#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 *, unsigned char, char);
void HEXDUMP(unsigned len, unsigned char *data) {
  unsigned i;
  for (i = 0; i < len; i++)
    printf("%02X%c", *(data + i), ((i + 1) % 16) ? ' ' : '\n');
}


x86 assembly (clang, -O0):
<HEXDUMP>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
mov    %rsi,-0x10(%rbp)
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x4(%rbp),%eax
jae    1175 <HEXDUMP+0x65>
mov    -0x10(%rbp),%rax
mov    -0x14(%rbp),%ecx
mov    (%rax,%rcx,1),%cl
mov    -0x14(%rbp),%esi
add    $0x1,%esi
and    $0xf,%esi
mov    $0xa,%eax
mov    $0x20,%edx
cmp    $0x0,%esi
cmovne %edx,%eax
lea    0xea4(%rip),%rdi
movzbl %cl,%esi
movsbl %al,%edx
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1126 <HEXDUMP+0x16>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<HEXDUMP>:
push   %rbp
push   %r15
push   %r14
push   %r12
push   %rbx
test   %edi,%edi
je     116b <HEXDUMP+0x5b>
mov    %rsi,%r15
mov    %edi,%r12d
neg    %r12
mov    $0x1,%ebx
mov    $0xa,%ebp
lea    0xeca(%rip),%r14
cs nopw 0x0(%rax,%rax,1)
movzbl -0x1(%r15,%rbx,1),%esi
test   $0xf,%bl
mov    $0x20,%edx
cmove  %ebp,%edx
mov    %r14,%rdi
call   1030 <printf@plt>
lea    (%r12,%rbx,1),%rax
add    $0x1,%rax
add    $0x1,%rbx
cmp    $0x1,%rax
jne    1140 <HEXDUMP+0x30>
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [7 x i8] c"%02X%c\00"
define void @HEXDUMP(i32 %0, i8* %1) {
%3 = alloca i32
%4 = alloca i8*
%5 = alloca i32
store i32 %0, i32* %3
store i8* %1, i8** %4
store i32 0, i32* %5
br label %6
6: ; preds = %24, %2
%7 = load i32, i32* %5
%8 = load i32, i32* %3
%9 = icmp ult i32 %7, %8
br i1 %9, label %10, label %27
10: ; preds = %6
%11 = load i8*, i8** %4
%12 = load i32, i32* %5
%13 = zext i32 %12 to i64
%14 = getelementptr inbounds i8, i8* %11, i64 %13
%15 = load i8, i8* %14
%16 = load i32, i32* %5
%17 = add i32 %16, 1
%18 = urem i32 %17, 16
%19 = icmp ne i32 %18, 0
%20 = zext i1 %19 to i64
%21 = select i1 %19, i32 32, i32 10
%22 = trunc i32 %21 to i8
%23 = call i32 @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0), i8 zeroext %15, i8 signext %22)
br label %24
24: ; preds = %10
%25 = load i32, i32* %5
%26 = add i32 %25, 1
store i32 %26, i32* %5
br label %6
27: ; preds = %6
ret void
}

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