summaryrefslogtreecommitdiffstats
path: root/tests/run-make/coverage/lib/used_crate.rs
diff options
context:
space:
mode:
Diffstat (limited to 'tests/run-make/coverage/lib/used_crate.rs')
-rw-r--r--tests/run-make/coverage/lib/used_crate.rs100
1 files changed, 0 insertions, 100 deletions
diff --git a/tests/run-make/coverage/lib/used_crate.rs b/tests/run-make/coverage/lib/used_crate.rs
deleted file mode 100644
index 8b8b1f7f3..000000000
--- a/tests/run-make/coverage/lib/used_crate.rs
+++ /dev/null
@@ -1,100 +0,0 @@
-#![allow(unused_assignments, unused_variables)]
-// compile-flags: -C opt-level=3 # validates coverage now works with optimizations
-use std::fmt::Debug;
-
-pub fn used_function() {
- // Initialize test constants in a way that cannot be determined at compile time, to ensure
- // rustc and LLVM cannot optimize out statements (or coverage counters) downstream from
- // dependent conditions.
- let is_true = std::env::args().len() == 1;
- let mut countdown = 0;
- if is_true {
- countdown = 10;
- }
- use_this_lib_crate();
-}
-
-pub fn used_only_from_bin_crate_generic_function<T: Debug>(arg: T) {
- println!("used_only_from_bin_crate_generic_function with {:?}", arg);
-}
-// Expect for above function: `Unexecuted instantiation` (see below)
-pub fn used_only_from_this_lib_crate_generic_function<T: Debug>(arg: T) {
- println!("used_only_from_this_lib_crate_generic_function with {:?}", arg);
-}
-
-pub fn used_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
- println!("used_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
-}
-
-pub fn used_with_same_type_from_bin_crate_and_lib_crate_generic_function<T: Debug>(arg: T) {
- println!("used_with_same_type_from_bin_crate_and_lib_crate_generic_function with {:?}", arg);
-}
-
-pub fn unused_generic_function<T: Debug>(arg: T) {
- println!("unused_generic_function with {:?}", arg);
-}
-
-pub fn unused_function() {
- let is_true = std::env::args().len() == 1;
- let mut countdown = 2;
- if !is_true {
- countdown = 20;
- }
-}
-
-fn unused_private_function() {
- let is_true = std::env::args().len() == 1;
- let mut countdown = 2;
- if !is_true {
- countdown = 20;
- }
-}
-
-fn use_this_lib_crate() {
- used_from_bin_crate_and_lib_crate_generic_function("used from library used_crate.rs");
- used_with_same_type_from_bin_crate_and_lib_crate_generic_function(
- "used from library used_crate.rs",
- );
- let some_vec = vec![5, 6, 7, 8];
- used_only_from_this_lib_crate_generic_function(some_vec);
- used_only_from_this_lib_crate_generic_function("used ONLY from library used_crate.rs");
-}
-
-// FIXME(#79651): "Unexecuted instantiation" errors appear in coverage results,
-// for example:
-//
-// | Unexecuted instantiation: used_crate::used_only_from_bin_crate_generic_function::<_>
-//
-// These notices appear when `llvm-cov` shows instantiations. This may be a
-// default option, but it can be suppressed with:
-//
-// ```shell
-// $ `llvm-cov show --show-instantiations=0 ...`
-// ```
-//
-// The notice is triggered because the function is unused by the library itself,
-// and when the library is compiled, a synthetic function is generated, so
-// unused function coverage can be reported. Coverage can be skipped for unused
-// generic functions with:
-//
-// ```shell
-// $ `rustc -Zunstable-options -C instrument-coverage=except-unused-generics ...`
-// ```
-//
-// Even though this function is used by `uses_crate.rs` (and
-// counted), with substitutions for `T`, those instantiations are only generated
-// when the generic function is actually used (from the binary, not from this
-// library crate). So the test result shows coverage for all instantiated
-// versions and their generic type substitutions, plus the `Unexecuted
-// instantiation` message for the non-substituted version. This is valid, but
-// unfortunately a little confusing.
-//
-// The library crate has its own coverage map, and the only way to show unused
-// coverage of a generic function is to include the generic function in the
-// coverage map, marked as an "unused function". If the library were used by
-// another binary that never used this generic function, then it would be valid
-// to show the unused generic, with unknown substitution (`_`).
-//
-// The alternative is to exclude all generics from being included in the "unused
-// functions" list, which would then omit coverage results for
-// `unused_generic_function<T>()`, below.