Convert IS_TYPE_UNIT_GROUP to method

This converts the IS_TYPE_UNIT_GROUP to a method on
dwarf2_per_cu_data.

gdb/ChangeLog
2020-02-24  Tom Tromey  <tom@tromey.com>

	* dwarf2/read.h (struct dwarf2_per_cu_data) <type_unit_group_p>:
	New method.
	* dwarf2/read.c (IS_TYPE_UNIT_GROUP): Remove.
	(dw2_do_instantiate_symtab, dw2_get_file_names)
	(build_type_psymtab_dependencies, load_full_type_unit): Update.

gdb/ChangeLog

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 044a192..2507b9c 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,13 @@
 2020-02-24  Tom Tromey  <tom@tromey.com>
 
+	* dwarf2/read.h (struct dwarf2_per_cu_data) <type_unit_group_p>:
+	New method.
+	* dwarf2/read.c (IS_TYPE_UNIT_GROUP): Remove.
+	(dw2_do_instantiate_symtab, dw2_get_file_names)
+	(build_type_psymtab_dependencies, load_full_type_unit): Update.
+
+2020-02-24  Tom Tromey  <tom@tromey.com>
+
 	* dwarf2read.c (dwarf2_build_psymtabs_hard): Use
 	make_scoped_restore.
 	(dwarf2_psymtab::read_symtab): Don't clear

gdb/dwarf2/read.c

diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index 701d19e..0f514ea 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -573,9 +573,7 @@
   /* dwarf2read.c's main "handle" on a TU symtab.
      To simplify things we create an artificial CU that "includes" all the
      type units using this stmt_list so that the rest of the code still has
-     a "per_cu" handle on the symtab.
-     This PER_CU is recognized by having no section.  */
-#define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
+     a "per_cu" handle on the symtab.  */
   struct dwarf2_per_cu_data per_cu;
 
   /* The TUs that share this DW_AT_stmt_list entry.
@@ -2322,7 +2320,7 @@
 
   /* Skip type_unit_groups, reading the type units they contain
      is handled elsewhere.  */
-  if (IS_TYPE_UNIT_GROUP (per_cu))
+  if (per_cu->type_unit_group_p ())
     return;
 
   /* The destructor of dwarf2_queue_guard frees any entries left on
@@ -3178,7 +3176,7 @@
   /* This should never be called for TUs.  */
   gdb_assert (! this_cu->is_debug_types);
   /* Nor type unit groups.  */
-  gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu));
+  gdb_assert (! this_cu->type_unit_group_p ());
 
   if (this_cu->v.quick->file_names != NULL)
     return this_cu->v.quick->file_names;
@@ -7583,7 +7581,7 @@
   int i;
 
   gdb_assert (len > 0);
-  gdb_assert (IS_TYPE_UNIT_GROUP (per_cu));
+  gdb_assert (per_cu->type_unit_group_p ());
 
   pst->number_of_dependencies = len;
   pst->dependencies = objfile->partial_symtabs->allocate_dependencies (len);
@@ -22718,7 +22716,7 @@
   struct signatured_type *sig_type;
 
   /* Caller is responsible for ensuring type_unit_groups don't get here.  */
-  gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu));
+  gdb_assert (! per_cu->type_unit_group_p ());
 
   /* We have the per_cu, but we need the signatured_type.
      Fortunately this is an easy translation.  */

gdb/dwarf2/read.h

diff --git a/gdb/dwarf2/read.h b/gdb/dwarf2/read.h
index b06c2e2..f7e740c 100644
--- a/gdb/dwarf2/read.h
+++ b/gdb/dwarf2/read.h
@@ -437,6 +437,13 @@
   {
     return dwarf_version;
   }
+
+  /* A type unit group has a per_cu object that is recognized by
+     having no section.  */
+  bool type_unit_group_p () const
+  {
+    return section == nullptr;
+  }
 };
 
 /* Entry in the signatured_types hash table.  */