[Bug debug/81569] New: gcc.guality tests fail with -flto option

[sje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81569

            Bug ID: 81569
           Summary: gcc.guality tests fail with -flto option
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sje at gcc dot gnu.org
  Target Milestone: ---
              Host: aarch64-*-*
            Target: aarch64-*-*
             Build: aarch64-*-*

Created attachment 41838
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41838&action=edit
Test case (same as gcc.dg/guality/pr45882.c)

A number of gcc.guality tests like gcc.dg/guality/pr45882.c fail on aarch64
when compiled with -flto.  The tests work when compiled with -O0 -g or with -O2
-g, but fail with -O2 -flto -g.

I have attached the source of gcc.dg/guality/pr45882.c to this test, if you
compile it and debug it and give gdb the following commands:

break 16
run
print e
quit

gdb will print 142 when debugging a program that was compiled without -flto
and 0 when debugging a program compiled with -flto.