gcc-dg.exp

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

#   Copyright (C) 1997, 1999, 2000 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 2 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  

load_lib dg.exp
load_lib file-format.exp
load_lib target-supports.exp
load_lib scanasm.exp
load_lib prune.exp

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 } ]
}


# 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 { prog do_what extra_tool_flags } {
    # Set up the compiler flags, based on what we're going to do.

    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"
	}
	"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.
	}
	"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.
	    remote_file build delete $output_file;
	}
	default {
	    perror "$do_what: not a valid dg-do keyword"
	    return ""
	}
    }
    set options ""
    if { $extra_tool_flags != "" } {
	lappend options "additional_flags=$extra_tool_flags"
    }

    set comp_output [gcc_target_compile "$prog" "$output_file" "$compile_type" $options];

    return [list $comp_output $output_file]
}

proc gcc-dg-prune { system text } {
    set text [prune_gcc_output $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
}

# 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}
	}
    }
}