[Bug middle-end/51261] New: [4.7 Regression] -fcompare-debug with memset()

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51261

             Bug #: 51261
           Summary: [4.7 Regression] -fcompare-debug with memset()
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
                CC: aoliva@gcc.gnu.org
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 25874
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25874
reduced testcase

There have been many -fcompare-debug failures in the last testsuite run.

Compiler output:
$ gcc -fcompare-debug testcase.C 
gcc: error: testcase.C: -fcompare-debug failure

Tested revisions:
r181550 - fail
r181508 - fail
r181442 - OK