Enables or disables the optimization for multiple adjacent gather/scatter type vector memory references.
Linux: | -qopt-multiple-gather-scatter-by-shuffles -qno-opt-multiple-gather-scatter-by-shuffles |
macOS: | -qopt-multiple-gather-scatter-by-shuffles -qno-opt-multiple-gather-scatter-by-shuffles |
Windows: | /Qopt-multiple-gather-scatter-by-shuffles /Qopt-multiple-gather-scatter-by-shuffles- |
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When this option is not specified, the compiler uses default heuristics for optimization. |
This option controls the optimization for multiple adjacent gather/scatter type vector memory references. This optimization hint is useful for performance tuning. It tries to generate more optimal software sequences using shuffles.
If you specify this option, the compiler will apply the optimization heuristics. If you specify -qno-opt-multiple-gather-scatter-by-shuffles or /Qopt-multiple-gather-scatter-by-shuffles-, the compiler will not apply the optimization.
Optimization is affected by optimization compiler options, such as [Q]x, -march (Linux* and macOS*), and /arch (Windows*).
To override the effect of this option (or the default) per loop basis, you can use pragma vector [no]multiple_gather_scatter_by_shuffle.
Optimization Notice |
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Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice. Notice revision #20110804 |
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