clang/test/PCH/delayed-pch-instantiate.cpp

   1 // Test this without pch.
   2 // RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -DBODY %s -o - | FileCheck %s
   3
   4 // Test with pch.
   5 // RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-pch -o %t %s
   6 // RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -include-pch %t -DBODY %s -o - | FileCheck %s
   7
   8 // RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-pch -fpch-instantiate-templates -o %t %s
   9 // RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -include-pch %t -DBODY %s -o - | FileCheck %s
  10
  11 // expected-no-diagnostics
  12
  13 #ifndef HEADER_H
  14 #define HEADER_H
  15 struct A {
  16   void foo() { bar<0>(); } // This will trigger implicit instantiation of bar<0>() in the PCH.
  17   template <int N>
  18   void bar();
  19 };
  20 #endif
  21
  22 #ifdef BODY
  23 // But the definition is only in the source, so the instantiation must be delayed until the TU.
  24 template <int N>
  25 void A::bar() {}
  26
  27 void test(A *a) { a->foo(); }
  28 #endif
  29
  30 // CHECK: define linkonce_odr void @_ZN1A3barILi0EEEvv