# Contributor: Rasmus Thomsen <oss@cogitri.dev>
# Contributor: Martell Malone <martell@marinelayer.io>
# Contributor: Travis Tilley <ttilley@gmail.com>
# Contributor: Mitch Tishmack <mitch.tishmack@gmail.com>
# Contributor: Jakub Jirutka <jakub@jirutka.cz>
# Contributor: Ariadne Conill <ariadne@dereferenced.org>
# Contributor: omni <omni+alpine@hack.org>
# Maintainer: Rasmus Thomsen <oss@cogitri.dev>
_pkgname=llvm
pkgver=14.0.6
_majorver=${pkgver%%.*}
pkgname=$_pkgname$_majorver
pkgrel=15
pkgdesc="Low Level Virtual Machine compiler system, version $_majorver"
arch="all"
url="https://llvm.org/"
license="Apache-2.0"
install="$pkgname.pre-upgrade"
depends_dev="$pkgname=$pkgver-r$pkgrel"
# See https://gitlab.alpinelinux.org/alpine/aports/-/commit/51d2fba931fb2ef0046dea19405a9290c8735051#note_234651
[ -z "$BOOTSTRAP" ] && depends_dev="$depends_dev $pkgname-test-utils=$pkgver-r$pkgrel"
makedepends_host="binutils-dev libffi-dev zlib-dev libxml2-dev"
makedepends_build="cmake chrpath python3 py3-setuptools samurai"
# diffutils for diff: unrecognized option: strip-trailing-cr
# coreutils for 'od' binary
checkdepends="bash coreutils diffutils"
subpackages="$pkgname-static $pkgname-libs $pkgname-dev $pkgname-test-utils:_test_utils"
source="https://github.com/llvm/llvm-project/releases/download/llvmorg-$pkgver/llvm-$pkgver.src.tar.xz
	0001-Disable-dynamic-lib-tests-for-musl-s-dlclose-is-noop.patch
	allocscore.patch
	fix-memory-mf_exec-on-aarch64.patch
	install-prefix.patch
	lfs64.patch
	llvm-stack-size.patch
	"
builddir="$srcdir/$_pkgname-$pkgver.src"

# Whether is this package the default (latest) LLVM version.
_default_llvm="no"

# If crosscompiling, we need llvm-tblgen on the build machine.
if [ "$CBUILD" != "$CHOST" ]; then
	_llvm_tblgen="llvm-tblgen"
	if [ "$_default_llvm" = no ]; then
		_llvm_tblgen="llvm$_majorver-tblgen"
	fi
	makedepends_build="$makedepends_build cmd:$_llvm_tblgen"
	cmake_cross_options="
		-DCMAKE_CROSSCOMPILING=ON
		-DLLVM_TABLEGEN=/usr/bin/$_llvm_tblgen
	"
fi

if [ "$_default_llvm" = yes ]; then
	provides="llvm=$pkgver-r$pkgrel"
	replaces="llvm"
fi

# explicit override for previous version as well
replaces="llvm13"

# NOTE: It seems that there's no (sane) way how to change includedir, sharedir
# etc. separately, just the CMAKE_INSTALL_PREFIX. Standard CMake variables and
# even  LLVM-specific variables, that are related to these paths, actually
# don't work (in llvm 3.7).
#
# When building a software that depends on LLVM, utility llvm-config should be
# used to discover where is LLVM installed. It provides options to print
# path of bindir, includedir, and libdir separately, but in its source, all
# these paths are actually hard-coded against INSTALL_PREFIX. We can patch it
# and move paths manually, but I'm really not sure what it may break...
#
# Also note that we should *not* add version suffix to files in llvm bindir!
# It breaks build system of some software that depends on LLVM, because they
# don't expect these files to have a sufix.
#
# So, we install all the LLVM files into /usr/lib/llvm$_majorver.
# BTW, Fedora and Debian do the same thing.
#
_prefix="usr/lib/llvm$_majorver"

prepare() {
	default_prepare

	# Substitute python hashbangs with python3
	find . -name '*.py' -type f -exec \
		sed -i 's,^#!/usr/bin/env python$,#!/usr/bin/env python3,' {} +
	find utils -type f -exec \
		sed -i 's,^#!/usr/bin/env python$,#!/usr/bin/env python3,' {} +
	find runtimes -type f -exec \
		sed -i 's,^#!/usr/bin/env python$,#!/usr/bin/env python3,' {} +

