[Bug tree-optimization/17635] [4.0 regression] ICE in verify_ssa: type mismatch

["bangerth at dealii dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From bangerth at dealii dot org  2004-09-23 15:36 -------
Here's the smallest I can get it within the constraints of my time: 
---------------------------- 
#include <vector> 
 
template<typename T> 
T max_element(T __first, T __last) { 
  if (__first == __last) 
    return __first; 
  T __result = __first; 
  while (++__first != __last) 
    if (*__result < *__first) 
      __result = __first; 
  return __result; 
} 
 
struct S { 
    std::vector<bool> used; 
}; 
 
struct A { 
    unsigned int foo (); 
    std::vector<S*> s; 
}; 
 
struct Accessor { 
    A *a; 
 
    bool used () { 
      return this->a->s[0]->used[0]; 
    } 
 
    void bar () { 
      this->a->s[0]->used.size(); 
    } 
}; 
 
struct D { 
    bool baz (); 
 
    Accessor accessor; 
 
    void bar () { 
      accessor.bar(); 
      if (this->accessor.used()) 
        return; 
    } 
}; 
 
unsigned int A::foo () { 
  std::vector<int> v; 
  for (D d; d.baz(); d.bar()) +v[0]; 
  return (*max_element (v.begin(), v.end())); 
} 
------------------------------- 
 
g/x> /home/bangerth/bin/gcc-4.0-pre/bin/c++ -O3 -ftree-vectorize -c x.cc 
x.cc: In member function `unsigned int A::foo()': 
x.cc:47: error: Type mismatch between an SSA_NAME and its symbol. 
x.cc:47: error: Missing definition 
for SSA_NAME: D.14109_789in statement: 
D.14109_788 = PHI <D.14109_149(29), D.14109_789(6)>; 
x.cc:47: internal compiler error: verify_ssa failed. 
Please submit a full bug report, 
with preprocessed source if appropriate. 
See <URL:http://gcc.gnu.org/bugs.html> for instructions. 
 
W. 

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17635