[EH] Fix for clang bug 24005 - no cleanup for array of memcpy-able objects in struct (patch by Denis Zobnin)

The fix is to emit cleanup for arrays of memcpy-able objects in struct if an exception is thrown later during copy-construction.
Differential Revision: http://reviews.llvm.org/D10989

llvm-svn: 241670

1 files changed, 37 insertions, 0 deletions

diff --git a/clang/test/CodeGenCXX/eh-aggregate-copy-destroy.cpp b/clang/test/CodeGenCXX/eh-aggregate-copy-destroy.cpp
new file mode 100644
index 00000000000..29fb5567fb1
--- /dev/null
+++ b/clang/test/CodeGenCXX/eh-aggregate-copy-destroy.cpp
@@ -0,0 +1,37 @@
+// Check that in case of copying an array of memcpy-able objects, their
+// destructors will be called if an exception is thrown.
+//
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fexceptions -fcxx-exceptions -O0 -fno-elide-constructors -emit-llvm %s -o - | FileCheck %s
+
+struct ImplicitCopy {
+  int x;
+  ImplicitCopy() { x = 10; }
+  ~ImplicitCopy() { x = 20; }
+};
+
+struct ThrowCopy {
+  ThrowCopy() {}
+  ThrowCopy(const ThrowCopy &) { throw 1; }
+};
+
+struct Container {
+  ImplicitCopy b[2];
+  ThrowCopy c;
+};
+
+int main () {
+  try {
+    Container c1;
+    // CHECK_LABEL: main
+    // CHECK-NOT: call void @_ZN9ThrowCopyC1ERKS_
+    // CHECK: invoke void @_ZN9ThrowCopyC1ERKS_
+    // CHECK: invoke void @_ZN12ImplicitCopyD1Ev
+    Container c2(c1);
+  }
+  catch (...) {
+    return 1;
+  }
+
+  return 0;
+}
+