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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/104717] [9/10/11/12 Regression] ICE:
 verify_ssa failed (Error: type mismatch between an SSA_NAME and its symbol)
Date: Tue, 01 Mar 2022 08:38:43 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104717

--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
The test that is failing, is:
...
760       if (SSA_NAME_VAR (ssa_name) !=3D NULL_TREE
761           && TREE_TYPE (ssa_name) !=3D TREE_TYPE (SSA_NAME_VAR (ssa_nam=
e)))
762         {
763           error ("type mismatch between an SSA_NAME and its symbol");
764           return true;
765         }
...

For ssa-name:
...
(gdb) call debug_generic_expr (name)
A.14_21
(gdb) call debug_tree (name)
 <ssa_name 0x7ffff6351e10
    type <pointer_type 0x7ffff673abd0
        type <array_type 0x7ffff673ab28 type <integer_type 0x7ffff655b5e8
integer(kind=3D4)>
            sizes-gimplified BLK size <var_decl 0x7ffff634f3f0 D.4328>
unit-size <var_decl 0x7ffff634f480 D.4329>
            align:32 warn_if_not_align:0 symtab:0 alias-set -1
structural-equality domain <integer_type 0x7ffff673aa80>
            pointer_to_this <pointer_type 0x7ffff673abd0>>
        public unsigned DI
        size <integer_cst 0x7ffff6543c00 constant 64>
        unit-size <integer_cst 0x7ffff6543c18 constant 8>
        align:64 warn_if_not_align:0 symtab:0 alias-set -1 structural-equal=
ity>
    var <var_decl 0x7ffff6356c60 A.14>
    def_stmt A.14_21 =3D __builtin_alloca_with_align (_19, 32);
    version:21
    ptr-info 0x7ffff63459f0>
...

The mismatch seems to be:
...
(gdb) call debug_generic_expr (name.typed.type)
integer(kind=3D4)[0:D.4266] *
(gdb) call debug_generic_expr (name.ssa_name.var.typed.type)
integer(kind=3D4)[0:D.4433] *
...=