[Bug tree-optimization/68659] New: [6 regression] FAIL: gcc.dg/graphite/id-pr45230-1.c (internal compiler error)

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68659

            Bug ID: 68659
           Summary: [6 regression] FAIL: gcc.dg/graphite/id-pr45230-1.c
                    (internal compiler error)
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: amker at gcc dot gnu.org
  Target Milestone: ---
            Target: powerpc-*-*

$ gcc/xgcc -Bgcc/ ../gcc/testsuite/gcc.dg/graphite/id-pr45230-1.c -O2
-fgraphite-identity  -S -m32 -o id-pr45230-1.s
../gcc/testsuite/gcc.dg/graphite/id-pr45230-1.c: In function ‘main’:
../gcc/testsuite/gcc.dg/graphite/id-pr45230-1.c:45:1: internal compiler error:
Segmentation fault
 main ()
 ^~~~

0x106e622b crash_signal
        ../../gcc/toplev.c:334
0x107ec79c copy_prop_visit_phi_node
        ../../gcc/tree-ssa-copy.c:349
0x10868f2b simulate_stmt
        ../../gcc/tree-ssa-propagate.c:327
0x1086a327 simulate_block
        ../../gcc/tree-ssa-propagate.c:483
0x1086a327 ssa_propagate(ssa_prop_result (*)(gimple*, edge_def**, tree_node**),
ssa_prop_result (*)(gphi*))
        ../../gcc/tree-ssa-propagate.c:926
0x107ebbd3 execute_copy_prop
        ../../gcc/tree-ssa-copy.c:605
0x107ebbd3 execute
        ../../gcc/tree-ssa-copy.c:636

a94f1e5b00dee567897c91cdadb16dc46f3911e0 is the first bad commit

    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@231097
138bc75d-0d04-0410-961f-82ee72b054a4