diff options
Diffstat (limited to 'src/test/incremental/thinlto')
3 files changed, 53 insertions, 2 deletions
diff --git a/src/test/incremental/thinlto/cgu_invalidated_via_import.rs b/src/test/incremental/thinlto/cgu_invalidated_via_import.rs index 8160f8f3a99..5fe435d796f 100644 --- a/src/test/incremental/thinlto/cgu_invalidated_via_import.rs +++ b/src/test/incremental/thinlto/cgu_invalidated_via_import.rs @@ -33,7 +33,9 @@ mod foo { #[cfg(not(cfail1))] pub fn inlined_fn() -> u32 { - 1234 + // See `cgu_keeps_identical_fn.rs` for why this is different + // from the other version of this function. + 12345 } } diff --git a/src/test/incremental/thinlto/cgu_keeps_identical_fn.rs b/src/test/incremental/thinlto/cgu_keeps_identical_fn.rs new file mode 100644 index 00000000000..0fd5abee118 --- /dev/null +++ b/src/test/incremental/thinlto/cgu_keeps_identical_fn.rs @@ -0,0 +1,47 @@ +// This test is almost identical to `cgu_invalided_via_import`, except that +// the two versions of `inline_fn` are identical. Neither version of `inlined_fn` +// ends up with any spans in its LLVM bitecode, so LLVM is able to skip +// re-building any modules which import 'inlined_fn' + +// revisions: cfail1 cfail2 cfail3 +// compile-flags: -Z query-dep-graph -O +// build-pass (FIXME(62277): could be check-pass?) + +#![feature(rustc_attrs)] +#![crate_type="rlib"] + +#![rustc_expected_cgu_reuse(module="cgu_keeps_identical_fn-foo", + cfg="cfail2", + kind="no")] +#![rustc_expected_cgu_reuse(module="cgu_keeps_identical_fn-foo", + cfg="cfail3", + kind="post-lto")] + +#![rustc_expected_cgu_reuse(module="cgu_keeps_identical_fn-bar", + cfg="cfail2", + kind="post-lto")] +#![rustc_expected_cgu_reuse(module="cgu_keeps_identical_fn-bar", + cfg="cfail3", + kind="post-lto")] + +mod foo { + + // Trivial functions like this one are imported very reliably by ThinLTO. + #[cfg(cfail1)] + pub fn inlined_fn() -> u32 { + 1234 + } + + #[cfg(not(cfail1))] + pub fn inlined_fn() -> u32 { + 1234 + } +} + +pub mod bar { + use foo::inlined_fn; + + pub fn caller() -> u32 { + inlined_fn() + } +} diff --git a/src/test/incremental/thinlto/independent_cgus_dont_affect_each_other.rs b/src/test/incremental/thinlto/independent_cgus_dont_affect_each_other.rs index 24e5d2438bd..045f2011958 100644 --- a/src/test/incremental/thinlto/independent_cgus_dont_affect_each_other.rs +++ b/src/test/incremental/thinlto/independent_cgus_dont_affect_each_other.rs @@ -37,7 +37,9 @@ mod foo { #[cfg(not(cfail1))] pub fn inlined_fn() -> u32 { - 1234 + // See `cgu_keeps_identical_fn.rs` for why this is different + // from the other version of this function. + 12345 } } |