[Bug ada/83892] Various ICEs and link-errors with running ACATS with -O2 -g -flto

[simon at pushface dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83892

--- Comment #6 from simon at pushface dot org ---
I tried check-gnat, which also shows additional lto-related failures.

Running with lto shows 5 additional FAILs (and 3 fewer PASSes???)

LTO:

Running target unix/-flto/-g0
...
                === gnat Summary ===

# of expected passes            2673
# of unexpected failures        16
# of expected failures          24
# of unsupported tests          7
/Volumes/Miscellaneous/tmp/gcc-256927-build/gcc/gnatmake version 8.0.1 20180121
(experimental)

No LTO:

Running target unix/-g
...
                === gnat Summary ===

# of expected passes            2676
# of unexpected failures        11
# of expected failures          24
# of unsupported tests          7
/Volumes/Miscellaneous/tmp/gcc-256927-build/gcc/gnatmake version 8.0.1 20180121
(experimental)