#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 */
typedef int useconds_t;

/* Variables and functions */
int atoi(char *);
int /*<<< orphan*/ printf(char *, char *);
int /*<<< orphan*/ usage(char *);
scalar_t__ usleep(int);
int main(int argc, char **argv) {
  useconds_t usec = 0;
  if (argc != 2) {
    usage(argv[0]);
    return 1;
  }
  if (0 > (usec = atoi(argv[1]))) {
    usage(argv[0]);
    return 1;
  }
  if (0 > usleep(1000 * usec)) {
    printf("%s: sleep error occured", argv[1]);
    return 2;
  }
  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)
movl   $0x0,-0x14(%rbp)
cmpl   $0x2,-0x8(%rbp)
je     117f <main+0x3f>
mov    -0x10(%rbp),%rax
mov    (%rax),%rdi
call   1040 <usage@plt>
movl   $0x1,-0x4(%rbp)
jmp    11f4 <main+0xb4>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1050 <atoi@plt>
mov    %eax,%ecx
mov    %ecx,-0x14(%rbp)
xor    %eax,%eax
cmp    %ecx,%eax
jle    11b3 <main+0x73>
mov    -0x10(%rbp),%rax
mov    (%rax),%rdi
call   1040 <usage@plt>
movl   $0x1,-0x4(%rbp)
jmp    11f4 <main+0xb4>
imul   $0x3e8,-0x14(%rbp),%edi
call   1060 <usleep@plt>
mov    %rax,%rcx
xor    %eax,%eax
cmp    %rcx,%rax
jle    11ed <main+0xad>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rsi
lea    0xe24(%rip),%rdi
call   1030 <printf@plt>
movl   $0x2,-0x4(%rbp)
jmp    11f4 <main+0xb4>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
mov    %rsi,%rbx
cmp    $0x2,%edi
jne    116d <main+0x2d>
mov    0x8(%rbx),%rdi
call   1050 <atoi@plt>
test   %eax,%eax
js     116d <main+0x2d>
imul   $0x3e8,%eax,%edi
call   1060 <usleep@plt>
mov    %rax,%rcx
xor    %eax,%eax
test   %rcx,%rcx
js     117c <main+0x3c>
pop    %rbx
ret
mov    (%rbx),%rdi
call   1040 <usage@plt>
mov    $0x1,%eax
pop    %rbx
ret
mov    0x8(%rbx),%rsi
lea    0xe79(%rip),%rdi
call   1030 <printf@plt>
mov    $0x2,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [24 x i8] c"%s: sleep error occured\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
store i32 0, i32* %6
%7 = load i32, i32* %4
%8 = icmp ne i32 %7, 2
br i1 %8, label %9, label %14
9: ; preds = %2
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 0
%12 = load i8*, i8** %11
%13 = call i32 @usage(i8* %12)
store i32 1, i32* %3
br label %36
14: ; preds = %2
%15 = load i8**, i8*** %5
%16 = getelementptr inbounds i8*, i8** %15, i64 1
%17 = load i8*, i8** %16
%18 = call i32 @atoi(i8* %17)
store i32 %18, i32* %6
%19 = icmp sgt i32 0, %18
br i1 %19, label %20, label %25
20: ; preds = %14
%21 = load i8**, i8*** %5
%22 = getelementptr inbounds i8*, i8** %21, i64 0
%23 = load i8*, i8** %22
%24 = call i32 @usage(i8* %23)
store i32 1, i32* %3
br label %36
25: ; preds = %14
%26 = load i32, i32* %6
%27 = mul nsw i32 1000, %26
%28 = call i64 @usleep(i32 %27)
%29 = icmp sgt i64 0, %28
br i1 %29, label %30, label %35
30: ; preds = %25
%31 = load i8**, i8*** %5
%32 = getelementptr inbounds i8*, i8** %31, i64 1
%33 = load i8*, i8** %32
%34 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str, i64 0, i64 0), i8* %33)
store i32 2, i32* %3
br label %36
35: ; preds = %25
store i32 0, i32* %3
br label %36
36: ; preds = %35, %30, %20, %9
%37 = load i32, i32* %3
ret i32 %37
}

LLVM IR (-O2):
@.str = [24 x i8] c"%s: sleep error occured\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %7, label %4
4: ; preds = %2
%5 = load i8*, i8** %1
%6 = tail call i32 @usage(i8* %5)
br label %22
7: ; preds = %2
%8 = getelementptr inbounds i8*, i8** %1, i64 1
%9 = load i8*, i8** %8
%10 = tail call i32 @atoi(i8* %9)
%11 = icmp slt i32 %10, 0
br i1 %11, label %12, label %15
12: ; preds = %7
%13 = load i8*, i8** %1
%14 = tail call i32 @usage(i8* %13)
br label %22
15: ; preds = %7
%16 = mul nsw i32 %10, 1000
%17 = tail call i64 @usleep(i32 %16)
%18 = icmp slt i64 %17, 0
br i1 %18, label %19, label %22
19: ; preds = %15
%20 = load i8*, i8** %8
%21 = tail call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str, i64 0, i64 0), i8* %20)
br label %22
22: ; preds = %15, %19, %12, %4
%23 = phi i32 [ 1, %4 ], [ 1, %12 ], [ 2, %19 ], [ 0, %15 ]
ret i32 %23
}