HP C B.11.11.16 Release Notes

HP C/ANSI C Release Notes

New Features in Version B.11.11.08

Chapter 1 17

+Olit=const places all string literals appearing in a context where const char * is legal,

and all const-qualiﬁed variables that do not require load-time or run-time initialization in

the read-only data section.

If +Olit=none is speciﬁed, no constants are placed in the read-only data section.

+O[no]memory[=malloc] Option

This option enables[disables] memory optimizations. Specifying malloc in the list

enables[disables] optimizations which consolidate memory allocation procedure calls. This

option is disabled by default. It is incompatible with +OopenMP and +Oparallel, and is

ignored when these options are in effect.

Assigned goto Feature

Assigned goto is a gcc compatibility feature, to use labels as values. The address of a label

deﬁned in the current function can be got using the unary operator &&. The value has type

void *.

For example:

void *ptr;

/* ... */

ptr = && label_foo;

To use these values, the user must be able to jump to one. This is done with the computed

goto statement(1), goto *EXP;. For example,

goto *ptr;

Any expression of type void * is allowed.

__label__ Feature to Locally Declare Labels

A local label is simply an identiﬁer. You can jump to it with an ordinary goto statement, but

only from within the compound statement it belongs to.

The syntax for a local label is given below:

__label__ LABEL;

__label__ LABEL1, LABEL2, ...;