mirror of https://github.com/rust-lang/rust
68 lines
1.5 KiB
Rust
68 lines
1.5 KiB
Rust
#![feature(coverage_attribute)]
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//@ edition: 2021
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//@ compile-flags: -Copt-level=0 -Zmir-opt-level=3
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// Regression test for <https://github.com/rust-lang/rust/issues/117012>.
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//
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// If some coverage counters were removed by MIR optimizations, we need to take
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// care not to refer to those counter IDs in coverage mappings, and instead
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// replace them with a constant zero value. If we don't, `llvm-cov` might see
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// a too-large counter ID and silently discard the entire function from its
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// coverage reports.
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#[derive(Debug, PartialEq, Eq)]
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struct Foo(u32);
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fn eq_good() {
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println!("a");
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assert_eq!(Foo(1), Foo(1));
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}
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fn eq_good_message() {
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println!("b");
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assert_eq!(Foo(1), Foo(1), "message b");
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}
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fn ne_good() {
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println!("c");
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assert_ne!(Foo(1), Foo(3));
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}
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fn ne_good_message() {
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println!("d");
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assert_ne!(Foo(1), Foo(3), "message d");
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}
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fn eq_bad() {
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println!("e");
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assert_eq!(Foo(1), Foo(3));
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}
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fn eq_bad_message() {
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println!("f");
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assert_eq!(Foo(1), Foo(3), "message f");
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}
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fn ne_bad() {
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println!("g");
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assert_ne!(Foo(1), Foo(1));
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}
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fn ne_bad_message() {
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println!("h");
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assert_ne!(Foo(1), Foo(1), "message h");
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}
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#[coverage(off)]
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fn main() {
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eq_good();
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eq_good_message();
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ne_good();
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ne_good_message();
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assert!(std::panic::catch_unwind(eq_bad).is_err());
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assert!(std::panic::catch_unwind(eq_bad_message).is_err());
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assert!(std::panic::catch_unwind(ne_bad).is_err());
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assert!(std::panic::catch_unwind(ne_bad_message).is_err());
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}
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