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target check_consistency: ensure target feature string makes some basic sense

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Ralf Jung
2024-11-24 09:11:11 +01:00
parent 4e4c20d2ab
commit 5d42f64ad2
1 changed files with 23 additions and 0 deletions
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23
compiler/rustc_target/src/spec/tests/tests_impl.rs
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@@ -1,5 +1,7 @@
use std::assert_matches::assert_matches; use std::assert_matches::assert_matches;
use rustc_data_structures::fx::FxHashSet;
use super::super::*; use super::super::*;
// Test target self-consistency and JSON encoding/decoding roundtrip. // Test target self-consistency and JSON encoding/decoding roundtrip.
@@ -170,6 +172,27 @@ impl Target {
} }
_ => {} _ => {}
} }
// Check that the given target-features string makes some basic sense.
if !self.features.is_empty() {
let mut features_enabled = FxHashSet::default();
let mut features_disabled = FxHashSet::default();
for feat in self.features.split(',') {
if let Some(feat) = feat.strip_prefix("+") {
features_enabled.insert(feat);
if features_disabled.contains(feat) {
panic!("target feature `{feat}` is both enabled and disabled");
}
} else if let Some(feat) = feat.strip_prefix("-") {
features_disabled.insert(feat);
if features_enabled.contains(feat) {
panic!("target feature `{feat}` is both enabled and disabled");
}
} else {
panic!("target feature `{feat}` is invalid, must start with `+` or `-`");
}
}
}
} }
// Add your target to the whitelist if it has `std` library // Add your target to the whitelist if it has `std` library