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# Copyright (C) 2009, 2011, 2012 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/>.

# Please email any bugs, comments, and/or additions to this file to
# the author.

# This file was written by Ian Lance Taylor <iant@google.com> based on
# fortran-torture.exp by Steven Bosscher and Rob Savoye.

load_lib target-supports.exp

# The default option list can be overridden by
# TORTURE_OPTIONS="{ { list1 } ... { listN } }"

if ![info exists TORTURE_OPTIONS] {
    set TORTURE_OPTIONS [list \
        { -O0 } { -O1 } { -O2 } \
        { -O2 -fomit-frame-pointer -finline-functions } \
        { -O2 -fomit-frame-pointer -finline-functions -funroll-loops } \
        { -O2 -fbounds-check } \
        { -O3 -g } \
        { -Os }]
}


#
# go-torture-compile -- compile a go.go-torture testcase.
#
# SRC is the full pathname of the testcase.
# OPTION is the specific compiler flag we're testing (eg: -O2).
#
proc go-torture-compile { src option } {
    global output
    global srcdir tmpdir
    global host_triplet

    set output "$tmpdir/[file tail [file rootname $src]].o"

    regsub "(?q)$srcdir/" $src "" testcase

    # If we couldn't rip $srcdir out of `src' then just do the best we can.
    # The point is to reduce the unnecessary noise in the logs.  Don't strip
    # out too much because different testcases with the same name can confuse
    # `test-tool'.
    if [string match "/*" $testcase] {
        set testcase "[file tail [file dirname $src]]/[file tail $src]"
    }

    verbose "Testing $testcase, $option" 1

    # Run the compiler and get results in comp_output.
    set options ""
    lappend options "additional_flags=-w $option"

    set comp_output [go_target_compile "$src" "$output" object $options]
    
    # See if we got something bad.
    set fatal_signal "*go*: Internal compiler error: program*got fatal signal"
 
    if [string match "$fatal_signal 6" $comp_output] then {
        go_fail $testcase "Got Signal 6, $option"
        catch { remote_file build delete $output }
        return
    }

    if [string match "$fatal_signal 11" $comp_output] then {
        go_fail $testcase "Got Signal 11, $option"
        catch { remote_file build delete $output }
        return
    }

    if [string match "*internal compiler error*" $comp_output] then {
        go_fail $testcase "$option (internal compiler error)"
        catch { remote_file build delete $output }
        return
    }

    # We shouldn't get these because of -w, but just in case.
    if [string match "*go*:*warning:*" $comp_output] then {
        warning "$testcase: (with warnings) $option"
        send_log "$comp_output\n"
        unresolved "$testcase, $option"
        catch { remote_file build delete $output }
        return
    }

    # Prune warnings we know are unwanted.
    set comp_output [prune_warnings $comp_output]

    # Report if the testcase is not supported.
    set unsupported_message [go_check_unsupported_p $comp_output]
    if { $unsupported_message != "" } {
        unsupported "$testcase: $unsupported_message"
        catch { remote_file build delete $output }
        return
    }

    # remove any leftover LF/CR to make sure any output is legit
    regsub -all -- "\[\r\n\]*" $comp_output "" comp_output

    # If any message remains, we fail.
    if ![string match "" $comp_output] then {
        go_fail $testcase $option
        catch { remote_file build delete $output }
        return
    }

    go_pass $testcase $option
    catch { remote_file build delete $output }
}


#
# go-torture-execute -- compile and execute a testcase.
#
# SRC is the full pathname of the testcase.
#
# If the testcase has an associated .x file, we source that to run the
# test instead.  We use .x so that we don't lengthen the existing filename
# to more than 14 chars.
#
proc go-torture-execute { src } {
    global output
    global srcdir tmpdir
    global tool
    global compiler_conditional_xfail_data
    global TORTURE_OPTIONS
    global go_compile_args
    global go_execute_args

    # Check for alternate driver.
    set additional_flags ""
    if [file exists [file rootname $src].x] {
        verbose "Using alternate driver [file rootname [file tail $src]].x" 2
        set done_p 0
        catch "set done_p \[source [file rootname $src].x\]"
        if { $done_p } {
            return
        }
    }

    # Setup the options for the testcase run.
    set option_list $TORTURE_OPTIONS
    set executable $tmpdir/[file tail [file rootname $src].x]
    regsub "(?q)$srcdir/" $src "" testcase

    if { ! [info exists go_compile_args] } {
        set go_compile_args ""
    }
    if { ! [info exists go_execute_args] } {
        set go_execute_args ""
    }

    # If we couldn't rip $srcdir out of `src' then just do the best we can.
    # The point is to reduce the unnecessary noise in the logs.  Don't strip
    # out too much because different testcases with the same name can confuse
    # `test-tool'.
    if [string match "/*" $testcase] {
        set testcase "[file tail [file dirname $src]]/[file tail $src]"
    }

    # Walk the list of options and copmile and run the testcase for all
    # options that are not explicitly disabled by the .x script (if present).
    foreach option $option_list {

        # Torture_{compile,execute}_xfail are set by the .x script.
        if [info exists torture_compile_xfail] {
            setup_xfail $torture_compile_xfail
        }

        # Torture_execute_before_{compile,execute} can be set by the .x script.
        if [info exists torture_eval_before_compile] {
            set ignore_me [eval $torture_eval_before_compile]
        }

        # FIXME: We should make sure that the modules required by this testcase
        # exist.  If not, the testcase should XFAIL.

