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#   Copyright (C) 1997, 1999, 2000, 2003, 2004, 2005, 2006, 2007
#   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/>.

load_lib dg.exp
load_lib file-format.exp
load_lib target-supports.exp
load_lib target-supports-dg.exp
load_lib scanasm.exp
load_lib scanrtl.exp
load_lib scantree.exp
load_lib scanipa.exp
load_lib prune.exp
load_lib libgloss.exp
load_lib target-libpath.exp

# We set LC_ALL and LANG to C so that we get the same error messages as expected.
setenv LC_ALL C
setenv LANG C

if ![info exists TORTURE_OPTIONS] {
    # It is theoretically beneficial to group all of the O2/O3 options together,
    # as in many cases the compiler will generate identical executables for
    # all of them--and the c-torture testsuite will skip testing identical
    # executables multiple times.
    # Also note that -finline-functions is explicitly included in one of the
    # items below, even though -O3 is also specified, because some ports may
    # choose to disable inlining functions by default, even when optimizing.
    set TORTURE_OPTIONS [list \
        { -O0 } \
        { -O1 } \
        { -O2 } \
        { -O3 -fomit-frame-pointer } \
        { -O3 -fomit-frame-pointer -funroll-loops } \
        { -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions } \
        { -O3 -g } \
        { -Os } ]
}

global GCC_UNDER_TEST
if ![info exists GCC_UNDER_TEST] {
    set GCC_UNDER_TEST "[find_gcc]"
}

global orig_environment_saved

# This file may be sourced, so don't override environment settings
# that have been previously setup.
if { $orig_environment_saved == 0 } {
    append ld_library_path [gcc-set-multilib-library-path $GCC_UNDER_TEST]
    set_ld_library_path_env_vars
}

# Split TORTURE_OPTIONS into two choices: one for testcases with loops and
# one for testcases without loops.

set torture_with_loops $TORTURE_OPTIONS
set torture_without_loops ""
foreach option $TORTURE_OPTIONS {
    if ![string match "*loop*" $option] {
        lappend torture_without_loops $option
    }
}

# Define gcc callbacks for dg.exp.

proc gcc-dg-test-1 { target_compile prog do_what extra_tool_flags } {
    # Set up the compiler flags, based on what we're going to do.

    set options [list]

    # Tests should be able to use "dg-do repo".  However, the dg test
    # driver checks the argument to dg-do against a list of acceptable
    # options, and "repo" is not among them.  Therefore, we resort to
    # this ugly approach.
    if [string match "*-frepo*" $extra_tool_flags] then {
        set do_what "repo"
    }

    switch $do_what {
        "preprocess" {
            set compile_type "preprocess"
            set output_file "[file rootname [file tail $prog]].i"
        }
        "compile" {
            set compile_type "assembly"
            set output_file "[file rootname [file tail $prog]].s"
        }
        "assemble" {
            set compile_type "object"
            set output_file "[file rootname [file tail $prog]].o"
        }
        "precompile" {
            set compile_type "precompiled_header"
            set output_file "[file tail $prog].gch"
        }
        "link" {
            set compile_type "executable"
            set output_file "[file rootname [file tail $prog]].exe"
            # The following line is needed for targets like the i960 where
            # the default output file is b.out.  Sigh.
        }
        "repo" {
            set compile_type "object"
            set output_file "[file rootname [file tail $prog]].o"
        }
        "run" {
            set compile_type "executable"
            # FIXME: "./" is to cope with "." not being in $PATH.
            # Should this be handled elsewhere?
            # YES.
            set output_file "./[file rootname [file tail $prog]].exe"
            # This is the only place where we care if an executable was
            # created or not.  If it was, dg.exp will try to run it.
            catch { remote_file build delete $output_file }
        }
        default {
            perror "$do_what: not a valid dg-do keyword"
            return ""
        }
    }

    if { $extra_tool_flags != "" } {
        lappend options "additional_flags=$extra_tool_flags"
    }

    set comp_output [$target_compile "$prog" "$output_file" "$compile_type" $options]

