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Diffstat (limited to '')
-rw-r--r-- | src/test/incremental/thinlto/cgu_keeps_identical_fn.rs | 72 |
1 files changed, 72 insertions, 0 deletions
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 000000000..31f329a7f --- /dev/null +++ b/src/test/incremental/thinlto/cgu_keeps_identical_fn.rs @@ -0,0 +1,72 @@ +// 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 cfail4 cfail5 cfail6 +// [cfail4]compile-flags: -Zincremental-relative-spans +// [cfail5]compile-flags: -Zincremental-relative-spans +// [cfail6]compile-flags: -Zincremental-relative-spans +// 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-foo", + cfg = "cfail5", + kind = "post-lto" +)] +#![rustc_expected_cgu_reuse( + module = "cgu_keeps_identical_fn-foo", + cfg = "cfail6", + 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" +)] +#![rustc_expected_cgu_reuse( + module = "cgu_keeps_identical_fn-bar", + cfg = "cfail5", + kind = "post-lto" +)] +#![rustc_expected_cgu_reuse( + module = "cgu_keeps_identical_fn-bar", + cfg = "cfail6", + kind = "post-lto" +)] + +mod foo { + + // Trivial functions like this one are imported very reliably by ThinLTO. + #[cfg(any(cfail1, cfail4))] + pub fn inlined_fn() -> u32 { + 1234 + } + + #[cfg(not(any(cfail1, cfail4)))] + pub fn inlined_fn() -> u32 { + 1234 + } +} + +pub mod bar { + use foo::inlined_fn; + + pub fn caller() -> u32 { + inlined_fn() + } +} |