On Sat, 27 Aug 2011, Florian Klämpfl wrote:
Am 27.08.2011 12:50, schrieb Michael Van Canneyt:
On Sat, 27 Aug 2011, Ludo Brands wrote:
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.
If the compiler developers can confirm this, then I'll adapt the
documentation.
Find some generic text aiming on complexity or whatever :) The rules
when it happens or not are pretty complex, they also depend on the
target architecture. See e.g. psub.pas:953+ and all occurences of
pi_needs_stackframe in the compiler
I knew I should ask confirmation, I will adapt the docs to be more careful ;-)
Michael.
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