	# Known broken test on musl
	rm -v test/CodeGen/AArch64/wineh4.mir
	# https://github.com/llvm/llvm-project/issues/47657
	rm -v test/ExecutionEngine/Interpreter/intrinsics.ll

	case "$CARCH" in
	x86) rm -v test/Object/macho-invalid.test \
		test/tools/llvm-size/radix.test
		;;
	armv7) rm -v test/tools/llvm-readobj/ELF/dependent-libraries.test \
		test/Object/macho-invalid.test \
		test/tools/llvm-size/radix.test \
		test/tools/llvm-dwarfdump/X86/prettyprint_types.s \
		test/tools/llvm-dwarfdump/X86/simplified-template-names.s
		;;
	armhf) rm -v test/tools/llvm-readobj/ELF/dependent-libraries.test \
		test/Object/macho-invalid.test \
		test/tools/gold/X86/split-dwarf.ll \
		test/tools/llvm-size/radix.test \
		test/ExecutionEngine/frem.ll \
		test/tools/llvm-dwarfdump/X86/prettyprint_types.s \
		test/tools/llvm-dwarfdump/X86/simplified-template-names.s \
		unittests/ExecutionEngine/Orc/OrcCAPITest.cpp
		sed -i "/OrcCAPITest.cpp/d" \
			unittests/ExecutionEngine/Orc/CMakeLists.txt
		;;
	esac

	# Known broken codegen for Hexagon target, reported upstream.
	# https://github.com/llvm/llvm-project/issues/48936
	rm -v \
		test/CodeGen/Hexagon/csr-stubs-spill-threshold.ll \
		test/CodeGen/Hexagon/long-calls.ll \
		test/CodeGen/Hexagon/mlong-calls.ll \
		test/CodeGen/Hexagon/pic-regusage.ll \
		test/CodeGen/Hexagon/runtime-stkchk.ll \
		test/CodeGen/Hexagon/swp-memrefs-epilog.ll \
		test/CodeGen/Hexagon/vararg-formal.ll \
		test/tools/llvm-objcopy/MachO/universal-object.test \
		test/DebugInfo/X86/vla-multi.ll

	# XXX: fail when built with gcc13
	rm -v \
		test/CodeGen/X86/vector-interleaved-load-i32-stride-4.ll \
		test/Transforms/SampleProfile/pseudo-probe-update-2.ll \
		test/Transforms/SampleProfile/pseudo-probe-update.ll
}

build() {
	# Auto-detect it by guessing either.
	local ffi_include_dir="$(pkg-config --cflags-only-I libffi | sed 's|^-I||g')"
	case "$CARCH" in
		x86) LDFLAGS="$LDFLAGS -Wl,--no-keep-memory";; # avoid exhausting memory limit
	esac

