09240ef776
Summary: This patch improves support of PDB as an external layout source in the next cases: - Multiple non-virtual inheritance from packed base classes. When using external layout, there's no need to align `NonVirtualSize` of a base class. It may cause an overlapping when the next base classes will be layouted (but there is a slightly different case in the test because I can't find a way to specify a base offset); - Support of nameless structs and unions. There is no info about nameless child structs and unions in Microsoft cl-emitted PDBs. Instead all its fields are just treated as outer structure's (union's) fields. This also causes a fields overlapping, and makes it possible for unions to have fields located at a non-zero offset. Reviewers: rsmith, zturner, rnk, mstorsjo, majnemer Reviewed By: rnk Subscribers: cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D49871 llvm-svn: 338353
27 lines
497 B
C++
27 lines
497 B
C++
// RUN: %clang_cc1 -w -fdump-record-layouts-simple -foverride-record-layout=%S/Inputs/override-layout-packed-base.layout %s | FileCheck %s
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// CHECK: Type: class B<0>
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// CHECK: FieldOffsets: [0, 32]
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// CHECK: Type: class B<1>
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// CHECK: FieldOffsets: [0, 32]
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//#pragma pack(push, 1)
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template<int I>
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class B {
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int _b1;
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char _b2;
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};
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//#pragma pack(pop)
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// CHECK: Type: class C
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// CHECK: FieldOffsets: [80]
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class C : B<0>, B<1> {
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char _c;
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};
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void use_structs() {
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C cs[sizeof(C)];
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}
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