derek.holloway
7502bf64a4
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33 lines
1.4 KiB
C++
33 lines
1.4 KiB
C++
/// Check that -fexperimental-omit-vtable-rtti omits the RTTI component from
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/// the vtable.
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// RUN: %clang_cc1 %s -triple=aarch64-unknown-linux-gnu -fno-rtti -fexperimental-omit-vtable-rtti -o - -emit-llvm | FileCheck -check-prefixes=POINTER,RTTI %s
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// RUN: %clang_cc1 %s -triple=aarch64-unknown-linux-gnu -fexperimental-relative-c++-abi-vtables -fno-rtti -fexperimental-omit-vtable-rtti -o - -emit-llvm | FileCheck -check-prefixes=RELATIVE,RTTI %s
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/// Normally, the vtable would contain at least three components:
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/// - An offset to top
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/// - A pointer to the RTTI struct
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/// - A virtual function
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///
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/// Now vtables should have just two components.
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// POINTER: @_ZTV1A = constant { [2 x ptr] } { [2 x ptr] [ptr null, ptr @_ZN1A3fooEv] }, align 8
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// RELATIVE: @_ZTV1A.local = internal constant { [2 x i32] } { [2 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [2 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 1) to i64)) to i32)] }, align 4
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// RELATIVE: @_ZTV1A = alias { [2 x i32] }, ptr @_ZTV1A.local
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/// None of these supplementary symbols should be emitted with -fno-rtti, but
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/// as a sanity check lets make sure they're not emitted also.
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// RTTI-NOT: @_ZTVN10__cxxabiv117__class_type_infoE
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// RTTI-NOT: @_ZTS1A
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// RTTI-NOT: @_ZTI1A
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class A {
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public:
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virtual void foo();
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};
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void A::foo() {}
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void A_foo(A *a) {
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a->foo();
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}
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