Backport from mainline

	Backport from mainline
	2012-11-06  Uros Bizjak  <ubizjak@gmail.com>

	* config/i386/i386.c (ix86_init_machine_status): Do not
	explicitly clear tls_descriptor_call_expanded_p again.

	2012-11-06  Uros Bizjak  <ubizjak@gmail.com>

	* config/i386/sse.md
	(<avx_avx2>_maskstore<ssemodesuffix><avxsizesuffix>): Mark operand 0
	as read and written by the instruction.

	2012-11-06  Uros Bizjak  <ubizjak@gmail.com>

	* config/i386/i386.c (TARGET_INSTANTIATE_DECLS): New define.
	(ix86_instantiate_decls): New function.
	(ix86_expand_builtin) <case IX86_BUILTIN_LDMXCSR>: Use SLOT_TEMP
	stack slot instead of SLOT_VIRTUAL.
	<case IX86_BUILTIN_STMXCSR>: Ditto.
	(assign_386_stack_local): Do not assert when virtual slot is valid.
	* config/i386/i386.h (enum ix86_stack_slot): Remove SLOT_VIRTUAL.
	* config/i386/i386.md (truncdfsf2): Do not use SLOT_VIRTUAL stack slot.
	(truncxf<mode>2): Ditto.
	(floatunssi<mode>2): Ditto.
	(isinf<mode>2): Ditto.
	* config/i386/sync.md (atomic_load<mode>): Ditto.
	(atomic_store<mode>): Ditto.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_7-branch@193333 138bc75d-0d04-0410-961f-82ee72b054a4