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llvm-project/clang/test/Layout/ms-x86-pack-and-align.cpp

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Support MS-ABI's concept of "Required Alignment" imposed by __declspec(align()) This patch implements required alignment in a way that makes __declspec(align()) and #pragma pack play correctly together. In the MS-ABI, __declspec(align()) is a hard rule and cannot be overridden by #pragma pack. This cases each record to have two interesting alignments "preferred alignment" (which matches Itanium's concept of alignment) and "required alignment" which is an alignment that must never be violated, even in the case of #pragma pack. This patch introduces the concept of Required Alignment to the record builder and tracks/uses it appropriately. Test cases are included. Differential Revision: http://llvm-reviews.chandlerc.com/D2283 llvm-svn: 196549
2013-12-06 08:01:17 +08:00
// RUN: %clang_cc1 -fno-rtti -emit-llvm-only -triple i686-pc-win32 -fdump-record-layouts -fsyntax-only -cxx-abi microsoft %s 2>&1 \
// RUN: | FileCheck %s
// RUN: %clang_cc1 -fno-rtti -emit-llvm-only -triple x86_64-pc-win32 -fdump-record-layouts -fsyntax-only -cxx-abi microsoft %s 2>/dev/null \
// RUN: | FileCheck %s -check-prefix CHECK-X64
extern "C" int printf(const char *fmt, ...);
char buffer[419430400];
struct A {
char a;
A() {
printf("A = %d\n", (int)((char*)this - buffer));
printf("A.a = %d\n", (int)((char*)&a - buffer));
}
};
struct B {
__declspec(align(4)) long long a;
B() {
printf("B = %d\n", (int)((char*)this - buffer));
printf("B.a = %d\n", (int)((char*)&a - buffer));
}
};
#pragma pack(push, 2)
struct X {
B a;
char b;
int c;
X() {
printf("X = %d\n", (int)((char*)this - buffer));
printf("X.a = %d\n", (int)((char*)&a - buffer));
printf("X.b = %d\n", (int)((char*)&b - buffer));
printf("X.c = %d\n", (int)((char*)&c - buffer));
}
};
// CHECK: *** Dumping AST Record Layout
[ms-abi] Refactor Microsoft Record Layout This patch refactors microsoft record layout to be more "natural". The most dominant change is that vbptrs and vfptrs are injected after the fact. This simplifies the implementation and the math for the offest for the first base/field after the vbptr. llvm-svn: 198818
2014-01-09 08:30:56 +08:00
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct X
// CHECK-NEXT: 0 | struct B a
// CHECK-NEXT: 0 | long long a
// CHECK: 8 | char b
// CHECK-NEXT: 10 | int c
// CHECK-NEXT: | [sizeof=16, align=4
// CHECK-NEXT: | nvsize=16, nvalign=4]
// CHECK-X64: *** Dumping AST Record Layout
Support MS-ABI's concept of "Required Alignment" imposed by __declspec(align()) This patch implements required alignment in a way that makes __declspec(align()) and #pragma pack play correctly together. In the MS-ABI, __declspec(align()) is a hard rule and cannot be overridden by #pragma pack. This cases each record to have two interesting alignments "preferred alignment" (which matches Itanium's concept of alignment) and "required alignment" which is an alignment that must never be violated, even in the case of #pragma pack. This patch introduces the concept of Required Alignment to the record builder and tracks/uses it appropriately. Test cases are included. Differential Revision: http://llvm-reviews.chandlerc.com/D2283 llvm-svn: 196549
2013-12-06 08:01:17 +08:00
// CHECK-X64: *** Dumping AST Record Layout
[ms-abi] Refactor Microsoft Record Layout This patch refactors microsoft record layout to be more "natural". The most dominant change is that vbptrs and vfptrs are injected after the fact. This simplifies the implementation and the math for the offest for the first base/field after the vbptr. llvm-svn: 198818
