[Bug middle-end/58585] New: [4.9 Regression] ICE in ipa with virtual inheritance

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58585

            Bug ID: 58585
           Summary: [4.9 Regression] ICE in ipa with virtual inheritance
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: reichelt at gcc dot gnu.org

The following valid code snippet triggers an ICE on trunk when compiled with
"-O2 -fPIC":

================================
struct A
{
  virtual void foo() {}
  void bar();
};
void A::bar() { foo(); }

struct B : virtual A
{
  virtual void foo() {}
  char c;
};

struct C : virtual B
{
  C();
};
C::C() { bar(); }
================================

bug.cc:18:17: internal compiler error: in ipa_get_indirect_edge_target_1, at
ipa-cp.c:1570
 C::C() { bar(); }
                 ^
0xf46f8d ipa_get_indirect_edge_target_1
        ../../gcc/gcc/ipa-cp.c:1569
0x9958fe estimate_edge_devirt_benefit
        ../../gcc/gcc/ipa-inline-analysis.c:2783
0x9958fe estimate_edge_size_and_time
        ../../gcc/gcc/ipa-inline-analysis.c:2815
0x9958fe estimate_calls_size_and_time
        ../../gcc/gcc/ipa-inline-analysis.c:2868
0x996a72 estimate_node_size_and_time
        ../../gcc/gcc/ipa-inline-analysis.c:2955
0x999046 do_estimate_edge_size(cgraph_edge*)
        ../../gcc/gcc/ipa-inline-analysis.c:3498
0x99918c estimate_edge_size
        ../../gcc/gcc/ipa-inline.h:275
0x99918c estimate_edge_growth
        ../../gcc/gcc/ipa-inline.h:287
0x99918c do_estimate_growth_1
        ../../gcc/gcc/ipa-inline-analysis.c:3609
0x8004de cgraph_for_node_and_aliases(cgraph_node*, bool (*)(cgraph_node*,
void*), void*, bool)
        ../../gcc/gcc/cgraph.c:2156
0x999617 do_estimate_growth(cgraph_node*)
        ../../gcc/gcc/ipa-inline-analysis.c:3623
0xf5513d estimate_growth
        ../../gcc/gcc/ipa-inline.h:262
0xf5513d inline_small_functions
        ../../gcc/gcc/ipa-inline.c:1549
0xf5513d ipa_inline
        ../../gcc/gcc/ipa-inline.c:2009
0xf5513d execute
        ../../gcc/gcc/ipa-inline.c:2379
Please submit a full bug report, [etc.]

The regression appeared between 4.9.0-20130922 and 4.9.0-20130926.