[Coverage] Handle array decomposition correctly (#88881)

`ArrayInitLoopExpr` AST node has two occurences of its as-written
initializing expression in its subexpressions through a non-unique
`OpaqueValueExpr`. It causes double-visiting of the initializing
expression if not handled explicitly, as discussed in #85837.

1 files changed, 4 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CoverageMappingGen.cpp b/clang/lib/CodeGen/CoverageMappingGen.cpp
index e465600..cc8ab7a 100644
--- a/clang/lib/CodeGen/CoverageMappingGen.cpp
+++ b/clang/lib/CodeGen/CoverageMappingGen.cpp
@@ -2177,6 +2177,10 @@ struct CounterCoverageMappingBuilder
     // propagate counts into them.
   }
 
+  void VisitArrayInitLoopExpr(const ArrayInitLoopExpr *AILE) {
+    Visit(AILE->getCommonExpr()->getSourceExpr());
+  }
+
   void VisitPseudoObjectExpr(const PseudoObjectExpr *POE) {
     // Just visit syntatic expression as this is what users actually write.
     VisitStmt(POE->getSyntacticForm());