opt-subscript-in-range, Qopt-subscript-in-range

Determines whether the compiler assumes no overflows in the intermediate computation of subscript expressions in loops.

IDE Equivalent

None

Architectures

IA-32, Intel® 64 architectures

Syntax

Linux and Mac OS X:

-opt-subscript-in-range

-no-opt-subscript-in-range

Windows:

/Qopt-subscript-in-range

/Qopt-subscript-in-range-

Arguments

None

Default

-no-opt-subscript-in-range
or/Qopt-subscript-in-range-

The compiler assumes overflows in the intermediate computation of subscript expressions in loops.

Description

This option determines whether the compiler assumes no overflows in the intermediate computation of subscript expressions in loops.

If you specify -opt-subscript-in-range (Linux and Mac OS X) or /Qopt-subscript-in-range (Windows), the compiler ignores any data type conversions used and it assumes no overflows in the intermediate computation of subscript expressions. This feature can enable more loop transformations.

Alternate Options

None

Example

The following shows an example where these options can be useful. m is declared as type long (64-bits) and all other variables inside the subscript are declared as type int (32-bits):

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