C++ abstract base class and destructors

b.s

	.file	"b.cpp"
	.section	.text._ZN1BD2Ev,"axG",@progbits,B::~B(),comdat
	.align 2
	.weak	B::~B()
	.type	B::~B(), @function
B::~B():
.LFB9:
	.cfi_startproc
	movq	vtable for B+16, (%rdi)
	jmp	A::~A()
	.cfi_endproc
.LFE9:
	.size	B::~B(), .-B::~B()
	.weak	B::~B()
	.set	B::~B(),B::~B()
	.section	.text._ZN1BD0Ev,"axG",@progbits,B::~B(),comdat
	.align 2
	.weak	B::~B()
	.type	B::~B(), @function
B::~B():
.LFB11:
	.cfi_startproc
	pushq	%rbx
	.cfi_def_cfa_offset 16
	.cfi_offset 3, -16
	movq	%rdi, %rbx
	call	B::~B()
	movq	%rbx, %rdi
	popq	%rbx
	.cfi_def_cfa_offset 8
	jmp	operator delete(void*)
	.cfi_endproc
.LFE11:
	.size	B::~B(), .-B::~B()
	.text
	.align 2
	.globl	B::Create()
	.type	B::Create(), @function
B::Create():
.LFB0:
	.cfi_startproc
	pushq	%rax
	.cfi_def_cfa_offset 16
	movl	$8, %edi
	call	operator new(unsigned long)
	movq	vtable for B+16, (%rax)
	popq	%rdx
	.cfi_def_cfa_offset 8
	ret
	.cfi_endproc
.LFE0:
	.size	B::Create(), .-B::Create()
	.section	.text.startup,"ax",@progbits
	.globl	main
	.type	main, @function
main:
.LFB7:
	.cfi_startproc
	pushq	%rcx
	.cfi_def_cfa_offset 16
	call	B::Create()
	xorl	%eax, %eax
	popq	%rsi
	.cfi_def_cfa_offset 8
	ret
	.cfi_endproc
.LFE7:
	.size	main, .-main
	.weak	vtable for A
	.section	.rodata._ZTV1A,"aG",@progbits,vtable for A,comdat
	.align 16
	.type	vtable for A, @object
	.size	vtable for A, 32
vtable for A:
	.quad	0
	.quad	typeinfo for A
	.quad	__cxa_pure_virtual
	.quad	__cxa_pure_virtual
	.weak	vtable for B
	.section	.rodata._ZTV1B,"aG",@progbits,vtable for B,comdat
	.align 16
	.type	vtable for B, @object
	.size	vtable for B, 32
vtable for B:
	.quad	0
	.quad	typeinfo for B
	.quad	B::~B()
	.quad	B::~B()
	.weak	typeinfo for A
	.section	.rodata._ZTI1A,"aG",@progbits,typeinfo for A,comdat
	.align 16
	.type	typeinfo for A, @object
	.size	typeinfo for A, 16
typeinfo for A:
	.quad	vtable for __cxxabiv1::__class_type_info+16
	.quad	typeinfo name for A
	.weak	typeinfo for B
	.section	.rodata._ZTI1B,"aG",@progbits,typeinfo for B,comdat
	.align 16
	.type	typeinfo for B, @object
	.size	typeinfo for B, 24
typeinfo for B:
	.quad	vtable for __cxxabiv1::__si_class_type_info+16
	.quad	typeinfo name for B
	.quad	typeinfo for A
	.weak	typeinfo name for A
	.section	.rodata._ZTS1A,"aG",@progbits,typeinfo name for A,comdat
	.type	typeinfo name for A, @object
	.size	typeinfo name for A, 3
typeinfo name for A:
	.string	"1A"
	.weak	typeinfo name for B
	.section	.rodata._ZTS1B,"aG",@progbits,typeinfo name for B,comdat
	.type	typeinfo name for B, @object
	.size	typeinfo name for B, 3
typeinfo name for B:
	.string	"1B"
	.ident	"GCC: (GNU) 4.7.2 20120921 (Red Hat 4.7.2-2)"
	.section	.note.GNU-stack,"",@progbits