[tree-ssa] simple test case ICEs

[Fariborz Jahanian]

Following test cases ICEs with the compiler in tree-ssa branch. Is this 
a known bug?

- Fariborz

float (*x)[];

void a_tether( ) {
  (*x)[20] = 3.0;
}

mygcct -c bad.c
bad.c: In function `a_tether':

bad.c:4: internal compiler error: in int_mode_for_mode, at 
stor-layout.c:290
Please submit a full bug report,
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See <URL:http://gcc.gnu.org/bugs.html> for instructions.