#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 *, ...);
int /*<<< orphan*/ stderr;
void usage(char *prog_name) {
  fprintf(stderr, "Usage:%s -h -n -p -s\n", prog_name);
  fprintf(stderr, "-h          print help info\n");
  fprintf(stderr, "-n          null pointer\n");
  fprintf(stderr, "-p          panic\n");
  fprintf(stderr, "-s          spinlock hang\n");
  fprintf(stderr, "-a          kernel stack overflow\n");
  fprintf(stderr, "-m          kernel thread null pointer\n");
  fprintf(stderr, "-g          general protection\n");
}


x86 assembly (clang, -O0):
<usage>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    0x2ebd(%rip),%rax
mov    (%rax),%edi
mov    -0x8(%rbp),%rdx
lea    0xed0(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
mov    0x2ea2(%rip),%rax
mov    (%rax),%edi
lea    0xecf(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
mov    0x2e8b(%rip),%rax
mov    (%rax),%edi
lea    0xed5(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
mov    0x2e74(%rip),%rax
mov    (%rax),%edi
lea    0xed8(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
mov    0x2e5d(%rip),%rax
mov    (%rax),%edi
lea    0xed4(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
mov    0x2e46(%rip),%rax
mov    (%rax),%edi
lea    0xed8(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
mov    0x2e2f(%rip),%rax
mov    (%rax),%edi
lea    0xee4(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
mov    0x2e18(%rip),%rax
mov    (%rax),%edi
lea    0xef5(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<usage>:
push   %rbx
mov    %rdi,%rdx
mov    0x2ec5(%rip),%rbx
mov    (%rbx),%edi
lea    0xedc(%rip),%rsi
xor    %eax,%eax
call   1030 <fprintf@plt>
mov    (%rbx),%edi
lea    0xee2(%rip),%rsi
xor    %eax,%eax
call   1030 <fprintf@plt>
mov    (%rbx),%edi
lea    0xeef(%rip),%rsi
xor    %eax,%eax
call   1030 <fprintf@plt>
mov    (%rbx),%edi
lea    0xef9(%rip),%rsi
xor    %eax,%eax
call   1030 <fprintf@plt>
mov    (%rbx),%edi
lea    0xefc(%rip),%rsi
xor    %eax,%eax
call   1030 <fprintf@plt>
mov    (%rbx),%edi
lea    0xf07(%rip),%rsi
xor    %eax,%eax
call   1030 <fprintf@plt>
mov    (%rbx),%edi
lea    0xf1a(%rip),%rsi
xor    %eax,%eax
call   1030 <fprintf@plt>
mov    (%rbx),%edi
lea    0xf32(%rip),%rsi
xor    %eax,%eax
pop    %rbx
jmp    1030 <fprintf@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [22 x i8] c"Usage:%s -h -n -p -s\0A\00"
@.str.1 = [29 x i8] c"-h print help info\0A\00"
@.str.2 = [26 x i8] c"-n null pointer\0A\00"
@.str.3 = [19 x i8] c"-p panic\0A\00"
@.str.4 = [27 x i8] c"-s spinlock hang\0A\00"
@.str.5 = [35 x i8] c"-a kernel stack overflow\0A\00"
@.str.6 = [40 x i8] c"-m kernel thread null pointer\0A\00"
@.str.7 = [32 x i8] c"-g general protection\0A\00"
define void @usage(i8* %0) {
%2 = alloca i8*
store i8* %0, i8** %2
%3 = load i32, i32* @stderr
%4 = load i8*, i8** %2
%5 = call i32 (i32, i8*, ...) @fprintf(i32 %3, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), i8* %4)
%6 = load i32, i32* @stderr
%7 = call i32 (i32, i8*, ...) @fprintf(i32 %6, i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.1, i64 0, i64 0))
%8 = load i32, i32* @stderr
%9 = call i32 (i32, i8*, ...) @fprintf(i32 %8, i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0))
%10 = load i32, i32* @stderr
%11 = call i32 (i32, i8*, ...) @fprintf(i32 %10, i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0))
%12 = load i32, i32* @stderr
%13 = call i32 (i32, i8*, ...) @fprintf(i32 %12, i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.4, i64 0, i64 0))
%14 = load i32, i32* @stderr
%15 = call i32 (i32, i8*, ...) @fprintf(i32 %14, i8* getelementptr inbounds ([35 x i8], [35 x i8]* @.str.5, i64 0, i64 0))
%16 = load i32, i32* @stderr
%17 = call i32 (i32, i8*, ...) @fprintf(i32 %16, i8* getelementptr inbounds ([40 x i8], [40 x i8]* @.str.6, i64 0, i64 0))
%18 = load i32, i32* @stderr
%19 = call i32 (i32, i8*, ...) @fprintf(i32 %18, i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.7, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [22 x i8] c"Usage:%s -h -n -p -s\0A\00"
@.str.1 = [29 x i8] c"-h print help info\0A\00"
@.str.2 = [26 x i8] c"-n null pointer\0A\00"
@.str.3 = [19 x i8] c"-p panic\0A\00"
@.str.4 = [27 x i8] c"-s spinlock hang\0A\00"
@.str.5 = [35 x i8] c"-a kernel stack overflow\0A\00"
@.str.6 = [40 x i8] c"-m kernel thread null pointer\0A\00"
@.str.7 = [32 x i8] c"-g general protection\0A\00"
define void @usage(i8* %0) {
%2 = load i32, i32* @stderr
%3 = tail call i32 (i32, i8*, ...) @fprintf(i32 %2, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), i8* %0)
%4 = load i32, i32* @stderr
%5 = tail call i32 (i32, i8*, ...) @fprintf(i32 %4, i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.1, i64 0, i64 0))
%6 = load i32, i32* @stderr
%7 = tail call i32 (i32, i8*, ...) @fprintf(i32 %6, i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0))
%8 = load i32, i32* @stderr
%9 = tail call i32 (i32, i8*, ...) @fprintf(i32 %8, i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0))
%10 = load i32, i32* @stderr
%11 = tail call i32 (i32, i8*, ...) @fprintf(i32 %10, i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.4, i64 0, i64 0))
%12 = load i32, i32* @stderr
%13 = tail call i32 (i32, i8*, ...) @fprintf(i32 %12, i8* getelementptr inbounds ([35 x i8], [35 x i8]* @.str.5, i64 0, i64 0))
%14 = load i32, i32* @stderr
%15 = tail call i32 (i32, i8*, ...) @fprintf(i32 %14, i8* getelementptr inbounds ([40 x i8], [40 x i8]* @.str.6, i64 0, i64 0))
%16 = load i32, i32* @stderr
%17 = tail call i32 (i32, i8*, ...) @fprintf(i32 %16, i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.7, i64 0, i64 0))
ret void
}