[Bug ipa/59265] [4.9 Regression] Segmentation fault in ipa_note_param_call for -fprofile-use in SPEC CPU2006

[octoploid at yandex dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59265

--- Comment #2 from Markus Trippelsdorf <octoploid at yandex dot com> ---
Here's a reduced testcase that works without any gcda file:

markus@x4 testcase % < test.ii
class A {
  int m_fn1() const;
  unsigned m_fn2() const;
};
class B {
public:
  virtual void m_fn1();
};
class C final : B {
  C();
  virtual void m_fn2() { m_fn1(); }
};
int a;
unsigned A::m_fn2() const {
  if (m_fn1())
    return 0;
  a = m_fn2();
}
C::C() {}

markus@x4 testcase % c++ -c -fprofile-use -O2 -std=c++11 test.ii
test.ii: In member function ‘virtual void C::m_fn2()’:
test.ii:19:9: internal compiler error: Segmentation fault
 C::C() {}