#!/bin/sh
# This script automatically test the given tool with the tool's test cases,
# reporting anything of interest.

# Written by Mike Stump <mrs@cygnus.com>
# Subdir comparison added by Quentin Neill <quentin.neill@amd.com>
# Modified by Yvan Roux <yvan.roux@linaro.org> and
# Christophe Lyon <christophe.lyon@linaro.org>
usage()
{
	if [ -n "$1" ] ; then
		echo "$0: Error: $1" >&2
		echo >&2
	fi
	cat >&2 <<EOUSAGE
Usage: $0 [-strict] [-target target-triplet] PREVIOUS CURRENT

Compare the PREVIOUS and CURRENT test case .sum files, reporting anything of interest.

	If PREVIOUS and CURRENT are directories, find and compare any *.sum files.

	Unless -strict is given, these discrepancies are not counted as errors:
		missing/extra .sum files when comparing directories
		tests that failed in PREVIOUS but pass in CURRENT
		tests that were not in PREVIOUS but appear in CURRENT
		tests in PREVIOUS that are missing in CURRENT

        -target enables to provide the target name to use when parsing
         the file containing the list of unstable tests.

	Exit with the following values:
		0 if there is nothing of interest
		1 if there are errors when comparing single test case files
		N for the number of errors found when comparing directories
EOUSAGE
	exit 2
}

export LC_ALL=C

me="`which $0`"
my_path="`dirname ${me}`"

tool=gxx

tmp1=/tmp/$tool-testing.$$a
tmp2=/tmp/$tool-testing.$$b
now_s=/tmp/$tool-testing.$$d
before_s=/tmp/$tool-testing.$$e
lst1=/tmp/$tool-lst1.$$
lst2=/tmp/$tool-lst2.$$
lst3=/tmp/$tool-lst3.$$
lst4=/tmp/$tool-lst4.$$
lst5=/tmp/$tool-lst5.$$
sum1=/tmp/$tool-sum1.$$
sum2=/tmp/$tool-sum2.$$
tmps="$tmp1 $tmp2 $now_s $before_s $lst1 $lst2 $lst3 $lst4 $lst5 $sum1 $sum2"

[ "$1" = "-strict" ] && strict=$1 && shift
[ "$1" = "-target" ] && target=$2 && shift 2
[ "$1" = "-?" ] && usage
[ "$2" = "" ] && usage "Must specify both PREVIOUS and CURRENT"

trap "rm -f $tmps" 0 1 2 3 5 9 13 15
exit_status=0

if [ -d "$1" -a -d "$2" ] ; then
	find "$1/" \( -name '*.sum.xz' ! -name '*go.sum.xz' ! -name 'libgo-all.sum.xz' \)>$lst1
	find "$2/" \( -name '*.sum.xz' ! -name '*go.sum.xz' ! -name 'libgo-all.sum.xz' \)>$lst2
	echo "# Comparing directories"
	echo "# REFERENCE: $1"
	echo "# CURRENT:   $2"
	echo
	# remove leading directory components to compare
	sed -e "s|^$1[/]*||" $lst1 | sort >$lst3
	sed -e "s|^$2[/]*||" $lst2 | sort >$lst4
	comm -23 $lst3 $lst4 >$lst5
	if [ -s $lst5 ] ; then
		echo "# Extra sum files in Dir1=$1"
		sed -e "s|^|< $1/|" $lst5
		echo
		[ -n "$strict" ] && exit_status=`expr $exit_status + 1`
	fi
	comm -13 $lst3 $lst4 >$lst5
	if [ -s $lst5 ] ; then
		echo "# Extra sum files in Dir2=$2"
		sed -e "s|^|> $2/|" $lst5
		echo
		[ -n "$strict" ] && exit_status=`expr $exit_status + 1`
	fi
	comm -12 $lst3 $lst4 | sort -u >$lst5
	if [ ! -s $lst5 ] ; then
		echo "# No common sum files"
		exit_status=`expr $exit_status + 1`
		exit $exit_status
	fi
	cmnsums=`cat $lst5 | wc -l`
	echo "# Comparing $cmnsums common sum files:"
	cat $lst5
	( for fname in `cat $lst5`; do xzcat $1/$fname | sed -r 's:of file /home.*/gcc/:of file :;s:==[0-9]+==:==X==:;s/output pattern test,.*$/output pattern XXX/'; done ) >$sum1
	( for fname in `cat $lst5`; do xzcat $2/$fname | sed -r 's:of file /home.*/gcc/:of file :;s:==[0-9]+==:==X==:;s/output pattern test,.*$/output pattern XXX/'; done ) >$sum2
	# At some point, we'll add --no-unstable --unstable-test=${my_path}/unstable-tests.txt
	if [ "x${target}" != "x" ] ; then
	    target="--target ${target}"
	fi
	${CONFIG_SHELL-/usr/bin/perl} ${my_path}/compare_dg_tests.pl -l --unstable-test=${my_path}/unstable-tests.txt ${target} $sum1 $sum2
	ret=$?
	if [ $ret -eq 2 ]; then
		exit_status=`expr $exit_status + 1`
		echo "# Regressions found"
	else
	    if [ $ret -eq 1 ]; then
		echo "# Improvements found"
	    fi
	fi
	if [ $exit_status -ne 0 ]; then
		echo "# Regressions in $cmnsums common sum files found"
	else
		echo "# No regression found in $cmnsums common sum files"
	fi
	exit $exit_status
elif [ -d "$1" -o -d "$2" ] ; then
	usage "Must specify either two directories or two files"
fi