message: Error on non-constant simd_insert/simd_extract index
diff: @@ -121,12 +121,10 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>(
  let idx_const = if let Some(idx_const) = crate::constant::mir_operand_get_const_val(fx, idx) {
  idx_const
  } else {
  - fx.tcx.sess.span_warn(
  - fx.mir.span,
  - "`#[rustc_arg_required_const(..)]` is not yet supported. Calling this function will panic.",
  + fx.tcx.sess.span_fatal(
  + span,
  + "Index argument for `simd_insert` is not a constant",
  );
  - crate::trap::trap_unimplemented(fx, "`#[rustc_arg_required_const(..)]` is not yet supported.");
  - return;
  };
  let idx = idx_const.val.try_to_bits(Size::from_bytes(4 /* u32*/)).expect(&format!("kind not scalar: {:?}", idx_const));
  @@ -145,13 +143,10 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>(
  let idx_const = if let Some(idx_const) = crate::constant::mir_operand_get_const_val(fx, idx) {
  idx_const
  } else {
  - fx.tcx.sess.span_warn(
  - fx.mir.span,
  - "`#[rustc_arg_required_const(..)]` is not yet supported. Calling this function will panic.",
  + fx.tcx.sess.span_fatal(
  + span,
  + "Index argument for `simd_extract` is not a constant",
  );
  - let val = crate::trap::trap_unimplemented_ret_value(fx, ret.layout(), "`#[rustc_arg_required_const(..)]` is not yet supported.");
  - ret.write_cvalue(fx, val);
  - return;
  };
  let idx = idx_const.val.try_to_bits(Size::from_bytes(4 /* u32*/)).expect(&format!("kind not scalar: {:?}", idx_const));
  