    # Look for an internal compiler error, which sometimes masks the fact
    # that we didn't get an expected error message.  An ICE always fails,
    # there's no way to XFAIL it.
    if [string match "*internal compiler error*" $comp_output] {
        upvar 2 name name
        fail "$name (internal compiler error)"
    }

    if { $do_what == "repo" } {
        set object_file "$output_file"
        set output_file "[file rootname [file tail $prog]].exe"
        set comp_output \
            [ concat $comp_output \
                  [$target_compile "$object_file" "$output_file" \
                       "executable" $options] ]
    }

    return [list $comp_output $output_file]
}

proc gcc-dg-test { prog do_what extra_tool_flags } {
    return [gcc-dg-test-1 gcc_target_compile $prog $do_what $extra_tool_flags]
}

proc gcc-dg-prune { system text } {
    global additional_prunes

    set text [prune_gcc_output $text]

    foreach p $additional_prunes {
        if { [string length $p] > 0 } {
            # Following regexp matches a complete line containing $p.
            regsub -all "(^|\n)\[^\n\]*$p\[^\n\]*" $text "" text
        }
    }

    # If we see "region xxx is full" then the testcase is too big for ram.
    # This is tricky to deal with in a large testsuite like c-torture so
    # deal with it here.  Just mark the testcase as unsupported.
    if [regexp "(^|\n)\[^\n\]*: region \[^\n\]* is full" $text] {
        # The format here is important.  See dg.exp.
        return "::unsupported::memory full"
    }

    return $text
}

# Replace ${tool}_load with a wrapper to provide for an expected nonzero
# exit status.  Multiple languages include this file so this handles them
# all, not just gcc.
if { [info procs ${tool}_load] != [list] \
      && [info procs saved_${tool}_load] == [list] } {
    rename ${tool}_load saved_${tool}_load

    proc ${tool}_load { program args } {
        global tool
        global shouldfail
        set result [eval [list saved_${tool}_load $program] $args]
        if { $shouldfail != 0 } {
            switch [lindex $result 0] {
                "pass" { set status "fail" }
                "fail" { set status "pass" }
            }
            set result [list $status [lindex $result 1]]
        }
        return $result
    }
}

# Utility routines.

#
# search_for -- looks for a string match in a file
#
proc search_for { file pattern } {
    set fd [open $file r]
    while { [gets $fd cur_line]>=0 } {
        if [string match "*$pattern*" $cur_line] then {
            close $fd
            return 1
        }
    }
    close $fd
    return 0
}

# Modified dg-runtest that can cycle through a list of optimization options
# as c-torture does.
proc gcc-dg-runtest { testcases default-extra-flags } {
    global runtests

    foreach test $testcases {
        # If we're only testing specific files and this isn't one of
        # them, skip it.
        if ![runtest_file_p $runtests $test] {
            continue
        }

        # Look for a loop within the source code - if we don't find one,
        # don't pass -funroll[-all]-loops.
        global torture_with_loops torture_without_loops
        if [expr [search_for $test "for*("]+[search_for $test "while*("]] {
            set option_list $torture_with_loops
        } else {
            set option_list $torture_without_loops
        }

        set nshort [file tail [file dirname $test]]/[file tail $test]

        foreach flags $option_list {
            verbose "Testing $nshort, $flags" 1
            dg-test $test $flags ${default-extra-flags}
        }
    }
}

proc gcc-dg-debug-runtest { target_compile trivial opt_opts testcases } {
    global srcdir subdir

    if ![info exists DEBUG_TORTURE_OPTIONS] {
        set DEBUG_TORTURE_OPTIONS ""
        foreach type {-gdwarf-2 -gstabs -gstabs+ -gxcoff -gxcoff+ -gcoff} {
            set comp_output [$target_compile \
                    "$srcdir/$subdir/$trivial" "trivial.S" assembly \
                    "additional_flags=$type"]
            if { ! [string match "*: target system does not support the * debug format*" \
                    $comp_output] } {
                foreach level {1 "" 3} {
                    lappend DEBUG_TORTURE_OPTIONS [list "${type}${level}"]
                    foreach opt $opt_opts {
                        lappend DEBUG_TORTURE_OPTIONS \
                                [list "${type}${level}" "$opt" ]
                    }
                }
            }
        }
    }

