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1) pointers/references I can't understand how are used the nodes indirectref, nop, convert, mustnotthow, nonlvalue, addr.
I have done some tests with pointers and references. I can't know when the node describe the unreference action or address computing action. indirect seems to be like * C operator and addr seems to be like & C operator but it's not true.
2) plus operator if i write the expression "a.y", the internal GCC represention is sometimes a set of nodes using 'plus' node instead of a single 'ComponentRef' node.
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