[Bug tree-optimization/64091] New: [5 Regression] ICE in update_debug_stmt, at tree-ssa-tail-merge.c:1620

[d.g.gorbachev at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64091

            Bug ID: 64091
           Summary: [5 Regression] ICE in update_debug_stmt, at
                    tree-ssa-tail-merge.c:1620
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: d.g.gorbachev at gmail dot com

Created attachment 34129
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34129&action=edit
TC (compile with "-O2 -fvar-tracking-assignments")

GCC 5.0.0 20141123 (experimental)

1.c: In function 'main':
1.c:3:5: internal compiler error: in update_debug_stmt, at
tree-ssa-tail-merge.c:1620
 int main(void)
     ^
0x8913666 update_debug_stmt
    ../../gcc-5/gcc/tree-ssa-tail-merge.c:1620
0x8913666 update_debug_stmts
    ../../gcc-5/gcc/tree-ssa-tail-merge.c:1656
0x8913666 tail_merge_optimize(unsigned int)
    ../../gcc-5/gcc/tree-ssa-tail-merge.c:1729
0x88c88bb execute
    ../../gcc-5/gcc/tree-ssa-pre.c:4848