#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*/ printf(char *, ...);
void print_hexdump(const char *hexbin, int len) {
  int i;
  const char *p;
  p = hexbin;
  for (i = 0; i < len; i++) {
    if (i != 0 && i % 32 == 0) {
      printf("\n");
    }
    if ((i % 8) == 0) {
      printf(" ");
    }
    printf("%02x", (unsigned char)*p);
    p++;
  }
  printf("\n");
  return;
}


x86 assembly (clang, -O0):
<print_hexdump>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
mov    -0x8(%rbp),%rax
mov    %rax,-0x18(%rbp)
movl   $0x0,-0x10(%rbp)
mov    -0x10(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    11b7 <print_hexdump+0xa7>
cmpl   $0x0,-0x10(%rbp)
je     1166 <print_hexdump+0x56>
mov    -0x10(%rbp),%eax
mov    $0x20,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    1166 <print_hexdump+0x56>
lea    0xea1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%eax
mov    $0x8,%ecx
cltd
idiv   %ecx
cmp    $0x0,%edx
jne    1188 <print_hexdump+0x78>
lea    0xe81(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x18(%rbp),%rax
movzbl (%rax),%esi
lea    0xe6e(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x18(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x18(%rbp)
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    112e <print_hexdump+0x1e>
lea    0xe42(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_hexdump>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
test   %esi,%esi
jle    117e <print_hexdump+0x5e>
mov    %rdi,%r15
mov    %esi,%r12d
lea    0xec7(%rip),%r14
xor    %ebx,%ebx
jmp    1158 <print_hexdump+0x38>
nopl   (%rax)
movzbl (%r15,%rbx,1),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
add    $0x1,%rbx
cmp    %ebx,%r12d
je     117e <print_hexdump+0x5e>
test   %ebx,%ebx
je     116d <print_hexdump+0x4d>
mov    %ebx,%eax
and    $0x1f,%eax
jne    116d <print_hexdump+0x4d>
mov    $0xa,%edi
call   1030 <putchar@plt>
test   $0x7,%bl
jne    1140 <print_hexdump+0x20>
mov    $0x20,%edi
call   1030 <putchar@plt>
jmp    1140 <print_hexdump+0x20>
mov    $0xa,%edi
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
jmp    1030 <putchar@plt>

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

LLVM IR (-O2):
@.str.2 = [5 x i8] c"%02x\00"
define void @print_hexdump(i8* nocapture %0, i32 %1) {
%3 = icmp sgt i32 %1, 0
br i1 %3, label %4, label %25
4: ; preds = %2, %18
%5 = phi i8* [ %22, %18 ], [ %0, %2 ]
%6 = phi i32 [ %23, %18 ], [ 0, %2 ]
%7 = icmp ne i32 %6, 0
%8 = and i32 %6, 31
%9 = icmp eq i32 %8, 0
%10 = and i1 %7, %9
br i1 %10, label %11, label %13
11: ; preds = %4
%12 = tail call i32 @putchar(i32 10)
br label %13
13: ; preds = %11, %4
%14 = and i32 %6, 7
%15 = icmp eq i32 %14, 0
br i1 %15, label %16, label %18
16: ; preds = %13
%17 = tail call i32 @putchar(i32 32)
br label %18
18: ; preds = %16, %13
%19 = load i8, i8* %5
%20 = zext i8 %19 to i32
%21 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i32 %20)
%22 = getelementptr inbounds i8, i8* %5, i64 1
%23 = add nuw nsw i32 %6, 1
%24 = icmp eq i32 %23, %1
br i1 %24, label %25, label %4
25: ; preds = %18, %2
%26 = tail call i32 @putchar(i32 10)
ret void
}