[Bug symtab/29106] New: new DWARF reader should de-duplicate functions

["tromey at sourceware dot org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29106

            Bug ID: 29106
           Summary: new DWARF reader should de-duplicate functions
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: symtab
          Assignee: unassigned at sourceware dot org
          Reporter: tromey at sourceware dot org
  Target Milestone: ---

In https://sourceware.org/pipermail/gdb-patches/2022-April/188400.html,
Pedro pointed out that, even with the patch in that thread,
the new DWARF reader still generates a larger index:

In the old indexer, with an index of a gdb from before the indexer rewrite, we
had:

 [369902] intrusive_list<inferior, intrusive_base_node<inferior> >::begin:
          9 [global, function]
          255 [global, function]

while in the new indexer, for the same function, we have:

 [369902] intrusive_list<inferior, intrusive_base_node<inferior> >::begin:
         9 [global, function]
         79 [global, function]
         165 [global, function]
         167 [global, function]
[ ... many more instances ... ]

I suspect this is due to the old handling of DW_AT_inline.
See https://sourceware.org/pipermail/gdb-patches/2022-April/188557.html

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