#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 memdump(void *virtual_address, int byte_count) {
  char *p = virtual_address;
  int offset;
  for (offset = 0; offset < byte_count; offset++) {
    printf("%02x", p[offset]);
    if (offset % 4 == 3) {
      printf(" ");
    }
  }
  printf("\n");
}


x86 assembly (clang, -O0):
<memdump>:
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,-0x1c(%rbp)
mov    -0x1c(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    1189 <memdump+0x79>
mov    -0x18(%rbp),%rax
movslq -0x1c(%rbp),%rcx
movsbl (%rax,%rcx,1),%esi
lea    0xeb3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x1c(%rbp),%eax
mov    $0x4,%ecx
cltd
idiv   %ecx
cmp    $0x3,%edx
jne    1176 <memdump+0x66>
lea    0xe96(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    117b <memdump+0x6b>
mov    -0x1c(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x1c(%rbp)
jmp    112e <memdump+0x1e>
lea    0xe77(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<memdump>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
test   %esi,%esi
jle    116c <memdump+0x4c>
mov    %rdi,%r15
mov    %esi,%r12d
lea    0xec7(%rip),%r14
xor    %ebx,%ebx
jmp    1149 <memdump+0x29>
nopl   (%rax)
add    $0x1,%rbx
cmp    %rbx,%r12
je     116c <memdump+0x4c>
movsbl (%r15,%rbx,1),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %ebx,%eax
not    %eax
test   $0x3,%al
jne    1140 <memdump+0x20>
mov    $0x20,%edi
call   1030 <putchar@plt>
jmp    1140 <memdump+0x20>
mov    $0xa,%edi
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
jmp    1030 <putchar@plt>

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

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