llvm-project/clang/test/CodeGenCXX/derived-cast.cpp

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// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm %s -o - | FileCheck %s
class A {
int a;
};
class B {
int b;
public:
A *getAsA();
};
class X : public A, public B {
int x;
};
// PR35909 - https://bugs.llvm.org/show_bug.cgi?id=35909
A *B::getAsA() {
return static_cast<X*>(this);
// CHECK-LABEL: define %class.A* @_ZN1B6getAsAEv
// CHECK: %[[THIS:.*]] = load %class.B*, %class.B**
// CHECK-NEXT: %[[BC:.*]] = bitcast %class.B* %[[THIS]] to i8*
// CHECK-NEXT: getelementptr inbounds i8, i8* %[[BC]], i64 -4
}