PREFIX ?= $(HOME)/opt/hercules-compiler
TMP_DESTDIR = $(CURDIR)/install

# With gcc > 5, we get strange CUDA-related errors in clang.
export CC = gcc-5
export CXX = g++-5

USE_GPUGUARD = # OFF if empty

all: libpremnotify
all: passes

llvm-clang: build/bin/opt

build/bin/opt: build/build.ninja
	ninja -C build

llvm/tools/clang:
	ln -s ../../clang $@

llvm/tools/lld:
	ln -s ../../lld $@

llvm/projects/openmp:
	ln -s ../../openmp $@

build build_passes build_native:
	mkdir $@

ifneq ($(DEB_HOST_GNU_TYPE),$(DEB_BUILD_GNU_TYPE))

LLVM_TBLGEN=$(CURDIR)/build_native/bin/llvm-tblgen
CLANG_TBLGEN=$(CURDIR)/build_native/bin/clang-tblgen

LLVM_CROSS_FLAGS += -DCMAKE_C_COMPILER=$(DEB_HOST_GNU_TYPE)-gcc-5
LLVM_CROSS_FLAGS += -DCMAKE_CXX_COMPILER=$(DEB_HOST_GNU_TYPE)-g++-5
LLVM_CROSS_FLAGS += -DCMAKE_SYSTEM_PROCESSOR=$(DEB_HOST_GNU_CPU)

LLVM_CROSS_FLAGS += -DCMAKE_CROSSCOMPILING=True
## We don't need host tablegens, because we use qemu & binfmt to run
## arm64 binaries on x86
# LLVM_CROSS_FLAGS += -DLLVM_TABLEGEN="<path-to-host-bin>/llvm-tblgen"
# LLVM_CROSS_FLAGS += -DCLANG_TABLEGEN="<path-to-host-bin>/clang-tblgen"
LLVM_CROSS_FLAGS += -DLLVM_TABLEGEN="$(LLVM_TBLGEN)"
LLVM_CROSS_FLAGS += -DCLANG_TABLEGEN="$(CLANG_TBLGEN)"
LLVM_CROSS_FLAGS += -DLLVM_DEFAULT_TARGET_TRIPLE=$(DEB_HOST_GNU_TYPE)
LLVM_CROSS_FLAGS += -DLLVM_TARGET_ARCH=$(DEB_TARGET_GNU_CPU)
#LLVM_CROSS_FLAGS += -DLLVM_TARGETS_TO_BUILD=$(shell echo $(DEB_HOST_ARCH)|tr '[:lower:]' '[:upper:]')

build/build.ninja: | $(LLVM_TBLGEN) $(CLANG_TBLGEN)

$(LLVM_TBLGEN) $(CLANG_TBLGEN): | build_native/build.ninja
	ninja -C build_native bin/llvm-tblgen bin/clang-tblgen

build_native/build.ninja: | build_native
	cd $(@D) && cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX="$(PREFIX)" \
		-DLLVM_ENABLE_ASSERTIONS=ON -DLLVM_ENABLE_BACKTRACES=ON -DLLVM_ENABLE_WERROR=OFF \
		-DBUILD_SHARED_LIBS=OFF -DLLVM_ENABLE_RTTI=ON \
		-DCMAKE_CXX_FLAGS='-DHERCULES_PASS_ROOT=\"$(PREFIX)/lib/hercules/src/passes/\"' \
		-G "Ninja" $(CURDIR)/llvm

libpremnotify: export CC=$(DEB_HOST_GNU_TYPE)-gcc-5
endif


build/build.ninja: | build llvm/tools/clang llvm/tools/lld llvm/projects/openmp
	cd $(@D) && cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX="$(PREFIX)" \
		-DLLVM_ENABLE_ASSERTIONS=ON -DLLVM_ENABLE_BACKTRACES=ON -DLLVM_ENABLE_WERROR=OFF \
		-DBUILD_SHARED_LIBS=OFF -DLLVM_ENABLE_RTTI=ON $(LLVM_CROSS_FLAGS) \
		-DLLVM_ENABLE_LLD=ON -DLLVM_TOOL_LLD_BUILD=ON \
		-DCMAKE_CXX_FLAGS='-DHERCULES_PASS_ROOT=\"$(PREFIX)/lib/hercules/src/passes/\" -DOPENMP_NVPTX_COMPUTE_CAPABILITY=62 $(if $(USE_GPUGUARD),-DUSE_GPUGUARD)' \
		-DLIBOMPTARGET_NVPTX_COMPUTE_CAPABILITY="62" \
		-G"Ninja" $(CURDIR)/llvm

