message: Remove sign extension for ty::Int from CValue::const_val
diff: @@ -217,17 +217,13 @@ pub(crate) fn const_val(
  .iconst(types::I64, (const_val >> 64) as u64 as i64);
  fx.bcx.ins().iconcat(lsb, msb)
  }
  - ty::Bool | ty::Char | ty::Uint(_) | ty::Ref(..)
  + ty::Bool | ty::Char | ty::Uint(_) | ty::Int(_) | ty::Ref(..)
  | ty::RawPtr(..) => {
  fx
  .bcx
  .ins()
  .iconst(clif_ty, u64::try_from(const_val).expect("uint") as i64)
  }
  - ty::Int(_) => {
  - let const_val = rustc_middle::mir::interpret::sign_extend(const_val, layout.size);
  - fx.bcx.ins().iconst(clif_ty, i64::try_from(const_val as i128).unwrap())
  - }
  ty::Float(FloatTy::F32) => {
  fx.bcx.ins().f32const(Ieee32::with_bits(u32::try_from(const_val).unwrap()))
  }
  