[Bug gold/18440] New: ICF depends on the section name to detect constructors and destructors

[rafael.espindola at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=18440

            Bug ID: 18440
           Summary: ICF depends on the section name to detect constructors
                    and destructors
           Product: binutils
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gold
          Assignee: ccoutant at gmail dot com
          Reporter: rafael.espindola at gmail dot com
                CC: ian at airs dot com, tmsriram at google dot com
  Target Milestone: ---

ICF has the following logic

          // With --icf=safe, check if the mangled function name is a ctor
          // or a dtor.  The mangled function name can be obtained from the
          // section name by stripping the section prefix.
          if (parameters->options().icf_safe_folding()
              && !is_function_ctor_or_dtor(section_name)
              && (!target.can_check_for_function_pointers()
                  || section_has_function_pointers(*p, i)))
            {
              continue;
            }

This unfortunately doesn't work if the compiler avoids producing the long
section names (as llvm now can).

Is there a convenient pass over the symbols that could be used for this
instead?

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