Allow really large fortran array bounds: fortran type/value printers

This is the fortran part of the patch, including tests, which
are essentially unchanged from Siddhesh's original 2012 submission:

  https://sourceware.org/ml/gdb-patches/2012-08/msg00562.html

There is, however, one large departure.  In the above thread,
Jan pointed out problems with GCC debuginfo for -m32 builds
(filed usptream as gcc/54934).  After investigating the issue,
I am dropping the hand-tweaked assembler source file to workaround
this case.

While I would normally do something to accommodate this, in
this case, given the ubiquity of 64-bit systems today (where
the tests pass) and the apparent lack of urgency on the compiler
side (by users), I don't think the additional complexity and
maintenance costs are worth it. It will be very routinely tested
on 64-bit systems. [For example, at Red Hat, we always
test -m64 and -m32 configurations for all GDB releases.]

gdb/ChangeLog:

	From Siddhesh Poyarekar:
	* f-lang.h (f77_get_upperbound): Return LONGEST.
	(f77_get_lowerbound): Likewise.
	* f-typeprint.c (f_type_print_varspec_suffix): Expand
	UPPER_BOUND and LOWER_BOUND to LONGEST.  Use plongest to format
	print them.
	(f_type_print_base): Expand UPPER_BOUND to LONGEST.  Use
	plongest to format print it.
	* f-valprint.c (f77_get_lowerbound): Return LONGEST.
	(f77_get_upperbound): Likewise.
	(f77_get_dynamic_length_of_aggregate): Expand UPPER_BOUND,
	LOWER_BOUND to LONGEST.
	(f77_create_arrayprint_offset_tbl): Likewise.

gdb/testsuite/ChangeLog:

	* gdb.fortran/array-bounds.exp: New file.
	* gdb.fortran/array-bounds.f90: New file.

3 files changed, 81 insertions, 0 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index ced2577..57f53b5 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-03-29  Keith Seitz  <keiths@redhat.com>
+
+	* gdb.fortran/array-bounds.exp: New file.
+	* gdb.fortran/array-bounds.f90: New file.
+
 2019-03-28  Philippe Waroquiers  <philippe.waroquiers@skynet.be>
 
 	* gdb.multi/multi-term-settings.c (main): Increase alarm timer.
diff --git a/gdb/testsuite/gdb.fortran/array-bounds.exp b/gdb/testsuite/gdb.fortran/array-bounds.exp
new file mode 100644
index 0000000..e18530c
--- /dev/null
+++ b/gdb/testsuite/gdb.fortran/array-bounds.exp
@@ -0,0 +1,50 @@
+# Copyright 2012-2019 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/>.
+
+# This file is part of the gdb testsuite.  It contains test to ensure that
+# array bounds accept LONGEST.
+
+if { [skip_fortran_tests] } { return -1 }
+
+set testfile "array-bounds"
+standard_testfile .f90
+
+if {[prepare_for_testing $testfile.exp $testfile $srcfile {f90 debug}]} {
+    return -1
+}
+
+if {![runto MAIN__]} {
+    perror "Could not run to breakpoint `MAIN__'."
+    continue
+}
+
+# Convenience proc to setup for KFAIL
+proc kfail_if {exp bugid triplet} {
+    if {$exp} {
+	setup_kfail $bugid $triplet
+    }
+}
+
+# GCC outputs incorrect range debug info for -m32.
+set expect_fail false
+if {[is_ilp32_target] && ([istarget "i\[34567\]86-*-linux*"]
+			  || [istarget "x86_64-*-linux*"])} {
+    set expect_fail true
+}
+
+kfail_if $expect_fail "gcc/54934" "*-*-*"
+gdb_test "print &foo" {.*\(4294967296:4294967297\).*}
+kfail_if $expect_fail "gcc/54934" "*-*-*"
+gdb_test "print &bar" {.*\(-4294967297:-4294967296\).*}
diff --git a/gdb/testsuite/gdb.fortran/array-bounds.f90 b/gdb/testsuite/gdb.fortran/array-bounds.f90
new file mode 100644
index 0000000..ec3c469
--- /dev/null
+++ b/gdb/testsuite/gdb.fortran/array-bounds.f90
@@ -0,0 +1,26 @@
+! Copyright 2012-2019 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/>.
+
+      dimension foo(4294967296_8:4294967297_8)
+      dimension bar(-4294967297_8:-4294967296_8)
+      integer(8) :: lb, ub
+      bar = 42
+      foo = bar
+      lb = lbound (foo, dim = 1, kind = 8)
+      ub = ubound (foo, dim = 1, kind = 8)
+      print *, 'bounds of foo - ', lb, ':', ub
+      stop
+      end
+