In http://www.freepascal.org/docs-html/prog/progsu72.html#x78-770001.1.72 is
written:
...
the compiler will omit the generation of a stackframe if the following
conditions are satisfied:
The procedure has no parameters.
...
This condition should read: The procedure has no parameters on the stack.
Parameters passed in registers do not trigger stackframe generation.
There are a lot of wrapper functions, with register only parameters, in the
rtl and elsewhere that don't generate stack frames.
Ludo
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