X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=OPTIMIZATIONS;h=f17f2ee1e930ff8bd1f48a6d72919ead35ecc3c3;hb=428b60fff4247e34ff601810f33976908f22bbc0;hp=50d3417bead8b8b8e1d755af8e66ed6b27ace877;hpb=9afd3958cf7b5ad829c61a4a85956cf783e500f5;p=sbcl.git diff --git a/OPTIMIZATIONS b/OPTIMIZATIONS index 50d3417..f17f2ee 100644 --- a/OPTIMIZATIONS +++ b/OPTIMIZATIONS @@ -187,9 +187,9 @@ stack-allocation of structures is impossible. -------------------------------------------------------------------------------- #21 (defun-with-dx foo () - (let ((dx (list (list 1 2) (list 3 4) + (let ((dx (list (list 1 2) (list 3 4)))) (declare (dynamic-extent dx)) - ...))))) + ...)) External list in DX is allocated on stack, but internal are not. -------------------------------------------------------------------------------- @@ -217,3 +217,18 @@ of (and (or (not number) fixnum) (not character)) This sitation where the type is (OR NULL FIXNUM) comes up in cl-bench, for example in the value returned by POSITION. +-------------------------------------------------------------------------------- +#26 +SBCL cannot derive upper bound for I and uses generic arithmetic here: + +(defun foo (l) + (declare (vector l)) + (dotimes (i (length l)) + (if (block nil + (map-foo (lambda (x) (if x (return t))) + l)) + t + nil))) + +(So the constraint propagator or a possible future SSA-convertor +should know the connection between an NLE and its CLEANUP.)