optnone-templates.cpp
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// RUN: %clang_cc1 %s -triple %itanium_abi_triple -std=c++11 -disable-O0-optnone -emit-llvm -o - | FileCheck %s
// Test optnone on template instantiations.
//-- Effect of optnone on generic add template function.
template <typename T> T template_normal(T a)
{
return a + a;
}
template <typename T> __attribute__((optnone)) T template_optnone(T a)
{
return a + a + a;
}
// This function should cause instantiations of each template, one marked
// with the 'optnone' attribute.
int container(int i)
{
return template_normal<int>(i) + template_optnone<int>(i);
}
// CHECK: @_Z15template_normalIiET_S0_({{.*}}) [[NORMAL:#[0-9]+]]
// CHECK: @_Z16template_optnoneIiET_S0_({{.*}}) [[OPTNONE:#[0-9]+]]
//-- Effect of optnone on a partial specialization.
// FIRST TEST: a method becomes marked with optnone in the specialization.
template <typename T, typename U> class template_normal_base {
public:
T method(T t, U u)
{
return t + static_cast<T>(u);
}
};
template <typename U> class template_normal_base<int, U>
{
public:
__attribute__((optnone)) int method (int t, U u)
{
return t - static_cast<int>(u);
}
};
// This function should cause an instantiation of the full template (whose
// method is not marked optnone) and an instantiation of the partially
// specialized template (whose method is marked optnone).
void container2()
{
int y = 2;
float z = 3.0;
template_normal_base<float, int> class_normal;
template_normal_base<int, float> class_optnone;
float r1 = class_normal.method(z, y);
float r2 = class_optnone.method(y, z);
}
// CHECK: @_ZN20template_normal_baseIfiE6methodEfi({{.*}}) [[NORMAL]]
// CHECK: @_ZN20template_normal_baseIifE6methodEif({{.*}}) [[OPTNONE]]
//-- Effect of optnone on a partial specialization.
// SECOND TEST: a method loses optnone in the specialization.
template <typename T, typename U> class template_optnone_base {
public:
__attribute__((optnone)) T method(T t, U u)
{
return t + static_cast<T>(u);
}
};
template <typename U> class template_optnone_base<int, U>
{
public:
int method (int t, U u)
{
return t - static_cast<int>(u);
}
};
// This function should cause an instantiation of the full template (whose
// method is marked optnone) and an instantiation of the partially
// specialized template (whose method is not marked optnone).
void container3()
{
int y = 2;
float z = 3.0;
template_optnone_base<float, int> class_optnone;
template_optnone_base<int, float> class_normal;
float r1 = class_optnone.method(z, y);
float r2 = class_normal.method(y, z);
}
// CHECK: @_ZN21template_optnone_baseIfiE6methodEfi({{.*}}) [[OPTNONE]]
// CHECK: @_ZN21template_optnone_baseIifE6methodEif({{.*}}) [[NORMAL]]
// CHECK: attributes [[NORMAL]] =
// CHECK-NOT: optnone
// CHECK: attributes [[OPTNONE]] = {{.*}} optnone