backport: re PR sanitizer/85018 (Many sanitizer tests ICE since r258681)

backport: re PR sanitizer/85018 (Many sanitizer tests ICE since r258681)

	Backported from mainline
	2018-03-22  Jakub Jelinek  <jakub@redhat.com>

	PR sanitizer/85018
	* dwarf2asm.c (dw2_output_indirect_constant_1): Set
	DECL_INITIAL (decl) to decl at the end.
	* varasm.c (use_blocks_for_decl_p): Revert the 2018-03-20 change,
	adjust the comment.

	2018-03-20  Jakub Jelinek  <jakub@redhat.com>

	PR target/84990
	* dwarf2asm.c (dw2_output_indirect_constant_1): Temporarily turn off
	flag_section_anchors.
	* varasm.c (use_blocks_for_decl_p): Remove hack for
	dw2_force_const_mem.

	2018-03-19  Jakub Jelinek  <jakub@redhat.com>

	PR sanitizer/78651
	* dwarf2asm.c: Include fold-const.c.
	(dw2_output_indirect_constant_1): Set DECL_INITIAL (decl) to ADDR_EXPR
	of decl rather than decl itself.

	2018-03-19  Maxim Ostapenko  <m.ostapenko@samsung.com>

	PR sanitizer/78651
	* dwarf2asm.c (dw2_output_indirect_constant_1): Disable ASan before
	calling assemble_variable.

	* g++.dg/asan/pr78651.C: New test.

From-SVN: r261930