Developer Guide and Reference

Contents

optimization_parameter

Passes certain information about a function to the optimizer.

Syntax

Linux*:
#pragma intel optimization_parameter target_arch
=<
CPU
>
#pragma intel optimization_parameter inline-max-total-size
=
n
#pragma intel optimization_parameter inline-max-per-routine
=
n
Windows*:
#pragma [intel] optimization_parameter target_arch
=<
CPU
>
#pragma [intel] optimization_parameter inline-max-total-size
=
n
#pragma [intel] optimization_parameter inline-max-per-routine
=
n
Arguments
inline-max-per-routine
=
n
Specifies the maximum number of times the inliner may inline into the routine.
n
is one of the following:
  • A non-negative integer constant that specifies the maximum number of times the inliner may inline into the function. If you specify zero, no inlining is done into the function.
  • The keyword unlimited, which means that there is no limit to the number of times the inliner may inline into the function.
inline-max-total-size
=
n
Specifies how much larger a function can normally grow when inline expansion is performed.
n
is one of the following:
  • A non-negative integer constant that specifies the permitted increase in the function's size when inline expansion is performed. If you specify zero, no inlining is done into the function.
  • The keyword unlimited, which means that there is no limit to the size a function may grow when inline expansion is performed.
Description
Place
#pragma intel optimization_parameter target_arch=
<CPU>
at the head of a function to get the compiler to target that function for a specified instruction set. The pragma applies only to the function before which it is placed.
The pragmas
intel optimization_parameter inline-max-total-size=n
and
intel optimization_parameter inline-max-per-routine=n
specify information used during inlining into a function.
Examples
Example: Targeting code for Intel® Advanced Vector Extensions (Intel® AVX) processors
For C++: icx -mAVX foo.c // on Linux* For DPC++: dpcpp -mAVX foo.c // on Linux*
The following code targets just the function
bar
for Intel® AVX processors, regardless of the command line options used.
Example: Targeting a function for Intel® Advanced Vector Extensions (Intel® AVX) processors
#pragma intel optimization_parameter target_arch=AVX void bar() { ... }

Product and Performance Information

1

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