Vax C90-EL SERIES Service Manual download pdf (Page 37)

Compiler Commands [2]

updates in a single loop. On UNICOS/mk systems, this option enables the

compiler to aggressively assign registers and schedule instructions.

2.8.3 -h display_opt

The -h display_opt option displays the current optimization settings for

this compilation.

2.8.4 -h [no]intrinsics (CC, cc)

Default option: -h intrinsics

The -h intrinsics option allows the use of intrinsic hardware functions,

which allow direct access to some hardware instructions or generate inline

code for some functions. This option has no effect on specially-handled library

functions.

Intrinsic functions are described in Appendix D, page 179.

2.8.5 -h [no]pattern (CC, cc)

Default option: -h pattern

The -h [no]pattern option globally enables or disables pattern matching.

Pattern matching is on by default, but takes effect only when -h vector2 or

-h scalar2 or greater are specified.

2.8.6 -h [no]overindex (CC, cc)

Default option: -h nooverindex

The -h overindex option declares that there are array subscripts that index

a dimension of an array that is outside the declared bounds of that array. The

-h nooverindex option declares that there are no array subscripts that index a

dimension of an array that is outside the declared bounds of that array.

2.9 Multi-streaming Processor Optimization Options (Cray SV1 Series Systems Only)

The following sections describe the multi-streaming processor (MSP) options. For

information on MSP #pragma directives, see Section 3.9, page 85.

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Vax C90-EL SERIES Service Manual Page 37