#   Copyright (C) 2017-2021 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 GCC; see the file COPYING3.  If not see
# <http://www.gnu.org/licenses/>.

# Test link-time optimization across multiple files.
#
# Programs are broken into multiple files.  Each one is compiled
# separately with LTO information.  The final executable is generated
# by collecting all the generated object files using regular LTO or WHOPR.

if $tracelevel then {
    strace $tracelevel
}

# Load procedures from common libraries.
load_lib standard.exp
load_lib gdc-dg.exp

# Load the language-independent compabibility support procedures.
load_lib lto.exp

# If LTO has not been enabled, bail.
if { ![check_effective_target_lto] } {
    return
}

# Likewise if the D runtime library is missing.
if { ![check_effective_target_d_runtime] } {
    return
}

lto_init no-mathlib

# Define an identifier for use with this suite to avoid name conflicts
# with other lto tests running at the same time.
set sid "d_lto"

# Main loop.
foreach src [lsort [find $srcdir/$subdir *_0.d]] {
    # If we're only testing specific files and this isn't one of them, skip it.
    if ![runtest_file_p $runtests $src] then {
	continue
    }

    lto-execute $src $sid
}

lto_finish