[clang-tools-extra] include-cleaner: Report function decls from __cleanup__ as used (PR #138669)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang-tools-extra

Author: Daan De Meyer (DaanDeMeyer)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/138669.diff


2 Files Affected:

- (modified) clang-tools-extra/include-cleaner/lib/WalkAST.cpp (+5) 
- (modified) clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp (+6) 


``````````diff
diff --git a/clang-tools-extra/include-cleaner/lib/WalkAST.cpp b/clang-tools-extra/include-cleaner/lib/WalkAST.cpp
index dff0c711f04c5..ba6eff49e9c98 100644
--- a/clang-tools-extra/include-cleaner/lib/WalkAST.cpp
+++ b/clang-tools-extra/include-cleaner/lib/WalkAST.cpp
@@ -321,6 +321,11 @@ class ASTWalker : public RecursiveASTVisitor<ASTWalker> {
     return true;
   }
 
+  bool VisitCleanupAttr(CleanupAttr *attr) {
+    report(attr->getLocation(), attr->getFunctionDecl());
+    return true;
+  }
+
   // TypeLoc visitors.
   void reportType(SourceLocation RefLoc, NamedDecl *ND) {
     // Reporting explicit references to types nested inside classes can cause
diff --git a/clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp b/clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp
index e45ea36f7938e..19695a34bd63e 100644
--- a/clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp
+++ b/clang-tools-extra/include-cleaner/unittests/WalkASTTest.cpp
@@ -570,5 +570,11 @@ TEST(WalkAST, OperatorNewDelete) {
   testWalk("struct A { static void $ambiguous^operator delete(void*); };",
            "void foo() { A a; ^delete &a; }");
 }
+
+TEST(WalkAST, CleanupAttr) {
+  testWalk("void* $explicit^freep(void *p);",
+           "void foo() { __attribute__((^__cleanup__(freep))) char* x = 0; }");
+}
+
 } // namespace
 } // namespace clang::include_cleaner

``````````

</details>


https://github.com/llvm/llvm-project/pull/138669