CodeGenCXX: Test that linetables work with variadic virtual thunks

Add a frontend test for PR22929, which was fixed by LLVM r232449.
Besides the crash test, check that the `!dbg` attachment is sane since
its presence was the trigger.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@232450 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGenCXX/linetable-virtual-variadic.cpp b/test/CodeGenCXX/linetable-virtual-variadic.cpp
new file mode 100644 (file)
index 0000000..0838dd5
--- /dev/null
+++ b/test/CodeGenCXX/linetable-virtual-variadic.cpp
@@ -0,0 +1,23 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -gline-tables-only %s -o - | FileCheck %s
+// Crasher for PR22929.
+class Base {
+  virtual void VariadicFunction(...);
+};
+
+class Derived : public virtual Base {
+  virtual void VariadicFunction(...);
+};
+
+void Derived::VariadicFunction(...) { }
+
+// CHECK-LABEL: define void @_ZN7Derived16VariadicFunctionEz(
+// CHECK: ret void, !dbg ![[LOC:[0-9]+]]
+// CHECK-LABEL: define void @_ZT{{.+}}N7Derived16VariadicFunctionEz(
+// CHECK: ret void, !dbg ![[LOC:[0-9]+]]
+//
+// CHECK: !llvm.dbg.cu = !{![[CU:[0-9]+]]}
+//
+// CHECK: ![[CU]] = !MDCompileUnit({{.*}} subprograms: ![[SPs:[0-9]+]]
+// CHECK: ![[SPs]] = !{![[SP:[0-9]+]]}
+// CHECK: ![[SP]] = !MDSubprogram(name: "VariadicFunction",{{.*}} function: {{[^:]+}} @_ZN7Derived16VariadicFunctionEz
+// CHECK: ![[LOC]] = !MDLocation({{.*}}scope: ![[SP]])