Similarly fails:

$ gcc /home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/vshuf-v32hi.c -Og -mavx512vp2intersect
during GIMPLE pass: fre
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/vshuf-v32hi.c: In function ‘test_27’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/torture/vshuf-v32hi.c:12: internal compiler error: in gen_reg_rtx, at emit-rtl.c:1199
0x69c2a8 gen_reg_rtx(machine_mode)
	/home/marxin/Programming/gcc/gcc/emit-rtl.c:1199
0xafb406 force_reg(machine_mode, rtx_def*)
	/home/marxin/Programming/gcc/gcc/explow.c:686
0xafb406 force_reg(machine_mode, rtx_def*)
	/home/marxin/Programming/gcc/gcc/explow.c:666
0x12fe673 ix86_expand_vec_one_operand_perm_avx512
	/home/marxin/Programming/gcc/gcc/config/i386/i386-expand.c:18124
0x12fe673 expand_vec_perm_1
	/home/marxin/Programming/gcc/gcc/config/i386/i386-expand.c:18302
0x12fe820 expand_vec_perm_1
	/home/marxin/Programming/gcc/gcc/config/i386/i386-expand.c:18311
0x13007e8 ix86_expand_vec_perm_const_1
	/home/marxin/Programming/gcc/gcc/config/i386/i386-expand.c:20702
0x1328bb2 ix86_vectorize_vec_perm_const(machine_mode, rtx_def*, rtx_def*, rtx_def*, vec_perm_indices const&)
	/home/marxin/Programming/gcc/gcc/config/i386/i386-expand.c:21002
0x14db5ce gimple_simplify_VEC_PERM_EXPR
	/dev/shm/objdir/gcc/gimple-match.c:154152
0x13405c8 gimple_resimplify3
	/home/marxin/Programming/gcc/gcc/gimple-match-head.c:396
0x14dca97 gimple_simplify(gimple*, gimple_match_op*, gimple**, tree_node* (*)(tree_node*), tree_node* (*)(tree_node*))
	/home/marxin/Programming/gcc/gcc/gimple-match-head.c:1002
0xbb0f10 gimple_fold_stmt_to_constant_1(gimple*, tree_node* (*)(tree_node*), tree_node* (*)(tree_node*))
	/home/marxin/Programming/gcc/gcc/gimple-fold.c:7330
0x10a1ab5 try_to_simplify
	/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:5428
0x10a1ab5 visit_stmt
	/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:5471
0x10a2d86 process_bb
	/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:7239
0x10a4642 do_rpo_vn
	/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:7837
0x10a5e5a execute
	/home/marxin/Programming/gcc/gcc/tree-ssa-sccvn.c:7991
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

I'll have a look.

Created attachment 51286 [details]
gcc12-pr101860.patch

Untested fix.

*** Bug 101863 has been marked as a duplicate of this bug. ***

The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:04b4f3152593f85b05974528d1607619dd77d702

commit r12-2876-g04b4f3152593f85b05974528d1607619dd77d702
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu Aug 12 11:26:57 2021 +0200

    i386: Fix up V32HImode permutations with -mno-avx512bw [PR101860]
    
    My patch from yesterday apparently broke some V32HImode permutations
    as the testcase shows.
    The first function assumed it would never be called in d->testing_p mode
    and so went right away into emitting the code.
    And the second one assumed V32HImode would never reach it, which now
    can for the !TARGET_AVX512BW case.  We don't have a instruction
    in that case though.
    
    2021-08-12  Jakub Jelinek  <jakub@redhat.com>
    
            PR target/101860
            * config/i386/i386-expand.c (ix86_expand_vec_one_operand_perm_avx512):
            If d->testing_p, return true after performing checks instead of
            actually expanding the insn.
            (expand_vec_perm_broadcast_1): Handle V32HImode - assert
            !TARGET_AVX512BW and return false.
    
            * gcc.target/i386/avx512f-pr101860.c: New test.

Fixed.