gcc/

2010-10-27  H.J. Lu  <hongjiu.lu@intel.com>

	* config/i386/i386-protos.h (init_cumulative_args): Add an int.

	* config/i386/i386.c (block_info): New.
	(BLOCK_INFO): Likewise.
	(call_avx256_state): Likewise.
	(check_avx256_stores): Likewise.
	(move_or_delete_vzeroupper_2): Likewise.
	(move_or_delete_vzeroupper_1): Likewise.
	(move_or_delete_vzeroupper): Likewise.
	(use_avx256_p): Likewise.
	(function_pass_avx256_p): Likewise.
	(flag_opts): Add -mvzeroupper.
	(ix86_option_override_internal): Turn on MASK_VZEROUPPER by
	default for TARGET_AVX.  Turn off MASK_VZEROUPPER if TARGET_AVX
	is disabled.
	(ix86_function_ok_for_sibcall): Disable sibcall if we need to
	generate vzeroupper.
	(init_cumulative_args): Add an int to indicate caller.  Set
	use_avx256_p, callee_return_avx256_p and caller_use_avx256_p
	based on return type.
	(ix86_function_arg): Set use_avx256_p, callee_pass_avx256_p and
	caller_pass_avx256_p based on argument type.
	(ix86_expand_epilogue): Emit vzeroupper if 256bit AVX register
	is used, but not returned by caller.
	(ix86_expand_call): Emit vzeroupper if 256bit AVX register is
	used.
	(ix86_local_alignment): Set use_avx256_p if 256bit AVX register
	is used.
	(ix86_minimum_alignment): Likewise.
	(ix86_expand_special_args_builtin): Set target to
	GEN_INT (vzeroupper_intrinsic) for CODE_FOR_avx_vzeroupper.
	(ix86_reorg): Run the vzeroupper optimization if needed.

	* config/i386/i386.h (ix86_args): Add caller.
	(INIT_CUMULATIVE_ARGS): Updated.
	(machine_function): Add use_vzeroupper_p, use_avx256_p,
	caller_pass_avx256_p, caller_return_avx256_p,
	callee_pass_avx256_p and callee_return_avx256_p.

	* config/i386/i386.opt (-mvzeroupper): New.

	* config/i386/predicates.md (vzeroupper_operation): Removed.

	* config/i386/sse.md (avx_vzeroupper): Removed.
	(*avx_vzeroupper): Removed.
	(avx_vzeroupper): New.

	* doc/invoke.texi: Document -mvzeroupper.

gcc/testsuite/

2010-10-27  H.J. Lu  <hongjiu.lu@intel.com>

	* gcc.target/i386/avx-vzeroupper-1.c: Add -mtune=generic.
	* gcc.target/i386/avx-vzeroupper-2.c: Likewise.

	* gcc.target/i386/avx-vzeroupper-3.c: New.
	* gcc.target/i386/avx-vzeroupper-4.c: Likewise.
	* gcc.target/i386/avx-vzeroupper-5.c: Likewise.
	* gcc.target/i386/avx-vzeroupper-6.c: Likewise.
	* gcc.target/i386/avx-vzeroupper-7.c: Likewise.
	* gcc.target/i386/avx-vzeroupper-8.c: Likewise.
	* gcc.target/i386/avx-vzeroupper-9.c: Likewise.
	* gcc.target/i386/avx-vzeroupper-10.c: Likewise.
	* gcc.target/i386/avx-vzeroupper-11.c: Likewise.
	* gcc.target/i386/avx-vzeroupper-12.c: Likewise.
	* gcc.target/i386/avx-vzeroupper-13.c: Likewise.
	* gcc.target/i386/avx-vzeroupper-14.c: Likewise.

From-SVN: r166000