* params.def (PARAM_ALLOW_LOAD_DATA_RACES)
	(PARAM_ALLOW_PACKED_LOAD_DATA_RACES)
	(PARAM_ALLOW_PACKED_STORE_DATA_RACES): Removed.
	(PARAM_ALLOW_STORE_DATA_RACES): Set default to zero.
	* opts.c (default_options_optimization): Set
	PARAM_ALLOW_STORE_DATA_RACES to one at -Ofast.
	* doc/invoke.texi (allow-load-data-races)
	(allow-packed-load-data-races, allow-packed-store-data-races):
	Removed.
	(allow-store-data-races): Document the new default.

testsuite/
	* g++.dg/simulate-thread/bitfields-2.C: Remove allow-load-data-races
	parameter.
	* g++.dg/simulate-thread/bitfields.C: Likewise.
	* gcc.dg/simulate-thread/strict-align-global.c: Remove
	allow-packed-store-data-races parameter.
	* gcc.dg/simulate-thread/subfields.c: Likewise.
	* gcc.dg/tree-ssa/20050314-1.c: Set parameter allow-store-data-races
	to one.

From-SVN: r212034