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

ID 767253
Date 3/22/2024
Public

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Document Table of Contents

qopt-mem-layout-trans, Qopt-mem-layout-trans

Controls the level of memory layout transformations performed by the compiler.

Syntax

Linux:

-qopt-mem-layout-trans[=n]

-qno-opt-mem-layout-trans

Windows:

/Qopt-mem-layout-trans[:n]

/Qopt-mem-layout-trans-

Arguments

n

Is the level of memory layout transformations. Possible values are:

0

Disables memory layout transformations. This is the same as specifying -qno-opt-mem-layout-trans (Linux*) or /Qopt-mem-layout-trans- (Windows*).

1

Enables basic memory layout transformations.

2

Enables more memory layout transformations. This is the same as specifying [q or Q]opt-mem-layout-trans with no argument.

3

Enables more memory layout transformations like copy-in/copy-out of structures for a region of code. This setting should only be used when targeting systems that have more than 4GB of physical memory per core.

4

Enables more aggressive memory layout transformations. This setting should only be used when targeting systems that have more than 4GB of physical memory per core.

Default

-qopt-mem-layout-trans=2 or /Qopt-mem-layout-trans:2

The compiler performs moderate memory layout transformations.

Description

This option controls the level of memory layout transformations performed by the compiler. This option can improve cache reuse and cache locality.

Product and Performance Information

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

Notice revision #20201201

IDE Equivalent

None

Alternate Options

None