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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/105247] [11/12 Regression] IA64: ICE on sqlite-3.38.2:
 in decompose, at rtl.h:2288 since r11-5271-g4866b2f5db117f
Date: Wed, 13 Apr 2022 11:11:58 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105247

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The problem is that the ia64 backend for some strange reason uses DImode for
the
shift last operands, while e.g. in GIMPLE they are converted to
integer_type_node or so:
      /* Why oh why didn't Intel arrange for SHIFT_COUNT_TRUNCATED?  Now
         we've got to get rid of stray bits outside the SImode register.  */
      rtx subshift =3D gen_reg_rtx (DImode);
      emit_insn (gen_zero_extendsidi2 (subshift, operands[2]));
      operands[2] =3D subshift;
and simplify-rtx.cc simply uses the mode of the shift for the shift count.=