coverage: Add a synthetic test for when all spans are discarded

1 files changed, 8 insertions, 2 deletions

diff --git a/compiler/rustc_session/src/config.rs b/compiler/rustc_session/src/config.rs
index 4784a4d1953..047e920e688 100644
--- a/compiler/rustc_session/src/config.rs
+++ b/compiler/rustc_session/src/config.rs
@@ -147,18 +147,24 @@ pub enum InstrumentCoverage {
     Yes,
 }
 
-/// Individual flag values controlled by `-Z coverage-options`.
+/// Individual flag values controlled by `-Zcoverage-options`.
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Default)]
 pub struct CoverageOptions {
     pub level: CoverageLevel,
 
-    /// `-Z coverage-options=no-mir-spans`: Don't extract block coverage spans
+    /// `-Zcoverage-options=no-mir-spans`: Don't extract block coverage spans
     /// from MIR statements/terminators, making it easier to inspect/debug
     /// branch and MC/DC coverage mappings.
     ///
     /// For internal debugging only. If other code changes would make it hard
     /// to keep supporting this flag, remove it.
     pub no_mir_spans: bool,
+
+    /// `-Zcoverage-options=discard-all-spans-in-codegen`: During codgen,
+    /// discard all coverage spans as though they were invalid. Needed by
+    /// regression tests for #133606, because we don't have an easy way to
+    /// reproduce it from actual source code.
+    pub discard_all_spans_in_codegen: bool,
 }
 
 /// Controls whether branch coverage or MC/DC coverage is enabled.