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Allowing variables to hold an unbound value and requiring a check on each load is suboptimal; the fixing letrec boolean check is better. So other runtimes (hoot) might preclude unbound variables by construction. Allow them to do so. * module/language/cps/guile-vm.scm (target-has-unbound-boxes?): New definition. * module/language/tree-il/compile-cps.scm (target-has-unbound-boxes?): (%box-ref): Only residualize an unbound check if the target has unbound boxes. |
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texinfo.scm |