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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/95654] nvptx offloading: FAIL:
 libgomp.fortran/pr66199-5.f90   -O3 -fomit-frame-pointer -funroll-loops
 -fpeel-loops -ftracer -finline-functions  execution test
Date: Thu, 17 Sep 2020 09:33:48 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95654

--- Comment #10 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to Tobias Burnus from comment #9)
> See also thread at:
>   https://gcc.gnu.org/pipermail/gcc-patches/2020-September/thread.html#55=
4054

Regarding the patch there, the proper way is to adapt can_duplicate_block_p,
which calls the associated cfg_hooks->can_duplicate_block_p.

Currently, there is the stub (in gimple_cfg_hooks)
  tree-cfg.c:  gimple_can_duplicate_bb_p
and (for rtl_cfg_hooks and cfg_layout_rtl_cfg_hooks)
  cfgrtl.c:    cfg_layout_can_duplicate_bb_p
the latter avoids duplicate tablejumps and calls
targetm.cannot_copy_insn_p.=