* passes.c (ipa_write_summaries): Only modify statements if body
	is in memory.
	* cgraphunit.c (ipa_passes): Also produce intermeidate code when
	incrementally linking.
	(ipa_passes): Likewise.
	* lto-cgraph.c (lto_output_node): When incrementally linking do not
	pass down resolution info.
	* common.opt (flag_incremental_link): Update info.
	* gcc.c (plugin specs): Turn flinker-output=* to
	-plugin-opt=-linker-output-known
	* toplev.c (compile_file): Also cut compilation when doing incremental
	link.
	* flag-types. (enum lto_partition_model): Add
	LTO_LINKER_OUTPUT_NOLTOREL.
	(invoke.texi): Add -flinker-output docs.
	* ipa.c (symbol_table::remove_unreachable_nodes): Handle LTO incremental
	link same way as WPA; do not stream in dead initializers.

	* dwarf2out.c (dwarf2out_die_ref_for_decl,
	darf2out_register_external_decl): Support incremental link.

	* lang.opt (lto_linker_output): Add nolto-rel.
	* lto-lang.c (lto_post_options): Handle LTO_LINKER_OUTPUT_REL
	and LTO_LINKER_OUTPUT_NOLTOREL.
	(lto_init): Generate lto when doing incremental link.
	* lto.c (lto_precess_name): Add lto1-inclink.

	* testsuite/g++.dg/lto/20081109-1_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20081118_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20081119-1_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20081120-1_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20081120-2_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20081123_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20081204-1_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20081219_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20090302_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20090313_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20091002-2_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20091002-3_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20091026-1_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20100724-1_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20101010-4_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20101015-2_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/20110311-1_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/pr45621_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/pr48042_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/pr48354-1_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/pr54625-1_0.c: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/pr54625-2_0.c: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/lto/pr68811_0.C: Add -flinker-output=nolto-rel.
	* testsuite/g++.dg/torture/pr43760.C: New test. Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20081120-1_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20081120-2_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20081126_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20081204-1_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20081204-2_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20081212-1_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20081224_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20090116_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20090126-1_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20090126-2_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20090206-1_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20090219_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20091013-1_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20091014-1_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20091015-1_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20091016-1_0.c: Add -flinker-output=nolto-rel.
	* testsuite/gcc.dg/lto/20091020-1_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/20091020-2_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/20091027-1_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/20100426_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/20100430-1_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/20100603-1_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/20100603-2_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/20100603-3_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/20111213-1_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/pr45736_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/pr52634_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/pr54702_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/pr59323-2_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/pr59323_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/pr60820_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/pr81406_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gcc.dg/lto/pr83388_0.c: Add -flinker-output-nolto-rel.
	* testsuite/gfortran.dg/lto/20091016-1_0.f90: Add -flinker-output-nolto-rel.
	* testsuite/gfortran.dg/lto/20091028-1_0.f90: Add -flinker-output-nolto-rel.
	* testsuite/gfortran.dg/lto/20091028-2_0.f90: Add -flinker-output-nolto-rel.
	* testsuite/gfortran.dg/lto/pr46911_0.f: Add -flinker-output-nolto-rel.
	* testsuite/gfortran.dg/lto/pr47839_0.f90: Add -flinker-output-nolto-rel.

From-SVN: r260963