tests/mir-opt/const_prop/boxes.rs

   1 // skip-filecheck
   2 // unit-test: ConstProp
   3 // compile-flags: -O
   4 // EMIT_MIR_FOR_EACH_PANIC_STRATEGY
   5
   6 #![feature(rustc_attrs, stmt_expr_attributes)]
   7
   8 // Note: this test verifies that we, in fact, do not const prop `#[rustc_box]`
   9
  10 // EMIT_MIR boxes.main.ConstProp.diff
  11 fn main() {
  12     let x = *(#[rustc_box]
  13     Box::new(42))
  14         + 0;
  15 }