clang/test/CodeGenCXX/derived-cast.cpp

   1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm %s -o - | FileCheck %s
   2
   3 class A {
   4     int a;
   5 };
   6
   7 class B {
   8     int b;
   9 public:
  10     A *getAsA();
  11 };
  12
  13 class X : public A, public B {
  14     int x;
  15 };
  16
  17 // PR35909 - https://bugs.llvm.org/show_bug.cgi?id=35909
  18
  19 A *B::getAsA() {
  20   return static_cast<X*>(this);
  21
  22   // CHECK-LABEL: define{{.*}} ptr @_ZN1B6getAsAEv
  23   // CHECK: %[[THIS:.*]] = load ptr, ptr
  24   // CHECK-NEXT: getelementptr inbounds i8, ptr %[[THIS]], i64 -4
  25 }
  26