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From: "sen2403 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/91299] LTO inlines a weak definition in presence of a
 non-weak definition from an ELF file
Date: Thu, 25 Aug 2022 13:01:40 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D91299

--- Comment #12 from Eason Lai <sen2403 at hotmail dot com> ---
Hope this information could help.

I added "-fopt-info-inline-optimized-missed=3Dinline.txt" in the CFLAGS to =
see
what happens between -Os and -O1.

Here is the output when using "-O1":
missed:   not inlinable: main/5 -> get_t/4, function not inline candidate

Here is the output when using "-Os":
main.c:13:9: missed:   not inlinable: main/5 -> get_t/4, function body can =
be
overwritten at link time
optimized:  Inlined get_t/4 into main/5 which now has time 3.000000 and siz=
e 4,
net change of +0.

It happens in ipa-inline.c::inline_small_functions when using "-O2" or abov=
e.=