Break false dependence for vpternlog by inserting vpxor or setting constraint of...

Break false dependence for vpternlog by inserting vpxor or setting constraint of input operand to '0'

False dependency happens when destination is only updated by
pternlog. There is no false dependency when destination is also used
in source. So either a pxor should be inserted, or input operand
should be set with constraint '0'.

gcc/ChangeLog:

	PR target/110438
	PR target/110202
	* config/i386/predicates.md
	(int_float_vector_all_ones_operand): New predicate.
	* config/i386/sse.md (*vmov<mode>_constm1_pternlog_false_dep): New
	define_insn.
	(*<avx512>_cvtmask2<ssemodesuffix><mode>_pternlog_false_dep):
	Ditto.
	(*<avx512>_cvtmask2<ssemodesuffix><mode>_pternlog_false_dep):
	Ditto.
	(*<avx512>_cvtmask2<ssemodesuffix><mode>): Adjust to
	define_insn_and_split to avoid false dependence.
	(*<avx512>_cvtmask2<ssemodesuffix><mode>): Ditto.
	(<mask_codefor>one_cmpl<mode>2<mask_name>): Adjust constraint
	of operands 1 to '0' to avoid false dependence.
	(*andnot<mode>3): Ditto.
	(iornot<mode>3): Ditto.
	(*<nlogic><mode>3): Ditto.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/pr110438.c: New test.
	* gcc.target/i386/pr100711-6.c: Adjust testcase.