Developer Guide and Reference

Contents

ffnalias, Ow

Determines whether aliasing is assumed within functions.

Syntax

Linux and macOS:
-ffnalias
-fno-fnalias
Windows:
/Ow
/Ow-
Arguments
None
Default
-ffnalias
or
/Ow
Aliasing is assumed within functions.
Description
This option determines whether aliasing is assumed within functions.
If you specify
-fno-fnalias
or
/Ow-
, aliasing is not assumed within functions, but it is assumed across calls.
If you specify
-ffnalias
or
/Ow
, aliasing is assumed within functions.
Alternate Options
None

Product and Performance Information

1

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