	# NOTE: DO NOT change CMAKE_BUILD_TYPE! Buildmodes like None will enable
	# debug assertions for LLVM!
	cmake -B build -G Ninja -Wno-dev \
		-DCMAKE_BUILD_TYPE=Release \
		-DCMAKE_INSTALL_PREFIX=/$_prefix \
		-DFFI_INCLUDE_DIR="$ffi_include_dir" \
		-DLLVM_BINUTILS_INCDIR=/usr/include \
		-DLLVM_BUILD_DOCS=OFF \
		-DLLVM_BUILD_EXAMPLES=OFF \
		-DLLVM_BUILD_EXTERNAL_COMPILER_RT=ON \
		-DLLVM_BUILD_LLVM_DYLIB=ON \
		-DLLVM_BUILD_TESTS="$(want_check && echo ON || echo OFF)" \
		-DLLVM_DEFAULT_TARGET_TRIPLE="$CBUILD" \
		-DLLVM_ENABLE_ASSERTIONS=OFF \
		-DLLVM_ENABLE_FFI=ON \
		-DLLVM_ENABLE_LIBCXX=OFF \
		-DLLVM_ENABLE_LIBEDIT=OFF \
		-DLLVM_ENABLE_PIC=ON \
		-DLLVM_ENABLE_RTTI=ON \
		-DLLVM_ENABLE_SPHINX=OFF \
		-DLLVM_ENABLE_TERMINFO=ON \
		-DLLVM_ENABLE_ZLIB=ON \
		-DLLVM_INSTALL_UTILS=ON \
		-DLLVM_HOST_TRIPLE="$CHOST" \
		-DLLVM_INCLUDE_EXAMPLES=OFF \
		-DLLVM_LINK_LLVM_DYLIB=ON \
		-DLLVM_APPEND_VC_REV=OFF \
		-DLLVM_INCLUDE_BENCHMARKS=OFF \
		$cmake_cross_options

	cmake --build build --target llvm-tblgen
	cmake --build build

	python3 utils/lit/setup.py build
}

check() {
	ninja -C build check-llvm
}

package() {
	DESTDIR="$pkgdir" cmake --install build

	cd "$pkgdir"/$_prefix

	# Remove RPATHs.
	file lib/*.so bin/* \
		| awk -F: '$2~/ELF/{print $1}' \
		| xargs -r chrpath -d

	# Symlink files from /usr/lib/llvm*/bin to /usr/bin.
	mkdir -p "$pkgdir"/usr/bin
	local name newname path
	for path in bin/*; do
		name=${path##*/}
		# Add version infix/suffix to the executable name.
		case "$name" in
			llvm-*) newname="llvm$_majorver-${name#llvm-}";;
			*) newname="$name$_majorver";;
		esac
		# If this package provides=llvm (i.e. it's the default/latest
		# llvm package), omit version infix/suffix.
		if [ "$_default_llvm" = yes ]; then
			newname=$name
		fi
		case "$name" in
			FileCheck | obj2yaml | yaml2obj) continue;;
		esac
		ln -s ../lib/llvm$_majorver/bin/$name "$pkgdir"/usr/bin/$newname
	done

	mkdir -p "$pkgdir"/usr/include "$pkgdir"/usr/lib/cmake

	# symlink include to /usr/include/llvm$_llvmver
	ln -sfv ../lib/$pkgname/include "$pkgdir"/usr/include/$pkgname

	# symlink cmake dir to system cmake
	ln -sfv ../$pkgname/lib/cmake/llvm "$pkgdir"/usr/lib/cmake/$pkgname
}

static() {
	pkgdesc="LLVM $_majorver static libraries"
	_common_subpkg

	_mv "$pkgdir"/$_prefix/lib/*.a "$subpkgdir"/$_prefix/lib/
}

libs() {
	pkgdesc="LLVM $_majorver runtime library"
	local soname="libLLVM-$_majorver.so"
	local soname2="libLLVM-$pkgver.so"

	mkdir -p "$subpkgdir"
	cd "$subpkgdir"

	# libLLVM should be in /usr/lib. This is needed for binaries that are
	# dynamically linked with libLLVM, so they can find it on default path.
	_mv "$pkgdir"/$_prefix/lib/$soname usr/lib/
	ln -s $soname usr/lib/$soname2

