re PR target/67317 ([x86] Silly code generation for _addcarry_u32/_addcarry_u64)

re PR target/67317 ([x86] Silly code generation for _addcarry_u32/_addcarry_u64)

	PR target/67317
	* config/i386/i386.md (*add<mode>3_cc): Remove insn pattern.
	(addqi3_cc): Ditto.
	(UNSPEC_ADD_CARRY): Remove.
	(addqi3_cconly_overflow): New expander.
	(*add<dwi>3_doubleword): Split to add<mode>3_cconly_overflow.
	Adjust for changed add<mode>3_carry.
	(*neg<dwi>2_doubleword): Adjust for changed add<mode>3_carry.
	(*sub<dwi>3_doubleword): Adjust for changed sub<mode>3_carry.
	(<plusminus_insn><mode>3_carry): Remove expander.
	(*<plusminus_insn><mode>3_carry): Split insn pattern to
	add<mode>3_carry and sub<mode>3_carry.
	(plusminus_carry_mnemonic): Remove code attribute.
	(add<mode>3_carry): Canonicalize insn pattern.
	(*addsi3_carry_zext): Ditto.
	(sub<mode>3_carry): Ditto.
	(*subsi3_carry_zext): Ditto.
	(adcx<mode>3): Remove insn pattern.
	(addcarry<mode>): New insn pattern.
	(subborrow<mode>): Ditto.
	* config/i386/i386.c (ix86_expand_strlensi_unroll_1): Use
	gen_addqi3_cconly_overflow instead of gen_addqi3_cc.
	(ix86_expand_builtin) <case IX86_BUILTIN_SBB32,
	case IX86_BUILTIN_SBB64, case IX86_BUILTIN_ADDCARRY32,
	case IX86_BUILTIN_ADDCARRY64>: Use CODE_FOR_subborrowsi,
	CODE_FOR_subborrowdi, CODE_FOR_addcarrysi and CODE_FOR_addcarrydi.
	Rewrite expander to not clobber carry flag chains.

testsuite/ChangeLog:

	PR target/67317
	* gcc.target/i386/pr67317-1.c: New test.
	* gcc.target/i386/pr67317-2.c: Ditto.
	* gcc.target/i386/pr67317-3.c: Ditto.
	* gcc.target/i386/pr67317-4.c: Ditto.
	* gcc.target/i386/adx-addcarryx32-1.c: Also scan for adcl.
	* gcc.target/i386/adx-addcarryx32-2.c: Also scan for adcq.

From-SVN: r227271