patch c++: opaque types for pointers

[Aldy Hernandez]

Yeah well, I forgot all about C++ when I wrote opaque support ;-).

This patch adds support for opaque pointers in C++.

Bootstrapped and regtested on x86 linux for C and C++ languages.

OK?

2003-08-11  Aldy Hernandez  <aldyh@redhat.com>

	* cp/call.c (standard_conversion): Opaque pointers interconvert.

	* testsuite/g++.dg/other/opaque-3.C: New.
	
Index: cp/call.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/cp/call.c,v
retrieving revision 1.418
diff -c -p -r1.418 call.c
*** cp/call.c	7 Aug 2003 12:49:56 -0000	1.418
--- cp/call.c	11 Aug 2003 20:51:39 -0000
*************** standard_conversion (tree to, tree from,
*** 647,652 ****
--- 647,658 ----
    if ((tcode == POINTER_TYPE || TYPE_PTR_TO_MEMBER_P (to))
        && expr && null_ptr_cst_p (expr))
      conv = build_conv (STD_CONV, to, conv);
+   else if (tcode == POINTER_TYPE && fcode == POINTER_TYPE
+ 	   && TREE_CODE (TREE_TYPE (to)) == VECTOR_TYPE
+ 	   && TREE_CODE (TREE_TYPE (from)) == VECTOR_TYPE
+ 	   && ((*targetm.vector_opaque_p) (TREE_TYPE (to))
+ 	       || (*targetm.vector_opaque_p) (TREE_TYPE (from))))
+     conv = build_conv (STD_CONV, to, conv);
    else if ((tcode == INTEGER_TYPE && fcode == POINTER_TYPE)
  	   || (tcode == POINTER_TYPE && fcode == INTEGER_TYPE))
      {
Index: testsuite/g++.dg/other/opaque-3.C
===================================================================
RCS file: testsuite/g++.dg/other/opaque-3.C
diff -N testsuite/g++.dg/other/opaque-3.C
*** /dev/null	1 Jan 1970 00:00:00 -0000
--- testsuite/g++.dg/other/opaque-3.C	11 Aug 2003 20:51:39 -0000
***************
*** 0 ****
--- 1,11 ----
+ /* { dg-do compile { target powerpc-*-eabi* } } */
+ /* { dg-options "-mcpu=8540 -mabi=spe" } */
+ 
+ __ev64_opaque__ o;
+ #define v __attribute__((vector_size(8)))
+ v unsigned int *p;
+ 
+ void m()
+ {
+   o = __builtin_spe_evldd(p, 5);
+ }