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. Option -qopt-subscript-in-range is the replacement option for -opt-subscript-in-range, which is deprecated.

Syntax

Linux and 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 ]