#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*/ fprintf(int /*<<< orphan*/, char *, char const *);
int /*<<< orphan*/ perror(char *);
scalar_t__ pivot_root(char const *, char const *);
int /*<<< orphan*/ stderr;
int main(int argc, const char **argv) {
  if (argc != 3) {
    fprintf(stderr, "Usage: %s new_root put_old\n", argv[0]);
    return 1;
  }
  if (pivot_root(argv[1], argv[2]) < 0) {
    perror("pivot_root");
    return 1;
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x3,-0x8(%rbp)
je     1178 <main+0x48>
mov    0x2e89(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xe99(%rip),%rsi
call   1030 <fprintf@plt>
movl   $0x1,-0x4(%rbp)
jmp    11b6 <main+0x86>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rsi
call   1050 <pivot_root@plt>
cmp    $0x0,%rax
jge    11af <main+0x7f>
lea    0xe7e(%rip),%rdi
call   1040 <perror@plt>
movl   $0x1,-0x4(%rbp)
jmp    11b6 <main+0x86>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
cmp    $0x3,%edi
jne    114f <main+0x1f>
mov    0x8(%rsi),%rdi
mov    0x10(%rsi),%rsi
call   1050 <pivot_root@plt>
mov    %rax,%rcx
xor    %eax,%eax
test   %rcx,%rcx
js     116e <main+0x3e>
pop    %rcx
ret
mov    0x2e8a(%rip),%rax
mov    (%rax),%edi
mov    (%rsi),%rdx
lea    0xe9e(%rip),%rsi
call   1030 <fprintf@plt>
mov    $0x1,%eax
pop    %rcx
ret
lea    0xea7(%rip),%rdi
call   1040 <perror@plt>
jmp    1167 <main+0x37>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [28 x i8] c"Usage: %s new_root put_old\0A\00"
@.str.1 = [11 x i8] c"pivot_root\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%6 = load i32, i32* %4
%7 = icmp ne i32 %6, 3
br i1 %7, label %8, label %14
8: ; preds = %2
%9 = load i32, i32* @stderr
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 0
%12 = load i8*, i8** %11
%13 = call i32 @fprintf(i32 %9, i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str, i64 0, i64 0), i8* %12)
store i32 1, i32* %3
br label %26
14: ; preds = %2
%15 = load i8**, i8*** %5
%16 = getelementptr inbounds i8*, i8** %15, i64 1
%17 = load i8*, i8** %16
%18 = load i8**, i8*** %5
%19 = getelementptr inbounds i8*, i8** %18, i64 2
%20 = load i8*, i8** %19
%21 = call i64 @pivot_root(i8* %17, i8* %20)
%22 = icmp slt i64 %21, 0
br i1 %22, label %23, label %25
23: ; preds = %14
%24 = call i32 @perror(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0))
store i32 1, i32* %3
br label %26
25: ; preds = %14
store i32 0, i32* %3
br label %26
26: ; preds = %25, %23, %8
%27 = load i32, i32* %3
ret i32 %27
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [28 x i8] c"Usage: %s new_root put_old\0A\00"
@.str.1 = [11 x i8] c"pivot_root\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 3
br i1 %3, label %8, label %4
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = load i8*, i8** %1
%7 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str, i64 0, i64 0), i8* %6)
br label %17
8: ; preds = %2
%9 = getelementptr inbounds i8*, i8** %1, i64 1
%10 = load i8*, i8** %9
%11 = getelementptr inbounds i8*, i8** %1, i64 2
%12 = load i8*, i8** %11
%13 = tail call i64 @pivot_root(i8* %10, i8* %12)
%14 = icmp slt i64 %13, 0
br i1 %14, label %15, label %17
15: ; preds = %8
%16 = tail call i32 @perror(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0))
br label %17
17: ; preds = %8, %15, %4
%18 = phi i32 [ 1, %4 ], [ 1, %15 ], [ 0, %8 ]
ret i32 %18
}