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From: "xry111 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/113727] csmith: differences from nothing to -O1
Date: Sat, 03 Feb 2024 18:54:42 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113727

--- Comment #12 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
(In reply to David Binderman from comment #11)
> Created attachment 57310 [details]
> C source code

static uint32_t (safe_mul_func_uint32_t_u_u)(uint32_t ui1, uint32_t ui2 ) {=
=20
}

This thing is UB if you use its return value (in C; in C++ it will be an UB
even if the return value is not used).

Better adding -Werror=3Dreturn-type to cvise.=