	# And also symlink it back to the LLVM prefix.
	mkdir -p $_prefix/lib
	ln -s ../../$soname $_prefix/lib/$soname
	ln -s ../../$soname $_prefix/lib/$soname2
}

dev() {
	_common_subpkg
	default_dev
	cd "$subpkgdir"

	amove \
		$_prefix/lib \
		$_prefix/bin/llvm-config

	# Move libLTO and LLVMgold back
	_mv "$subpkgdir"/$_prefix/lib/libLTO.so.* \
		"$subpkgdir"/$_prefix/lib/LLVMgold* \
		"$pkgdir"/$_prefix/lib

	if [ "$_default_llvm" = yes ]; then
		ln -sf llvm$_majorver usr/lib/cmake/llvm
		ln -sf llvm$_majorver/lib/LLVMgold.so "$subpkgdir"/usr/lib/
		ln -sf llvm$_majorver/lib/libLTO.so "$subpkgdir"/usr/lib/
	fi
}

_test_utils() {
	pkgdesc="LLVM $_majorver utilities for executing LLVM and Clang style test suites"
	depends="python3"
	_common_subpkg
	replaces=""

	local litver=$(python3 "$builddir"/utils/lit/setup.py --version 2>/dev/null \
		| sed 's/\.dev.*$//')
	test -n "$litver"
	provides="$provides lit=$litver-r$pkgrel"

	amove usr/lib/$pkgname/bin/FileCheck \
		usr/lib/$pkgname/bin/count \
		usr/lib/$pkgname/bin/not \
		usr/bin/count14 \
		usr/bin/not14

	cd "$builddir"/build

	python3 ../utils/lit/setup.py install --root="$subpkgdir"
	ln -s ../../../bin/lit "$subpkgdir"/$_prefix/bin/lit
	ln -s ../../../bin/lit "$subpkgdir"/$_prefix/bin/llvm-lit
}

_common_subpkg() {
	if [ "$_default_llvm" = yes ]; then
		replaces="llvm${subpkgname#"$pkgname"}"
		provides="$replaces=$pkgver-r$pkgrel"
	fi
}

_mv() {
	local dest; for dest; do true; done  # get last argument
	mkdir -p "$dest"
	mv "$@"
}

sha512sums="
6461bdde27aac17fa44c3e99a85ec47ffb181d0d4e5c3ef1c4286a59583e3b0c51af3c8081a300f45b99524340773a3011380059e3b3a571c3b0a8733e96fc1d  llvm-14.0.6.src.tar.xz
6021b5a39843d645a8c63d558568f120d0d91a1ce209e46f0b980253fafb18dfc2078ef39cf63b0900f4313e3c5636320b3c179ff7a4e220d06aec2455063993  0001-Disable-dynamic-lib-tests-for-musl-s-dlclose-is-noop.patch
ed189ae609c73ab91c0973c3aeb334158370a1a2879f17fed93900f9225f34ca483aa1513d76b9f9f01d94221aa703642398fe7005f5fe878bf43d9ffbeac057  allocscore.patch
dd5efd88abdd13db3b17bde8735c2ddb1ed1ac690a8ab06072e3e91f87d7ede924dcb513ee31b855d304fe43246619e5fa83fcbaeabb256b3b96ff4ebaf3b110  fix-memory-mf_exec-on-aarch64.patch
7a87da5ee5f9d4db21974023eab88645610fdfae856e445f402169bc2aed74ab3861ad03974421aaa2312e24efb55bdbcd312146eb12b52f5c8c7515713bd40f  install-prefix.patch
e288e8d3389536f1f040c0ae8a8eae168de8eedba6040efd5f477701e18529711329a279c6b86d5214ab44efaa6e27818d109be78891ee93e241a0ab1b3a0c5a  lfs64.patch
c96cbd78a71d62e2ad273f0d2ef853644a5a80613e2519c49a9b7c04f684b106fb1dbb969626207bf16edb72c2dbfec23037b74716d5717263a1b86c60df52b4  llvm-stack-size.patch
"