Developer Guide and Reference

Contents

falias, Oa

Determines whether aliasing is assumed in a program.

Syntax

Linux and macOS:
-falias
-fno-alias
Windows:
/Oa
/Oa-
Arguments
None
Default
-falias
or
/Oa-
On Linux* and
macOS*
, aliasing is assumed in the program. On Windows*, aliasing is not assumed in a program.
Description
This option determines whether aliasing is assumed in a program.
If you specify
-fno-alias
or
/Oa
, aliasing is not assumed in a program.
If you specify
-falias
or
/Oa-
, aliasing is assumed in a program. However, this may affect performance.
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