Use SCALAR_INT_TYPE_MODE in loc_list_from_tree_1

This follows on from similar changes a couple of months ago and
is needed when general modes have variable size.

2017-10-23  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* dwarf2out.c (loc_list_from_tree_1): Use SCALAR_INT_TYPE_MODE

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r254001

gcc/ChangeLog

@@ -2,6 +2,12 @@
 	    Alan Hayward  <alan.hayward@arm.com>
 	    David Sherwood  <david.sherwood@arm.com>
 
+	* dwarf2out.c (loc_list_from_tree_1): Use SCALAR_INT_TYPE_MODE
+
+2017-10-23  Richard Sandiford  <richard.sandiford@linaro.org>
+	    Alan Hayward  <alan.hayward@arm.com>
+	    David Sherwood  <david.sherwood@arm.com>
+
 	* expmed.c (expand_shift_1): Use scalar_mode for scalar_mode.
 
 2017-10-23  Richard Biener  <rguenther@suse.de>

gcc/dwarf2out.c

@@ -17482,7 +17482,7 @@ loc_list_from_tree_1 (tree loc, int want_address,
 		&& (INTEGRAL_TYPE_P (TREE_TYPE (loc))
 		    || POINTER_TYPE_P (TREE_TYPE (loc)))
 		&& DECL_CONTEXT (loc) == current_function_decl
-		&& (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (loc)))
+		&& (GET_MODE_SIZE (SCALAR_INT_TYPE_MODE (TREE_TYPE (loc)))
 		    <= DWARF2_ADDR_SIZE))
 	      {
 		dw_die_ref ref = lookup_decl_die (loc);