Vendor import of clang trunk r256945:

https://llvm.org/svn/llvm-project/cfe/trunk@256945

1 files changed, 104 insertions, 0 deletions

diff --git a/test/CodeGenCXX/optnone-templates.cpp b/test/CodeGenCXX/optnone-templates.cpp
new file mode 100644
index 0000000..45a72b3
--- /dev/null
+++ b/test/CodeGenCXX/optnone-templates.cpp
@@ -0,0 +1,104 @@
+// RUN: %clang_cc1 %s -triple %itanium_abi_triple -std=c++11 -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-SAME-NOT: optnone
+// CHECK: attributes [[OPTNONE]] = {{.*}} optnone