[tree-ssa] Fix handling of BIT_FIELD_REFs and VECTOR_TYPEs.

[Daniel Berlin]

On Mar 22, 2004, at 10:38 AM, Diego Novillo wrote:

> On Mon, 2004-03-22 at 10:16, Bonzini wrote:
>
>> 	* tree-alias-common.c (find_func_aliases): Handle
>> 	MODIFY_EXPRs where the first operand is a BIT_FIELD_REF.
>> 	* tree-simple.c: Document that a BIT_FIELD_REF is a
>> 	valid GIMPLE lvalue.
>> 	(is_gimple_reg_type): A VECTOR_TYPE does not behave like
>> 	a scalar.
>> 	* tree-ssa-operands.c (get_expr_operands): Glob references
>> 	made through BIT_FIELD_REF.
>> 	* tree-ssa.c (set_is_used): Go through BIT_FIELD_REFs.
>>
> Hmm, get_expr_operands already handles BIT_FIELD_REFs.  Do you have a
> failing test case?  If we are not handling them like VOPs now, we 
> should
> be failing tests.
>

Though even though that part may be wrong, the tree-alias-common part 
is most likely correct.
It just didn't happen that i had a testcase where we had a 
BIT_FIELD_REF on the LHS.
>
> Thanks.  Diego.
>