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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/97532] [11 Regression] Error: insn does not satisfy its
 constraints, internal compiler error: in extract_constrain_insn, at
 recog.c:2196
Date: Thu, 22 Oct 2020 19:03:30 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97532

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The operand in this case is the whole
(vec_duplicate:V8DF (mem:DF (reg...) [6 *fact_18(D)+0 S8 A64]))
which matches the
(define_special_memory_constraint "Br"
  "@internal bcst memory operand."
  (match_operand 0 "bcst_mem_operand"))
constraint where bcst_mem_operand is:
(define_predicate "bcst_mem_operand"
  (and (match_code "vec_duplicate")
       (and (match_test "TARGET_AVX512F")
            (ior (match_test "TARGET_AVX512VL")
                 (match_test "GET_MODE_SIZE (GET_MODE (op)) =3D=3D 64")))
       (match_test "VALID_BCST_MODE_P (GET_MODE_INNER (GET_MODE (op)))")
       (match_test "memory_operand (XEXP (op, 0), GET_MODE (XEXP (op, 0)))"=
)))
I think the extract_mem_from_operand function has been introduced for this =
in
LRA, but perhaps it is not used in all the places where it is needed.=