[RFA] Remove a VEC from dwarf2read.c

[Tom Tromey <tom@tromey.com>]

This removes a VEC from dwarf2read.c, replacing it with a std::vector.

Tested by the buildbot.

gdb/ChangeLog
2018-06-07  Tom Tromey  <tom@tromey.com>

	* dwarf2read.c (process_cu_includes): Update.
	(process_full_comp_unit): Update.
	* dwarf2read.h (struct dwarf2_per_objfile) <just_read_cus>: Now a
	std::vector.
---
 gdb/ChangeLog    |  7 +++++++
 gdb/dwarf2read.c | 12 +++---------
 gdb/dwarf2read.h |  2 +-
 3 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 1cabfbb0d45..7f1857930b1 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -10217,19 +10217,13 @@ compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu)
 static void
 process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile)
 {
-  int ix;
-  struct dwarf2_per_cu_data *iter;
-
-  for (ix = 0;
-       VEC_iterate (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus,
-		    ix, iter);
-       ++ix)
+  for (struct dwarf2_per_cu_data *iter : dwarf2_per_objfile->just_read_cus)
     {
       if (! iter->is_debug_types)
 	compute_compunit_symtab_includes (iter);
     }
 
-  VEC_free (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus);
+  dwarf2_per_objfile->just_read_cus.clear ();
 }
 
 /* Generate full symbol information for PER_CU, whose DIEs have
@@ -10337,7 +10331,7 @@ process_full_comp_unit (struct dwarf2_per_cu_data *per_cu,
     }
 
   /* Push it for inclusion processing later.  */
-  VEC_safe_push (dwarf2_per_cu_ptr, dwarf2_per_objfile->just_read_cus, per_cu);
+  dwarf2_per_objfile->just_read_cus.push_back (per_cu);
 }
 
 /* Generate full symbol information for type unit PER_CU, whose DIEs have
diff --git a/gdb/dwarf2read.h b/gdb/dwarf2read.h
index fbac7171deb..74335d77db0 100644
--- a/gdb/dwarf2read.h
+++ b/gdb/dwarf2read.h
@@ -233,7 +233,7 @@ public:
   htab_t die_type_hash {};
 
   /* The CUs we recently read.  */
-  VEC (dwarf2_per_cu_ptr) *just_read_cus = NULL;
+  std::vector<dwarf2_per_cu_data *> just_read_cus;
 
   /* Table containing line_header indexed by offset and offset_in_dwz.  */
   htab_t line_header_hash {};
-- 
2.13.6