[Bug tree-optimization/41339] Variables can occur multiple times in cfun->local_decls

["baldrick at free dot fr" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #3 from baldrick at free dot fr  2009-09-12 19:52 -------
I just updated to top-of-tree, and the same problem is present.
I think the variable is the RESULT_DECL from function f.  Here's
a dump of the repeated variable (notice how the next variable
on the chain is the same as this one):

(gdb) call debug_tree(cfun->local_decls)
 <tree_list 0x7ffff70da6f0
    value <var_decl 0x7ffff7f51be0 D.2696
        type <integer_type 0x7ffff7e8c540 int public SI
            size <integer_cst 0x7ffff7e7ba80 constant 32>
            unit size <integer_cst 0x7ffff7e7b6f0 constant 4>
            align 32 symtab 0 alias set 9 canonical type 0x7ffff7e8c540
precision 32 min <integer_cst 0x7ffff7e7b9f0 -2147483648> max <integer_cst
0x7ffff7e7ba20 2147483647>
            pointer_to_this <pointer_type 0x7ffff7e9bb40>>
        used ignored SI file decls.c line 2 col 6 size <integer_cst
0x7ffff7e7ba80 32> unit size <integer_cst 0x7ffff7e7b6f0 4>
        align 32 context <function_decl 0x7ffff70c1e00 g> abstract_origin
<result_decl 0x7ffff70db000 D.1604>>
    chain <tree_list 0x7ffff70da6c0 value <var_decl 0x7ffff7f51be0 D.2696>>>


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41339