When generating the call arguments in a thunk to call the thunkee, do
not make copies non-POD arguments or arguments passed by reference:
just copy the pointers directly. This eliminates another source of the
dreaded memcpy-of-non-PODs. Fixes PR7188.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@104327 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGenCXX/thunks.cpp b/test/CodeGenCXX/thunks.cpp
index 8144770..b6e18e6 100644
--- a/test/CodeGenCXX/thunks.cpp
+++ b/test/CodeGenCXX/thunks.cpp
@@ -173,6 +173,51 @@
X Thunks::f() { return X(); }
}
+namespace Test7 {
+ // PR7188
+ struct X {
+ X();
+ X(const X&);
+ X &operator=(const X&);
+ ~X();
+ };
+
+ struct Small { short s; };
+ struct Large {
+ char array[1024];
+ };
+
+ class A {
+ protected:
+ virtual void foo() = 0;
+ };
+
+ class B : public A {
+ protected:
+ virtual void bar() = 0;
+ };
+
+ class C : public A {
+ protected:
+ virtual void baz(X, X&, _Complex float, Small, Small&, Large) = 0;
+ };
+
+ class D : public B,
+ public C {
+
+ void foo() {}
+ void bar() {}
+ void baz(X, X&, _Complex float, Small, Small&, Large);
+ };
+
+ void D::baz(X, X&, _Complex float, Small, Small&, Large) { }
+
+ // CHECK: define void @_ZThn8_N5Test71D3bazENS_1XERS1_CfNS_5SmallERS4_NS_5LargeE(
+ // CHECK-NOT: memcpy
+ // CHECK: ret void
+ void testD() { D d; }
+}
+
// This is from Test5:
// CHECK: define linkonce_odr void @_ZTv0_n24_N5Test51B1fEv
// CHECK: define internal void @_ZThn8_N12_GLOBAL__N_11C1fEv(