[Bug lto/94848] [Offloading][LTO] error due to only partially eliminated var / -ftree-pre causes link errors | libgomp.fortran/use_device_ptr-optional-3.f90 failures

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94848

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Thomas Schwinge <tschwinge@gcc.gnu.org>:

https://gcc.gnu.org/g:5864930754f63e2dcef9606f2514ae20e80f436e

commit r11-1466-g5864930754f63e2dcef9606f2514ae20e80f436e
Author: Thomas Schwinge <thomas@codesourcery.com>
Date:   Tue Jan 7 17:40:14 2020 +0100

    Add 'dg-do run' to 'libgomp.fortran/use_device_ptr-optional-3.f90'
[PR94848]

    Fix-up for r279858/commit f760c0c77fe350616da9dbeaea16442b0acfb09c
"Fortran]
    OpenMP/OpenACC â fix more issues with OPTIONAL".

    With offloading enabled, we then saw:

        PASS: libgomp.fortran/use_device_ptr-optional-3.f90   -O0  (test for
excess errors)
        PASS: libgomp.fortran/use_device_ptr-optional-3.f90   -O0  execution
test
        PASS: libgomp.fortran/use_device_ptr-optional-3.f90   -O1  (test for
excess errors)
        PASS: libgomp.fortran/use_device_ptr-optional-3.f90   -O1  execution
test
        FAIL: libgomp.fortran/use_device_ptr-optional-3.f90   -O2  (test for
excess errors)
        UNRESOLVED: libgomp.fortran/use_device_ptr-optional-3.f90   -O2 
compilation failed to produce executable
        FAIL: libgomp.fortran/use_device_ptr-optional-3.f90   -O3
-fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions 
(test for excess errors)
        UNRESOLVED: libgomp.fortran/use_device_ptr-optional-3.f90   -O3
-fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions 
compilation failed to produce executable
        FAIL: libgomp.fortran/use_device_ptr-optional-3.f90   -O3 -g  (test for
excess errors)
        UNRESOLVED: libgomp.fortran/use_device_ptr-optional-3.f90   -O3 -g 
compilation failed to produce executable
        FAIL: libgomp.fortran/use_device_ptr-optional-3.f90   -Os  (test for
excess errors)
        UNRESOLVED: libgomp.fortran/use_device_ptr-optional-3.f90   -Os 
compilation failed to produce executable

     ... due to:

        /tmp/cciVc43I.o:(.gnu.offload_vars+0x10): undefined reference to
`A.12.4064'
        [...]

    ..., but after the recent PR94848, PR95551 changes, that problem is now
gone.

            libgomp/
            PR lto/94848
            * testsuite/libgomp.fortran/use_device_ptr-optional-3.f90: Add
            'dg-do run'.