coverage: Rename check_invoked_macro_name_span to maybe_push_macro_name_span

Author: Zalathar

compiler/rustc_mir_transform/src/coverage/spans.rs

@@ -288,7 +288,7 @@ impl<'a> CoverageSpansGenerator<'a> {
             // span-processing steps don't make sense yet.
             if self.some_prev.is_none() {
                 debug!("  initial span");
-                self.check_invoked_macro_name_span();
+                self.maybe_push_macro_name_span();
                 continue;
             }
 
@@ -300,15 +300,15 @@ impl<'a> CoverageSpansGenerator<'a> {
                 debug!("  same bcb (and neither is a closure), merge with prev={prev:?}");
                 let prev = self.take_prev();
                 self.curr_mut().merge_from(prev);
-                self.check_invoked_macro_name_span();
+                self.maybe_push_macro_name_span();
             // Note that curr.span may now differ from curr_original_span
             } else if prev.span.hi() <= curr.span.lo() {
                 debug!(
                     "  different bcbs and disjoint spans, so keep curr for next iter, and add prev={prev:?}",
                 );
                 let prev = self.take_prev();
                 self.push_refined_span(prev);
-                self.check_invoked_macro_name_span();
+                self.maybe_push_macro_name_span();
             } else if prev.is_closure {
                 // drop any equal or overlapping span (`curr`) and keep `prev` to test again in the
                 // next iter
@@ -347,7 +347,7 @@ impl<'a> CoverageSpansGenerator<'a> {
                 }
             } else {
                 self.cutoff_prev_at_overlapping_curr();
-                self.check_invoked_macro_name_span();
+                self.maybe_push_macro_name_span();
             }
         }
 
@@ -393,7 +393,9 @@ impl<'a> CoverageSpansGenerator<'a> {
         }
     }
 
-    fn check_invoked_macro_name_span(&mut self) {
+    /// If `curr` is part of a new macro expansion, carve out and push a separate
+    /// span that ends just after the macro name and its subsequent `!`.
+    fn maybe_push_macro_name_span(&mut self) {
         let curr = self.curr();
 
         let Some(visible_macro) = curr.visible_macro(self.body_span) else { return };