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// RUN: %clang_cc1 -fsycl-is-device -triple spir64-unknown-unknown -disable-llvm-passes -emit-llvm %s -o - | FileCheck %s
// This test code generation when sycl_external attribute is used
// Function defined and not used - symbols emitted
[[clang::sycl_external]] int square(int x) { return x*x; }
// CHECK: define dso_local spir_func noundef i32 @_Z6squarei
// Function defined and used - symbols emitted
[[clang::sycl_external]] int squareUsed(int x) { return x*x; }
// CHECK: define dso_local spir_func noundef i32 @_Z10squareUsedi
// FIXME: Constexpr function defined and not used - symbols emitted
[[clang::sycl_external]] constexpr int squareInlined(int x) { return x*x; }
// CHECK: define linkonce_odr spir_func noundef i32 @_Z13squareInlinedi
// Function declared but not defined or used - no symbols emitted
[[clang::sycl_external]] int declOnly();
// CHECK-NOT: define {{.*}} i32 @_Z8declOnlyv
// CHECK-NOT: declare {{.*}} i32 @_Z8declOnlyv
// Function declared and used in host but not defined - no symbols emitted
[[clang::sycl_external]] void declUsedInHost(int y);
// Function declared and used in device but not defined - emit external reference
[[clang::sycl_external]] void declUsedInDevice(int y);
// CHECK: define dso_local spir_func void @_Z9deviceUsev
[[clang::sycl_external]] void deviceUse() { declUsedInDevice(3); }
// CHECK: declare spir_func void @_Z16declUsedInDevicei
// Function declared with the attribute and later defined - definition emitted
[[clang::sycl_external]] int func1(int arg);
int func1(int arg) { return arg; }
// CHECK: define dso_local spir_func noundef i32 @_Z5func1i
class A {
// Unused defaulted special member functions - no symbols emitted
[[clang::sycl_external]] A& operator=(A& a) = default;
};
class B {
[[clang::sycl_external]] virtual void BFunc1WithAttr() { int i = 1; }
// CHECK: define linkonce_odr spir_func void @_ZN1B14BFunc1WithAttrEv
virtual void BFunc2NoAttr() { int i = 2; }
};
class C {
// Special member function defined - definition emitted
[[clang::sycl_external]] ~C() {}
// CHECK: define linkonce_odr spir_func void @_ZN1CD1Ev
};
// Function reachable from an unused function - definition emitted
int ret1() { return 1; }
[[clang::sycl_external]] int withAttr() { return ret1(); }
// CHECK: define dso_local spir_func noundef i32 @_Z8withAttrv
// CHECK: define dso_local spir_func noundef i32 @_Z4ret1v
template <typename T>
[[clang::sycl_external]] void tFunc1(T arg) {}
// Explicit specialization defined - symbols emitted
template<>
[[clang::sycl_external]] void tFunc1<int>(int arg) {}
// CHECK: define dso_local spir_func void @_Z6tFunc1IiEvT_
template <typename T>
[[clang::sycl_external]] void tFunc2(T arg) {}
template void tFunc2<int>(int arg);
// CHECK: define weak_odr spir_func void @_Z6tFunc2IiEvT_
template<> void tFunc2<char>(char arg) {}
// CHECK: define dso_local spir_func void @_Z6tFunc2IcEvT_
template<> [[clang::sycl_external]] void tFunc2<long>(long arg) {}
// CHECK: define dso_local spir_func void @_Z6tFunc2IlEvT_
// Functions defined without the sycl_external attribute that are used
// in host code, but not in device code are not emitted.
int squareNoAttr(int x) { return x*x; }
// CHECK-NOT: define {{.*}} i32 @_Z12squareNoAttri
int main() {
declUsedInHost(4);
int i = squareUsed(5);
int j = squareNoAttr(6);
return 0;
}
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