Fix VLA printing for Ada

While looking at a different Ada problem, I found that printing a
record containing a VLA did not work properly.

I tracked the problem down to dwarf2_evaluate_property trying, and
failing, to compare two types that differed only in qualifiers.

This patch changes dwarf2_evaluate_property to ignore qualifiers when
comparing types.

Tested on x86-64 Fedora 29.

gdb/ChangeLog
2019-05-08  Tom Tromey  <tromey@adacore.com>

	* dwarf2loc.c (dwarf2_evaluate_property) <PROP_ADDR_OFFSET>:
	Compare main types.

gdb/testsuite/ChangeLog
2019-05-08  Tom Tromey  <tromey@adacore.com>

	* gdb.ada/vla.exp: New file.
	* gdb.ada/vla/vla.adb: New file.

1 files changed, 57 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.ada/vla/vla.adb b/gdb/testsuite/gdb.ada/vla/vla.adb
new file mode 100644
index 00000000000..2b6cc8a1114
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/vla/vla.adb
@@ -0,0 +1,57 @@
+--  Copyright 2019 Free Software Foundation, Inc.
+--
+--  This program is free software; you can redistribute it and/or modify
+--  it under the terms of the GNU General Public License as published by
+--  the Free Software Foundation; either version 3 of the License, or
+--  (at your option) any later version.
+--
+--  This program is distributed in the hope that it will be useful,
+--  but WITHOUT ANY WARRANTY; without even the implied warranty of
+--  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+--  GNU General Public License for more details.
+--
+--  You should have received a copy of the GNU General Public License
+--  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+procedure Vla is
+   type Array_Type is array (Natural range <>) of Integer;
+   type Record_Type (L1, L2 : Natural) is record
+      I1 : Integer;
+      A1 : Array_Type (1 .. L1);
+      I2 : Integer;
+      A2 : Array_Type (1 .. L2);
+      I3 : Integer;
+   end record;
+
+   procedure Process (R : Record_Type) is
+   begin
+      null;
+   end Process;
+
+   R00 : Record_Type :=
+     (L1 => 0, L2 => 0,
+      I1 => 1, A1 => (others => 10),
+      I2 => 2, A2 => (others => 20),
+      I3 => 3);
+   R01 : Record_Type :=
+     (L1 => 0, L2 => 1,
+      I1 => 1, A1 => (others => 10),
+      I2 => 2, A2 => (others => 20),
+      I3 => 3);
+   R10 : Record_Type :=
+     (L1 => 1, L2 => 0,
+      I1 => 1, A1 => (others => 10),
+      I2 => 2, A2 => (others => 20),
+      I3 => 3);
+   R22 : Record_Type :=
+     (L1 => 2, L2 => 2,
+      I1 => 1, A1 => (others => 10),
+      I2 => 2, A2 => (others => 20),
+      I3 => 3);
+
+begin
+   Process (R00); -- Set breakpoint here
+   Process (R01);
+   Process (R10);
+   Process (R22);
+end Vla;