clang/test/InterfaceStubs/function-template-specialization.cpp

   1 // REQUIRES: x86-registered-target
   2
   3 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -o - -emit-interface-stubs %s | FileCheck %s
   4
   5 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -o - -emit-interface-stubs \
   6 // RUN: -DUSE_TEMPLATE_FUNCTION=1 %s | \
   7 // RUN: FileCheck -check-prefix=CHECK-USES-TEMPLATE-FUNCTION %s
   8
   9 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -o - -emit-interface-stubs \
  10 // RUN: -DSPECIALIZE_TEMPLATE_FUNCTION=1 %s | \
  11 // RUN: FileCheck -check-prefix=CHECK-SPECIALIZES-TEMPLATE-FUNCTION %s
  12
  13 // RUN: %clang -target x86_64-unknown-linux-gnu -o - -c %s | llvm-nm - 2>&1 | count 0
  14
  15 // RUN: %clang -target x86_64-unknown-linux-gnu -o - -c \
  16 // RUN: -DUSE_TEMPLATE_FUNCTION=1 %s | llvm-nm - 2>&1 | \
  17 // RUN: FileCheck -check-prefix=CHECK-USES-TEMPLATE-FUNCTION %s
  18
  19 // RUN: %clang -target x86_64-unknown-linux-gnu -o - -c \
  20 // RUN: -DSPECIALIZE_TEMPLATE_FUNCTION=1 %s | llvm-nm - 2>&1 | \
  21 // RUN: FileCheck -check-prefix=CHECK-SPECIALIZES-TEMPLATE-FUNCTION %s
  22
  23 // CHECK-NOT: _Z16templateFunctionIiET_S0_
  24 // CHECK-USES-TEMPLATE-FUNCTION-DAG: _Z16templateFunctionIiET_S0_
  25 // CHECK-SPECIALIZES-TEMPLATE-FUNCTION-DAG: _Z16templateFunctionIiET_S0_
  26 template <typename T>
  27 T templateFunction(T t) { return t; }
  28
  29 #ifdef USE_TEMPLATE_FUNCTION
  30 int FortyTwo = templateFunction<int>(42);
  31 #endif
  32
  33 #ifdef SPECIALIZE_TEMPLATE_FUNCTION
  34 template <>
  35 int templateFunction<int>(int t);
  36 // TODO: Make it so that -emit-interface-stubs does not emit
  37 // _Z16templateFunctionIiET_S0_ if there is no user of the specialization.
  38 int foo() { return templateFunction(42); }
  39 #endif