemC and RTL-level design flows

When to choose

• you need modern, modular compiler infrastructure for hardware design
• you want to build custom tools on top of MLIR for circuits
• you are working with FIRRTL, Chisel, or SystemVerilog flows
• you need better location tracking and IR design than Verilog-based toolchains offer

When to avoid

• you need a mature, production-verified synthesis or simulation tool today
• you want a turnkey EDA suite rather than compiler libraries
• you are not comfortable with experimental, fast-moving LLVM/MLIR-based projects

Facets

framework · maturity active

compiler parser interpreter developer-tools compilers hardware developer-tools simulation windows cpp mlir llvm hardware-design eda verilog firrtl circuit-ir systemc linux macos

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markdown · JSON · MCP: product_card(name="llvm/circt")