[Bug middle-end/71387] New: [6/7 Regression] ICE in emit_move_insn, at expr.c:3418 with -Og

[burnus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71387

            Bug ID: 71387
           Summary: [6/7 Regression] ICE in emit_move_insn, at expr.c:3418
                    with -Og
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: burnus at gcc dot gnu.org
  Target Milestone: ---

The attached program fails with -Og as follows; using -O0, -O1, -O2 works.

(It fails likewise with GCC 7 (cf. below) and GCC 6 but works with GCC 5 [all
branch builds of today on x86-64-gnu-linux].)

$ g++ -Og test9a.ii -w
test9a.ii: In constructor
‘EPointIteratorRectangleBase::EPointIteratorRectangleBase(const
ERectangleBase*)’:
test9a.ii:37:43: internal compiler error: in emit_move_insn, at expr.c:3418
     m_actPoint = m_rectBase->getLowerRight();
                  ~~~~~~~~~~~~~~~~~~~~~~~~~^~
0xa864e7 emit_move_insn(rtx_def*, rtx_def*)
        ../../gcc/expr.c:3417
0xa8d9bd store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
        ../../gcc/expr.c:5450
0xa8f0d0 expand_assignment(tree_node*, tree_node*, bool)
        ../../gcc/expr.c:5042