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bb51300970
Clang uses two types to talk about a C++ class, the NonVirtualBaseLLVMType and the LLVMType. Previously, we would allow one of these to be packed and the other not. This is problematic. If both don't agree on a common subset of fields, then routines like getLLVMFieldNo will point to the wrong field. Solve this by copying the 'packed'-ness of the complete type to the non-virtual subobject. For this to work, we need to take into account the non-virtual subobject's size and alignment when we are computing the layout of the complete object. This fixes PR21089. llvm-svn: 218577
33 lines
819 B
C++
33 lines
819 B
C++
// RUN: %clang_cc1 -triple i686-linux-gnu %s -emit-llvm -o - | FileCheck %s
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class A {
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// append has to have the same prototype as fn1 to tickle the bug.
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void (*append)(A *);
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};
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class B {};
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class D;
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// C has to be non-C++98 POD with available tail padding, making the LLVM base
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// type differ from the complete LLVM type.
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class C {
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// This member creates a circular LLVM type reference to %class.D.
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D *m_group;
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B changeListeners;
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};
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class D : C {};
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void fn1(A *p1) {
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}
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void
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fn2(C *) {
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}
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// We end up using an opaque type for 'append' to avoid circular references.
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// CHECK: %class.A = type { {}* }
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// CHECK: %class.C = type <{ %class.D*, %class.B, [3 x i8] }>
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// CHECK: %class.D = type { %class.C.base, [3 x i8] }
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// CHECK: %class.C.base = type <{ %class.D*, %class.B }>
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// CHECK: %class.B = type { i8 }
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