2014-01-09 08:30:56 +08:00
// CHECK-X64-NEXT: 0 | struct X
// CHECK-X64-NEXT: 0 | struct B a
// CHECK-X64-NEXT: 0 | long long a
// CHECK-X64: 8 | char b
// CHECK-X64-NEXT: 10 | int c
// CHECK-X64-NEXT: | [sizeof=16, align=4
// CHECK-X64-NEXT: | nvsize=16, nvalign=4]
Support MS-ABI's concept of "Required Alignment" imposed by __declspec(align()) This patch implements required alignment in a way that makes __declspec(align()) and #pragma pack play correctly together. In the MS-ABI, __declspec(align()) is a hard rule and cannot be overridden by #pragma pack. This cases each record to have two interesting alignments "preferred alignment" (which matches Itanium's concept of alignment) and "required alignment" which is an alignment that must never be violated, even in the case of #pragma pack. This patch introduces the concept of Required Alignment to the record builder and tracks/uses it appropriately. Test cases are included. Differential Revision: http://llvm-reviews.chandlerc.com/D2283 llvm-svn: 196549
2013-12-06 08:01:17 +08:00
struct Y : A, B {
char a;
int b;
Y() {
printf("Y = %d\n", (int)((char*)this - buffer));
printf("Y.a = %d\n", (int)((char*)&a - buffer));
printf("Y.b = %d\n", (int)((char*)&b - buffer));
}
};
// CHECK: *** Dumping AST Record Layout
[ms-abi] Refactor Microsoft Record Layout This patch refactors microsoft record layout to be more "natural". The most dominant change is that vbptrs and vfptrs are injected after the fact. This simplifies the implementation and the math for the offest for the first base/field after the vbptr. llvm-svn: 198818
2014-01-09 08:30:56 +08:00
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct Y
// CHECK-NEXT: 0 | struct A (base)
// CHECK-NEXT: 0 | char a
// CHECK-NEXT: 4 | struct B (base)
// CHECK-NEXT: 4 | long long a
// CHECK-NEXT: 12 | char a
// CHECK-NEXT: 14 | int b
// CHECK-NEXT: | [sizeof=20, align=4
// CHECK-NEXT: | nvsize=20, nvalign=4]
Support MS-ABI's concept of "Required Alignment" imposed by __declspec(align()) This patch implements required alignment in a way that makes __declspec(align()) and #pragma pack play correctly together. In the MS-ABI, __declspec(align()) is a hard rule and cannot be overridden by #pragma pack. This cases each record to have two interesting alignments "preferred alignment" (which matches Itanium's concept of alignment) and "required alignment" which is an alignment that must never be violated, even in the case of #pragma pack. This patch introduces the concept of Required Alignment to the record builder and tracks/uses it appropriately. Test cases are included. Differential Revision: http://llvm-reviews.chandlerc.com/D2283 llvm-svn: 196549
2013-12-06 08:01:17 +08:00
// CHECK-X64: *** Dumping AST Record Layout
[ms-abi] Refactor Microsoft Record Layout This patch refactors microsoft record layout to be more "natural". The most dominant change is that vbptrs and vfptrs are injected after the fact. This simplifies the implementation and the math for the offest for the first base/field after the vbptr. llvm-svn: 198818
2014-01-09 08:30:56 +08:00
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64-NEXT: 0 | struct Y
// CHECK-X64-NEXT: 0 | struct A (base)
// CHECK-X64-NEXT: 0 | char a
// CHECK-X64-NEXT: 4 | struct B (base)
// CHECK-X64-NEXT: 4 | long long a
// CHECK-X64-NEXT: 12 | char a
// CHECK-X64-NEXT: 14 | int b
// CHECK-X64-NEXT: | [sizeof=20, align=4
// CHECK-X64-NEXT: | nvsize=20, nvalign=4]
