# Top level -*- makefile -*- fragment for LTO
#   Copyright (C) 2009-2023 Free Software Foundation, Inc.

#This file is part of GCC.

#GCC is free software; you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation; either version 3, or (at your option)
#any later version.

#GCC is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3.  If not see
# <http://www.gnu.org/licenses/>.

# Variables

# The name of the LTO compiler.
LTO_EXE = lto1$(exeext)
LTO_DUMP_EXE = lto-dump$(exeext)
LTO_DUMP_INSTALL_NAME := $(shell echo lto-dump|sed '$(program_transform_name)')
# The LTO-specific object files inclued in $(LTO_EXE).
LTO_OBJS = lto/lto-lang.o lto/lto.o lto/lto-object.o attribs.o lto/lto-partition.o lto/lto-symtab.o lto/lto-common.o
lto_OBJS = $(LTO_OBJS)
LTO_DUMP_OBJS = lto/lto-lang.o lto/lto-object.o attribs.o lto/lto-partition.o lto/lto-symtab.o lto/lto-dump.o lto/lto-common.o
lto_dump_OBJS = $(LTO_DUMP_OBJS)

# this is only useful in a LTO bootstrap, but this does not work right
# now. Should reenable after this is fixed, but only when LTO bootstrap
# is enabled.

#ifeq ($(if $(wildcard ../stage_current),$(shell cat \
#  ../stage_current)),stageautofeedback)
#$(LTO_OBJS): CFLAGS += -fauto-profile=lto1.fda
#$(LTO_OBJS): lto1.fda
#endif

# Rules

lto: $(LTO_EXE) $(LTO_DUMP_EXE)
lto1.serial = $(LTO_EXE)
lto2.serial = $(LTO_DUMP_EXE)

.PHONY: lto

# These hooks are used by the main GCC Makefile.  Consult that
# Makefile for documentation.
lto.all.cross:
lto.start.encap:
lto.rest.encap:
lto.tags:
lto.install-common: installdirs
	$(INSTALL_PROGRAM) $(LTO_DUMP_EXE) \
	$(DESTDIR)$(bindir)/$(LTO_DUMP_INSTALL_NAME)$(exeext)

lto.install-man:
lto.install-info:
lto.dvi:
lto.install-dvi:
lto.pdf:
lto.install-pdf:
lto.html:
lto.install-html:
lto.uninstall:
lto.info:
lto.man:
lto.srcextra:
lto.srcman:
lto.srcinfo:
lto.install-plugin:

lto.mostlyclean:
	rm -f $(LTO_OBJS) $(LTO_EXE) lto1*.fda $(LTO_DUMP_OBJS) $(LTO_DUMP_EXE) lto-dump.fda

lto.clean:
lto.distclean:
lto.maintainer-clean:
lto.stage1:
lto.stage2:
lto.stage3:
lto.stage4:
lto.stageprofile:
lto.stagefeedback:

# LTO rules.

# Use strict warnings for this front end.
lto-warn = $(STRICT_WARN)

$(LTO_EXE): $(LTO_OBJS) $(BACKEND) $(LIBDEPS) $(lto1.prev)
	@$(call LINK_PROGRESS,$(INDEX.lto1),start)
	+$(LLINKER) $(ALL_LINKERFLAGS) $(LDFLAGS) -o $@ \
		$(LTO_OBJS) $(BACKEND) $(BACKENDLIBS) $(LIBS)
	@$(call LINK_PROGRESS,$(INDEX.lto1),end)

$(LTO_DUMP_EXE): $(LTO_DUMP_OBJS) $(BACKEND) $(LIBDEPS) $(lto2.prev)
	@$(call LINK_PROGRESS,$(INDEX.lto2),start)
	+$(LLINKER) $(ALL_LINKERFLAGS) $(LDFLAGS) -o $@ \
		$(LTO_DUMP_OBJS) $(BACKEND) $(BACKENDLIBS) $(LIBS)
	@$(call LINK_PROGRESS,$(INDEX.lto2),end)

lto/lto-dump.o: $(LTO_OBJS)

components_in_prev = "bfd opcodes binutils fixincludes gas gcc gmp mpfr mpc isl gold intl ld libbacktrace libcpp libcody libdecnumber libiberty libiberty-linker-plugin libiconv zlib lto-plugin libctf libsframe"
components_in_prev_target = "libstdc++-v3 libsanitizer libvtv libgcc libbacktrace libphobos zlib libgomp libatomic"

.PHONY: create_fdas_for_lto1

lto1.fda: create_fdas_for_lto1
	$(PROFILE_MERGER) $(shell ls -ha lto1_*.fda) --output_file lto1.fda -gcov_version 2

create_fdas_for_lto1: ../stage1-gcc/lto1$(exeext) ../prev-gcc/$(PERF_DATA)
	for component_in_prev in "$(components_in_prev)"; do \
	  perf_path=../prev-$$component_in_prev/$(PERF_DATA); \
	  echo "Perf path:"; \
	  echo $$perf_path; \
	  if [ -f $$perf_path ]; then \
	    profile_name=lto1_$$component_in_prev.fda; \
	    $(CREATE_GCOV) -binary ../stage1-gcc/lto1$(exeext) -gcov $$profile_name -profile $$perf_path -gcov_version 2; \
	  fi; \
	done;

	for component_in_prev_target in "$(components_in_prev_target)"; do \
	  perf_path=../prev-$(TARGET_SUBDIR)/$$component_in_prev_target/$(PERF_DATA); \
	  echo "Perf path:"; \
	  echo $$perf_path; \
	  if [ -f $$perf_path ]; then \
	    profile_name=lto1_$$component_in_prev_target.fda; \
	    $(CREATE_GCOV) -binary ../stage1-gcc/lto1$(exeext) -gcov $$profile_name -profile $$perf_path -gcov_version 2; \
	  fi; \
	done;

# LTO testing is done as part of C/C++/Fortran etc. testing.
check-lto:

# No LTO-specific selftests
selftest-lto: