# vec-guard-write, Qvec-guard-write

Tells the compiler to perform a conditional check in a vectorized loop. This feature is only available for ifort.

## Syntax

Linux: | -vec-guard-write -no-vec-guard-write

macOS: | -vec-guard-write -no-vec-guard-write

Windows: | /Qvec-guard-write /Qvec-guard-write-

## Arguments

None

## Default

-vec-guard-write or /Qvec-guard-write | The compiler performs a conditional check in a vectorized loop.

## Description

This option tells the compiler to perform a conditional check in a vectorized loop. This checking avoids unnecessary stores and may improve performance.

## IDE Equivalent

None

## Alternate Options

None

Parent topic: Advanced Optimization Options