https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90307

            Bug ID: 90307
           Summary: -Wuninitialized only at -O1, not at -O2
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rafael at espindo dot la
                CC: mjambor at suse dot cz
  Target Milestone: ---

Created attachment 46271
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46271&action=edit
testcase

Starting at 00ee3e3e4fea0457ef84bada636ae26ffcc95fff -Wall -O1 on the attached
testcase will print

distributed_test.ii:27:24: warning: ‘*((void*)& s +8)’ is used uninitialized in
this function [-Wuninitialized]

But the warning goes away at -O2 an higher. Should this perhaps be in
-Wmaybe-uninitialized?

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