Support MS-ABI's concept of "Required Alignment" imposed by __declspec(align()) This patch implements required alignment in a way that makes __declspec(align()) and #pragma pack play correctly together. In the MS-ABI, __declspec(align()) is a hard rule and cannot be overridden by #pragma pack. This cases each record to have two interesting alignments "preferred alignment" (which matches Itanium's concept of alignment) and "required alignment" which is an alignment that must never be violated, even in the case of #pragma pack. This patch introduces the concept of Required Alignment to the record builder and tracks/uses it appropriately. Test cases are included. Differential Revision: http://llvm-reviews.chandlerc.com/D2283 llvm-svn: 196549
2013-12-06 08:01:17 +08:00
struct Z : virtual B {
char a;
int b;
Z() {
printf("Z = %d\n", (int)((char*)this - buffer));
printf("Z.a = %d\n", (int)((char*)&a - buffer));
printf("Z.b = %d\n", (int)((char*)&b - buffer));
}
};
// CHECK: *** Dumping AST Record Layout
[ms-abi] Refactor Microsoft Record Layout This patch refactors microsoft record layout to be more "natural". The most dominant change is that vbptrs and vfptrs are injected after the fact. This simplifies the implementation and the math for the offest for the first base/field after the vbptr. llvm-svn: 198818
2014-01-09 08:30:56 +08:00
// CHECK-NEXT: 0 | struct Z
// CHECK-NEXT: 0 | (Z vbtable pointer)
// CHECK-NEXT: 4 | char a
// CHECK-NEXT: 6 | int b
// CHECK-NEXT: 12 | struct B (virtual base)
// CHECK-NEXT: 12 | long long a
// CHECK-NEXT: | [sizeof=20, align=4
// CHECK-NEXT: | nvsize=10, nvalign=4]
Support MS-ABI's concept of "Required Alignment" imposed by __declspec(align()) This patch implements required alignment in a way that makes __declspec(align()) and #pragma pack play correctly together. In the MS-ABI, __declspec(align()) is a hard rule and cannot be overridden by #pragma pack. This cases each record to have two interesting alignments "preferred alignment" (which matches Itanium's concept of alignment) and "required alignment" which is an alignment that must never be violated, even in the case of #pragma pack. This patch introduces the concept of Required Alignment to the record builder and tracks/uses it appropriately. Test cases are included. Differential Revision: http://llvm-reviews.chandlerc.com/D2283 llvm-svn: 196549
2013-12-06 08:01:17 +08:00
// CHECK-X64: *** Dumping AST Record Layout
[ms-abi] Refactor Microsoft Record Layout This patch refactors microsoft record layout to be more "natural". The most dominant change is that vbptrs and vfptrs are injected after the fact. This simplifies the implementation and the math for the offest for the first base/field after the vbptr. llvm-svn: 198818
2014-01-09 08:30:56 +08:00
// CHECK-X64-NEXT: 0 | struct Z
// CHECK-X64-NEXT: 0 | (Z vbtable pointer)
// CHECK-X64-NEXT: 8 | char a
// CHECK-X64-NEXT: 10 | int b
// CHECK-X64-NEXT: 16 | struct B (virtual base)
// CHECK-X64-NEXT: 16 | long long a
// CHECK-X64-NEXT: | [sizeof=24, align=4
// CHECK-X64-NEXT: | nvsize=14, nvalign=4]
Support MS-ABI's concept of "Required Alignment" imposed by __declspec(align()) This patch implements required alignment in a way that makes __declspec(align()) and #pragma pack play correctly together. In the MS-ABI, __declspec(align()) is a hard rule and cannot be overridden by #pragma pack. This cases each record to have two interesting alignments "preferred alignment" (which matches Itanium's concept of alignment) and "required alignment" which is an alignment that must never be violated, even in the case of #pragma pack. This patch introduces the concept of Required Alignment to the record builder and tracks/uses it appropriately. Test cases are included. Differential Revision: http://llvm-reviews.chandlerc.com/D2283 llvm-svn: 196549
