[arcmt] In GC, transform NSMakeCollectable to CFBridgingRelease.

llvm-svn: 143698

1 files changed, 59 insertions, 0 deletions

diff --git a/clang/lib/ARCMigrate/TransGCCalls.cpp b/clang/lib/ARCMigrate/TransGCCalls.cpp
new file mode 100644
index 00000000000..71dc6dc357d
--- /dev/null
+++ b/clang/lib/ARCMigrate/TransGCCalls.cpp
@@ -0,0 +1,59 @@
+//===--- TransGCCalls.cpp - Tranformations to ARC mode --------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Transforms.h"
+#include "Internals.h"
+#include "clang/Sema/SemaDiagnostic.h"
+
+using namespace clang;
+using namespace arcmt;
+using namespace trans;
+
+namespace {
+
+class GCCollectableCallsChecker :
+                         public RecursiveASTVisitor<GCCollectableCallsChecker> {
+  MigrationContext &MigrateCtx;
+  ParentMap &PMap;
+  IdentifierInfo *NSMakeCollectableII;
+
+public:
+  GCCollectableCallsChecker(MigrationContext &ctx, ParentMap &map)
+    : MigrateCtx(ctx), PMap(map) {
+    NSMakeCollectableII =
+        &MigrateCtx.getPass().Ctx.Idents.get("NSMakeCollectable");
+  }
+
+  bool VisitCallExpr(CallExpr *E) {
+    Expr *CEE = E->getCallee()->IgnoreParenImpCasts();
+    if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE)) {
+      if (FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(DRE->getDecl())) {
+        if (FD->getDeclContext()->getRedeclContext()->isFileContext() &&
+            FD->getIdentifier() == NSMakeCollectableII) {
+          TransformActions &TA = MigrateCtx.getPass().TA;
+          Transaction Trans(TA);
+          TA.clearDiagnostic(diag::err_unavailable,
+                             diag::err_unavailable_message,
+                             DRE->getSourceRange());
+          TA.replace(DRE->getSourceRange(), "CFBridgingRelease");
+        }
+      }
+    }
+
+    return true;
+  }
+};
+
+} // anonymous namespace
+
+void GCCollectableCallsTraverser::traverseBody(BodyContext &BodyCtx) {
+  GCCollectableCallsChecker(BodyCtx.getMigrationContext(),
+                            BodyCtx.getParentMap())
+                                            .TraverseStmt(BodyCtx.getTopStmt());
+}