PR rtl-optimization/79910
	* combine.c (record_used_regs): New static function.
	(try_combine): Handle situations where there is an additional
	instruction between I2 and I3 which needs to have a LOG_LINK
	updated.

	PR rtl-optimization/79910
	* gcc.dg/torture/pr79910.c: New test.

From-SVN: r246226