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From: "bruno at clisp dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/100735] -fno-trampolines doc wrongly implies it affects
 C, C++ etc.
Date: Mon, 24 May 2021 10:24:45 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100735

Bruno Haible <bruno at clisp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bruno at clisp dot org

--- Comment #1 from Bruno Haible <bruno at clisp dot org> ---
(In reply to Paul Eggert from comment #0)
> it is silently ignored for these languages, and I assume for any language
> other than Ada.

Confirmed: flag_trampolines matters only for calls with the ECF_BY_DESCRIPT=
OR
bit set or CALL_EXPR_BY_DESCRIPTOR being true. Other than from the Ada back=
end,
such calls are generated only from gimple nodes with subcode bit
GF_CALL_BY_DESCRIPTOR set. GF_CALL_BY_DESCRIPTOR gets set through
gimple_call_set_by_descriptor with argument true, and such calls exist only=
 as
consequence of tree nodes with CALL_EXPR_BY_DESCRIPTOR being true.=