1 // RUN: %clang_cc1 %s -triple %itanium_abi_triple -std=c++11 -emit-llvm -o - | FileCheck %s
2 
3 // Test optnone on template instantiations.
4 
5 //-- Effect of optnone on generic add template function.
6 
7 template <typename T> T template_normal(T a)
8 {
9   return a + a;
10 }
11 
12 template <typename T> __attribute__((optnone)) T template_optnone(T a)
13 {
14   return a + a + a;
15 }
16 
17 // This function should cause instantiations of each template, one marked
18 // with the 'optnone' attribute.
19 int container(int i)
20 {
21   return template_normal<int>(i) + template_optnone<int>(i);
22 }
23 
24 // CHECK: @_Z15template_normalIiET_S0_({{.*}}) [[NORMAL:#[0-9]+]]
25 // CHECK: @_Z16template_optnoneIiET_S0_({{.*}}) [[OPTNONE:#[0-9]+]]
26 
27 
28 //-- Effect of optnone on a partial specialization.
29 //   FIRST TEST: a method becomes marked with optnone in the specialization.
30 
31 template <typename T, typename U> class template_normal_base {
32 public:
33   T method(T t, U u)
34   {
35     return t + static_cast<T>(u);
36   }
37 };
38 
39 template <typename U> class template_normal_base<int, U>
40 {
41 public:
42   __attribute__((optnone)) int method (int t, U u)
43   {
44     return t - static_cast<int>(u);
45   }
46 };
47 
48 // This function should cause an instantiation of the full template (whose
49 // method is not marked optnone) and an instantiation of the partially
50 // specialized template (whose method is marked optnone).
51 void container2()
52 {
53   int y = 2;
54   float z = 3.0;
55   template_normal_base<float, int> class_normal;
56   template_normal_base<int, float> class_optnone;
57   float r1 = class_normal.method(z, y);
58   float r2 = class_optnone.method(y, z);
59 }
60 
61 // CHECK: @_ZN20template_normal_baseIfiE6methodEfi({{.*}}) [[NORMAL]]
62 // CHECK: @_ZN20template_normal_baseIifE6methodEif({{.*}}) [[OPTNONE]]
63 
64 
65 //-- Effect of optnone on a partial specialization.
66 //   SECOND TEST: a method loses optnone in the specialization.
67 
68 template <typename T, typename U> class template_optnone_base {
69 public:
70   __attribute__((optnone)) T method(T t, U u)
71   {
72     return t + static_cast<T>(u);
73   }
74 };
75 
76 template <typename U> class template_optnone_base<int, U>
77 {
78 public:
79   int method (int t, U u)
80   {
81     return t - static_cast<int>(u);
82   }
83 };
84 
85 // This function should cause an instantiation of the full template (whose
86 // method is marked optnone) and an instantiation of the partially
87 // specialized template (whose method is not marked optnone).
88 void container3()
89 {
90   int y = 2;
91   float z = 3.0;
92   template_optnone_base<float, int> class_optnone;
93   template_optnone_base<int, float> class_normal;
94   float r1 = class_optnone.method(z, y);
95   float r2 = class_normal.method(y, z);
96 }
97 
98 // CHECK: @_ZN21template_optnone_baseIfiE6methodEfi({{.*}}) [[OPTNONE]]
99 // CHECK: @_ZN21template_optnone_baseIifE6methodEif({{.*}}) [[NORMAL]]
100 
101 
102 // CHECK: attributes [[NORMAL]] =
103 // CHECK-NOT: optnone
104 // CHECK: attributes [[OPTNONE]] = {{.*}} optnone
105