[Bug middle-end/46404] New: [4.6 Regression] ICE: definition in block 5 does not dominate use in block 32 with -O -fgraphite-identity -fno-tree-scev-cprop

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46404

           Summary: [4.6 Regression] ICE: definition in block 5 does not
                    dominate use in block 32 with -O -fgraphite-identity
                    -fno-tree-scev-cprop
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
                CC: spop@gcc.gnu.org
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 22360
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22360
reduced testcase

Compiler output:
$ gcc -O -fgraphite-identity -fno-tree-scev-cprop testcase.c
testcase.c: In function 'foo':
testcase.c:4:1: error: definition in block 5 does not dominate use in block 32
for SSA_NAME: i_6 in statement:
D.2701_26 = i_6 > 0;
testcase.c:4:1: internal compiler error: verify_ssa failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r166509 - crash
r163636 - crash
r161659 - OK
4.5 r166509 - OK