Index: lib/CodeGen/CGBlocks.cpp =================================================================== --- lib/CodeGen/CGBlocks.cpp +++ lib/CodeGen/CGBlocks.cpp @@ -1450,9 +1450,9 @@ llvm::BasicBlock::iterator entry_ptr = Builder.GetInsertPoint(); --entry_ptr; - if (IsLambdaConversionToBlock) + if (IsLambdaConversionToBlock) { EmitLambdaBlockInvokeBody(); - else { + } else { PGO.assignRegionCounters(GlobalDecl(blockDecl), fn); incrementProfileCounter(blockDecl->getBody()); EmitStmt(blockDecl->getBody()); Index: lib/CodeGen/CGClass.cpp =================================================================== --- lib/CodeGen/CGClass.cpp +++ lib/CodeGen/CGClass.cpp @@ -2776,9 +2776,12 @@ RValue RV = EmitCall(calleeFnInfo, callee, returnSlot, callArgs); // If necessary, copy the returned value into the slot. - if (!resultType->isVoidType() && returnSlot.isNull()) + if (!resultType->isVoidType() && returnSlot.isNull()) { + if (getLangOpts().ObjCAutoRefCount && resultType->isObjCRetainableType()) { + RV = RValue::get(EmitARCRetainAutoreleasedReturnValue(RV.getScalarVal())); + } EmitReturnOfRValue(RV, resultType); - else + } else EmitBranchThroughCleanup(ReturnBlock); } Index: test/CodeGenObjCXX/arc-forwarded-lambda-call.mm =================================================================== --- /dev/null +++ test/CodeGenObjCXX/arc-forwarded-lambda-call.mm @@ -0,0 +1,21 @@ +// RUN: %clang_cc1 -triple x86_64-apple-macosx10.12.0 -emit-llvm -fblocks -fobjc-arc -fobjc-runtime-has-weak -std=c++11 -O2 -o - %s | FileCheck %s + +void test0(id x) { + extern void test0_helper(id (^)(void)); + test0_helper([=]() { return x; }); + // CHECK-LABEL: define internal i8* @___Z5test0P11objc_object_block_invoke + // CHECK: {{%.*}} = tail call i8* @objc_retain(i8* [[T0:%.*]]) + // CHECK-NEXT: {{%.*}} = tail call i8* @objc_autoreleaseReturnValue(i8* [[T0]]) + // CHECK-NEXT: ret i8* [[T0]] +} + +id test1_rv; + +void test1() { + extern void test1_helper(id (*)(void)); + test1_helper([](){ return test1_rv; }); + // CHECK-LABEL: define internal i8* @"_ZZ5test1vEN3$_18__invokeEv" + // CHECK: {{%.*}} = tail call i8* @objc_retain(i8* [[T0:%.*]]) + // CHECK-NEXT: {{%.*}} = tail call i8* @objc_autoreleaseReturnValue(i8* [[T0]]) + // CHECK-NEXT: ret i8* [[T0]] +}