Gotre takes a .go files and rewrites any functions that do tail recursion to prevent allocating unneeded stackframes. The go compiler currently doesn't do this automatically.
// cat fib.go
package fib
func fibRecurse(a, b, n int) int {
if n <= 0 {
return a
}
return fibRecurse(b, a+b, n-1)
}
func Fib(n int) int {
return fibRecurse(0, 1, n)
}
// ./gotre test/fib.go
package fib
func fibRecurse(a, b, n int) int {
__tre__:
if n <= 0 {
return a
}
a, b, n = b, a+b, n-1
goto __tre__
}
func Fib(n int) int {
return fibRecurse(0, 1, n)
}
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