gcc/ChangeLog:

2017-07-06  Carl Love  <cel@us.ibm.com>

	* config/rs6000/rs6000-c.c: Add support for built-in functions
	vector signed int vec_subc (vector signed int, vector signed int);
	vector signed __int128 vec_subc (vector signed __int128,
					 vector signed __int128);
	vector unsigned __int128 vec_subc (vector unsigned __int128,
					   vector unsigned __int128);
	vector signed int vec_sube (vector signed int, vector signed int,
				    vector signed int);
	vector unsigned int vec_sube (vector unsigned int,
				      vector unsigned int,
				      vector unsigned int);
	vector signed __int128 vec_sube (vector signed __int128,
					 vector signed __int128,
					 vector signed__int128);
	vector unsigned __int128 vec_sube (vector unsigned __int128,
					   vector unsigned __int128,
					   vector unsigned __int128);
	vector signed int vec_subec (vector signed int, vector signed int,
				     vector signed int);
	vector unsigned int vec_subec (vector unsigned int,
				       vector unsigned int,
				       vector unsigned int);
	vector signed __int128 vec_subec (vector signed __int128,
					  vector signed __int128,
					  vector signed__int128);
	vector unsigned __int128 vec_subec (vector unsigned __int128,
					    vector unsigned __int128,
					    vector unsigned __int128);
	* config/rs6000/rs6000.c (ALTIVEC_BUILTIN_VEC_SUBE,
	ALTIVEC_BUILTIN_VEC_SUBEC): Add ef_builtins.
	* config/rs6000/rs6000-builtin.def (SUBE, SUBEC): Add
	BU_ALTIVEC_OVERLOAD_X definitions.
	* config/rs6000/altivec.h (vec_sube, vec_subec): Add builtin defines.
	* doc/extend.texi: Update the built-in documentation file for the new
	built-in functions.

gcc/testsuite/ChangeLog:

2017-07-06  Carl Love  <cel@us.ibm.com>

	* gcc.target/powerpc/p8vector-builtin-8.c (foo): Add test cases for
	the new vec_subc, vec_sube, vec_subec built-ins.  Add the missing test
	cases for vec_addc, adde and addec builtins.

From-SVN: r250023