rs6000: Enable new built-in support, with test suite and altivec.h changes

rs6000: Enable new built-in support, with test suite and altivec.h changes

This patch enables the new built-in infastructure for the Power back end.
To avoid any patches causing regressions that would affect bisection, this is a
combined patch that also includes all the test suite changes and the necessary
modifications to altivec.h.  The patches included here are the following:

https://gcc.gnu.org/pipermail/gcc-patches/2021-November/584638.html
https://gcc.gnu.org/pipermail/gcc-patches/2021-September/578613.html
https://gcc.gnu.org/pipermail/gcc-patches/2021-November/584829.html
https://gcc.gnu.org/pipermail/gcc-patches/2021-September/578614.html

The third of these four was broken up into multiple patches for review, but
effectively all pieces of it were accepted after an independent patch that
modified the error handling for overloaded builtins.

2021-12-02  Bill Schmidt  <wschmidt@linux.ibm.com>

gcc/
	* config/rs6000/altivec.h: Delete a number of #defines that are	now
	superfluous.  Alphabetize.  Include rs6000-vecdefines.h.  Include some
	synonyms.
	* config/rs6000/rs6000-builtin-new.def (CMPB): Flag as no32bit.
	(BPERMD): Flag as 32bit (needing special handling for 32-bit).
	(UNPACK_TD): Return unsigned long long instead of unsigned long.
	(GET_TEXASR): Return unsigned long instead of unsigned long long.
	(GET_TEXASRU): Likewise.
	(GET_TFHAR): Likewise.
	(GET_TFIAR): Likewise.
	(SET_TEXASR): Pass unsigned long instead of unsigned long long.
	(SET_TEXASRU): Likewise.
	(SET_TFHAR): Likewise.
	(SET_TFIAR): Likewise.
	(TABORTDC): Likewise.
	(TABORTDCI): Likewise.
	* config/rs6000/rs6000-call.c (rs6000_expand_new_builtin): Fix error
	handling for no32bit.  Add 32bit handling for RS6000_BIF_BPERMD.
	* config/rs6000/rs6000-gen-builtins.c (write_init_file): Initialize
	new_builtins_are_live to 1.

gcc/testsuite/
	* gcc.target/powerpc/bfp/scalar-extract-exp-2.c: Adjust expected error
	message.
	* gcc.target/powerpc/bfp/scalar-extract-sig-2.c: Likewise.
	* gcc.target/powerpc/bfp/scalar-insert-exp-2.c: Likewise.
	* gcc.target/powerpc/bfp/scalar-insert-exp-5.c: Likewise.
	* gcc.target/powerpc/bfp/scalar-insert-exp-8.c: Likewise.
	* gcc.target/powerpc/bfp/scalar-test-neg-2.c: Likewise.
	* gcc.target/powerpc/bfp/scalar-test-neg-3.c: Likewise.
	* gcc.target/powerpc/bfp/scalar-test-neg-5.c: Likewise.
	* gcc.target/powerpc/byte-in-set-2.c: Likewise.
	* gcc.target/powerpc/cmpb-2.c: Likewise.
	* gcc.target/powerpc/cmpb-3.c: Likewise.
	* gcc.target/powerpc/cmpb32-2.c: Likewise.
	* gcc.target/powerpc/crypto-builtin-2.c: Likewise.
	* gcc.target/powerpc/fold-vec-splat-floatdouble.c: Remove invalid
	test and adjust xxpermdi count.
	* gcc.target/powerpc/fold-vec-splat-longlong.c: Remove invalid
	tests and adjust instruction counts.
	* gcc.target/powerpc/fold-vec-splat-misc-invalid.c: Adjust expected
	error messages.
	* gcc.target/powerpc/int_128bit-runnable.c: Adjust instruction counts.
	* gcc.target/powerpc/pr80315-1.c: Adjust expected error message.
	* gcc.target/powerpc/pr80315-2.c: Likewise.
	* gcc.target/powerpc/pr80315-3.c: Likewise.
	* gcc.target/powerpc/pr80315-4.c: Likewise.
	* gcc.target/powerpc/pr88100.c: Likewise.
	* gcc.target/powerpc/pragma_misc9.c: Likewise.
	* gcc.target/powerpc/pragma_power8.c: Undef _RS6000_VECDEFINES_H.
	* gcc.target/powerpc/pragma_power9.c: Likewise.
	* gcc.target/powerpc/test_fpscr_drn_builtin_error.c: Adjust expected
	error messages.
	* gcc.target/powerpc/test_fpscr_rn_builtin_error.c: Likewise.
	* gcc.target/powerpc/vec-gnb-2.c: Likewise.
	* gcc.target/powerpc/vsu/vec-all-nez-7.c: Likewise.
	* gcc.target/powerpc/vsu/vec-any-eqz-7.c: Likewise.
	* gcc.target/powerpc/vsu/vec-cmpnez-7.c: Likewise.
	* gcc.target/powerpc/vsu/vec-cntlz-lsbb-2.c: Likewise.
	* gcc.target/powerpc/vsu/vec-cnttz-lsbb-2.c: Likewise.
	* gcc.target/powerpc/vsu/vec-xl-len-13.c: Likewise.
	* gcc.target/powerpc/vsu/vec-xst-len-12.c: Likewise.