On 23 Jul 2012, at 10:58, OBones wrote: > leledumbo wrote: >> I look at the generated code and in the direct one there's additional >> overhead of decrementing the reference counter on each iteration. > I see it too now (I forgot about the -a option). > I can understand why there is a call to the decrementer outside the loop when > using the variable, but I don't understand why it pushes it completely out of > the loop. I mean, isn't there a reference count problem here?
Reference counted data types are returned by reference in a location passed to the function by the caller. The compiler here passes the address of S to the function, so that when assigning something to the function result inside the function, S' reference count gets decreased. The fact that when the result is returned in a temp, this temp also gets finalized on the caller side before the call is just a code generator inefficiency. I've changed that in trunk. Jonas_______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
