master.s

	.text
	.file	"t.3a1fbbbh-cgu.0"
	.section	.text.repeat_take_collect,"ax",@progbits
	.globl	repeat_take_collect
	.p2align	4, 0x90
	.type	repeat_take_collect,@function
repeat_take_collect:
	.cfi_startproc
	pushq	%r14
	.cfi_def_cfa_offset 16
	pushq	%rbx
	.cfi_def_cfa_offset 24
	pushq	%rax
	.cfi_def_cfa_offset 32
	.cfi_offset %rbx, -24
	.cfi_offset %r14, -16
	movq	%rdi, %r14
	movl	$100000, %edi
	movl	$1, %esi
	callq	*__rust_alloc@GOTPCREL(%rip)
	testq	%rax, %rax
	je	.LBB0_1
	movq	%rax, %rbx
	movl	$100000, %edx
	movq	%rax, %rdi
	movl	$42, %esi
	callq	*memset@GOTPCREL(%rip)
	movq	%rbx, (%r14)
	movq	$100000, 8(%r14)
	movq	$100000, 16(%r14)
	movq	%r14, %rax
	addq	$8, %rsp
	.cfi_def_cfa_offset 24
	popq	%rbx
	.cfi_def_cfa_offset 16
	popq	%r14
	.cfi_def_cfa_offset 8
	retq
.LBB0_1:
	.cfi_def_cfa_offset 32
	movl	$100000, %edi
	movl	$1, %esi
	callq	*_ZN5alloc5alloc18handle_alloc_error17h95a515922c515945E@GOTPCREL(%rip)
	ud2
.Lfunc_end0:
	.size	repeat_take_collect, .Lfunc_end0-repeat_take_collect
	.cfi_endproc


	.section	".note.GNU-stack","",@progbits

overflow-checks.s

	.text
	.file	"t.3a1fbbbh-cgu.0"
	.section	.text._ZN4core3ptr13drop_in_place17h2c2f733c21d42e6bE,"ax",@progbits
	.p2align	4, 0x90
	.type	_ZN4core3ptr13drop_in_place17h2c2f733c21d42e6bE,@function
_ZN4core3ptr13drop_in_place17h2c2f733c21d42e6bE:
	.cfi_startproc
	movq	16(%rdi), %rax
	movq	24(%rdi), %rcx
	movq	%rcx, (%rax)
	retq
.Lfunc_end0:
	.size	_ZN4core3ptr13drop_in_place17h2c2f733c21d42e6bE, .Lfunc_end0-_ZN4core3ptr13drop_in_place17h2c2f733c21d42e6bE
	.cfi_endproc

	.section	.text._ZN4core3ptr13drop_in_place17h83e065ba23a366a3E,"ax",@progbits
	.p2align	4, 0x90
	.type	_ZN4core3ptr13drop_in_place17h83e065ba23a366a3E,@function
_ZN4core3ptr13drop_in_place17h83e065ba23a366a3E:
	.cfi_startproc
	movq	8(%rdi), %rsi
	testq	%rsi, %rsi
	je	.LBB1_1
	movq	(%rdi), %rdi
	movl	$1, %edx
	jmpq	*__rust_dealloc@GOTPCREL(%rip)
.LBB1_1:
	retq
.Lfunc_end1:
	.size	_ZN4core3ptr13drop_in_place17h83e065ba23a366a3E, .Lfunc_end1-_ZN4core3ptr13drop_in_place17h83e065ba23a366a3E
	.cfi_endproc

