[Bug middle-end/40156] [4.4 Regression] Possible bogus warning in libstdc++ headers

["rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #4 from rguenth at gcc dot gnu dot org  2009-05-15 09:17 -------
It is an uninitialized use in an exception handler.

;; basic block 132, loop depth 0, count 0
;; prev block 131, next block 133
;; pred:       131 (ab,eh,exec)
;; succ:       135 [100.0%]  (fallthru,exec)
<L49>:
save_filt.2381_159 = [filter_expr] <<<filter object>>>;
save_eptr.2380_160 = [exc_ptr_expr] <<<exception object>>>;
ivtmp.6668_667 = (long unsigned int) v$D45569$_M_impl$_M_start_645(D);
goto <bb 135>;

possibly reached from

;; basic block 116, loop depth 0, count 0
;; prev block 115, next block 117
;; pred:       115 [100.0%]  (fallthru,exec)
;; succ:       131 (ab,eh,exec) 117 [100.0%]  (fallthru,exec)
<bb 116>:
D.141736 = get (&D.141735); [return slot optimization]


we could avoid warning for these at all but I am not sure if that would
be appreciated.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40156