libqbe/lisc/test/loop.ssa

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# simple looping program
# sums all integers from 100 to 0
@start
@loop
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%s = phi @start 100, @loop %s1
%n = phi @start 0, @loop %n1
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%n1 = sub %n, 1
%s1 = add %s, %n
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jez %n1, @end, @loop
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@end
ret