[pushed] Fix one test case for gnat-llvm

[Tom Tromey <tromey@adacore.com>]

LLVM is a bit eager about removing unused locals.  Investigating this
test case showed that the problem was that some array bounds, which
are stored in artificial locals, are not emitted.

Since this isn't really germane to the test, and because real code
doesn't normally do this kind of thing, I think it's best to simply
update the test to preserve the bounds.

As this patch is Ada-specific, I am checking it in.
---
 gdb/testsuite/gdb.ada/enum_idx_packed/foo.adb | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/gdb/testsuite/gdb.ada/enum_idx_packed/foo.adb b/gdb/testsuite/gdb.ada/enum_idx_packed/foo.adb
index 27e2e7257d5..48509b75730 100644
--- a/gdb/testsuite/gdb.ada/enum_idx_packed/foo.adb
+++ b/gdb/testsuite/gdb.ada/enum_idx_packed/foo.adb
@@ -30,12 +30,39 @@ procedure Foo is
                                             Green => (5, 6, 7),
                                             others => (others => 72));
 
+   --  These variables ensure the bounds aren't elided by LLVM.
+   Small_First : Color := Small'First;
+   Small_Last : Color := Small'Last;
+   Multi_First1 : Color := Multi'First (1);
+   Multi_Last1 : Color := Multi'Last (1);
+   Multi_First2 : Strength := Multi'First (2);
+   Multi_Last2 : Strength := Multi'Last (2);
+
+   MM_First1 : Positive := Multi_Multi'First (1);
+   MM_Last1 : Positive := Multi_Multi'Last (1);
+   MM_First2 : Positive := Multi_Multi'First (2);
+   MM_Last2 : Positive := Multi_Multi'Last (2);
+   MM_First3 : Positive := Multi_Multi'First (3);
+   MM_Last3 : Positive := Multi_Multi'Last (3);
+
 begin
    Do_Nothing (Full'Address);  -- STOP
    Do_Nothing (Primary'Address);
    Do_Nothing (Cold'Address);
    Do_Nothing (Small'Address);
+   Do_Nothing (Small_First'Address);
+   Do_Nothing (Small_Last'Address);
    Do_Nothing (Multi'Address);
+   Do_Nothing (Multi_First1'Address);
+   Do_Nothing (Multi_Last1'Address);
+   Do_Nothing (Multi_First2'Address);
+   Do_Nothing (Multi_Last2'Address);
    Do_Nothing (Multi_Multi'Address);
    Do_Nothing (Multi_Access'Address);
+   Do_Nothing (MM_First1'Address);
+   Do_Nothing (MM_Last1'Address);
+   Do_Nothing (MM_First2'Address);
+   Do_Nothing (MM_Last2'Address);
+   Do_Nothing (MM_First3'Address);
+   Do_Nothing (MM_Last3'Address);
 end Foo;

base-commit: bc145a24033381e93bae0ee24add664386c66433
-- 
2.53.0