#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 uint8_t;

/* Variables and functions */
int /*<<< orphan*/ printf(char *, ...);
void printbuf(uint8_t *buf, unsigned int count) {
  unsigned int idx = 0;
  while (idx < count) {
    idx += 1;
    printf("%02X ", buf[idx - 1]);
    if (idx % 16 == 0) {
      printf("\n");
    }
  }
  printf("\n");
}


x86 assembly (clang, -O0):
<printbuf>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
movl   $0x0,-0x10(%rbp)
mov    -0x10(%rbp),%eax
cmp    -0xc(%rbp),%eax
jae    117a <printbuf+0x6a>
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
mov    -0x8(%rbp),%rax
mov    -0x10(%rbp),%ecx
sub    $0x1,%ecx
mov    %ecx,%ecx
mov    (%rax,%rcx,4),%esi
lea    0xeaf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%eax
and    $0xf,%eax
cmp    $0x0,%eax
jne    1175 <printbuf+0x65>
lea    0xe98(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1126 <printbuf+0x16>
lea    0xe85(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<printbuf>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
test   %esi,%esi
je     1182 <printbuf+0x62>
mov    %rdi,%r15
mov    %esi,%r12d
neg    %r12
mov    $0x1,%ebx
lea    0xebf(%rip),%r14
jmp    1162 <printbuf+0x42>
cs nopw 0x0(%rax,%rax,1)
nopl   (%rax)
lea    (%r12,%rbx,1),%rax
add    $0x1,%rax
add    $0x1,%rbx
cmp    $0x1,%rax
je     1182 <printbuf+0x62>
mov    -0x4(%r15,%rbx,4),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
test   $0xf,%bl
jne    1150 <printbuf+0x30>
mov    $0xa,%edi
call   1030 <putchar@plt>
jmp    1150 <printbuf+0x30>
mov    $0xa,%edi
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
jmp    1030 <putchar@plt>

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

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