foot/pgo/pgo.sh

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#!/bin/sh
set -eu
usage_and_die() {
echo "Usage: ${0} none|partial|full-current-session|full-headless-sway|full-headless-cage|[auto] <source-dir> <build-dir> [meson options]"
exit 1
}
[ ${#} -ge 3 ] || usage_and_die
mode=${1}
srcdir=$(realpath "${2}")
blddir=$(realpath "${3}")
shift 3
# if [ -e "${blddir}" ]; then
# echo "error: ${blddir}: build directory already exists"
# exit 1
# fi
if [ ! -f "${srcdir}"/generate-version.sh ]; then
echo "error: ${srcdir}: does not appear to be a foot source directory"
exit 1
fi
compiler=other
do_pgo=no
CFLAGS="${CFLAGS-} -O3"
case $(${CC-cc} --version) in
*GCC*)
compiler=gcc
do_pgo=yes
;;
*clang*)
compiler=clang
if command -v llvm-profdata > /dev/null; then
do_pgo=yes
CFLAGS="${CFLAGS} -Wno-ignored-optimization-argument"
fi
;;
esac
case ${mode} in
partial|full-current-session|full-headless-sway|full-headless-cage)
;;
none)
do_pgo=no
;;
auto)
# TODO: once Sway 1.6.2 has been released, prefer
# full-headless-sway
if [ -n "${WAYLAND_DISPLAY+x}" ]; then
mode=full-current-session
# elif command -v sway > /dev/null; then # Requires 1.6.2
# mode=full-headless-sway
elif command -v cage > /dev/null; then
mode=full-headless-cage
else
mode=partial
fi
;;
*)
usage_and_die
;;
esac
set -x
# echo "source: ${srcdir}"
# echo "build: ${blddir}"
# echo "compiler: ${compiler}"
# echo "mode: ${mode}"
# echo "CFLAGS: ${CFLAGS}"
export CFLAGS
meson setup --buildtype=release -Db_lto=true "${@}" "${blddir}" "${srcdir}"
if [ ${do_pgo} = yes ]; then
find "${blddir}" \
'(' \
-name "*.gcda" -o \
-name "*.profraw" -o \
-name default.profdata \
')' \
-delete
meson configure "${blddir}" -Db_pgo=generate
ninja -C "${blddir}"
# If fcft/tllist are subprojects, we need to ensure their tests
# have been executed, or well get “profile count data file not
# found” errors.
ninja -C "${blddir}" test
# Run mode-dependent script to generate profiling data
"${srcdir}"/pgo/${mode}.sh "${srcdir}" "${blddir}"
if [ ${compiler} = clang ]; then
llvm-profdata \
merge \
"${blddir}"/default_*.profraw \
--output="${blddir}"/default.profdata
fi
meson configure "${blddir}" -Db_pgo=use
fi
ninja -C "${blddir}"