[Bug 161] New: GDC prevents backend from removing dead functions

[via D.gnu]

http://bugzilla.gdcproject.org/show_bug.cgi?id=161

            Bug ID: 161
           Summary: GDC prevents backend from removing dead functions
           Product: GDC
           Version: development
          Hardware: All
                OS: All
            Status: NEW
          Severity: minor
          Priority: Low
         Component: gdc
          Assignee: ibuclaw at gdcproject.org
          Reporter: johannespfau at gmail.com

Private functions which are never used could be removed by the GCC backend, but
we somehow prevent the backend from doing that.

Example: C
--------------
static void foo() {}
--------------
gcc -S -O test.c

D:
--------------
private void foo() {}
--------------
gdc -S -O test.c

The problem is probably in d-decls.cc(FuncDeclaration::toSymbol) and is one of
(or a combination of) these: TREE_PUBLIC set, TREE_USED set, TREE_STATIC not
set?

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