1 files changed, 118 insertions, 0 deletions
diff --git a/clang/test/CodeGenCXX/microsoft-abi-exceptions.cpp b/clang/test/CodeGenCXX/microsoft-abi-exceptions.cpp
new file mode 100644
index 00000000000..383270a1f2e
--- /dev/null
+++ b/clang/test/CodeGenCXX/microsoft-abi-exceptions.cpp
@@ -0,0 +1,118 @@
+// RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-pc-win32 -cxx-abi microsoft -fexceptions | FileCheck -check-prefix WIN32 %s
+
+struct A {
+  A();
+  ~A();
+  int a;
+};
+
+A getA();
+
+int TakesTwo(A a, A b);
+void HasEHCleanup() {
+  TakesTwo(getA(), getA());
+}
+
+// With exceptions, we need to clean up at least one of these temporaries.
+// WIN32: define void @"\01?HasEHCleanup@@YAXXZ"() {{.*}} {
+//    First one doesn't have any cleanups, no need for invoke.
+// WIN32:   call void @"\01?getA@@YA?AUA@@XZ"(%struct.A* sret %{{.*}})
+//    If this call throws, we have to cleanup the first temporary.
+// WIN32:   invoke void @"\01?getA@@YA?AUA@@XZ"(%struct.A* sret %{{.*}})
+//    If this call throws, we already popped our cleanups
+// WIN32:   call i32 @"\01?TakesTwo@@YAHUA@@0@Z"
+// WIN32:   ret void
+//
+//    There should be one dtor call for unwinding from the second getA.
+// WIN32:   invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
+// WIN32: }
+
+void TakeRef(const A &a);
+int HasDeactivatedCleanups() {
+  return TakesTwo((TakeRef(A()), A()), (TakeRef(A()), A()));
+}
+
+// WIN32: define i32 @"\01?HasDeactivatedCleanups@@YAHXZ"() {{.*}} {
+// WIN32:   %[[isactive:.*]] = alloca i1
+// WIN32:   call x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
+// WIN32:   invoke void @"\01?TakeRef@@YAXABUA@@@Z"
+// WIN32:   invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %[[arg1:.*]])
+// WIN32:   store i1 true, i1* %[[isactive]]
+// WIN32:   invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
+// WIN32:   invoke void @"\01?TakeRef@@YAXABUA@@@Z"
+// WIN32:   invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
+// WIN32:   store i1 false, i1* %[[isactive]]
+// WIN32:   invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z"
+//        Destroy the two const ref temporaries.
+// WIN32:   invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
+// WIN32:   call x86_thiscallcc void @"\01??1A@@QAE@XZ"
+// WIN32:   ret i32
+//
+//        Conditionally destroy arg1.
+// WIN32:   %[[cond:.*]] = load i1* %[[isactive]]
+// WIN32:   br i1 %[[cond]]
+// WIN32:   invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %[[arg1]])
+// WIN32: }
+
+// Test putting the cleanups inside a conditional.
+int CouldThrow();
+int HasConditionalCleanup(bool cond) {
+  return (cond ? TakesTwo(A(), A()) : CouldThrow());
+}
+
+// WIN32: define i32 @"\01?HasConditionalCleanup@@YAH_N@Z"(i1 zeroext %{{.*}}) {{.*}} {
+// WIN32:   store i1 false
+// WIN32:   br i1
+//        No cleanups, so we call and then activate a cleanup if it succeeds.
+// WIN32:   call x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %[[arg1:.*]])
+// WIN32:   store i1 true
+//        Now we have a cleanup for the first aggregate, so we invoke.
+// WIN32:   invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %{{.*}})
+//        Now we have no cleanups because TakeTwo will destruct both args.
+// WIN32:   call i32 @"\01?TakesTwo@@YAHUA@@0@Z"
+//        Still no cleanups, so call.
+// WIN32:   call i32 @"\01?CouldThrow@@YAHXZ"()
+//        Somewhere in the landing pad for our single invoke, call the dtor.
+// WIN32:   invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %[[arg1]])
+// WIN32: }
+
+// Now test both.
+int HasConditionalDeactivatedCleanups(bool cond) {
+  return (cond ? TakesTwo((TakeRef(A()), A()), (TakeRef(A()), A())) : CouldThrow());
+}
+
+// WIN32: define i32 @"\01?HasConditionalDeactivatedCleanups@@YAH_N@Z"{{.*}} {
+// WIN32:   %[[arg1:.*]] = alloca %struct.A, align 4
+// WIN32:   alloca i1
+// WIN32:   %[[arg1_cond:.*]] = alloca i1
+//        Start all four cleanups as deactivated.
+// WIN32:   store i1 false
+// WIN32:   store i1 false
+// WIN32:   store i1 false
+// WIN32:   store i1 false
+// WIN32:   br i1
+//        True condition.
+// WIN32:   call x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
+// WIN32:   store i1 true
+// WIN32:   invoke void @"\01?TakeRef@@YAXABUA@@@Z"
+// WIN32:   invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %[[arg1]])
+// WIN32:   store i1 true, i1* %[[arg1_cond]]
+// WIN32:   invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
+// WIN32:   store i1 true
+// WIN32:   invoke void @"\01?TakeRef@@YAXABUA@@@Z"
+// WIN32:   invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
+// WIN32:   store i1 true
+// WIN32:   store i1 false, i1* %[[arg1_cond]]
+// WIN32:   invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z"
+//        False condition.
+// WIN32:   invoke i32 @"\01?CouldThrow@@YAHXZ"()
+//        Two normal cleanups for TakeRef args.
+// WIN32:   invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
+// WIN32:   call x86_thiscallcc void @"\01??1A@@QAE@XZ"
+// WIN32:   ret i32
+//
+//        Somewhere in the landing pad soup, we conditionally destroy arg1.
+// WIN32:   %[[isactive:.*]] = load i1* %[[arg1_cond]]
+// WIN32:   br i1 %[[isactive]]
+// WIN32:   invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %[[arg1]])
+// WIN32: }