	.section	.text.repeat_take_collect,"ax",@progbits
	.globl	repeat_take_collect
	.p2align	4, 0x90
	.type	repeat_take_collect,@function
repeat_take_collect:
.Lfunc_begin0:
	.cfi_startproc
	.cfi_personality 155, DW.ref.rust_eh_personality
	.cfi_lsda 27, .Lexception0
	pushq	%r14
	.cfi_def_cfa_offset 16
	pushq	%rbx
	.cfi_def_cfa_offset 24
	subq	$56, %rsp
	.cfi_def_cfa_offset 80
	.cfi_offset %rbx, -24
	.cfi_offset %r14, -16
	movq	%rdi, %rbx
	movq	$1, (%rdi)
	xorps	%xmm0, %xmm0
	movups	%xmm0, 8(%rdi)
	movl	$100000, %edi
	movl	$1, %esi
	callq	*__rust_alloc@GOTPCREL(%rip)
	testq	%rax, %rax
	je	.LBB2_8
	movq	%rax, %rcx
	leaq	16(%rbx), %rdi
	movq	%rax, (%rbx)
	movq	$100000, 8(%rbx)
	movb	$42, 16(%rsp)
	leaq	8(%rsp), %rax
	movq	%rax, 24(%rsp)
	movq	%rcx, 32(%rsp)
	movq	%rdi, 40(%rsp)
	movq	$0, 48(%rsp)
	movb	$42, (%rcx)
	movq	$99998, 8(%rsp)
	movb	$42, 1(%rcx)
	movq	$99997, 8(%rsp)
	movb	$42, 2(%rcx)
	addq	$3, %rcx
	movl	$3, %esi
	.p2align	4, 0x90
.LBB2_2:
	movq	8(%rsp), %rax
	testq	%rax, %rax
	je	.LBB2_7
	movzbl	16(%rsp), %edx
	addq	$-1, %rax
	movq	%rax, 8(%rsp)
	movb	%dl, (%rcx)
	addq	$1, %rcx
	incq	%rsi
	jne	.LBB2_2
	movq	%rcx, 32(%rsp)
	movq	$-1, 48(%rsp)
.Ltmp0:
	leaq	str.0(%rip), %rdi
	leaq	.L__unnamed_1(%rip), %rdx
	movl	$28, %esi
	callq	*_ZN4core9panicking5panic17hed82ea7bfab0ba01E@GOTPCREL(%rip)
.Ltmp1:
	ud2
.LBB2_7:
	movq	%rsi, (%rdi)
	movq	%rbx, %rax
	addq	$56, %rsp
	.cfi_def_cfa_offset 24
	popq	%rbx
	.cfi_def_cfa_offset 16
	popq	%r14
	.cfi_def_cfa_offset 8
	retq
.LBB2_8:
	.cfi_def_cfa_offset 80
	movl	$100000, %edi
	movl	$1, %esi
	callq	*_ZN5alloc5alloc18handle_alloc_error17hb2c978dc513a9d3cE@GOTPCREL(%rip)
	ud2
.LBB2_6:
.Ltmp2:
	movq	%rax, %r14
	leaq	24(%rsp), %rdi
	callq	_ZN4core3ptr13drop_in_place17h2c2f733c21d42e6bE
	movq	%rbx, %rdi
	callq	_ZN4core3ptr13drop_in_place17h83e065ba23a366a3E
	movq	%r14, %rdi
	callq	_Unwind_Resume@PLT
	ud2
.Lfunc_end2:
	.size	repeat_take_collect, .Lfunc_end2-repeat_take_collect
	.cfi_endproc
	.section	.gcc_except_table,"a",@progbits
	.p2align	2
GCC_except_table2:
.Lexception0:
	.byte	255
	.byte	255
	.byte	1
	.uleb128 .Lcst_end0-.Lcst_begin0
.Lcst_begin0:
	.uleb128 .Ltmp0-.Lfunc_begin0
	.uleb128 .Ltmp1-.Ltmp0
	.uleb128 .Ltmp2-.Lfunc_begin0
	.byte	0
	.uleb128 .Ltmp1-.Lfunc_begin0
	.uleb128 .Lfunc_end2-.Ltmp1
	.byte	0
	.byte	0
.Lcst_end0:
	.p2align	2

	.type	str.0,@object
	.section	.rodata.str.0,"a",@progbits
	.p2align	4
str.0:
	.ascii	"attempt to add with overflow"
	.size	str.0, 28

	.type	.L__unnamed_2,@object
	.section	.rodata..L__unnamed_2,"a",@progbits
.L__unnamed_2:
	.ascii	"/home/alex/p/rust/src/liballoc/vec.rs"
	.size	.L__unnamed_2, 37

	.type	.L__unnamed_1,@object
	.section	.data.rel.ro..L__unnamed_1,"aw",@progbits
	.p2align	3
.L__unnamed_1:
	.quad	.L__unnamed_2
	.asciz	"%\000\000\000\000\000\000\000\272\006\000\000\t\000\000"
	.size	.L__unnamed_1, 24

	.hidden	DW.ref.rust_eh_personality
	.weak	DW.ref.rust_eh_personality
	.section	.data.DW.ref.rust_eh_personality,"aGw",@progbits,DW.ref.rust_eh_personality,comdat
	.p2align	3
	.type	DW.ref.rust_eh_personality,@object
	.size	DW.ref.rust_eh_personality, 8
DW.ref.rust_eh_personality:
	.quad	rust_eh_personality
	.section	".note.GNU-stack","",@progbits

t.rs

use std::iter;

// CHECK-LABEL: @repeat_take_collect
#[no_mangle]
pub fn repeat_take_collect() -> Vec<u8> {
// CHECK: call void @llvm.memset.p0i8.i{{[0-9]+}}(i8* {{(nonnull )?}}align 1{{.*}} %{{[0-9]+}}, i8 42, i{{[0-9]+}} 100000, i1 false)
    iter::repeat(42).take(100000).collect()
}