QIR-QIS

A compiler that validates and translates QIR (Quantum Intermediate Representation) to Quantinuum QIS (Quantum Instruction Set). This tool enables quantum programs written in QIR to run on Quantinuum's quantum computing systems.

Features

• QIR Validation: Validates QIR bitcode for correctness and spec compliance
• QIS Translation: Compiles QIR to Quantinuum's native QIS instruction set
• Python & Rust API: Use as a Rust library or Python package
• CLI Tool: Command-line interface for quick compilation

See qtm-qir-reference.md for details on supported QIR features and their mapping to Quantinuum QIS.

Installation

From Source (Rust)

Requirements:

• Rust >= 1.91.0
• LLVM 14

cargo build --release

The compiled binary will be available at target/release/qir-qis.

Python Package

Requirements:

• Python >= 3.10, < 3.15
• uv (recommended) or pip

Available pre-built wheels:

• Linux: x86_64 (manylinux_2_28), aarch64 (manylinux_2_28)
• macOS: x86_64, arm64 (Apple Silicon)
• Windows: x86_64

All wheels support Python 3.10+ using the stable ABI (abi3).

# Using uv (recommended)
uv pip install qir-qis

# Using pip
pip install qir-qis

For development installation:

uv sync

Usage

Command Line

Compile a QIR LLVM IR file to QIS bitcode:

# Basic usage
qir-qis input.ll

# With custom optimization level
qir-qis -O 3 input.ll

# Specify target architecture
qir-qis -t x86-64 input.ll

# Or using cargo
cargo run -- input.ll

This generates input.qis.bc containing the compiled QIS bitcode.

Python API

See examples/python_api.py for a complete working example.

uv run examples/python_api.py

For a more comprehensive example with quantum simulation, see main.py.

Rust API

See examples/rust_api.rs for a complete working example.

cargo run --example rust_api

Development

Setting Up Development Environment

# Clone the repository
git clone https://github.com/quantinuum/qir-qis.git
cd qir-qis

# Install Rust dependencies and build
cargo build

# Install Python dependencies
uv sync

Building

# Build Rust binary
cargo build --release

# Build Python package
uv run maturin build --release

Testing

Running Tests

Tests require cargo-nextest:

# Run all tests
make test

# Or directly with cargo
cargo nextest run --all-targets --all-features

Testing Individual Files

# Compile a single QIR file
make compile FILE=tests/data/adaptive.ll

# Compile all test files
make allcompile

Simulation Testing with Selene

Test the compiled QIS using Selene quantum simulator:

# Simulate a single file (runs 5 shots by default)
make sim FILE=tests/data/adaptive.ll

# Simulate all test files
make allsim

This will:

1. Compile the QIR to QIS
2. Run it on the Selene/Quest simulator
3. Display measurement results

Code Quality

# Run linters
make lint

# This runs:
# - prek (pre-commit checks, https://prek.j178.dev/)
# - typos checker
# - cargo clippy

Regenerating Python Stubs

After modifying the Python API:

make stubs

This updates qir_qis.pyi with the latest type signatures.

Project Structure

qir-qis/
├── src/
│   ├── main.rs          # CLI entry point
│   ├── lib.rs           # Library and Python bindings
│   ├── convert.rs       # QIR to QIS conversion logic
│   ├── decompose.rs     # Gate decomposition
│   ├── opt.rs           # LLVM optimization passes
│   └── utils.rs         # Helper utilities
├── tests/
│   ├── data/            # Test QIR files
│   └── snaps/           # Snapshot test results
├── main.py              # Example Python usage with simulation
├── Cargo.toml           # Rust package configuration
├── pyproject.toml       # Python package configuration
└── Makefile             # Common development tasks

Common Makefile Targets

Command	Description
make test	Run all unit and integration tests
make compile FILE=<path>	Compile a single QIR file
make sim FILE=<path>	Compile and simulate a QIR file
make lint	Run code quality checks
make stubs	Regenerate Python type stubs
make allcompile	Compile all test files
make allsim	Simulate all test files

Contributing

Contributions are welcome! Please read CONTRIBUTING.md for:

• How to report issues and submit pull requests
• Coding standards and commit message format
• Development workflow and testing requirements

Quick checklist before submitting:

• Tests pass: make test
• Linters pass: make lint
• Documentation updated

License

Apache-2.0

Copyright Quantinuum