Intel® oneAPI DPC++/C++ Compiler Developer Guide and Reference

ID 767253
Date 3/31/2023
Public

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Document Table of Contents

fiopenmp, Qiopenmp

Enables recognition of OpenMP* features, such as parallel, simd, and offloading directives. This is an alternate option for compiler option [Q or q]openmp.

Syntax

Linux:

-fiopenmp

Windows:

/Qiopenmp

Arguments

None

Default

OFF

If this option is not specified, OpenMP* features are not transformed in LLVM*.

Description

This option enables recognition of OpenMP* features, such as parallel, simd, and offloading directives. This is an alternate option for compiler option [Q or q]openmp.

The -fiopenmp and /Qiopenmp options enable Intel's implementation of OpenMP* in the compiler back end. The compiler front end produces an intermediate representation that preserves the parallelism exposed by OpenMP* directives. The back end uses the exposed parallelism to do more advanced optimizations, such as SIMD vectorization.

NOTE:

To enable offloading to a specified GPU target, you must also specify option fopenmp-targets (Linux*) or /Qopenmp-targets (Windows).

NOTE:

Option -fopenmp is not the same as option -fiopenmp. Option -fopenmp will not do offloading.

Product and Performance Information

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.

Notice revision #20201201

IDE Equivalent

Visual Studio: DPC++ > Language > OpenMP Support

C/C++ > Language [Intel C++] > OpenMP Support

Intel(R) oneAPI DPC++ Compiler > Language > OpenMP Support

Intel C++ Compiler > Language > OpenMP Support

Eclipse: Intel(R) oneAPI DPC++ Compiler > Language > OpenMP Support

Intel C++ Compiler > Language >  OpenMP Support

Alternate Options

Linux: -qopenmp

Windows: /Qopenmp

See Also