[Bug ipa/64978] [5 Regression] ICE: in ipcp_verify_propagated_values, at ipa-cp.c:1060

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64978

--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
trippels@gcc2-power8 makeconv % cat msgfmt.ii
typedef enum
{
} UErrorCode;
class A
{
  virtual A *m_fn1 () const;
};
class B : A
{
  B (const B &);
  A *m_fn1 () const;
  class PluralSelectorProvider
  {
  public:
    PluralSelectorProvider ();
  } pluralProvider;
  PluralSelectorProvider ordinalProvider;
  void m_fn2 (const B &, UErrorCode &);
};
UErrorCode a;
B::B (const B &p1) { m_fn2 (p1, a); }
A *
B::m_fn1 () const
{
  B (*this);
}
void
B::m_fn2 (const B &, UErrorCode &)
{
  for (;;)
    m_fn1 ();
}


trippels@gcc2-power8 makeconv % cat reldtfmt.ii
typedef enum
{
} UErrorCode;
namespace icu_52
{
class UnicodeString
{
public:
  UnicodeString (int);
};
}
enum UDateFormatStyle
{
};
namespace icu_52
{
class Locale;
class RelativeDateFormat
{
  RelativeDateFormat (UDateFormatStyle, UDateFormatStyle, const Locale &,
                      UErrorCode &);
  void m_fn1 ();
};
class MessageFormat
{
public:
  MessageFormat (const UnicodeString &, UErrorCode &);
};
RelativeDateFormat::RelativeDateFormat (UDateFormatStyle, UDateFormatStyle,
                                        const Locale &, UErrorCode &)
{
  m_fn1 ();
}
UErrorCode a;
void
RelativeDateFormat::m_fn1 ()
{
  MessageFormat (0, a);
}
}


trippels@gcc2-power8 makeconv % g++ -fPIC -flto -O3 -fvisibility=hidden
-std=c++11 -c msgfmt.ii
trippels@gcc2-power8 makeconv % g++ -fPIC -flto -O3 -fvisibility=hidden
-std=c++11 -c reldtfmt.ii
trippels@gcc2-power8 makeconv %
/home/trippels/gcc_test/usr/local/bin/../lib/gcc/../../libexec/gcc/powerpc64-unknown-linux-gnu/5.0.0/lto1
-quiet -fwpa msgfmt.o reldtfmt.o
lto1: internal compiler error: in ipcp_verify_propagated_values, at
ipa-cp.c:1060
0x10d1bbef ipcp_verify_propagated_values()
        ../../gcc/gcc/ipa-cp.c:1060
0x10d1dcfb ipcp_propagate_stage
        ../../gcc/gcc/ipa-cp.c:2761
0x10d1dcfb ipcp_driver
        ../../gcc/gcc/ipa-cp.c:4410
0x10d1dcfb execute
        ../../gcc/gcc/ipa-cp.c:4505
Please submit a full bug report,
with preprocessed source if appropriate.