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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/113404] ICE: in to_constant, at poly-int.h:588 with
 -march=rv64gcv -mbig-endian --param=riscv-vector-abi
Date: Tue, 16 Jan 2024 03:20:45 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113404

--- Comment #1 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Pan Li <panli@gcc.gnu.org>:

https://gcc.gnu.org/g:5134d3074ad7a462b4c8e2c0bc904b5ba40b7373

commit r14-7271-g5134d3074ad7a462b4c8e2c0bc904b5ba40b7373
Author: Juzhe-Zhong <juzhe.zhong@rivai.ai>
Date:   Tue Jan 16 11:04:49 2024 +0800

    RISC-V: Report Sorry when users enable RVV in big-endian mode [PR113404]

    As PR113404 mentioned: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D1=
13404

    We have ICE when we enable RVV in big-endian mode:

    during RTL pass: expand
    a-float-point-dynamic-frm-66.i:2:14: internal compiler error: in
to_constant, at poly-int.h:588
    0xab4c2c poly_int<2u, unsigned short>::to_constant() const
            /repo/gcc-trunk/gcc/poly-int.h:588
    0xab4de1 poly_int<2u, unsigned short>::to_constant() const
            /repo/gcc-trunk/gcc/tree.h:4055
    0xab4de1 default_function_arg_padding(machine_mode, tree_node const*)
            /repo/gcc-trunk/gcc/targhooks.cc:844
    0x12e2327 locate_and_pad_parm(machine_mode, tree_node*, int, int, int,
tree_node*, args_size*, locate_and_pad_arg_data*)
            /repo/gcc-trunk/gcc/function.cc:4061
    0x12e2aca assign_parm_find_entry_rtl
            /repo/gcc-trunk/gcc/function.cc:2614
    0x12e2c89 assign_parms
            /repo/gcc-trunk/gcc/function.cc:3693
    0x12e59df expand_function_start(tree_node*)
            /repo/gcc-trunk/gcc/function.cc:5152
    0x112fafb execute
            /repo/gcc-trunk/gcc/cfgexpand.cc:6739

    Report users that we don't support RVV in big-endian mode for the follo=
wing
reasons:
    1. big-endian in RISC-V is pretty rare case.
    2. We didn't test RVV in big-endian and we don't have enough time to te=
st
it since it's stage 4 now.

    Naive disallow RVV in big-endian.

    Tested no regression, ok for trunk ?

    gcc/ChangeLog:

            PR target/113404
            * config/riscv/riscv.cc (riscv_override_options_internal): Repo=
rt
sorry
            for RVV in big-endian mode.

    gcc/testsuite/ChangeLog:

            PR target/113404
            * gcc.target/riscv/rvv/base/big_endian-1.c: New test.
            * gcc.target/riscv/rvv/base/big_endian-2.c: New test.=