    verbose -log "Using options $DEBUG_TORTURE_OPTIONS"

    global runtests

    foreach test $testcases {
        # If we're only testing specific files and this isn't one of
        # them, skip it.
        if ![runtest_file_p $runtests $test] {
            continue
        }

        set nshort [file tail [file dirname $test]]/[file tail $test]

        foreach flags $DEBUG_TORTURE_OPTIONS {
            set doit 1

            # These tests check for information which may be deliberately
            # suppressed at -g1.
            if { ([string match {*/debug-[126].c} "$nshort"] \
                   || [string match {*/enum-1.c} "$nshort"] \
                   || [string match {*/enum-[12].C} "$nshort"]) \
                    && [string match "*1" [lindex "$flags" 0] ] } {
                set doit 0
            }

    # High optimization can remove the variable whose existence is tested.
    # Dwarf debugging with commentary (-dA) preserves the symbol name in the
    # assembler output, but stabs debugging does not.
    # http://gcc.gnu.org/ml/gcc-regression/2003-04/msg00095.html
            if { [string match {*/debug-[12].c} "$nshort"] \
                    && [string match "*O*" "$flags"] \
                    && ( [string match "*coff*" "$flags"] \
                         || [string match "*stabs*" "$flags"] ) } {
                set doit 0
            }

            if { $doit } {
                verbose -log "Testing $nshort, $flags" 1
                dg-test $test $flags ""
            }
        }
    }
}

# Prune any messages matching ARGS[1] (a regexp) from test output.
proc dg-prune-output { args } {
    global additional_prunes

    if { [llength $args] != 2 } {
        error "[lindex $args 1]: need one argument"
        return
    }

    lappend additional_prunes [lindex $args 1]
}

# Remove files matching the pattern from the build machine.
proc remove-build-file { pat } {
    verbose "remove-build-file `$pat'" 2
    set file_list "[glob -nocomplain $pat]"
    verbose "remove-build-file `$file_list'" 2
    foreach output_file $file_list {
        remote_file build delete $output_file
    }
}

# Remove compiler-generated coverage files for the current test.
proc cleanup-coverage-files { } {
    # This assumes that we are two frames down from dg-test or some other proc
    # that stores the filename of the testcase in a local variable "name".
    # A cleaner solution would require a new DejaGnu release.
    upvar 2 name testcase
    remove-build-file "[file rootname [file tail $testcase]].gc??"

    # Clean up coverage files for additional source files.
    if [info exists additional_sources] {
        foreach srcfile $additional_sources {
            remove-build-file "[file rootname [file tail $srcfile]].gc??"
        }
    }
}

# Remove compiler-generated files from -repo for the current test.
proc cleanup-repo-files { } {
    # This assumes that we are two frames down from dg-test or some other proc
    # that stores the filename of the testcase in a local variable "name".
    # A cleaner solution would require a new DejaGnu release.
    upvar 2 name testcase
    remove-build-file "[file rootname [file tail $testcase]].o"
    remove-build-file "[file rootname [file tail $testcase]].rpo"

    # Clean up files for additional source files.
    if [info exists additional_sources] {
        foreach srcfile $additional_sources {
            remove-build-file "[file rootname [file tail $srcfile]].o"
            remove-build-file "[file rootname [file tail $srcfile]].rpo"
        }
    }
}

# Remove compiler-generated RTL dump files for the current test.
#
# SUFFIX is the filename suffix pattern.
proc cleanup-rtl-dump { suffix } {
  cleanup-dump "\[0-9\]\[0-9\]\[0-9\]r.$suffix"
}

# Remove a specific tree dump file for the current test.
#
# SUFFIX is the tree dump file suffix pattern.
proc cleanup-tree-dump { suffix } {
  cleanup-dump "\[0-9\]\[0-9\]\[0-9\]t.$suffix"
}

# Remove a specific ipa dump file for the current test.
#
# SUFFIX is the ipa dump file suffix pattern.
proc cleanup-ipa-dump { suffix } {
  cleanup-dump "\[0-9\]\[0-9\]\[0-9\]i.$suffix"
}

