GCC plugin with method was declared inside class

Question

I am developing an GCC plugin to process AST in SSA form. I create a callback run everytime after SSA form of function was compiled.

Here is my code

char* get_name_node(tree node) {
     // return string represent node name
}

void execute_plugin_pass() { 
     printf("%s\n", get_name_node(cfun->decl));
}

struct opt_pass plugin_pass = 
{
    GIMPLE_PASS,
    "plugin_pass",
    0,
    execute_plugin_pass,
    NULL,
    NULL,
    0,
    TV_PLUGIN_RUN,
    PROP_gimple_any,
    0,
    0,
    0,
    0
};



extern "C" int
plugin_init(plugin_name_args* info, plugin_gcc_version* ver)
{
    struct register_pass_info pass_info;
    pass_info.reference_pass_name = where;
    pass_info.pass = pass;
    pass_info.ref_pass_instance_number = 0;
    pass_info.pos_op = PASS_POS_INSERT_AFTER;
    register_callback("plugin", PLUGIN_PASS_MANAGER_SETUP, NULL, &pass_info);
    return 0;   
}

But above code not run for method of class which was declare inside class declaration For example, with this code

class A {
    void method1();
    void method2() {
         // run some code here
    }
};

void A::method1() {
    // run some code here
}

My plugin only run for method1, but dont run for method2

At begining, i think this problems is because method2() will be considered as inline function, so i add option -fno-inline when run plugin. But it doesn't work

Can anyone help me?

Answer 1

Probably, the issue is where to insert your pass in the executed passes. Remember that the set and order of executed GCC passes vary with the optimization (so is different with -O0, -O1, -O2, ...). I don't understand where you are inserting it.

I also sometimes have the same issue of choosing where should I insert my pass. I often have a trial and error approach. Look into file gcc/passes.c of the GCC source tree.

If you need the SSA form of Gimple, consider inserting after the "ssa" pass or maybe after "phiopt".

If you don't need SSA, consider inserting after "cfg".

Out of curiosity, could you explain what your GCC plugin is doing?

Did you consider using GCC MELT (MELT is a high level domain specific language to code GCC extensions) for your work?