#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 dump_data(unsigned char *buf, unsigned long len) {
  unsigned long i;
  printf("\nDump data at %p:\n", buf);
  for (i = 0; i < len;) {
    printf("0x%02x, ", buf[i]);
    i++;
    if ((i % 16) == 0)
      printf("\n");
  }
  printf("\n");
}


x86 assembly (clang, -O0):
<dump_data>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x8(%rbp),%rsi
lea    0xed5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movq   $0x0,-0x18(%rbp)
mov    -0x18(%rbp),%rax
cmp    -0x10(%rbp),%rax
jae    1193 <dump_data+0x83>
mov    -0x8(%rbp),%rax
mov    -0x18(%rbp),%rcx
movzbl (%rax,%rcx,1),%esi
lea    0xeb8(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x18(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rax
and    $0xf,%rax
cmp    $0x0,%rax
jne    118e <dump_data+0x7e>
lea    0xe8a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    113a <dump_data+0x2a>
lea    0xe77(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<dump_data>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
mov    %rsi,%r12
mov    %rdi,%r14
lea    0xecb(%rip),%rdi
mov    %r14,%rsi
xor    %eax,%eax
call   1040 <printf@plt>
test   %r12,%r12
je     1193 <dump_data+0x73>
neg    %r12
mov    $0x1,%ebx
lea    0xec0(%rip),%r15
jmp    1172 <dump_data+0x52>
cs nopw 0x0(%rax,%rax,1)
nop
lea    (%r12,%rbx,1),%rax
add    $0x1,%rax
add    $0x1,%rbx
cmp    $0x1,%rax
je     1193 <dump_data+0x73>
movzbl -0x1(%r14,%rbx,1),%esi
mov    %r15,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
test   $0xf,%bl
jne    1160 <dump_data+0x40>
mov    $0xa,%edi
call   1030 <putchar@plt>
jmp    1160 <dump_data+0x40>
mov    $0xa,%edi
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
jmp    1030 <putchar@plt>

LLVM IR (-O0):
@.str = [19 x i8] c"\0ADump data at %p:\0A\00"
@.str.1 = [9 x i8] c"0x%02x, \00"
@.str.2 = [2 x i8] c"\0A\00"
define void @dump_data(i8* %0, i64 %1) {
%3 = alloca i8*
%4 = alloca i64
%5 = alloca i64
store i8* %0, i8** %3
store i64 %1, i64* %4
%6 = load i8*, i8** %3
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0), i8* %6)
store i64 0, i64* %5
br label %8
8: ; preds = %26, %2
%9 = load i64, i64* %5
%10 = load i64, i64* %4
%11 = icmp ult i64 %9, %10
br i1 %11, label %12, label %27
12: ; preds = %8
%13 = load i8*, i8** %3
%14 = load i64, i64* %5
%15 = getelementptr inbounds i8, i8* %13, i64 %14
%16 = load i8, i8* %15
%17 = zext i8 %16 to i32
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i32 %17)
%19 = load i64, i64* %5
%20 = add i64 %19, 1
store i64 %20, i64* %5
%21 = load i64, i64* %5
%22 = urem i64 %21, 16
%23 = icmp eq i64 %22, 0
br i1 %23, label %24, label %26
24: ; preds = %12
%25 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
br label %26
26: ; preds = %24, %12
br label %8
27: ; preds = %8
%28 = 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 = [19 x i8] c"\0ADump data at %p:\0A\00"
@.str.1 = [9 x i8] c"0x%02x, \00"
define void @dump_data(i8* %0, i64 %1) {
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0), i8* %0)
%4 = icmp eq i64 %1, 0
br i1 %4, label %18, label %5
5: ; preds = %2, %16
%6 = phi i64 [ %11, %16 ], [ 0, %2 ]
%7 = getelementptr inbounds i8, i8* %0, i64 %6
%8 = load i8, i8* %7
%9 = zext i8 %8 to i32
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i32 %9)
%11 = add nuw i64 %6, 1
%12 = and i64 %11, 15
%13 = icmp eq i64 %12, 0
br i1 %13, label %14, label %16
14: ; preds = %5
%15 = tail call i32 @putchar(i32 10)
br label %16
16: ; preds = %14, %5
%17 = icmp eq i64 %11, %1
br i1 %17, label %18, label %5
18: ; preds = %16, %2
%19 = tail call i32 @putchar(i32 10)
ret void
}