optimization/10861: [tree-ssa] ICE in assign_var

[bangerth@dealii.org]

>Number:         10861
>Category:       optimization
>Synopsis:       [tree-ssa] ICE in assign_var
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon May 19 14:46:01 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Wolfgang Bangerth
>Release:        unknown-1.0
>Organization:
>Environment:

>Description:
This proved hard to track down (thus a test case that's a little
longish), but worthwhile since this assertion triggers in
some 20 files of my library:
----------------------------------
void foo();

struct B {
    ~B() {
      int *p;
      if (0 != p) {
          int** x = 0;
          int* q = p;
          *x = q;
      }
    }
};

struct V : B {
    V() { }
    V(const V& x) { foo(); }
};

struct S {
    S(const S&);
};

struct P {
    S s;
    V v;
    P(const S& a, const V& b) : s(a), v(b) {}
};

void bar (P);
void baz (const S &s)
{
  P p(s, V());
  bar(p);
}
------------------------------

g/x> /home/bangerth/bin/gcc-3.4-tree-ssa/bin/c++ -O2 -c x.cc
x.cc: In function `void baz(const S&)':
x.cc:6: internal compiler error: in assign_vars, at tree-ssa.c:1557
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

W.
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: