26 lines
656 B
C++
26 lines
656 B
C++
// RUN: %clang_cc1 -emit-llvm %s -verify -fno-rtti -o - | FileCheck %s
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// expected-no-diagnostics
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struct A {
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virtual ~A(){};
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};
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struct B : public A {
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B() : A() {}
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};
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// An upcast can be resolved statically and can be used with -fno-rtti, iff it
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// does not use runtime support.
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A *upcast(B *b) {
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return dynamic_cast<A *>(b);
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// CHECK-LABEL: define %struct.A* @_Z6upcastP1B
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// CHECK-NOT: call i8* @__dynamic_cast
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}
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// A NoOp dynamic_cast can be used with -fno-rtti iff it does not use
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// runtime support.
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B *samecast(B *b) {
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return dynamic_cast<B *>(b);
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// CHECK-LABEL: define %struct.B* @_Z8samecastP1B
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// CHECK-NOT: call i8* @__dynamic_cast
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}
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