i386: Share AES xmm intrin with VAES

i386: Share AES xmm intrin with VAES

Currently in GCC, the 128 bit intrin for instruction vaes{end,dec}{last,}
is under AES ISA. Because there is no dependency between ISA set AES
and VAES, The 128 bit intrin is not available when we use compiler flag
-mvaes -mavx512vl and there is no other way to use that intrin. But it
should according to Intel SDM.

Although VAES aims to be a VEX/EVEX promotion for AES, but it is only part
of it. Therefore, we share the AES xmm intrin with VAES.

Also, since -mvaes indicates that we could use VEX encoding for ymm, we
should imply AVX for VAES.

gcc/ChangeLog:

	* common/config/i386/i386-common.cc
	(OPTION_MASK_ISA2_AVX_UNSET): Add OPTION_MASK_ISA2_VAES_UNSET.
	(ix86_handle_option): Set AVX flag for VAES.
	* config/i386/i386-builtins.cc (ix86_init_mmx_sse_builtins):
	Add OPTION_MASK_ISA2_VAES_UNSET.
	(def_builtin): Share builtin between AES and VAES.
	* config/i386/i386-expand.cc (ix86_check_builtin_isa_match):
	Ditto.
	* config/i386/i386.md (aes): New isa attribute.
	* config/i386/sse.md (aesenc): Add pattern for VAES with xmm.
	(aesenclast): Ditto.
	(aesdec): Ditto.
	(aesdeclast): Ditto.
	* config/i386/vaesintrin.h: Remove redundant avx target push.
	* config/i386/wmmintrin.h (_mm_aesdec_si128): Change to macro.
	(_mm_aesdeclast_si128): Ditto.
	(_mm_aesenc_si128): Ditto.
	(_mm_aesenclast_si128): Ditto.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/avx512fvl-vaes-1.c: Add VAES xmm test.
	* gcc.target/i386/pr109117-1.c: Modify error message.