2013-12-06 08:01:17 +08:00
#pragma pack(pop)
[ms-abi] Makes Virtual Base Alignment Look at All Virtual Bases Prior to this patch, the alignment imposed by virtual bases only included direct virtual bases. This patch fixes it to look at all virtual bases. llvm-svn: 196997
2013-12-11 10:21:03 +08:00
struct A1 { long long a; };
#pragma pack(push, 1)
struct B1 : virtual A1 { char a; };
#pragma pack(pop)
struct C1 : B1 {};
[ms-abi] Fixes improperly sized vfptrs with pragma pack With pragma pack, the layout engine would produce vfptrs that were packed width rather than pointer width. This patch addresses the issue and adds a test case. llvm-svn: 198059
2013-12-27 06:09:12 +08:00
[ms-abi] Makes Virtual Base Alignment Look at All Virtual Bases Prior to this patch, the alignment imposed by virtual bases only included direct virtual bases. This patch fixes it to look at all virtual bases. llvm-svn: 196997
2013-12-11 10:21:03 +08:00
// CHECK: *** Dumping AST Record Layout
[ms-abi] Refactor Microsoft Record Layout This patch refactors microsoft record layout to be more "natural". The most dominant change is that vbptrs and vfptrs are injected after the fact. This simplifies the implementation and the math for the offest for the first base/field after the vbptr. llvm-svn: 198818
2014-01-09 08:30:56 +08:00
// CHECK: *** Dumping AST Record Layout
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct C1
// CHECK-NEXT: 0 | struct B1 (base)
// CHECK-NEXT: 0 | (B1 vbtable pointer)
// CHECK-NEXT: 4 | char a
// CHECK-NEXT: 8 | struct A1 (virtual base)
// CHECK-NEXT: 8 | long long a
// CHECK-NEXT: | [sizeof=16, align=8
// CHECK-NEXT: | nvsize=5, nvalign=8]
[ms-abi] Makes Virtual Base Alignment Look at All Virtual Bases Prior to this patch, the alignment imposed by virtual bases only included direct virtual bases. This patch fixes it to look at all virtual bases. llvm-svn: 196997
2013-12-11 10:21:03 +08:00
// CHECK-X64: *** Dumping AST Record Layout
[ms-abi] Refactor Microsoft Record Layout This patch refactors microsoft record layout to be more "natural". The most dominant change is that vbptrs and vfptrs are injected after the fact. This simplifies the implementation and the math for the offest for the first base/field after the vbptr. llvm-svn: 198818
2014-01-09 08:30:56 +08:00
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64-NEXT: 0 | struct C1
// CHECK-X64-NEXT: 0 | struct B1 (base)
// CHECK-X64-NEXT: 0 | (B1 vbtable pointer)
// CHECK-X64-NEXT: 8 | char a
// CHECK-X64-NEXT: 16 | struct A1 (virtual base)
// CHECK-X64-NEXT: 16 | long long a
// CHECK-X64-NEXT: | [sizeof=24, align=8
// CHECK-X64-NEXT: | nvsize=9, nvalign=8]
[ms-abi] Makes Virtual Base Alignment Look at All Virtual Bases Prior to this patch, the alignment imposed by virtual bases only included direct virtual bases. This patch fixes it to look at all virtual bases. llvm-svn: 196997
2013-12-11 10:21:03 +08:00
[ms-abi] Fixes improperly sized vfptrs with pragma pack With pragma pack, the layout engine would produce vfptrs that were packed width rather than pointer width. This patch addresses the issue and adds a test case. llvm-svn: 198059
2013-12-27 06:09:12 +08:00
struct CA0 {
CA0() {}
};
struct CA1 : virtual CA0 {
CA1() {}
};
#pragma pack(push, 1)
struct CA2 : public CA1, public CA0 {
virtual void CA2Method() {}
CA2() {}
};
#pragma pack(pop)
