1 files changed, 45 insertions, 0 deletions
diff --git a/test/CodeGenCXX/cxx1z-fold-expression.cpp b/test/CodeGenCXX/cxx1z-fold-expression.cpp
new file mode 100644
index 0000000..5dac66b
--- /dev/null
+++ b/test/CodeGenCXX/cxx1z-fold-expression.cpp
@@ -0,0 +1,45 @@
+// RUN: %clang_cc1 -std=c++1z -triple %itanium_abi_triple -emit-llvm -o - %s | FileCheck %s
+
+template<int> struct A {};
+template<int ...N> void foldr(A<(N + ...)>);
+template<int ...N> void foldl(A<(... + N)>);
+template<int ...N> void foldr1(A<(N + ... + 1)>);
+template<int ...N> void foldl1(A<(1 + ... + N)>);
+void use() {
+  foldr<1, 2, 3>({});
+  foldl<1, 2, 3>({});
+  foldr1<1, 2, 3>({});
+  foldl1<1, 2, 3>({});
+  // CHECK-DAG: @_Z5foldrIJLi1ELi2ELi3EEEv1AIXfrplT_EE(
+  // CHECK-DAG: @_Z5foldlIJLi1ELi2ELi3EEEv1AIXflplT_EE(
+  // CHECK-DAG: @_Z6foldr1IJLi1ELi2ELi3EEEv1AIXfRplT_Li1EEE(
+  // CHECK-DAG: @_Z6foldl1IJLi1ELi2ELi3EEEv1AIXfLplLi1ET_EE(
+}
+
+template<int ...N> using Foldr = A<(N + ...)>;
+template<int ...N> using Foldl = A<(... + N)>;
+template<int ...N> using Foldr1 = A<(N + ... + 1)>;
+template<int ...N> using Foldl1 = A<(1 + ... + N)>;
+
+template<int ...A> struct Partial {
+  template<int ...B> void foldr(Foldr<A..., B..., A..., B...>);
+  template<int ...B> void foldl(Foldl<A..., B..., A..., B...>);
+  template<int ...B> void foldr1(Foldr1<A..., B..., A..., B...>);
+  template<int ...B> void foldl1(Foldl1<A..., B..., A..., B...>);
+};
+void use(Partial<1, 2> p) {
+  p.foldr<3, 4>({});
+  p.foldl<3, 4>({});
+  p.foldr1<3, 4>({});
+  p.foldl1<3, 4>({});
+  // CHECK-DAG: @_ZN7PartialIJLi1ELi2EEE5foldrIJLi3ELi4EEEEv1AIXplLi1EplLi2EfRplT_plLi1EplLi2EfrplT_EE(
+  // CHECK-DAG: @_ZN7PartialIJLi1ELi2EEE5foldlIJLi3ELi4EEEEv1AIXfLplplplfLplplLi1ELi2ET_Li1ELi2ET_EE
+  // CHECK-DAG: @_ZN7PartialIJLi1ELi2EEE6foldr1IJLi3ELi4EEEEv1AIXplLi1EplLi2EfRplT_plLi1EplLi2EfRplT_Li1EEE(
+  // CHECK-DAG: @_ZN7PartialIJLi1ELi2EEE6foldl1IJLi3ELi4EEEEv1AIXfLplplplfLplplplLi1ELi1ELi2ET_Li1ELi2ET_EE(
+}
+
+extern int n;
+template<int ...N> void f() {
+  (n = ... = N);
+}
+template void f<>();