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reduce miri code repetition like (n << amt) >> amt

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kenta7777 2019-02-24 08:57:24 +09:00
parent aadbc459bd
commit 46f1cc69db
1 changed files with 1 additions and 2 deletions
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3
src/librustc_mir/hair/constant.rs
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@ -21,8 +21,7 @@ crate fn lit_to_const<'a, 'gcx, 'tcx>(
let param_ty = ParamEnv::reveal_all().and(tcx.lift_to_global(&ty).unwrap());
let width = tcx.layout_of(param_ty).map_err(|_| LitToConstError::Reported)?.size;
trace!("trunc {} with size {} and shift {}", n, width.bits(), 128 - width.bits());
let shift = 128 - width.bits();
let result = (n << shift) >> shift;
let result = truncate(n, width);
trace!("trunc result: {}", result);
Ok(ConstValue::Scalar(Scalar::Bits {
bits: result,