diff options
Diffstat (limited to 'src/test/incremental/hygiene/load_cached_hygiene.rs')
-rw-r--r-- | src/test/incremental/hygiene/load_cached_hygiene.rs | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/test/incremental/hygiene/load_cached_hygiene.rs b/src/test/incremental/hygiene/load_cached_hygiene.rs new file mode 100644 index 000000000..812414141 --- /dev/null +++ b/src/test/incremental/hygiene/load_cached_hygiene.rs @@ -0,0 +1,48 @@ +// revisions:rpass1 rpass2 +// compile-flags: -Z query-dep-graph +// aux-build:cached_hygiene.rs + +// This tests the folllowing scenario +// 1. A foreign crate is compiled with incremental compilation. +// This causes hygiene information to be saved to the incr cache. +// 2. One function is the foreign crate is modified. This causes the +// optimized mir for an unmodified function to be loaded from the +// incremental cache and written out to the crate metadata. +// 3. In the process of loading and writing out this function's MIR, +// we load hygiene information from the incremental cache and +// write it to our metadata. +// 4. This hygiene information is loaded by another crate (this file) + +// Previously, this situation would cause hygiene identifiers +// (SyntaxContexts and ExpnIds) to get corrupted when we tried to +// serialize the hygiene information loaded from the incr cache into +// the metadata. Specifically, we were not resetting `orig_id` +// for an `EpxnData` generate in the current crate, which would cause +// us to serialize the `ExpnId` pointing to a garbage location in +// the metadata. + +#![feature(rustc_attrs)] + +#![rustc_partition_reused(module="load_cached_hygiene-call_unchanged_function", cfg="rpass2")] +#![rustc_partition_codegened(module="load_cached_hygiene-call_changed_function", cfg="rpass2")] + + +extern crate cached_hygiene; + +pub mod call_unchanged_function { + + pub fn unchanged() { + cached_hygiene::unchanged_fn(); + } +} + +pub mod call_changed_function { + pub fn changed() { + cached_hygiene::changed_fn(); + } +} + +pub fn main() { + call_unchanged_function::unchanged(); + call_changed_function::changed(); +} |