| GNU Compiler Collection (GCC) Internals: Plugins gate |
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After the original gate function for a pass is called, its result
- the gate status - is stored as an integer.
Then the event PLUGIN_OVERRIDE_GATE is invoked, with a pointer
to the gate status in the gcc_data parameter to the callback function.
A nonzero value of the gate status means that the pass is to be executed.
You can both read and write the gate status via the passed pointer.