4 KAP Command Qualifiers

This chapter describes KAP C command qualifiers that allow you to alter KAP defaults.

You will frequently be satisfied with the default qualifier settings of KAP C. However, you can alter default settings to customize optimizations for a given application program and machine. These include limiting the search space for loop optimization, adjusting the parameters that describe cache memory, and enabling or disabling classes of transformations.

Command qualifiers are qualifiers requested on the command line when submitting a KAP job, rather than in the source file.

To specify a command qualifier, you can use the long name or short name. If a command qualifier appears more than once on the command line, the last value given is used. Multiple occurrences of an input/output file selection qualifier are not allowed. Table 4-1 lists the command qualifiers. The first column lists the long name of each qualifier. This column also lists the functional categories of qualifiers: general optimization, parallel processing, inlining and Interprocedural Analysis, advanced optimization control, input/output files, and listing. The next two columns list the short name and default value of each qualifier. Qualifiers that have different argument syntax in their regular and negative (no) forms are shown on two lines.

Note

A slash (/) is required before each qualifier listed in the following table, but the slash is not shown in the table.

Table 4-1 Command-Line Qualifiers

The subheadings in the following sections list the long and short names for each qualifier, followed by its default in parentheses.

Unless otherwise noted, the code examples in this chapter were run with /optimize=5, /scalaropt=2, /roundoff=2 , and /unroll=1 .