// CHECK: *** Dumping AST Record Layout
[ms-abi] Refactor Microsoft Record Layout This patch refactors microsoft record layout to be more "natural". The most dominant change is that vbptrs and vfptrs are injected after the fact. This simplifies the implementation and the math for the offest for the first base/field after the vbptr. llvm-svn: 198818
2014-01-09 08:30:56 +08:00
// CHECK: *** Dumping AST Record Layout
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct CA2
// CHECK-NEXT: 0 | (CA2 vftable pointer)
// CHECK-NEXT: 4 | struct CA1 (base)
// CHECK-NEXT: 4 | (CA1 vbtable pointer)
// CHECK-NEXT: 9 | struct CA0 (base) (empty)
// CHECK-NEXT: 9 | struct CA0 (virtual base) (empty)
// CHECK-NEXT: | [sizeof=9, align=1
// CHECK-NEXT: | nvsize=9, nvalign=1]
// CHECK-C64: *** Dumping AST Record Layout
// CHECK-C64: *** Dumping AST Record Layout
[ms-abi] Fixes improperly sized vfptrs with pragma pack With pragma pack, the layout engine would produce vfptrs that were packed width rather than pointer width. This patch addresses the issue and adds a test case. llvm-svn: 198059
2013-12-27 06:09:12 +08:00
// CHECK-C64: *** Dumping AST Record Layout
[ms-abi] Refactor Microsoft Record Layout This patch refactors microsoft record layout to be more "natural". The most dominant change is that vbptrs and vfptrs are injected after the fact. This simplifies the implementation and the math for the offest for the first base/field after the vbptr. llvm-svn: 198818
2014-01-09 08:30:56 +08:00
// CHECK-C64-NEXT: 0 | struct CA2
// CHECK-C64-NEXT: 0 | (CA2 vftable pointer)
// CHECK-C64-NEXT: 8 | struct CA1 (base)
// CHECK-C64-NEXT: 8 | (CA1 vbtable pointer)
// CHECK-C64-NEXT: 17 | struct CA0 (base) (empty)
// CHECK-C64-NEXT: 17 | struct CA0 (virtual base) (empty)
// CHECK-C64-NEXT: | [sizeof=17, align=1
// CHECK-C64-NEXT: | nvsize=17, nvalign=1]
[ms-abi] Fixes improperly sized vfptrs with pragma pack With pragma pack, the layout engine would produce vfptrs that were packed width rather than pointer width. This patch addresses the issue and adds a test case. llvm-svn: 198059
2013-12-27 06:09:12 +08:00
[ms-abi] Handle __declspec(align) on bitfields "properly" __declspec(align), when applied to bitfields affects their perferred alignment instead of their required alignment. We don't know why. Also, #pragma pack(n) turns packing *off* if n is greater than the pointer size. This is now observable because of the impact of declspec(align) on bitfields. llvm-svn: 198907
2014-01-10 09:28:05 +08:00
#pragma pack(16)
struct YA {
__declspec(align(32)) char : 1;
};
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct YA (empty)
// CHECK-NEXT: 0 | char
// CHECK-NEXT: | [sizeof=32, align=32
// CHECK-NEXT: | nvsize=32, nvalign=32]
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64-NEXT: 0 | struct YA (empty)
// CHECK-X64-NEXT: 0 | char
// CHECK-X64-NEXT: | [sizeof=32, align=32
// CHECK-X64-NEXT: | nvsize=32, nvalign=32]
#pragma pack(1)
struct YB {
char a;
YA b;
};
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct YB
// CHECK-NEXT: 0 | char a
// CHECK-NEXT: 1 | struct YA b (empty)
// CHECK-NEXT: 1 | char
// CHECK: | [sizeof=33, align=1
// CHECK-NEXT: | nvsize=33, nvalign=1]
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64-NEXT: 0 | struct YB
// CHECK-X64-NEXT: 0 | char a
// CHECK-X64-NEXT: 1 | struct YA b (empty)
// CHECK-X64-NEXT: 1 | char
// CHECK-X64: | [sizeof=33, align=1
// CHECK-X64-NEXT: | nvsize=33, nvalign=1]
#pragma pack(8)
struct YC {
__declspec(align(32)) char : 1;
};
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct YC (empty)
