[Bug tree-optimization/29710] gnat ICEs on -fprefetch-loop-arrays -O1.

[davek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29710

--- Comment #7 from Dave Korn <davek at gcc dot gnu.org> 2010-12-11 10:46:22 UTC ---
(In reply to comment #6)

> Although I haven't verified that this is the same as the original problem
> report, it really looks like it, modulo various changes to the compiler's
> internals since 4.2; in particular, 
> 
> (In reply to comment #4)
> > (gdb) p current_stmt_group
> > $6 = (struct stmt_group *) 0x0
> 
> ... that looks like that null third argument causing problems to me.

  Ah, but there was no integer_three_node back then and builtin_expect only
used to take two args at the time.  So it can't be the same thing after all.