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From: "linkw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/106322] [12/13 Regression] tree-vectorize:
 Wrong code at O2 level (-fno-tree-vectorize is working) since
 r12-2404-ga1d27560770818c5
Date: Wed, 10 Aug 2022 06:24:22 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106322

--- Comment #40 from Kewen Lin <linkw at gcc dot gnu.org> ---
> >diff --git a/gcc/internal-fn.cc b/gcc/internal-fn.cc
> >index d666ccccf67..7d8b4ac2200 100644
> >--- a/gcc/internal-fn.cc
> >+++ b/gcc/internal-fn.cc
> >@@ -3750,7 +3750,12 @@ static bool
> > direct_optab_supported_p (direct_optab optab, tree_pair types,
> > 			  optimization_type opt_type)
> > {
> >-  machine_mode mode =3D TYPE_MODE (types.first);
> >+  tree type =3D types.first;
> >+  machine_mode mode =3D TYPE_MODE (type);
> >+  /* Scalar mode optab can't work for vector type, return false if
> >+     the given type is vector type but the mode isn't vector mode.  */
> >+  if (VECTOR_TYPE_P (type) !=3D VECTOR_MODE_P (mode))
> >+    return false;
>=20
> There are a few which scalar mode and vector types can differ and still
> work: IOR, XOR, and AND. I wonder if those should be special cased here or
> somewhere else.

Good point! This is overkill then. Not sure if there is this kind of routin=
e to
special case them.=