Generated Assembly from LLVM Code

tarLookup:
	.cfi_startproc
	pushq	%r15
	.cfi_def_cfa_offset 16
	pushq	%r14
	.cfi_def_cfa_offset 24
	pushq	%r12
	.cfi_def_cfa_offset 32
	pushq	%rbx
	.cfi_def_cfa_offset 40
	subq	$40, %rsp
	.cfi_def_cfa_offset 80
	.cfi_offset %rbx, -40
	.cfi_offset %r12, -32
	.cfi_offset %r14, -24
	.cfi_offset %r15, -16
	movq	%rdi, 32(%rsp)
	movq	%rsi, 16(%rsp)
	movq	%rdx, 24(%rsp)
	movq	%rdi, (%rsp)
	movl	$257, %r12d
	leaq	.L__unnamed_1(%rip), %rbx
	.p2align	4, 0x90
.LBB3_1:
	movq	(%rsp), %rdi
	addq	%r12, %rdi
	movq	%rbx, %rsi
	movl	$5, %edx
	callq	memeq@PLT
	testb	$1, %al
	je	.LBB3_2
	movq	(%rsp), %rdi
	addq	$124, %rdi
	movl	$11, %esi
	callq	oct2bin@PLT
	movl	%eax, 12(%rsp)
	movq	16(%rsp), %rdi
	callq	strlen@PLT
	leal	30(%rax), %esi
	movl	$1016, %edi
	callq	outb@PLT
	movq	(%rsp), %r14
	movq	16(%rsp), %r15
	movq	%r15, %rdi
	callq	strlen@PLT
	movq	%r14, %rdi
	movq	%r15, %rsi
	movl	%eax, %edx
	callq	memeq@PLT
	testb	$1, %al
	jne	.LBB3_6
	movl	12(%rsp), %eax
	leal	511(%rax), %ecx
	addl	$1022, %eax
	testl	%ecx, %ecx
	cmovnsl	%ecx, %eax
	andl	$-512, %eax
	addl	$512, %eax
	cltq
	addq	%rax, (%rsp)
	jmp	.LBB3_1
.LBB3_2:
	xorl	%eax, %eax
	jmp	.LBB3_3
.LBB3_6:
	movl	$512, %eax
	addq	(%rsp), %rax
	movq	24(%rsp), %rcx
	movq	%rax, (%rcx)
	movl	12(%rsp), %eax
.LBB3_3:
	addq	$40, %rsp
	.cfi_def_cfa_offset 40
	popq	%rbx
	.cfi_def_cfa_offset 32
	popq	%r12
	.cfi_def_cfa_offset 24
	popq	%r14
	.cfi_def_cfa_offset 16
	popq	%r15
	.cfi_def_cfa_offset 8
	retq
.Lfunc_end3:
	.size	tarLookup, .Lfunc_end3-tarLookup
	.cfi_endproc

	.type	.L__unnamed_1,@object
	.section	.rodata.str1.1,"aMS",@progbits,1
.L__unnamed_1:
	.asciz	"ustar"
	.size	.L__unnamed_1, 6