[PATCH] D50932: [ASTImporter] Add test for C++ casts and fix broken const_cast importing.

[Raphael Isemann via Phabricator via cfe-commits]

teemperor updated this revision to Diff 161496.
teemperor added a comment.

- Added comment why we enable RTTI.


https://reviews.llvm.org/D50932

Files:
  lib/AST/ASTImporter.cpp
  test/Import/cxx-casts/Inputs/F.cpp
  test/Import/cxx-casts/test.cpp
  tools/clang-import-test/clang-import-test.cpp


Index: tools/clang-import-test/clang-import-test.cpp
===================================================================
--- tools/clang-import-test/clang-import-test.cpp
+++ tools/clang-import-test/clang-import-test.cpp
@@ -194,6 +194,8 @@
   Inv->getLangOpts()->ThreadsafeStatics = false;
   Inv->getLangOpts()->AccessControl = false;
   Inv->getLangOpts()->DollarIdents = true;
+  // Needed for testing dynamic_cast.
+  Inv->getLangOpts()->RTTI = true;
   Inv->getCodeGenOpts().setDebugInfo(codegenoptions::FullDebugInfo);
   Inv->getTargetOpts().Triple = llvm::sys::getDefaultTargetTriple();
 
Index: test/Import/cxx-casts/test.cpp
===================================================================
--- /dev/null
+++ test/Import/cxx-casts/test.cpp
@@ -0,0 +1,21 @@
+// RUN: clang-import-test -dump-ast -import %S/Inputs/F.cpp -expression %s | FileCheck %s
+
+// CHECK: CXXDynamicCastExpr
+// CHECK-SAME: dynamic_cast
+// CHECK-SAME: <Dynamic>
+
+// CHECK: CXXStaticCastExpr
+// CHECK-SAME: static_cast
+// CHECK-SAME: <BaseToDerived (A)>
+
+// CHECK: CXXReinterpretCastExpr
+// CHECK-SAME: reinterpret_cast
+// CHECK-SAME: <BitCast>
+
+// CHECK: CXXConstCastExpr
+// CHECK-SAME: const_cast
+// CHECK-SAME: <NoOp>
+
+void expr() {
+  f();
+}
Index: test/Import/cxx-casts/Inputs/F.cpp
===================================================================
--- /dev/null
+++ test/Import/cxx-casts/Inputs/F.cpp
@@ -0,0 +1,12 @@
+struct A {
+  virtual ~A() {}
+};
+struct B : public A {};
+
+void f() {
+  const A *b = new B();
+  const B *c1 = dynamic_cast<const B *>(b);
+  const B *c2 = static_cast<const B *>(b);
+  const B *c3 = reinterpret_cast<const B *>(b);
+  A *c4 = const_cast<A *>(b);
+}
Index: lib/AST/ASTImporter.cpp
===================================================================
--- lib/AST/ASTImporter.cpp
+++ lib/AST/ASTImporter.cpp
@@ -6897,6 +6897,10 @@
     return CXXReinterpretCastExpr::Create(
         Importer.getToContext(), ToType, VK, CK, ToOp, &BasePath,
         ToWritten, ToOperatorLoc, ToRParenLoc, ToAngleBrackets);
+  } else if (isa<CXXConstCastExpr>(E)) {
+    return CXXConstCastExpr::Create(Importer.getToContext(), ToType, VK, ToOp,
+                                    ToWritten, ToOperatorLoc, ToRParenLoc,
+                                    ToAngleBrackets);
   } else {
     return nullptr;
   }


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