#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 *, ...);
int print_hex(uint8_t *buf, int len) {
  int i;
  int n;
  for (i = 0, n = 0; i < len; i++) {
    if (n > 7) {
      printf("\n");
      n = 0;
    }
    printf("0x%02x, ", buf[i]);
    n++;
  }
  printf("\n");
  return (0);
}


x86 assembly (clang, -O0):
<print_hex>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
movl   $0x0,-0x10(%rbp)
movl   $0x0,-0x14(%rbp)
mov    -0x10(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    1188 <print_hex+0x78>
cmpl   $0x7,-0x14(%rbp)
jle    1158 <print_hex+0x48>
lea    0xeb6(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x14(%rbp)
mov    -0x8(%rbp),%rax
movslq -0x10(%rbp),%rcx
mov    (%rax,%rcx,4),%esi
lea    0xe98(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    112d <print_hex+0x1d>
lea    0xe71(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_hex>:
push   %rbp
push   %r15
push   %r14
push   %r12
push   %rbx
test   %esi,%esi
jle    116d <print_hex+0x4d>
mov    %rdi,%r15
mov    %esi,%r12d
lea    0xec7(%rip),%r14
xor    %ebx,%ebx
xor    %ebp,%ebp
jmp    115a <print_hex+0x3a>
nop
mov    (%r15,%rbx,4),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
add    $0x1,%ebp
add    $0x1,%rbx
cmp    %rbx,%r12
je     116d <print_hex+0x4d>
cmp    $0x8,%ebp
jl     1140 <print_hex+0x20>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %ebp,%ebp
jmp    1140 <print_hex+0x20>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
ret

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

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