re PR target/58779 (wrong code at -O1 on x86_64-linux-gnu)

re PR target/58779 (wrong code at -O1 on x86_64-linux-gnu)

	PR target/58779
	* config/i386/i386.c (put_condition_code) <case GTU, case LEU>:
	Remove CCCmode handling.
	<case LTU>: Return 'c' suffix for CCCmode.
	<case GEU>: Return 'nc' suffix for CCCmode.
	(ix86_cc_mode) <case GTU, case LEU>: Do not generate overflow checks.
	* config/i386/i386.md (*sub<mode>3_cconly_overflow): Remove.
	(*sub<mode>3_cc_overflow): Ditto.
	(*subsi3_zext_cc_overflow): Ditto.

testsuite/ChangeLog:

	PR target/58779
	* gcc.target/i386/pr30315.c: Remove MINUSCC, DECCC, MINUSCCONLY
	and MINUSCCZEXT defines. Update scan-assembler dg directive.
	* gcc.dg/torture/pr58779.c: New test.

From-SVN: r203935