Mangler: Sketch mangling for TemplateArgument::Declaration kind.

 - Several important FIXMEs related to whether arguments are expressions or external names, and the mangling of extern "C" names (c.f., PR5522).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89556 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 68 insertions, 0 deletions

diff --git a/test/CodeGenCXX/mangle-template.cpp b/test/CodeGenCXX/mangle-template.cpp
new file mode 100644
index 0000000000..32ce33da95
--- /dev/null
+++ b/test/CodeGenCXX/mangle-template.cpp
@@ -0,0 +1,68 @@
+// RUN: clang-cc -emit-llvm -o - %s | FileCheck %s
+
+namespace test1 {
+int x;
+template <int& D> class T { };
+// CHECK: void @_ZN5test12f0ENS_1TILZNS_1xEEEE(
+void f0(T<x> a0) {}
+}
+
+namespace test1 {
+// CHECK: void @_ZN5test12f0Ef
+void f0(float) {}
+template<void (&)(float)> struct t1 {};
+// CHECK: void @_ZN5test12f1ENS_2t1ILZNS_2f0EfEEE(
+void f1(t1<f0> a0) {}
+}
+
+namespace test2 {
+// CHECK: void @_ZN5test22f0Ef
+void f0(float) {}
+template<void (*)(float)> struct t1 {};
+// FIXME: Fails because we don't treat as an expression.
+// CHECK-FIXME: void @_ZN5test22f1ENS_2t1IXadL_ZNS_2f0EfEEEE(
+void f1(t1<f0> a0) {}
+}
+
+namespace test3 {
+// CHECK: void @test3_f0
+extern "C" void test3_f0(float) {}
+template<void (&)(float)> struct t1 {};
+// FIXME: Fails because we tack on a namespace.
+// CHECK-FIXME: void @_ZN5test32f1ENS_2t1ILZ8test3_f0EEE(
+void f1(t1<test3_f0> a0) {}
+}
+
+namespace test4 {
+// CHECK: void @test4_f0
+extern "C" void test4_f0(float) {}
+template<void (*)(float)> struct t1 {};
+// FIXME: Fails because we don't treat as an expression.
+// CHECK-FIXME: void @_ZN5test42f1ENS_2t1IXadL_Z8test4_f0EEEE(
+void f1(t1<test4_f0> a0) {}
+}
+
+// CHECK: void @test5_f0
+extern "C" void test5_f0(float) {}
+int main(int) {}
+
+namespace test5 {
+template<void (&)(float)> struct t1 {};
+// CHECK: void @_ZN5test52f1ENS_2t1ILZ8test5_f0EEE(
+void f1(t1<test5_f0> a0) {}
+
+template<int (&)(int)> struct t2 {};
+// CHECK: void @_ZN5test52f2ENS_2t2ILZ4mainEEE
+void f2(t2<main> a0) {}
+}
+
+// FIXME: This fails.
+namespace test6 {
+struct A { void im0(float); };
+// CHECK: void @_ZN5test61A3im0Ef
+void A::im0(float) {}
+template <void(A::*)(float)> class T { };
+// FIXME: Fails because we don't treat as an expression.
+// CHECK-FAIL: void @_ZN5test62f0ENS_1TIXadL_ZNS_1A3im0EfEEEE(
+void f0(T<&A::im0> a0) {}
+}