dwarf2out.c (gen_subprogram_die): Require dwarf unwinding to use DW_OP_call_frame_cfa.

2012-03-15  Tristan Gingold  <gingold@adacore.com>

        * dwarf2out.c (gen_subprogram_die): Require dwarf unwinding to
        use DW_OP_call_frame_cfa.

From-SVN: r185411

gcc/ChangeLog

+2012-03-15  Tristan Gingold  <gingold@adacore.com>
+
+	* dwarf2out.c (gen_subprogram_die): Require dwarf unwinding to
+	use DW_OP_call_frame_cfa.
+
 2012-03-14  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/50797

gcc/dwarf2out.c

@@ -17443,7 +17443,7 @@ gen_subprogram_die (tree decl, dw_die_ref context_die)
 	 (3) We can at least reuse the code inspection and interpretation
 	 code that determines the CFA position at various points in the
 	 function.  */
-      if (dwarf_version >= 3)
+      if (dwarf_version >= 3 && targetm.debug_unwind_info () == UI_DWARF2)
 	{
 	  dw_loc_descr_ref op = new_loc_descr (DW_OP_call_frame_cfa, 0, 0);
 	  add_AT_loc (subr_die, DW_AT_frame_base, op);