Generate code for the move assignment operator using memcpy, the same as we do
for the copy assignment operator.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190385 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenFunction.cpp b/lib/CodeGen/CodeGenFunction.cpp
index 20352f9..c9279a2 100644
--- a/lib/CodeGen/CodeGenFunction.cpp
+++ b/lib/CodeGen/CodeGenFunction.cpp
@@ -702,7 +702,8 @@
// clones the body of the function call operator (but is actually static).
EmitLambdaStaticInvokeFunction(cast<CXXMethodDecl>(FD));
} else if (FD->isDefaulted() && isa<CXXMethodDecl>(FD) &&
- cast<CXXMethodDecl>(FD)->isCopyAssignmentOperator()) {
+ (cast<CXXMethodDecl>(FD)->isCopyAssignmentOperator() ||
+ cast<CXXMethodDecl>(FD)->isMoveAssignmentOperator())) {
// Implicit copy-assignment gets the same special treatment as implicit
// copy-constructors.
emitImplicitAssignmentOperatorBody(Args);
diff --git a/test/CodeGenCXX/move-assignment.cpp b/test/CodeGenCXX/move-assignment.cpp
new file mode 100644
index 0000000..3653eab
--- /dev/null
+++ b/test/CodeGenCXX/move-assignment.cpp
@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 -emit-llvm -std=c++11 -o - %s -triple x86_64-pc-linux-gnu | FileCheck %s
+
+struct A {
+ A &operator=(A&&);
+};
+
+struct B {
+ A a;
+ int i;
+ bool b;
+ char c;
+ long l;
+ float f;
+};
+
+void test1() {
+ B b1, b2;
+ b1 = static_cast<B&&>(b2);
+}
+
+// CHECK-LABEL: define {{.*}} @_ZN1BaSEOS_
+// CHECK: call {{.*}} @_ZN1AaSEOS_
+// CHECK-NOT: store
+// CHECK: call {{.*}}memcpy{{.*}}, i64 24
+// CHECK-NOT: store
+// CHECK: ret