hpux.h (LINK_SPEC): Add -z.

	* config/ia64/hpux.h (LINK_SPEC): Add -z.
	* config/ia64/ia64.c (ia64_function_value): Return a REG not a
	PARALLEL for an empty structure.

From-SVN: r96004

gcc/ChangeLog

+2005-03-07  Joseph S. Myers  <joseph@codesourcery.com>
+
+	* config/ia64/hpux.h (LINK_SPEC): Add -z.
+	* config/ia64/ia64.c (ia64_function_value): Return a REG not a
+	PARALLEL for an empty structure.
+
 2005-03-07  Kazu Hirata  <kazu@cs.umass.edu>
 
 	* fold-const.c (fold_binary): Remove handling of RANGE_EXPR.

gcc/config/ia64/hpux.h

@@ -75,7 +75,7 @@ do {							\
 
 #undef LINK_SPEC
 #define LINK_SPEC \
-  "+Accept TypeMismatch \
+  "-z +Accept TypeMismatch \
    %{shared:-b} \
    %{!shared: \
      -u main \

gcc/config/ia64/ia64.c

@@ -3915,6 +3915,10 @@ ia64_function_value (tree valtype, tree func ATTRIBUTE_UNUSED)
 
 	  offset = 0;
 	  bytesize = int_size_in_bytes (valtype);
+	  /* An empty PARALLEL is invalid here, but the return value
+	     doesn't matter for empty structs.  */
+	  if (bytesize == 0)
+	    return gen_rtx_REG (mode, GR_RET_FIRST);
 	  for (i = 0; offset < bytesize; i++)
 	    {
 	      loc[i] = gen_rtx_EXPR_LIST (VOIDmode,