#!/bin/bash

# This script is a helper to bisect GCC regressions.
# Inputs (as env. variables):
# EXP: name of .exp file to run
# TESTNAME: name of test to run
# TARGET
# CPU
# FPU
# MODE
# SIMU
# TARGETBOARD: additional test flags

# Check if the variable NAME is set
check_set()
{
    name=$1
    local val
    eval val=\$${name}
    [ x$val = x ] && echo $1 not set && exit 1
}

check_set EXP
check_set TESTNAME
check_set TARGET
#check_set CPU
#check_set FPU
#check_set MODE
#check_set SIMU

REV=$(git show --format=%H -s BISECT_HEAD)
echo AT "$(date)" BISECT TRYING: ${REV}
git --no-pager show $REV

set -x
cd ${RUNDIR} || exit

# Build list of gcc configure options depending on cpu/fpu/mode
GCC_OVERRIDE_CONFIGURE=
if [ x"${CPU}" != x ]; then
    GCC_OVERRIDE_CONFIGURE="${GCC_OVERRIDE_CONFIGURE} --set gcc_override_configure=--with-cpu=${CPU}"
fi
if [ x"${FPU}" != x ]; then
    GCC_OVERRIDE_CONFIGURE="${GCC_OVERRIDE_CONFIGURE} --set gcc_override_configure=--with-fpu=${FPU}"
fi
if [ x"${MODE}" != x ]; then
    GCC_OVERRIDE_CONFIGURE="${GCC_OVERRIDE_CONFIGURE} --set gcc_override_configure=--with-mode=${MODE}"
fi

${ABE}/abe.sh --target ${TARGET} \
      gcc=gcc.git@${REV} \
      --set runtestflags="${EXP}=${TESTNAME}" \
      ${GCC_OVERRIDE_CONFIGURE} \
      --build all \
      --check gcc\
      --excludecheck gdb >& gcc-${REV}.log
[ $? -ne 0 ] && exit 125

sums=`find builds/*/${TARGET}/*gcc.git~master_rev_${REV}-stage2/ -name "*.sum"`
nb_fail=$(cat $sums | grep -wc FAIL)
[ ${nb_fail} -gt ${GOODFAIL} ] && exit 1 # More failures than GOOD, this is a bad one

nb_pass=$(cat $sums | grep -wc PASS)
[ ${nb_pass} -ge ${GOODPASS} ] && exit 0 # At least as many passes as GOOD, this is a good one

exit 125 # something went wrong