patch that caused regression PR opt/7675

[Janis Johnson]

The regression reported in PR optimization/7675 showed up
starting with this patch:

2000-11-11  Jason Merrill  <jason@redhat.com>

	* function.c (assign_parms): If TREE_ADDRESSABLE is set, try to 
	give the parm a register and then call put_var_into_stack.
	* stmt.c (expand_decl): Likewise.

cp/
	* typeck.c (mark_addressable): Don't call put_var_into_stack.

Here's a small test case that causes the compiler to ICE
when compiled on i686-linux with -O:

-------------------
/* ICE when compiled with -O */

int dummy (int *);

void foo(int i, int j)
{
  int k=j;

  void bar() { int x=k, y=i, z=j; }

  dummy(&j);
}
-------------------

Output from the mainline compiler:

7675.c: In function `foo':
7675.c:9: internal compiler error: in fixup_var_refs_1, at function.c:1900
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.

I've added this information to the PR.

Janis