// CHECK-NEXT: 0 | char
// CHECK-NEXT: | [sizeof=32, align=32
// CHECK-NEXT: | nvsize=32, nvalign=32]
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64-NEXT: 0 | struct YC (empty)
// CHECK-X64-NEXT: 0 | char
// CHECK-X64-NEXT: | [sizeof=8, align=8
// CHECK-X64-NEXT: | nvsize=8, nvalign=8]
#pragma pack(1)
struct YD {
char a;
YC b;
};
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct YD
// CHECK-NEXT: 0 | char a
// CHECK-NEXT: 1 | struct YC b (empty)
// CHECK-NEXT: 1 | char
// CHECK: | [sizeof=33, align=1
// CHECK-NEXT: | nvsize=33, nvalign=1]
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64-NEXT: 0 | struct YD
// CHECK-X64-NEXT: 0 | char a
// CHECK-X64-NEXT: 1 | struct YC b (empty)
// CHECK-X64-NEXT: 1 | char
// CHECK-X64: | [sizeof=9, align=1
// CHECK-X64-NEXT: | nvsize=9, nvalign=1]
#pragma pack(4)
struct YE {
__declspec(align(32)) char : 1;
};
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct YE (empty)
// CHECK-NEXT: 0 | char
// CHECK-NEXT: | [sizeof=4, align=4
// CHECK-NEXT: | nvsize=4, nvalign=4]
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64-NEXT: 0 | struct YE (empty)
// CHECK-X64-NEXT: 0 | char
// CHECK-X64-NEXT: | [sizeof=4, align=4
// CHECK-X64-NEXT: | nvsize=4, nvalign=4]
#pragma pack(1)
struct YF {
char a;
YE b;
};
// CHECK: *** Dumping AST Record Layout
// CHECK-NEXT: 0 | struct YF
// CHECK-NEXT: 0 | char a
// CHECK-NEXT: 1 | struct YE b (empty)
// CHECK-NEXT: 1 | char
// CHECK: | [sizeof=5, align=1
// CHECK-NEXT: | nvsize=5, nvalign=1]
// CHECK-X64: *** Dumping AST Record Layout
// CHECK-X64-NEXT: 0 | struct YF
// CHECK-X64-NEXT: 0 | char a
// CHECK-X64-NEXT: 1 | struct YE b (empty)
// CHECK-X64-NEXT: 1 | char
// CHECK-X64: | [sizeof=5, align=1
// CHECK-X64-NEXT: | nvsize=5, nvalign=1]
Support MS-ABI's concept of "Required Alignment" imposed by __declspec(align()) This patch implements required alignment in a way that makes __declspec(align()) and #pragma pack play correctly together. In the MS-ABI, __declspec(align()) is a hard rule and cannot be overridden by #pragma pack. This cases each record to have two interesting alignments "preferred alignment" (which matches Itanium's concept of alignment) and "required alignment" which is an alignment that must never be violated, even in the case of #pragma pack. This patch introduces the concept of Required Alignment to the record builder and tracks/uses it appropriately. Test cases are included. Differential Revision: http://llvm-reviews.chandlerc.com/D2283 llvm-svn: 196549
2013-12-06 08:01:17 +08:00
int a[
sizeof(X)+
sizeof(Y)+
[ms-abi] Makes Virtual Base Alignment Look at All Virtual Bases Prior to this patch, the alignment imposed by virtual bases only included direct virtual bases. This patch fixes it to look at all virtual bases. llvm-svn: 196997
2013-12-11 10:21:03 +08:00
sizeof(Z)+
[ms-abi] Fixes improperly sized vfptrs with pragma pack With pragma pack, the layout engine would produce vfptrs that were packed width rather than pointer width. This patch addresses the issue and adds a test case. llvm-svn: 198059
2013-12-27 06:09:12 +08:00
sizeof(C1)+
[ms-abi] Handle __declspec(align) on bitfields "properly" __declspec(align), when applied to bitfields affects their perferred alignment instead of their required alignment. We don't know why. Also, #pragma pack(n) turns packing *off* if n is greater than the pointer size. This is now observable because of the impact of declspec(align) on bitfields. llvm-svn: 198907
2014-01-10 09:28:05 +08:00
sizeof(CA2)+
sizeof(YA)+
sizeof(YB)+
sizeof(YC)+
sizeof(YD)+
sizeof(YE)+
sizeof(YF)+
0];