#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;
typedef size_t uint32_t;

/* Variables and functions */
int /*<<< orphan*/ printf(char *, ...);
void print_buff(uint8_t *buff, uint32_t len) {
  uint32_t i;
  uint32_t j = 0;
  for (i = 0; i < len; i++) {
    printf("%02X ", buff[i]);
    if (++j > 15) {
      j = 0;
      printf("\n");
    }
  }
  printf("\n");
}


x86 assembly (clang, -O0):
<print_buff>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
movq   $0x0,-0x20(%rbp)
movq   $0x0,-0x18(%rbp)
mov    -0x18(%rbp),%rax
cmp    -0x10(%rbp),%rax
jae    1199 <print_buff+0x89>
mov    -0x8(%rbp),%rax
mov    -0x18(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xeb0(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x20(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x20(%rbp)
cmp    $0xf,%rax
jbe    1183 <print_buff+0x73>
movq   $0x0,-0x20(%rbp)
lea    0xe8a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1188 <print_buff+0x78>
mov    -0x18(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x18(%rbp)
jmp    1130 <print_buff+0x20>
lea    0xe66(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_buff>:
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
test   %rsi,%rsi
je     1180 <print_buff+0x60>
mov    %rsi,%r12
mov    %rdi,%r14
lea    0xec5(%rip),%r15
xor    %r13d,%r13d
xor    %ebx,%ebx
jmp    1159 <print_buff+0x39>
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
add    $0x1,%rbx
cmp    %rbx,%r12
je     1180 <print_buff+0x60>
mov    (%r14,%rbx,4),%esi
mov    %r15,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
add    $0x1,%r13
cmp    $0x10,%r13
jb     1150 <print_buff+0x30>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %r13d,%r13d
jmp    1150 <print_buff+0x30>
mov    $0xa,%edi
pop    %rbx
pop    %r12
pop    %r13
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 @print_buff(i32* %0, i64 %1) {
%3 = alloca i32*
%4 = alloca i64
%5 = alloca i64
%6 = alloca i64
store i32* %0, i32** %3
store i64 %1, i64* %4
store i64 0, i64* %6
store i64 0, i64* %5
br label %7
7: ; preds = %23, %2
%8 = load i64, i64* %5
%9 = load i64, i64* %4
%10 = icmp ult i64 %8, %9
br i1 %10, label %11, label %26
11: ; preds = %7
%12 = load i32*, i32** %3
%13 = load i64, i64* %5
%14 = getelementptr inbounds i32, i32* %12, i64 %13
%15 = load i32, i32* %14
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32 %15)
%17 = load i64, i64* %6
%18 = add i64 %17, 1
store i64 %18, i64* %6
%19 = icmp ugt i64 %18, 15
br i1 %19, label %20, label %22
20: ; preds = %11
store i64 0, i64* %6
%21 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
br label %22
22: ; preds = %20, %11
br label %23
23: ; preds = %22
%24 = load i64, i64* %5
%25 = add i64 %24, 1
store i64 %25, i64* %5
br label %7
26: ; preds = %7
%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 @print_buff(i32* nocapture %0, i64 %1) {
%3 = icmp eq i64 %1, 0
br i1 %3, label %18, label %4
4: ; preds = %2, %14
%5 = phi i64 [ %15, %14 ], [ 0, %2 ]
%6 = phi i64 [ %16, %14 ], [ 0, %2 ]
%7 = getelementptr inbounds i32, i32* %0, i64 %6
%8 = load i32, i32* %7
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0), i32 %8)
%10 = add i64 %5, 1
%11 = icmp ugt i64 %10, 15
br i1 %11, label %12, label %14
12: ; preds = %4
%13 = tail call i32 @putchar(i32 10)
br label %14
14: ; preds = %4, %12
%15 = phi i64 [ 0, %12 ], [ %10, %4 ]
%16 = add nuw i64 %6, 1
%17 = icmp eq i64 %16, %1
br i1 %17, label %18, label %4
18: ; preds = %14, %2
%19 = tail call i32 @putchar(i32 10)
ret void
}