Intel C++ Compiler

Intel C++ Compiler
Name	Intel C++ Compiler
Developer	Intel
Released	0 1999
Latest release version	2021.7.0
Latest release date	15 December 2023
Programming language	C++, C
Operating system	Windows, Linux, macOS
Genre	Compiler
License	Proprietary; free versions available
Website	https://www.intel.com/content/www/us/en/developer/tools/oneapi/compiler.html

Intel C++ Compiler. It is a proprietary compiler developed by Intel for the C and C++ programming languages, designed to produce highly optimized code for x86 and x86-64 microprocessor architectures. The compiler is a core component of the Intel oneAPI toolkits and is widely used in high-performance computing, scientific computing, and commercial software development where maximum performance on Intel hardware is critical. It is known for its advanced optimization techniques, support for modern language standards, and deep integration with other Intel development tools.

Overview

The compiler targets a range of operating systems including Windows, Linux, and macOS, generating machine code for Intel and compatible AMD processors. It is often utilized in environments like the Texas Advanced Computing Center and national laboratories such as Lawrence Livermore National Laboratory for building critical applications. As part of the Intel Parallel Studio XE and later the Intel oneAPI Base Toolkit, it works in concert with tools like the Intel VTune Profiler and Intel Advisor to streamline the development workflow. Its output is frequently benchmarked against other compilers like the GNU Compiler Collection and Clang.

History and development

Originally introduced in the late 1990s, the compiler evolved from technology acquired from companies like Kuck & Associates and has been integral to the performance of software on the Pentium 4 and subsequent architectures. A significant milestone was its role in optimizing applications for the Intel Xeon Phi coprocessor. The development strategy shifted with the launch of the Intel oneAPI initiative, which aimed to provide a unified programming model across diverse hardware, including Intel Xe graphics. Key figures in its evolution have included engineers from Intel Labs and contributions from the broader HPC community at events like the International Supercomputing Conference.

Features and capabilities

The compiler provides advanced features such as automatic vectorization, OpenMP support for parallel computing, and Intel MKL directives for mathematical routines. It includes proprietary pragmas and intrinsic functions to leverage specific instruction sets like SSE, AVX-512, and AVX. For heterogeneous computing, it supports the Data Parallel C++ language extensions as part of SYCL. Its interprocedural optimization and profile-guided optimization capabilities are particularly noted for improving the performance of large-scale applications, such as those run on the TOP500 supercomputers.

Compatibility and standards support

It maintains a high degree of compatibility with the GNU Compiler Collection and Microsoft Visual C++, allowing it to process codebases originally written for those compilers. The compiler supports modern C++ standards including C++11, C++14, C++17, and elements of C++20, as defined by the ISO and the C++ Standards Committee. It also adheres to the OpenMP Application Programming Interface specifications and supports the Linux Standard Base. This standards compliance ensures it can compile major projects like the Linux kernel and applications from the Apache Software Foundation.

Performance and optimization

Renowned for generating fast executable code, the compiler employs sophisticated algorithms for loop optimization, cache blocking, and multithreading tailored to Intel Core and Intel Xeon processors. It often outperforms other compilers in benchmarks conducted by organizations like the SPEC and on workloads from fields such as computational fluid dynamics and financial modeling. The profile-guided optimization feature allows developers to refine performance based on real execution profiles, a technique critical for applications deployed on systems at the National Center for Supercomputing Applications.

Integration and tooling

It integrates seamlessly with major integrated development environments such as Microsoft Visual Studio, Eclipse, and CLion. The compiler is a foundational element of the Intel oneAPI toolkits, which include the Intel DPC++ Compiler, Intel Distribution for Python, and debugging tools like Intel Inspector. This ecosystem supports the entire development lifecycle, from code editing and building to profiling and debugging, and is used by corporations like Samsung and research institutions like the Max Planck Society for complex software projects.

Licensing and availability

The compiler is available under a traditional proprietary license as part of commercial Intel oneAPI toolkits, but Intel also offers free versions, including the Intel oneAPI Base Toolkit for community and academic use. It has been distributed through channels like the Microsoft Store and package managers for Linux such as APT and YUM. Licensing models have evolved, with historical versions bundled in products like Intel Parallel Studio XE, and current offerings aligned with the oneAPI specification promoted by the oneAPI initiative consortium.

Category:Intel software Category:C compilers Category:C++ compilers Category:Proprietary compilers