clang/test/CodeGenCXX/constexpr-late-instantiation.cpp

   1 // Make sure foo is instantiated and we don't get a link error
   2 // RUN: %clang_cc1 -emit-llvm -triple %itanium_abi_triple %s -o- | FileCheck %s
   3
   4 template <typename T>
   5 constexpr T foo(T a);
   6
   7 // CHECK-LABEL: define {{.*}} @main
   8 int main() {
   9   // CHECK: call {{.*}} @_Z3fooIiET_S0_
  10   int k = foo<int>(5);
  11 }
  12 // CHECK: }
  13
  14 template <typename T>
  15 constexpr T foo(T a) {
  16   return a;
  17 }