When building jpeg-xl (https://gitlab.com/wg1/jpeg-xl/), I am encountering the following ICE on Fedora Rawhide with GCC 11:

*** WARNING *** there are active plugins, do not report this as a bug unless you can reproduce it without enabling any plugins.
Event                            | Plugins
PLUGIN_FINISH_UNIT               | annobin: Generate final annotations
PLUGIN_START_UNIT                | annobin: Generate global annotations
PLUGIN_ALL_PASSES_START          | annobin: Generate per-function annotations
PLUGIN_ALL_PASSES_END            | annobin: Register per-function end symbols
during RTL pass: expand
In file included from /usr/lib/gcc/x86_64-redhat-linux/11/include/immintrin.h:47,
                 from /usr/include/hwy/ops/x86_256-inl.h:22,
                 from /usr/include/hwy/highway.h:231,
                 from /builddir/build/BUILD/jpeg-xl-v0.2-31c71b0f61123a40789b0b8f54feb70e5995420e/lib/jxl/entropy_coder.cc:27,
                 from /usr/include/hwy/foreach_target.h:91,
                 from /builddir/build/BUILD/jpeg-xl-v0.2-31c71b0f61123a40789b0b8f54feb70e5995420e/lib/jxl/entropy_coder.cc:26:
/usr/lib/gcc/x86_64-redhat-linux/11/include/avx2intrin.h: In function 'jxl::N_AVX3::NumNonZeroExceptLLF(unsigned long, unsigned long, jxl::AcStrategy, unsigned long, unsigned long, float const*, unsigned long, int*)':
/usr/lib/gcc/x86_64-redhat-linux/11/include/avx2intrin.h:121:33: internal compiler error: in emit_move_insn, at expr.c:3819
  121 |   return (__m256i) ((__v8su)__A + (__v8su)__B);
      |                    ~~~~~~~~~~~~~^~~~~~~~~~~~~~
0x15f8bc9 diagnostic_impl(rich_location*, diagnostic_metadata const*, int, char const*, __va_list_tag (*) [1], diagnostic_t)
	???:0
0xfc2e35 internal_error(char const*, ...)
	???:0
0xfc2e71 fancy_abort(char const*, int, char const*)
	???:0
0x7ba045 emit_move_insn(rtx_def*, rtx_def*) [clone .cold]
	???:0
0xad9b5f ix86_expand_int_vec_cmp(rtx_def**)
	???:0
0xd808c1 gen_vec_cmpv8siv8si(rtx_def*, rtx_def*, rtx_def*, rtx_def*)
	???:0
0x14d8389 maybe_expand_insn(insn_code, unsigned int, expand_operand*)
	???:0
0x14d9229 expand_insn(insn_code, unsigned int, expand_operand*)
	???:0
0x8a3b21 expand_vec_cmp_expr(tree_node*, tree_node*, rtx_def*)
	???:0
0x7c259c do_store_flag(separate_ops*, rtx_def*, machine_mode) [clone .cold]
	???:0
0x113ecb6 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode, expand_modifier)
	???:0
0x113c6da expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool)
	???:0
0x113c930 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool)
	???:0
0x113c400 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool)
	???:0
0x113c930 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool)
	???:0
0x113c400 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool)
	???:0
0x114061a expand_operands(tree_node*, tree_node*, rtx_def*, rtx_def**, rtx_def**, expand_modifier)
	???:0
0x113ef03 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode, expand_modifier)
	???:0
0x10dfd26 expand_gimple_stmt(gimple*)
	???:0
0x10dc17b (anonymous namespace)::pass_expand::execute(function*)
	???:0
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://bugzilla.redhat.com/bugzilla> for instructions.

Full log: https://copr.fedorainfracloud.org/coprs/eclipseo/jpeg-xl/build/1859311/

The project builds fine with GCC 10.2.1 and Clang.

Please instruct on how to get the backtrace and which preprocessed source you need.