From: Fariborz Jahanian <fjahanian@apple.com>
Date: Fri, 26 Oct 2012 20:22:11 +0000 (+0000)
Subject: objective-C IRGen: for @implementation nested in
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=c1868e533e63a1b7dad7a22714fc593c045382ae;p=clang

objective-C IRGen: for @implementation nested in
extern "C", its method definitions must be IRGen'ed
before meta-data for class is generated. Otherwise,
IRGen crashes (to say the least).
// rdar://12581683


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166809 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index 5425eaf64e..65ba91a638 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -2582,8 +2582,15 @@ void CodeGenModule::EmitLinkageSpec(const LinkageSpecDecl *LSD) {
   }
 
   for (RecordDecl::decl_iterator I = LSD->decls_begin(), E = LSD->decls_end();
-       I != E; ++I)
+       I != E; ++I) {
+    if (ObjCImplDecl *OID = dyn_cast<ObjCImplDecl>(*I)) {
+      for (ObjCContainerDecl::method_iterator M = OID->meth_begin(),
+           MEnd = OID->meth_end();
+           M != MEnd; ++M)
+        EmitTopLevelDecl(*M);
+    }
     EmitTopLevelDecl(*I);
+  }
 }
 
 /// EmitTopLevelDecl - Emit code for a single top level declaration.
diff --git a/test/CodeGenObjCXX/implementation-in-extern-c.mm b/test/CodeGenObjCXX/implementation-in-extern-c.mm
new file mode 100644
index 0000000000..4c1ee256f4
--- /dev/null
+++ b/test/CodeGenObjCXX/implementation-in-extern-c.mm
@@ -0,0 +1,17 @@
+// RUN: %clang_cc1 -emit-llvm %s -o /dev/null
+// rdar://12581683
+
+extern "C" {
+@interface RetainBucket 
++ (id) sharedRetainBucket;
+@end
+
+@implementation RetainBucket
++ (id) sharedRetainBucket
+{
+    static id sharedBucket = (id)0;
+    return sharedBucket;
+}
+@end
+}
+