dwarf2out.c (loc_descriptor): For SUBREG pass SUBREG_REG's mode as second argument instead of mode.

	* dwarf2out.c (loc_descriptor): For SUBREG pass SUBREG_REG's mode as
	second argument instead of mode.

From-SVN: r180178

gcc/ChangeLog

+2011-10-19  Jakub Jelinek  <jakub@redhat.com>
+
+	* dwarf2out.c (loc_descriptor): For SUBREG pass SUBREG_REG's mode as
+	second argument instead of mode.
+
 2011-10-18  Jakub Jelinek  <jakub@redhat.com>
 
 	* config/i386/i386.c (ix86_expand_vec_perm): In merge_two use

gcc/dwarf2out.c

@@ -12502,7 +12502,8 @@ loc_descriptor (rtx rtl, enum machine_mode mode,
 	 legitimate to make the Dwarf info refer to the whole register which
 	 contains the given subreg.  */
       if (REG_P (SUBREG_REG (rtl)) && subreg_lowpart_p (rtl))
-	loc_result = loc_descriptor (SUBREG_REG (rtl), mode, initialized);
+	loc_result = loc_descriptor (SUBREG_REG (rtl),
+				     GET_MODE (SUBREG_REG (rtl)), initialized);
       else
 	goto do_default;
       break;