$(TMP_DESTDIR)/$(PREFIX)/lib/cmake/llvm: | llvm-clang
	DESTDIR=$(TMP_DESTDIR) ninja -C build install

build_passes/build.ninja: | build_passes $(TMP_DESTDIR)/$(PREFIX)/lib/cmake/llvm
	cd $(@D) && cmake -DCMAKE_INSTALL_PREFIX="$(PREFIX)" \
		-DLLVM_DIR':'STRING=$(TMP_DESTDIR)$(PREFIX)/lib/cmake/llvm \
		-DCMAKE_BUILD_TYPE=DEBUG \
		$(LLVM_CROSS_FLAGS) -DLLVM_TARGETS_TO_BUILD="X86;ARM" \
		-DCPU_CACHE_SIZE_DEFAULT=524288 \
		-DGPU_CACHE_SIZE_DEFAULT=524288 \
		-DGPU_SCRATCHPAD_SIZE_DEFAULT=48000 \
		-DUSE_HW_CACHES=ON \
		-DHIERARCHICAL_INTERVALS=ON \
		-DPREFETCH_REPS=1 \
		-DUSE_HW_CACHES_PREFETCH=ON \
		-DUSE_HW_CACHES_INLINEPTX_PREFETCH=OFF \
		-DUSE_HW_CACHES_LIBCALL=OFF \
		-DUSE_HW_CACHES_VOLALOAD=OFF \
		-DUSE_HW_CACHES_SINGLEWRITEBACK=OFF \
		-DUSE_HW_CACHES_INDWRITEBACK_LIBCALL=ON \
		-DUSE_HW_CACHES_INDWRITEBACK_INLINE=OFF \
		-DULES_EXTERNAL_LINKAGE=OFF \
		-DALWAYS_INLINE_UNSPECIALIZED=OFF \
		-DALWAYS_INLINE_LOAD=OFF \
		-DALWAYS_INLINE_EXECUTE=OFF \
		-DALWAYS_INLINE_STORE=OFF \
		-DAGGRESSIVELY_INLINE_CALL_TREE=OFF \
		-G "Ninja" $(CURDIR)/HerculesCompiler/llvm-passes

passes: build_passes/build.ninja
	ninja -C build_passes

libpremnotify:
	$(MAKE) -C HerculesCompiler/libpremnotify NVCC_FLAGS=$(if $(USE_GPUGUARD),-DUSE_GPUGUARD)

install: all
	DESTDIR=$(DESTDIR) ninja -C build install
	DESTDIR=$(DESTDIR) ninja -C build_passes install
	$(MAKE) -C HerculesCompiler/libpremnotify install DESTDIR=$(DESTDIR) PREFIX=$(PREFIX)

clean:
	rm -rf build build_passes build_native install

create-orig-tgz: prefix=$(notdir $(CURDIR))
create-orig-tgz: upstream_version=$(shell dpkg-parsechangelog --show-field Version|sed -e s/-.*//)
create-orig-tgz:
	git archive --prefix=$(prefix)/ -o ../$(prefix)_$(upstream_version).orig.tar.gz HEAD
	git submodule foreach 'set -x; git archive --prefix=$$path/ -o $$toplevel/../$(prefix)_$(upstream_version).orig-$$path.tar.gz $$sha1'

cross-tx2:
	sbuild --host=arm64 -d xenial --add-depends="libc6-dev, libstdc++-5-dev" --build-failed-commands='%s'