re PR target/78904 (zero-extracts are not effective)

	PR target/78904
	* config/i386/i386.md (*cmpqi_ext_1, *extvqi, *extzvqi): Use
	nonimmediate_operand instead of nonimmediate_x64nomem_operand.
	(*cmpqi_ext_3, insv<mode>_1, addqi_ext_1, *testqi_ext_1, andqi_ext_1)
	(*<any_or:code>qi_ext_1, *xorqi_ext_1_cc): Use general_operand
	instead of general_x64nomem_operand.
	* config/i386/predicates.md (nonimmediate_x64nomem_operand): Remove.
	(general_x64nomem_operand): Ditto.

testsuite/ChangeLog:

	PR target/78904
	* gcc.target/i386/pr78904-2.c: New test.

From-SVN: r243933