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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/105231] [12 Regression] ICE: in
 rtl_verify_bb_insns, at cfgrtl.cc:2797 (flow control insn inside a basic
 block) with custom flags since r12-4767-g81342e95827f77c0
Date: Tue, 12 Apr 2022 11:39:21 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105231

--- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
It is true that float_extend from a constant or constant pool memory if the
constant isn't NaN should never raise any kind of exception or trap.
Shouldn't we handle that in may_trap_p_1 or whatever considers the RTL
potentially trapping or raising exception?
At least assuming it is a conversion between modes where the outer mode can
represent all the values of the inner mode.=