#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 /*<<< orphan*/ FILE;

/* Variables and functions */
int /*<<< orphan*/ fprintf(int /*<<< orphan*/ *, char *, ...);
void hexdump(FILE *f, const char *title, const unsigned char *s, int l) {
  int n = 0;
  fprintf(f, "%s", title);
  for (; n < l; ++n) {
    if ((n % 16) == 0)
      fprintf(f, "\n%04x", n);
    fprintf(f, " %02x", s[n]);
  }
  fprintf(f, "\n");
}


x86 assembly (clang, -O0):
<hexdump>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %rdx,-0x18(%rbp)
mov    %ecx,-0x1c(%rbp)
movl   $0x0,-0x20(%rbp)
mov    -0x8(%rbp),%rdi
mov    -0x10(%rbp),%rdx
lea    0xec3(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
mov    -0x20(%rbp),%eax
cmp    -0x1c(%rbp),%eax
jge    11a5 <hexdump+0x95>
mov    -0x20(%rbp),%eax
mov    $0x10,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    1179 <hexdump+0x69>
mov    -0x8(%rbp),%rdi
mov    -0x20(%rbp),%edx
lea    0xe91(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
mov    -0x8(%rbp),%rdi
mov    -0x18(%rbp),%rax
movslq -0x20(%rbp),%rcx
movzbl (%rax,%rcx,1),%edx
lea    0xe79(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
mov    -0x20(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x20(%rbp)
jmp    1144 <hexdump+0x34>
mov    -0x8(%rbp),%rdi
lea    0xe5f(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<hexdump>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
push   %rax
mov    %ecx,%ebx
mov    %rdx,%r14
mov    %rdi,%r13
mov    %rsi,%rdi
mov    %r13,%rsi
call   1030 <fputs@plt>
test   %ebx,%ebx
jle    11a1 <hexdump+0x71>
mov    %ebx,%ebp
lea    0xea5(%rip),%r15
lea    0xea4(%rip),%r12
xor    %ebx,%ebx
jmp    118b <hexdump+0x5b>
cs nopw 0x0(%rax,%rax,1)
movzbl (%r14,%rbx,1),%edx
mov    %r13,%rdi
mov    %r12,%rsi
xor    %eax,%eax
call   1050 <fprintf@plt>
add    $0x1,%rbx
cmp    %rbx,%rbp
je     11a1 <hexdump+0x71>
test   $0xf,%bl
jne    1170 <hexdump+0x40>
mov    %r13,%rdi
mov    %r15,%rsi
mov    %ebx,%edx
xor    %eax,%eax
call   1050 <fprintf@plt>
jmp    1170 <hexdump+0x40>
mov    $0xa,%edi
mov    %r13,%rsi
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
jmp    1040 <fputc@plt>

LLVM IR (-O0):
@.str = [3 x i8] c"%s\00"
@.str.1 = [6 x i8] c"\0A%04x\00"
@.str.2 = [6 x i8] c" %02x\00"
@.str.3 = [2 x i8] c"\0A\00"
define void @hexdump(i32* %0, i8* %1, i8* %2, i32 %3) {
%5 = alloca i32*
%6 = alloca i8*
%7 = alloca i8*
%8 = alloca i32
%9 = alloca i32
store i32* %0, i32** %5
store i8* %1, i8** %6
store i8* %2, i8** %7
store i32 %3, i32* %8
store i32 0, i32* %9
%10 = load i32*, i32** %5
%11 = load i8*, i8** %6
%12 = call i32 (i32*, i8*, ...) @fprintf(i32* %10, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* %11)
br label %13
13: ; preds = %34, %4
%14 = load i32, i32* %9
%15 = load i32, i32* %8
%16 = icmp slt i32 %14, %15
br i1 %16, label %17, label %37
17: ; preds = %13
%18 = load i32, i32* %9
%19 = srem i32 %18, 16
%20 = icmp eq i32 %19, 0
br i1 %20, label %21, label %25
21: ; preds = %17
%22 = load i32*, i32** %5
%23 = load i32, i32* %9
%24 = call i32 (i32*, i8*, ...) @fprintf(i32* %22, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %23)
br label %25
25: ; preds = %21, %17
%26 = load i32*, i32** %5
%27 = load i8*, i8** %7
%28 = load i32, i32* %9
%29 = sext i32 %28 to i64
%30 = getelementptr inbounds i8, i8* %27, i64 %29
%31 = load i8, i8* %30
%32 = zext i8 %31 to i32
%33 = call i32 (i32*, i8*, ...) @fprintf(i32* %26, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %32)
br label %34
34: ; preds = %25
%35 = load i32, i32* %9
%36 = add nsw i32 %35, 1
store i32 %36, i32* %9
br label %13
37: ; preds = %13
%38 = load i32*, i32** %5
%39 = call i32 (i32*, i8*, ...) @fprintf(i32* %38, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@.str.1 = [6 x i8] c"\0A%04x\00"
@.str.2 = [6 x i8] c" %02x\00"
define void @hexdump(i32* nocapture %0, i8* nocapture %1, i8* nocapture %2, i32 %3) {
%5 = tail call i32 @fputs(i8* %1, i32* %0)
%6 = icmp sgt i32 %3, 0
br i1 %6, label %7, label %23
7: ; preds = %4
%8 = zext i32 %3 to i64
br label %9
9: ; preds = %7, %16
%10 = phi i64 [ 0, %7 ], [ %21, %16 ]
%11 = trunc i64 %10 to i32
%12 = and i32 %11, 15
%13 = icmp eq i32 %12, 0
br i1 %13, label %14, label %16
14: ; preds = %9
%15 = tail call i32 (i32*, i8*, ...) @fprintf(i32* %0, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %11)
br label %16
16: ; preds = %14, %9
%17 = getelementptr inbounds i8, i8* %2, i64 %10
%18 = load i8, i8* %17
%19 = zext i8 %18 to i32
%20 = tail call i32 (i32*, i8*, ...) @fprintf(i32* %0, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %19)
%21 = add nuw nsw i64 %10, 1
%22 = icmp eq i64 %21, %8
br i1 %22, label %23, label %9
23: ; preds = %16, %4
%24 = tail call i32 @fputc(i32 10, i32* %0)
ret void
}