qbe-backend/test/_spill1.ssa

# test with NReg == 3
# there must be a spill
# happening on %c
#
# if you replace the sub
# by an add or comment
# the two marked lines
# there should be no
# spill
#

function $test() {
@start
	%f =w copy 0      # here
	%b =w copy 1
	%c =w copy 2
	%a =w sub %b, %c
	%d =w copy %b
	%e =w copy %f     # and there
	%g =w copy %a
	ret
}