patch: x86 generic simd fixlet

[Aldy Hernandez]

Janis' testcases expose a myraid of different ICE's on x86.

This one in particular:

	typedef int __attribute__((mode(V4SI))) v4si;
	void
	pass_v4si (v4si v) {}

...aborts on ix86_function_arg_boundary.  The problem is that
contains_128bit_aligned_vector_p() is only checking SSE_REG_MODE_P.
It should also check TARGET_SSE because V4SI can be used with generic
simd support.

I also fixed a line wrap problem on the function comment for
contains_128bit_aligned_vector_p.

OK?

Aldy

2003-07-08  Aldy Hernandez  <aldyh@redhat.com>

	* config/i386/i386.c (contains_128bit_aligned_vector_p): Check
	that SSE modes return true only if SSE is enabled.

Index: config/i386/i386.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/i386/i386.c,v
retrieving revision 1.585
diff -c -p -r1.585 i386.c
*** config/i386/i386.c	6 Jul 2003 23:05:09 -0000	1.585
--- config/i386/i386.c	8 Jul 2003 19:11:34 -0000
*************** contains_128bit_aligned_vector_p (type)
*** 2601,2606 ****
--- 2601,2607 ----
  {
    enum machine_mode mode = TYPE_MODE (type);
    if (SSE_REG_MODE_P (mode)
+       && TARGET_SSE
        && (!TYPE_USER_ALIGN (type) || TYPE_ALIGN (type) > 128))
      return true;
    if (TYPE_ALIGN (type) < 128)
*************** contains_128bit_aligned_vector_p (type)
*** 2651,2658 ****
    return false;
  }
  
! /* Gives the alignment boundary, in bits, of an argument with the specified mode
!    and type.   */
  
  int
  ix86_function_arg_boundary (mode, type)
--- 2652,2659 ----
    return false;
  }
  
! /* Gives the alignment boundary, in bits, of an argument with the
!    specified mode and type.  */
  
  int
  ix86_function_arg_boundary (mode, type)