Support Intel SM3

Support Intel SM3

gcc/ChangeLog:

	* common/config/i386/cpuinfo.h (get_available_features):
	Detect SM3.
	* common/config/i386/i386-common.cc (OPTION_MASK_ISA2_SM3_SET,
	OPTION_MASK_ISA2_SM3_UNSET): New.
	(OPTION_MASK_ISA2_AVX_UNSET): Add SM3.
	(ix86_handle_option): Handle -msm3.
	* common/config/i386/i386-cpuinfo.h (enum processor_features):
	Add FEATURE_SM3.
	* common/config/i386/i386-isas.h: Add ISA_NAME_TABLE_ENTRY for
	SM3.
	* config.gcc: Add sm3intrin.h
	* config/i386/cpuid.h (bit_SM3): New.
	* config/i386/i386-builtin-types.def:
	Add DEF_FUNCTION_TYPE (V4SI, V4SI, V4SI, V4SI, INT).
	* config/i386/i386-builtin.def (BDESC): Add new builtins.
	* config/i386/i386-c.cc (ix86_target_macros_internal): Define
	__SM3__.
	* config/i386/i386-expand.cc (ix86_expand_args_builtin): Handle
	V4SI_FTYPE_V4SI_V4SI_V4SI_INT.
	* config/i386/i386-isa.def (SM3): Add DEF_PTA(SM3).
	* config/i386/i386-options.cc (isa2_opts): Add -msm3.
	(ix86_valid_target_attribute_inner_p): Handle sm3.
	* config/i386/i386.opt: Add option -msm3.
	* config/i386/immintrin.h: Include sm3intrin.h.
	* config/i386/sse.md (vsm3msg1): New define insn.
	(vsm3msg2): Ditto.
	(vsm3rnds2): Ditto.
	* doc/extend.texi: Document sm3.
	* doc/invoke.texi: Document -msm3.
	* doc/sourcebuild.texi: Document target sm3.
	* config/i386/sm3intrin.h: New file.

gcc/testsuite/ChangeLog:

	* g++.dg/other/i386-2.C: Add -msm3.
	* g++.dg/other/i386-3.C: Ditto.
	* gcc.target/i386/avx-1.c: Add new define for immediate.
	* gcc.target/i386/funcspec-56.inc: Add new target attribute.
	* gcc.target/i386/sse-12.c: Add -msm3.
	* gcc.target/i386/sse-13.c: Ditto.
	* gcc.target/i386/sse-14.c: Ditto.
	* gcc.target/i386/sse-22.c: Add sm3.
	* gcc.target/i386/sse-23.c: Ditto.
	* lib/target-supports.exp (check_effective_target_sm3): New.
	* gcc.target/i386/sm3-1.c: New test.
	* gcc.target/i386/sm3-check.h: Ditto.
	* gcc.target/i386/sm3msg1-2.c: Ditto.
	* gcc.target/i386/sm3msg2-2.c: Ditto.
	* gcc.target/i386/sm3rnds2-2.c: Ditto.