[committed] Use SCALAR_INT_TYPE_MODE in loc_list_from_tree_1

[Richard Sandiford]

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

Tested on aarch64-linux-gnu, x86_64-linux-gnu and powerpc64le-linux-gnu.
Applied as obvious.

Richard


2017-10-23  Richard Sandiford  <richard.sandif...@linaro.org>
            Alan Hayward  <alan.hayw...@arm.com>
            David Sherwood  <david.sherw...@arm.com>

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

Index: gcc/dwarf2out.c
===================================================================
--- gcc/dwarf2out.c     2017-10-19 21:19:47.742454435 +0100
+++ gcc/dwarf2out.c     2017-10-23 10:36:59.967280171 +0100
@@ -17482,7 +17482,7 @@ loc_list_from_tree_1 (tree loc, int want
                && (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);