# qopt-subscript-in-range, Qopt-subscript-in-range

Determines whether the compiler assumes that there are no "large" integers being used or being computed inside loops. This feature is only available for ifort.

## Syntax

Linux: | -qopt-subscript-in-range -qno-opt-subscript-in-range

macOS: | -qopt-subscript-in-range -qno-opt-subscript-in-range

Windows: | /Qopt-subscript-in-range /Qopt-subscript-in-range-

## Arguments

None

## Default

-qno-opt-subscript-in-range or /Qopt-subscript-in-range- | The compiler assumes there are "large" integers being used or being computed within loops.

## Description

This option determines whether the compiler assumes that there are no "large" integers being used or being computed inside loops.

If you specify [q or Q]opt-subscript-in-range, the compiler assumes that there are no "large" integers being used or being computed inside loops. A "large" integer is typically > 231.

This feature can enable more loop transformations.

## IDE Equivalent

None

## Alternate Options

None

## Example

The following example shows how these options can be useful. Variable m is declared as type integer(kind=8) (64-bits) and all other variables inside the subscript are declared as type integer(kind=4) (32-bits):

    A[ i  + j  + ( n  + k) * m ]

Parent topic: Advanced Optimization Options