clang/test/CodeGenCXX/virtual-function-calls.cpp

   1 // RUN: %clang_cc1 %s -triple %itanium_abi_triple -std=c++11 -emit-llvm -o - | FileCheck %s
   2 // RUN: %clang_cc1 %s -triple %itanium_abi_triple -std=c++11 -emit-llvm -o - -fstrict-vtable-pointers -O1 | FileCheck --check-prefix=CHECK-INVARIANT %s
   3
   4 // PR5021
   5 namespace PR5021 {
   6
   7 struct A {
   8   virtual void f(char);
   9 };
  10
  11 void f(A *a) {
  12   // CHECK: call {{.*}}void %
  13   a->f('c');
  14 }
  15
  16 struct B : virtual A {
  17   virtual void f();
  18 };
  19
  20 void f(B * b) {
  21   b->f();
  22 }
  23
  24 }
  25
  26 namespace Test1 {
  27   struct A {
  28     virtual ~A();
  29   };
  30
  31   struct B : A {
  32     virtual ~B();
  33     virtual void f();
  34   };
  35
  36   void f(B *b) {
  37     b->f();
  38   }
  39 }
  40
  41 namespace VirtualNoreturn {
  42   struct A {
  43     [[noreturn]] virtual void f();
  44   };
  45
  46   // CHECK-LABEL: @_ZN15VirtualNoreturn1f
  47   // CHECK-INVARIANT-LABEL: define {{(dso_local )?}}void @_ZN15VirtualNoreturn1f
  48   void f(A *p) {
  49     p->f();
  50     // CHECK: call {{.*}}void %{{[^#]*$}}
  51     // CHECK-NOT: unreachable
  52     // CHECK-INVARIANT: load {{.*}} !invariant.load ![[EMPTY_NODE:[0-9]+]]
  53   }
  54 }
  55
  56 // CHECK-INVARIANT: ![[EMPTY_NODE]] = !{}