Emit vzerouppers after reload.

Emit vzerouppers after reload.

gcc/

2010-11-02  Uros Bizjak  <ubizjak@gmail.com>
	    H.J. Lu  <hongjiu.lu@intel.com>

	* config/i386/i386-protos.h (ix86_split_call_vzeroupper): New.
	(ix86_split_call_pop_vzeroupper): Likewise.

	* config/i386/i386.c (move_or_delete_vzeroupper_2): Rewrite
	the loop.
	(ix86_expand_call): Use UNSPEC_CALL_NEEDS_VZEROUPPER.
	(ix86_split_call_vzeroupper): New.
	(ix86_split_call_pop_vzeroupper): Likewise.

	* config/i386/i386.md (UNSPEC_CALL_NEEDS_VZEROUPPER): New.
	(*call_pop_0_vzeroupper): Likewise.
	(*call_pop_1_vzeroupper): Likewise.
	(*sibcall_pop_1_vzeroupper): Likewise.
	(*call_0_vzeroupper): Likewise.
	(*call_1_vzeroupper): Likewise.
	(*sibcall_1_vzeroupper): Likewise.
	(*call_1_rex64_vzeroupper): Likewise.
	(*call_1_rex64_ms_sysv_vzeroupper): New.
	(*call_1_rex64_large_vzeroupper): Likewise.
	(*sibcall_1_rex64_vzeroupper): Likewise.
	(*call_value_pop_0_vzeroupper): New.
	(*call_value_pop_1_vzeroupper): Likewise.
	(*sibcall_value_pop_1_vzeroupper): Likewise.
	(*call_value_0_vzeroupper): New.
	(*call_value_0_rex64_vzeroupper): Use
	(*call_value_0_rex64_ms_sysv_vzeroupper): Likewise.
	(*call_value_1_vzeroupper): Likewise.
	(*sibcall_value_1_vzeroupper): Likewise.
	(*call_value_1_rex64_vzeroupper): Likewise.
	(*call_value_1_rex64_ms_sysv_vzeroupper): Likewise.
	(*call_value_1_rex64_large_vzeroupper): Likewise.
	(*sibcall_value_1_rex64_vzeroupper): Likewise.

gcc/testsuite/

2010-11-02  H.J. Lu  <hongjiu.lu@intel.com>

	* gcc.target/i386/avx-vzeroupper-15.c: New.
	* gcc.target/i386/avx-vzeroupper-16.c: Likewise.
	* gcc.target/i386/avx-vzeroupper-17.c: Likewise.
	* gcc.target/i386/avx-vzeroupper-18.c: Likewise.

	PR target/46253
	* gcc.target/i386/pr46253.c: New.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@166208 138bc75d-0d04-0410-961f-82ee72b054a4