[Bug tree-optimization/47896] New: wrong code with -O -fno-early-inlining -fipa-pta -fno-tree-dominator-opts -fno-tree-forwprop

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47896

           Summary: wrong code with -O -fno-early-inlining -fipa-pta
                    -fno-tree-dominator-opts -fno-tree-forwprop
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: zso...@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 23470
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23470
auto-reduced testcase

Output:
$ g++ -O -fno-early-inlining -fipa-pta -fno-tree-dominator-opts
-fno-tree-forwprop testcase.C
$ ./a.out 
Aborted

Testcase was reduced from g++.dg/torture/pr37922.C, which fails with:
$ g++ -O -fno-early-inlining -fipa-pta -fschedule-insns2
-fno-tree-dominator-opts -fno-tree-forwprop -funroll-loops pr37922.ii
$ ./a.out 
Aborted

Tested revisions:
r170489 - fail