        # Compile the testcase.
        catch { remote_file build delete $executable }
        verbose "Testing $testcase, $option" 1

        set options ""
        lappend options "additional_flags=-w $option"
        if { $additional_flags != "" } {
            lappend options "additional_flags=$additional_flags"
        }
        if { $go_compile_args != "" } {
            lappend options "additional_flags=$go_compile_args"
        }
        set comp_output [go_target_compile "$src" "$executable" executable $options]

        # See if we got something bad.
        set fatal_signal "*go*: Internal compiler error: program*got fatal signal"
        
        if [string match "$fatal_signal 6" $comp_output] then {
            go_fail $testcase "Got Signal 6, $option"
            catch { remote_file build delete $executable }
            continue
        }
        
        if [string match "$fatal_signal 11" $comp_output] then {
            go_fail $testcase "Got Signal 11, $option"
            catch { remote_file build delete $executable }
            continue
        }

        if [string match "*internal compiler error*" $comp_output] then {
            go_fail $testcase "$option (internal compiler error)"
            catch { remote_file build delete $executable }
            continue
        }
        
        # We shouldn't get these because of -w, but just in case.
        if [string match "*go*:*warning:*" $comp_output] then {
            warning "$testcase: (with warnings) $option"
            send_log "$comp_output\n"
            unresolved "$testcase, $option"
            catch { remote_file build delete $executable }
            continue
        }
        
        # Prune warnings we know are unwanted.
        set comp_output [prune_warnings $comp_output]

        # Report if the testcase is not supported.
        set unsupported_message [go_check_unsupported_p $comp_output]
        if { $unsupported_message != "" } {
            unsupported "$testcase: $unsupported_message"
            continue
        } elseif ![file exists $executable] {
            if ![is3way] {
                fail "$testcase compilation, $option"
                untested "$testcase execution, $option"
                continue
            } else {
                # FIXME: since we can't test for the existence of a remote
                # file without short of doing an remote file list, we assume
                # that since we got no output, it must have compiled.
                pass "$testcase compilation, $option"           
            }
        } else {
            pass "$testcase compilation, $option"
        }

        if [info exists torture_execute_xfail] {
            setup_xfail $torture_execute_xfail
        }

        if [info exists torture_eval_before_execute] {
            set ignore_me [eval $torture_eval_before_execute]
        }

        # Run the testcase, and analyse the output.
        set result [go_load "$executable" "$go_execute_args" ""]
        set status [lindex $result 0]
        set output [lindex $result 1]

        # In order to cooperate nicely with the master Go testsuite,
        # if the output contains the string BUG, we treat the test as
        # failing.
        if [ string match "*BUG*" $output ] {
            set status "fail"
        }

        if { $status == "pass" } {
            catch { remote_file build delete $executable }
        }
        $status "$testcase execution, $option"
    }
}


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


#
# go-torture -- the go-torture testcase source file processor
#
# This runs compilation only tests (no execute tests).
#
# SRC is the full pathname of the testcase, or just a file name in which
# case we prepend $srcdir/$subdir.
#
# If the testcase has an associated .x file, we source that to run the
# test instead.  We use .x so that we don't lengthen the existing filename
# to more than 14 chars.
#
proc go-torture { args } {
    global srcdir subdir
    global compiler_conditional_xfail_data
    global TORTURE_OPTIONS

    set src [lindex $args 0]
    if { [llength $args] > 1 } {
        set options [lindex $args 1]
    } else {
        set options ""
    }

    # Prepend $srdir/$subdir if missing.
    if ![string match "*/*" $src] {
        set src "$srcdir/$subdir/$src"
    }

    # Check for alternate driver.
    if [file exists [file rootname $src].x] {
        verbose "Using alternate driver [file rootname [file tail $src]].x" 2
        set done_p 0
        catch "set done_p \[source [file rootname $src].x\]"
        if { $done_p } {
            return
        }
    }
   
    # loop through all the options
    set option_list $TORTURE_OPTIONS
    foreach option $option_list {

        # torture_compile_xfail is set by the .x script (if present)
        if [info exists torture_compile_xfail] {
            setup_xfail $torture_compile_xfail
        }

        # torture_execute_before_compile is set by the .x script (if present)
        if [info exists torture_eval_before_compile] {
            set ignore_me [eval $torture_eval_before_compile]
        }

        go-torture-compile $src "$option $options"
    }
}

#
# add-ieee-options -- add options necessary for 100% ieee conformance.
#
proc add-ieee-options { } {
    # Ensure that excess precision does not cause problems.
    if { [istarget i?86-*-*]
         || [istarget m68k-*-*] } then {
      uplevel 1 lappend additional_flags "-ffloat-store"
    }

    # Enable full IEEE compliance mode.
    if { [istarget alpha*-*-*]
         || [istarget sh*-*-*] } then {
      uplevel 1 lappend additional_flags "-mieee"
    }
}