Some changes to improve compatibility for MSVC-style C++ struct layout. Patch from r4start at gmail.com (with some minor modifications by me).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140623 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/ms_class_layout.cpp b/test/Sema/ms_class_layout.cpp
new file mode 100644
index 0000000..13c90b0
--- /dev/null
+++ b/test/Sema/ms_class_layout.cpp
@@ -0,0 +1,176 @@
+// RUN: %clang_cc1 -emit-llvm-only -triple i686-pc-win32 -fdump-record-layouts -cxx-abi microsoft %s 2>&1 \
+// RUN: | FileCheck %s
+
+#pragma pack(push, 8)
+
+class B {
+public:
+ virtual void b(){}
+ int b_field;
+protected:
+private:
+};
+
+class A : public B {
+public:
+ int a_field;
+ virtual void a(){}
+ char one;
+protected:
+private:
+};
+
+class D {
+public:
+ virtual void b(){}
+ double a;
+};
+
+class C : public virtual A,
+ public D, public B {
+public:
+ double c1_field;
+ int c2_field;
+ double c3_field;
+ int c4_field;
+ virtual void foo(){}
+ virtual void bar(){}
+protected:
+private:
+};
+
+struct BaseStruct
+{
+ BaseStruct(){}
+ double v0;
+ float v1;
+ C fg;
+};
+
+struct DerivedStruct : public BaseStruct {
+ int x;
+};
+
+struct G
+{
+ virtual ~G(){}
+ int a;
+ double b;
+};
+
+#pragma pack(pop)
+
+// This needs only for building layouts.
+// Without this clang doesn`t dump record layouts.
+int main() {
+ // This avoid "Can't yet mangle constructors!" for MS ABI.
+ C* c;
+ c->foo();
+ DerivedStruct* v;
+ G* g;
+ BaseStruct* u;
+ return 0;
+}
+
+// CHECK: 0 | class D
+// CHECK-NEXT: 0 | (D vtable pointer)
+// CHECK-NEXT: 8 | double a
+
+// CHECK-NEXT: sizeof=16, dsize=16, align=8
+// CHECK-NEXT: nvsize=16, nvalign=8
+
+// CHECK: 0 | class B
+// CHECK-NEXT: 0 | (B vtable pointer)
+// CHECK-NEXT: 4 | int b_field
+
+// CHECK-NEXT: sizeof=8, dsize=8, align=4
+// CHECK-NEXT: nvsize=8, nvalign=4
+
+// CHECK: 0 | class A
+// CHECK-NEXT: 0 | class B (primary base)
+// CHECK-NEXT: 0 | (B vtable pointer)
+// CHECK-NEXT: 4 | int b_field
+// CHECK-NEXT: 8 | int a_field
+// CHECK-NEXT: 12 | char one
+
+// CHECK-NEXT: sizeof=16, dsize=16, align=4
+// CHECK-NEXT: nvsize=16, nvalign=4
+
+// CHECK: 0 | class C
+// CHECK-NEXT: 0 | class D (primary base)
+// CHECK-NEXT: 0 | (D vtable pointer)
+// CHECK-NEXT: 8 | double a
+// CHECK-NEXT: 16 | class B (base)
+// CHECK-NEXT: 16 | (B vtable pointer)
+// CHECK-NEXT: 20 | int b_field
+// CHECK-NEXT: 24 | (C vbtable pointer)
+// CHECK-NEXT: 32 | double c1_field
+// CHECK-NEXT: 40 | int c2_field
+// CHECK-NEXT: 48 | double c3_field
+// CHECK-NEXT: 56 | int c4_field
+// CHECK-NEXT: 64 | class A (virtual base)
+// CHECK-NEXT: 64 | class B (primary base)
+// CHECK-NEXT: 64 | (B vtable pointer)
+// CHECK-NEXT: 68 | int b_field
+// CHECK-NEXT: 72 | int a_field
+// CHECK-NEXT: 76 | char one
+
+// CHECK-NEXT: sizeof=80, dsize=80, align=8
+// CHECK-NEXT: nvsize=80, nvalign=8
+
+// CHECK: 0 | struct BaseStruct
+// CHECK-NEXT: 0 | double v0
+// CHECK-NEXT: 8 | float v1
+// CHECK-NEXT: 16 | class C fg
+// CHECK-NEXT: 16 | class D (primary base)
+// CHECK-NEXT: 16 | (D vtable pointer)
+// CHECK-NEXT: 24 | double a
+// CHECK-NEXT: 32 | class B (base)
+// CHECK-NEXT: 32 | (B vtable pointer)
+// CHECK-NEXT: 36 | int b_field
+// CHECK-NEXT: 40 | (C vbtable pointer)
+// CHECK-NEXT: 48 | double c1_field
+// CHECK-NEXT: 56 | int c2_field
+// CHECK-NEXT: 64 | double c3_field
+// CHECK-NEXT: 72 | int c4_field
+// CHECK-NEXT: 80 | class A (virtual base)
+// CHECK-NEXT: 80 | class B (primary base)
+// CHECK-NEXT: 80 | (B vtable pointer)
+// CHECK-NEXT: 84 | int b_field
+// CHECK-NEXT: 88 | int a_field
+// CHECK-NEXT: 92 | char one
+
+// CHECK-NEXT: sizeof=80, dsize=80, align=8
+// CHECK-NEXT: nvsize=80, nvalign=8
+
+// CHECK: sizeof=96, dsize=96, align=8
+// CHECK-NEXT: nvsize=96, nvalign=8
+
+// CHECK: 0 | struct DerivedStruct
+// CHECK-NEXT: 0 | struct BaseStruct (base)
+// CHECK-NEXT: 0 | double v0
+// CHECK-NEXT: 8 | float v1
+// CHECK-NEXT: 16 | class C fg
+// CHECK-NEXT: 16 | class D (primary base)
+// CHECK-NEXT: 16 | (D vtable pointer)
+// CHECK-NEXT: 24 | double a
+// CHECK-NEXT: 32 | class B (base)
+// CHECK-NEXT: 32 | (B vtable pointer)
+// CHECK-NEXT: 36 | int b_field
+// CHECK-NEXT: 40 | (C vbtable pointer)
+// CHECK-NEXT: 48 | double c1_field
+// CHECK-NEXT: 56 | int c2_field
+// CHECK-NEXT: 64 | double c3_field
+// CHECK-NEXT: 72 | int c4_field
+// CHECK-NEXT: 80 | class A (virtual base)
+// CHECK-NEXT: 80 | class B (primary base)
+// CHECK-NEXT: 80 | (B vtable pointer)
+// CHECK-NEXT: 84 | int b_field
+// CHECK-NEXT: 88 | int a_field
+// CHECK-NEXT: 92 | char one
+// CHECK-NEXT: sizeof=80, dsize=80, align=8
+// CHECK-NEXT: nvsize=80, nvalign=8
+
+// CHECK: 96 | int x
+// CHECK-NEXT: sizeof=104, dsize=104, align=8
+// CHECK-NEXT: nvsize=104, nvalign=8