src/test/incremental/thinlto/cgu_invalidated_via_import.rs

   1 // This test checks that the LTO phase is re-done for CGUs that import something
   2 // via ThinLTO and that imported thing changes while the definition of the CGU
   3 // stays untouched.
   4
   5 // revisions: cfail1 cfail2 cfail3
   6 // compile-flags: -Z query-dep-graph -O
   7 // build-pass (FIXME(62277): could be check-pass?)
   8
   9 #![feature(rustc_attrs)]
  10 #![crate_type="rlib"]
  11
  12 #![rustc_expected_cgu_reuse(module="cgu_invalidated_via_import-foo",
  13                             cfg="cfail2",
  14                             kind="no")]
  15 #![rustc_expected_cgu_reuse(module="cgu_invalidated_via_import-foo",
  16                             cfg="cfail3",
  17                             kind="post-lto")]
  18
  19 #![rustc_expected_cgu_reuse(module="cgu_invalidated_via_import-bar",
  20                             cfg="cfail2",
  21                             kind="pre-lto")]
  22 #![rustc_expected_cgu_reuse(module="cgu_invalidated_via_import-bar",
  23                             cfg="cfail3",
  24                             kind="post-lto")]
  25
  26 mod foo {
  27
  28     // Trivial functions like this one are imported very reliably by ThinLTO.
  29     #[cfg(cfail1)]
  30     pub fn inlined_fn() -> u32 {
  31         1234
  32     }
  33
  34     #[cfg(not(cfail1))]
  35     pub fn inlined_fn() -> u32 {
  36         1234
  37     }
  38 }
  39
  40 pub mod bar {
  41     use foo::inlined_fn;
  42
  43     pub fn caller() -> u32 {
  44         inlined_fn()
  45     }
  46 }