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  1. Vectorization and Optimization Reports | Intel® Software

    https://software.intel.com/en-us/articles/vectorization-and-optimization-reports

    Sep 2, 2014 ... This chapter describes how to run and interpret Intel® C/C++ Compiler and Intel® Fortran Compiler vectorization and optimization reports.

  2. Getting the Most out of your Intel® Compiler with the New ...

    https://software.intel.com/en-us/articles/getting-the-most-out-of-your-intel-compiler-with-the-new-optimization-reports

    Oct 8, 2014 ... The Intel® Compiler's optimization report tells the programmer which ... starts with /Q. The switches are the same for both C/C++ and Fortran compilers. ... SIMD load instructions in a vectorized loop are most efficient when the ...

  3. New Vectorization Diagnostics starting from Intel® Fortran Compiler ...

    https://software.intel.com/en-us/articles/intel-fortran-15-vectorization-diagnostics

    Dec 27, 2016 ... To obtain a vectorization report use Intel® Fortran Compiler options: ... was not vectorized: compile time constraints prevent loop optimization.

  4. An Introduction to Vectorization with the Intel® Fortran Compiler

    https://software.intel.com/sites/default/files/An_Introduction_to_Vectorization_with_Intel_Fortran_Compiler_021712.pdf

    the Intel® Fortran Compiler will scale over systems using current and future Intel ... be built at default optimization settings (/O2 or -O2) or higher. Add the ...

  5. Getting Started with Intel Compiler Pragmas and Directives | Intel ...

    https://software.intel.com/en-us/articles/getting-started-with-intel-composer-xe-2013-compiler-pragmas-and-directives

    Aug 29, 2014 ... Fortran Directives: Compiler directives are special commands that ... Please read the presentation Vectorization: Pragma/Directive SIMD for an overview. ... The above are key optimization pragmas/directives with which every ...

  6. Data Alignment to Assist Vectorization | Intel® Software

    https://software.intel.com/en-us/articles/data-alignment-to-assist-vectorization

    With Fortran, the easiest way to get array data aligned is to use compiler option .... This information is part of the optimization report output from the compiler.

  7. Explicit Vector Programming in Fortran | Intel® Software

    https://software.intel.com/en-us/articles/explicit-vector-programming-in-fortran

    Jan 27, 2016 ... The auto-vectorizer can be more effective if the compiler is given hints .... a message appears in the 'loop' phase of the optimization report, ...

  8. What are PEEL and REMAINDER loops? (Fortran and C ...

    https://software.intel.com/en-us/articles/what-are-peel-and-remainder-loops-fortran-vectorization-support

    Oct 28, 2014 ... The vectorization component of the optimization report produced by the Intel® Compiler version 15 may contain remarks such as:

  9. Vectorization Resources for Intel® Advisor Users | Intel® Software

    https://software.intel.com/en-us/articles/advisor-vectorization-resources

    ... a Fortran mini-guide of vectorization-related, Intel compiler ... to Optimization with Intel® C++ and Fortran Compilers v16 ...

  10. Diagnostic 15532: Loop was not vectorized: compile time constraints ...

    https://software.intel.com/en-us/articles/fdiag15532

    Oct 29, 2014 ... Product Version: Intel(R) Visual Fortran Compiler XE 15.0 or a later ... was not vectorized: compile time constraints prevent loop optimization.

  11. Intel® Advisor | Intel® Software

    https://software.intel.com/en-us/intel-advisor-xe

    Vectorization Optimization and Thread Prototyping ... Intel Advisor sorts your loops by potential gain, makes compiler reports easier to read by showing messages on your source, and gives ... Add threading to C, C++, C#, and Fortran * code.

  12. Fortran Array Data and Arguments and Vectorization | Intel® Software

    https://software.intel.com/en-us/articles/fortran-array-data-and-arguments-and-vectorization

    The modern Fortran language has various types of arrays and an array ... In the case where compiler generates unit stride vectorized code, it is also very ...

  13. Vectorization Advisor-Windows* OS | Intel® Software

    https://software.intel.com/en-us/get-started-with-advisor-vectorization-windows

    Intel® Advisor offers a vectorization optimization tool and a threading design and ... Survey Report - Offers integrated compiler report data and performance data ... Visual Studio* IDE: Fortran > Optimization > Optimization > Maximize Speed or ...

  14. Diagnostic 15552: loop was not vectorized with "simd" | Intel ...

    https://software.intel.com/en-us/articles/fdiag13379

    Dec 15, 2016 ... The vectorization report generated using Intel® Fortran Compiler's optimization and vectorization report options includes non-vectorized loop ...

  15. Step by Step Performance Optimization with Intel® C++ Compiler ...

    https://software.intel.com/en-us/articles/step-by-step-optimizing-with-intel-c-compiler

    The compiler vectorization is a key point for most data ... can help you to do the fine-level performance optimization.

  16. vec-report, Qvec-report | Intel® Software

    https://software.intel.com/en-us/node/522949

    Tells the vectorizer to report on vectorized and non-vectorized loops. .... Python* Script for Annotating Intel C++ & Fortran Compilers Vectorization Reports, which  ...

  17. Diagnostic 15328 vectorization support:irregularly indexed load was ...

    https://software.intel.com/en-us/articles/fdiag15328

    Dec 27, 2016 ... The vectorization report generated using Intel® Fortran Compiler's ... An example below will generate the following remark in optimization ...

  18. Application Performance

    https://software.intel.com/sites/default/files/Compiler_QRG_2013.pdf

    Fine-tune performance to target IA-32 and Intel® 64-based systems with processor-specific options. .... For Fortran only: makes local arrays automatic and may ... code by the compiler vectorizer at optimization level –O2 or higher and asserts ...

  19. The Importance of Vectorization for Intel® Many Integrated Core ...

    https://software.intel.com/en-us/articles/the-importance-of-vectorization-for-intel-many-integrated-core-architecture-intel-mic

    Mar 26, 2013 ... For the Intel® Compiler, vectorization is the unrolling of a loop combined with the ... 1, ifort -openmp -offload-option,mic,compiler, "-vec-report2" ... this could be resolved by building with interprocedural optimization, -ipo , which ...

  20. Program Optimization through Loop Vectorization | Intel® Software

    https://software.intel.com/en-us/articles/program-optimization-through-loop-vectorization

    Jan 6, 2014 ... Download Article Download Program Optimization through Loop ... If you let the compiler vectorize (OpenMP, Intel Cilk Plus, ... Fortran programmers would use the following to assert that the address of A(1) is 64-byte aligned.

For more complete information about compiler optimizations, see our Optimization Notice.