Fix for -maix64 and medium sized struct passing.

From-SVN: r48102

gcc/ChangeLog

+2001-12-17  Tom Rix  <trix@redhat.com>
+
+	* config/rs6000/rs6000.c (expand_block_move): Fix limits on max size 
+ 	of bytes.
+
 2001-12-17  Richard Sandiford  <rsandifo@redhat.com>
 
 	* target.h (asm_out.byte_op, asm_out.aligned_op, asm_out.unaligned_op,

gcc/config/rs6000/rs6000.c

@@ -4075,25 +4075,9 @@ expand_block_move (operands)
   if (bytes <= 0)
     return 1;
 
-  /* Don't support real large moves.  If string instructions are not used,
-     then don't generate more than 8 loads.  */
-  if (TARGET_STRING)
-    {
-      if (bytes > 8*4)
-	return 0;
-    }
-  else if (! STRICT_ALIGNMENT)
-    {
-      if (TARGET_POWERPC64 && align >= 4)
-	{
-	  if (bytes > 8*8)
-	    return 0;
-	}
-      else
-	if (bytes > 8*4)
-	  return 0;
-    }
-  else if (bytes > 8*align)
+  /* store_one_arg depends on expand_block_move to handle at least the size of
+     reg_parm_stack_space. */	
+  if (bytes > (TARGET_POWERPC64 ? 64 : 32))
     return 0;
 
   /* Move the address into scratch registers.  */