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From: "burnus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/110800] [gcn] ICE (segfault) 'during RTL pass: jump' in
 delete_trivially_dead_insns -> count_reg_usage when C++ exceptions are
 enabled + used
Date: Tue, 25 Jul 2023 10:18:36 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110800

Tobias Burnus <burnus at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[gcn] ICE (segfault)        |[gcn] ICE (segfault)
                   |'during RTL pass: jump' in  |'during RTL pass: jump' in
                   |delete_trivially_dead_insns |delete_trivially_dead_insns
                   |-> count_reg_usage          |-> count_reg_usage when C++
                   |                            |exceptions are enabled +
                   |                            |used

--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> ---
The ICE is turned into plenty of linker errors (such as 'undefined symbol:
operator delete[](void*)') when compiling with:

   -fno-exceptions

It seems as if something goes wrong when exceptions are encountered. Still,=
 an
ICE is wrong.

For the sister testcase, test_target_struct_obj_access.cpp (same pull reque=
st),
it fails with tons of:
  cc45cyOP.mkoffload.2.s:2601:1: error: symbol '.LEHE1' is already defined

That's actually how I found the -fno-exception as LEHE is added in
  gcc/except.cc:      ASM_GENERATE_INTERNAL_LABEL (reg_start_lab, "LEHB",
call_site_base + i);
  gcc/final.cc:     ASM_OUTPUT_DEBUG_LABEL (asm_out_file, "LEHB",=