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export function w $main() {
@start
%a =l alloc4 4
%b =l alloc4 4
storew 4, %a
storew 5, %b
@loop
# %mem will be %a and %b successively,
# but we do not know it when processing
# the phi because %b goes through a cpy
%mem =l phi @start %a, @loop %bcpy
%w =w load %mem
%eq5 =w ceqw %w, 5
%bcpy =l copy %b
jnz %eq5, @exit, @loop
@exit
ret 0
}
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