[PATCH] D154421: [clang][dataflow] Add a test for a struct that is directly self-referential through a reference.

[Martin Böhme via Phabricator via cfe-commits]

mboehme created this revision.
Herald added subscribers: martong, xazax.hun.
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mboehme requested review of this revision.
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The ongoing migration to strict handling of value
categories (see https://discourse.llvm.org/t/70086) will change the way we
handle fields of reference type, and I want to put a test in place that makes
sure we continue to handle this special case correctly.

Depends On D154420 <https://reviews.llvm.org/D154420>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D154421

Files:
  clang/unittests/Analysis/FlowSensitive/TransferTest.cpp


Index: clang/unittests/Analysis/FlowSensitive/TransferTest.cpp
===================================================================
--- clang/unittests/Analysis/FlowSensitive/TransferTest.cpp
+++ clang/unittests/Analysis/FlowSensitive/TransferTest.cpp
@@ -656,6 +656,28 @@
       });
 }
 
+TEST(TransferTest, DirectlySelfReferentialReference) {
+  std::string Code = R"(
+    struct target {
+      target() {
+        (void)0;
+        // [[p]]
+      }
+      target &self = *this;
+    };
+  )";
+  runDataflow(
+      Code,
+      [](const llvm::StringMap<DataflowAnalysisState<NoopLattice>> &Results,
+         ASTContext &ASTCtx) {
+        const Environment &Env = getEnvironmentAtAnnotation(Results, "p");
+        const ValueDecl *SelfDecl = findValueDecl(ASTCtx, "self");
+
+        auto *ThisLoc = Env.getThisPointeeStorageLocation();
+        ASSERT_EQ(&ThisLoc->getChild(*SelfDecl), ThisLoc);
+      });
+}
+
 TEST(TransferTest, MultipleVarsDecl) {
   std::string Code = R"(
     void target() {



Index: clang/unittests/Analysis/FlowSensitive/TransferTest.cpp
===================================================================
--- clang/unittests/Analysis/FlowSensitive/TransferTest.cpp
+++ clang/unittests/Analysis/FlowSensitive/TransferTest.cpp
@@ -656,6 +656,28 @@
       });
 }
 
+TEST(TransferTest, DirectlySelfReferentialReference) {
+  std::string Code = R"(
+    struct target {
+      target() {
+        (void)0;
+        // [[p]]
+      }
+      target &self = *this;
+    };
+  )";
+  runDataflow(
+      Code,
+      [](const llvm::StringMap<DataflowAnalysisState<NoopLattice>> &Results,
+         ASTContext &ASTCtx) {
+        const Environment &Env = getEnvironmentAtAnnotation(Results, "p");
+        const ValueDecl *SelfDecl = findValueDecl(ASTCtx, "self");
+
+        auto *ThisLoc = Env.getThisPointeeStorageLocation();
+        ASSERT_EQ(&ThisLoc->getChild(*SelfDecl), ThisLoc);
+      });
+}
+
 TEST(TransferTest, MultipleVarsDecl) {
   std::string Code = R"(
     void target() {

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