#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int /*<<< orphan*/ exit(int);
scalar_t__ link(char *, char *);
int /*<<< orphan*/ printf(char *);
scalar_t__ remove(char *);
int main(int argc, char **argv) {
  int fd;
  if (argc != 3) {
    printf("usage: remove_1 oldname newname\n");
    exit(1);
  }
  if (link(argv[1], argv[2]) < 0) {
    printf("link call error\n");
    exit(2);
  } else
    printf("step1 passed\n");
  if (remove(argv[1]) < 0) {
    printf("unlink error\n");
    remove(argv[2]);
    exit(3);
  } else
    printf("step2 passed\n");
  printf("success\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x3,-0x8(%rbp)
je     1176 <main+0x36>
lea    0xe99(%rip),%rdi
call   1040 <printf@plt>
mov    $0x1,%edi
call   1060 <exit@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rsi
call   1050 <link@plt>
cmp    $0x0,%rax
jge    11ab <main+0x6b>
lea    0xe85(%rip),%rdi
call   1040 <printf@plt>
mov    $0x2,%edi
call   1060 <exit@plt>
lea    0xe80(%rip),%rdi
call   1040 <printf@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1030 <remove@plt>
cmp    $0x0,%rax
jge    11f1 <main+0xb1>
lea    0xe6b(%rip),%rdi
call   1040 <printf@plt>
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rdi
call   1030 <remove@plt>
mov    $0x3,%edi
call   1060 <exit@plt>
lea    0xe56(%rip),%rdi
call   1040 <printf@plt>
lea    0xe58(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x3,%edi
jne    1191 <main+0x51>
mov    %rsi,%rbx
mov    0x8(%rsi),%rdi
mov    0x10(%rsi),%rsi
call   1050 <link@plt>
test   %rax,%rax
js     11a7 <main+0x67>
lea    0xe9e(%rip),%rdi
call   1040 <puts@plt>
mov    0x8(%rbx),%rdi
call   1030 <remove@plt>
test   %rax,%rax
js     11bd <main+0x7d>
lea    0xe91(%rip),%rdi
call   1040 <puts@plt>
lea    0xe92(%rip),%rdi
call   1040 <puts@plt>
xor    %eax,%eax
pop    %rbx
ret
lea    0xea7(%rip),%rdi
call   1040 <puts@plt>
mov    $0x1,%edi
call   1060 <exit@plt>
lea    0xe81(%rip),%rdi
call   1040 <puts@plt>
mov    $0x2,%edi
call   1060 <exit@plt>
lea    0xe5e(%rip),%rdi
call   1040 <puts@plt>
mov    0x10(%rbx),%rdi
call   1030 <remove@plt>
mov    $0x3,%edi
call   1060 <exit@plt>

LLVM IR (-O0):
@.str = [33 x i8] c"usage: remove_1 oldname newname\0A\00"
@.str.1 = [17 x i8] c"link call error\0A\00"
@.str.2 = [14 x i8] c"step1 passed\0A\00"
@.str.3 = [14 x i8] c"unlink error\0A\00"
@.str.4 = [14 x i8] c"step2 passed\0A\00"
@.str.5 = [9 x i8] c"success\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp ne i32 %7, 3
br i1 %8, label %9, label %12
9: ; preds = %2
%10 = call i32 @printf(i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str, i64 0, i64 0))
%11 = call i32 @exit(i32 1)
unreachable
12: ; preds = %2
%13 = load i8**, i8*** %5
%14 = getelementptr inbounds i8*, i8** %13, i64 1
%15 = load i8*, i8** %14
%16 = load i8**, i8*** %5
%17 = getelementptr inbounds i8*, i8** %16, i64 2
%18 = load i8*, i8** %17
%19 = call i64 @link(i8* %15, i8* %18)
%20 = icmp slt i64 %19, 0
br i1 %20, label %21, label %24
21: ; preds = %12
%22 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0))
%23 = call i32 @exit(i32 2)
unreachable
24: ; preds = %12
%25 = call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0))
br label %26
26: ; preds = %24
%27 = load i8**, i8*** %5
%28 = getelementptr inbounds i8*, i8** %27, i64 1
%29 = load i8*, i8** %28
%30 = call i64 @remove(i8* %29)
%31 = icmp slt i64 %30, 0
br i1 %31, label %32, label %39
32: ; preds = %26
%33 = call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.3, i64 0, i64 0))
%34 = load i8**, i8*** %5
%35 = getelementptr inbounds i8*, i8** %34, i64 2
%36 = load i8*, i8** %35
%37 = call i64 @remove(i8* %36)
%38 = call i32 @exit(i32 3)
unreachable
39: ; preds = %26
%40 = call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.4, i64 0, i64 0))
br label %41
41: ; preds = %39
%42 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.5, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@str = [13 x i8] c"step1 passed\00"
@str.6 = [13 x i8] c"step2 passed\00"
@str.7 = [8 x i8] c"success\00"
@str.8 = [13 x i8] c"unlink error\00"
@str.9 = [16 x i8] c"link call error\00"
@str.10 = [32 x i8] c"usage: remove_1 oldname newname\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 3
br i1 %3, label %7, label %4
4: ; preds = %2
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([32 x i8], [32 x i8]* @str.10, i64 0, i64 0))
%6 = tail call i32 @exit(i32 1)
unreachable
7: ; preds = %2
%8 = getelementptr inbounds i8*, i8** %1, i64 1
%9 = load i8*, i8** %8
%10 = getelementptr inbounds i8*, i8** %1, i64 2
%11 = load i8*, i8** %10
%12 = tail call i64 @link(i8* %9, i8* %11)
%13 = icmp slt i64 %12, 0
br i1 %13, label %14, label %17
14: ; preds = %7
%15 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @str.9, i64 0, i64 0))
%16 = tail call i32 @exit(i32 2)
unreachable
17: ; preds = %7
%18 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @str, i64 0, i64 0))
%19 = load i8*, i8** %8
%20 = tail call i64 @remove(i8* %19)
%21 = icmp slt i64 %20, 0
br i1 %21, label %22, label %27
22: ; preds = %17
%23 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @str.8, i64 0, i64 0))
%24 = load i8*, i8** %10
%25 = tail call i64 @remove(i8* %24)
%26 = tail call i32 @exit(i32 3)
unreachable
27: ; preds = %17
%28 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @str.6, i64 0, i64 0))
%29 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([8 x i8], [8 x i8]* @str.7, i64 0, i64 0))
ret i32 0
}