# Remove all dump files with the provided suffix.
proc cleanup-dump { suffix } {
    # This assumes that we are three frames down from dg-test or some other
    # proc that stores the filename of the testcase in a local variable
    # "name".  A cleaner solution would require a new DejaGnu release.
    upvar 3 name testcase
    # The name might include a list of options; extract the file name.
    set src [file tail [lindex $testcase 0]]
    remove-build-file "[file tail $src].$suffix"

    # Clean up dump files for additional source files.
    if [info exists additional_sources] {
        foreach srcfile $additional_sources {
            remove-build-file "[file tail $srcfile].$suffix"
        }
    }
}

# Remove files kept by --save-temps for the current test.
#
# Currently this is only .i files, but more can be added if there are
# tests generating them.
proc cleanup-saved-temps { } {
    global additional_sources

    # This assumes that we are two frames down from dg-test or some other proc
    # that stores the filename of the testcase in a local variable "name".
    # A cleaner solution would require a new DejaGnu release.
    upvar 2 name testcase
    remove-build-file "[file rootname [file tail $testcase]].ii"
    remove-build-file "[file rootname [file tail $testcase]].i"

    # Clean up saved temp files for additional source files.
    if [info exists additional_sources] {
        foreach srcfile $additional_sources {
            remove-build-file "[file rootname [file tail $srcfile]].ii"
            remove-build-file "[file rootname [file tail $srcfile]].i"
        }
    }
}

# Remove files for specified Fortran modules.
proc cleanup-modules { modlist } {
    foreach modname $modlist {
        remove-build-file [string tolower $modname].mod
    }
}

# Verify that the compiler output file exists, invoked via dg-final.
proc output-exists { args } {
    # Process an optional target or xfail list.
    if { [llength $args] >= 1 } {
        switch [dg-process-target [lindex $args 0]] {
            "S" { }
            "N" { return }
            "F" { setup_xfail "*-*-*" }
            "P" { }
        }
    }

    # Access variables from gcc-dg-test-1.
    upvar 2 name testcase
    upvar 2 output_file output_file

    if [file exists $output_file] {
        pass "$testcase output-exists $output_file"
    } else {
        fail "$testcase output-exists $output_file"
    }
}

# Verify that the compiler output file does not exist, invoked via dg-final.
proc output-exists-not { args } {
    # Process an optional target or xfail list.
    if { [llength $args] >= 1 } {
        switch [dg-process-target [lindex $args 0]] {
            "S" { }
            "N" { return }
            "F" { setup_xfail "*-*-*" }
            "P" { }
        }
    }

    # Access variables from gcc-dg-test-1.
    upvar 2 name testcase
    upvar 2 output_file output_file

    if [file exists $output_file] {
        fail "$testcase output-exists-not $output_file"
    } else {
        pass "$testcase output-exists-not $output_file"
    }
}

# We need to make sure that additional_* are cleared out after every
# test.  It is not enough to clear them out *before* the next test run
# because gcc-target-compile gets run directly from some .exp files
# (outside of any test).  (Those uses should eventually be eliminated.)

# Because the DG framework doesn't provide a hook that is run at the
# end of a test, we must replace dg-test with a wrapper.

if { [info procs saved-dg-test] == [list] } {
    rename dg-test saved-dg-test

    proc dg-test { args } {
        global additional_files
        global additional_sources
        global additional_prunes
        global errorInfo
        global compiler_conditional_xfail_data
        global shouldfail

        if { [ catch { eval saved-dg-test $args } errmsg ] } {
            set saved_info $errorInfo
            set additional_files ""
            set additional_sources ""
            set additional_prunes ""
            set shouldfail 0
            if [info exists compiler_conditional_xfail_data] {
                unset compiler_conditional_xfail_data
            }
            error $errmsg $saved_info
        }
        set additional_files ""
        set additional_sources ""
        set additional_prunes ""
        set shouldfail 0
        if [info exists compiler_conditional_xfail_data] {
            unset compiler_conditional_xfail_data
        }
    }
}

set additional_prunes ""