PR rtl-optimization/79405
	* fwprop.c (propagations_left): New variable.
	(forward_propagate_into): Decrement it.
	(fwprop_init): Initialize it.
	(fw_prop): If the variable has reached zero, stop propagating.
	(fwprop_addr): Ditto.

gcc/testsuite/
	PR rtl-optimization/79405
	gcc.dg/pr79405.c: New testcase.

From-SVN: r246627