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From: "tnfchris at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/103311] [12 Regression] ICE in
 complex_mul_pattern::build(vec_info*) since
 r12-4785-ged3de62ac949c92ad41ef6de7cc926fbb2a510ce
Date: Thu, 18 Nov 2021 11:46:16 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103311

Tamar Christina <tnfchris at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |tnfchris at gcc dot=
 gnu.org

--- Comment #2 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Both sides of the VEC_PERM_EXPR need to be a multiply,

the check is currently

 if (!mul0 && !mul1)
    return IFN_LAST;

while it should be

 if (!mul0 || !mul1)
    return IFN_LAST;

testing a patch.=