re PR target/91188 (strict_low_part operations do not work)

re PR target/91188 (strict_low_part operations do not work)

	PR target/91188
	* config/i386/i386.md (*addqi_1_slp): Use register_operand predicate
	for operand 0.  Do not use (match_dup) to match operand 1 with
	operand 0.  Add check in insn constraint that either input operand
	matches operand 0.  Use SWI12 mode iterator to also handle
	HImode operands.
	(*and<mode>_1_slp): Ditto.
	(*<code>qi_1_slp): Ditto.
	(*sub<mode>_1_slp): Use register_operand predicate for operand 0.
	Do not use (match_dup) to match operand 1 with operand 0.  Add
	check in insn constraint that operand 1 matches operand 0.
	Use SWI12 mode iterator to also handle HImode operands.
	(*ashl<mode>3_1_slp): Ditto.
	(*<shift_insn><mode>3_1_slp): Ditto.
	(*<rotate_insn><mode>3_1_slp): Ditto.

testsuite/ChangeLog:

	PR target/91188
	* gcc.target/i386/pr91188-1a.c: New test.
	* gcc.target/i386/pr91188-1b.c: Ditto.
	* gcc.target/i386/pr91188-1c.c: Ditto.
	* gcc.target/i386/pr91188-2a.c: Ditto.
	* gcc.target/i386/pr91188-2b.c: Ditto.
	* gcc.target/i386/pr91188-2c.c: Ditto.

From-SVN: r273578