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Qualifiers

Describes implementation-defined aspects of the Arm® C compiler and C library relating to qualifiers, as required by the ISO C standard.

What constitutes an access to an object that has volatile-qualified type (6.7.3).
Modifications of an object that has a volatile qualified type constitutes an access to that object. Value computation of an lvalue expression with a volatile qualified type constitutes an access to the corresponding object, even when the value is discarded.
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