Intel® Fortran Compiler 17.0 Developer Guide and Reference
Enables or disables vectorization.
Linux and macOS: | -vec -no-vec |
Windows: | /Qvec /Qvec- |
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-vec |
Vectorization is enabled if option O2 or higher is in effect. |
This option enables or disables vectorization.
To disable vectorization, specify -no-vec (Linux* and OS X*) or /Qvec- (Windows*).
To disable interpretation of SIMD directives, specify -no-simd (Linux* and OS X*) or /Qsimd- (Windows*).
To disable all compiler vectorization, use the "-no-vec -no-simd" (Linux* and OS X*) or "/Qvec- /Qsimd-" (Windows*) compiler options. The option -no-vec (and /Qvec-) disables all auto-vectorization, including vectorization of array notation statements. The option -no-simd (and /Qsimd-) disables vectorization of loops that have SIMD directives.
Using this option enables vectorization at default optimization levels for both Intel® microprocessors and non-Intel microprocessors. Vectorization may call library routines that can result in additional performance gain on Intel microprocessors than on non-Intel microprocessors. The vectorization can also be affected by certain options, such as /arch (Windows), -m (Linux and OS X), or [Q]x.
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