#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 print_buf(unsigned char *buf, unsigned int length, char *name) {
  printf("%s: ", name);
  int display_counter = 0;
  for (display_counter = 0; display_counter < length; display_counter++) {
    printf("%2x ", buf[display_counter]);
    if (display_counter % 8 == 7)
      printf("\n");
  }
  printf("\n");
}


x86 assembly (clang, -O0):
<print_buf>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
mov    %rdx,-0x18(%rbp)
mov    -0x18(%rbp),%rsi
lea    0xed2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x1c(%rbp)
movl   $0x0,-0x1c(%rbp)
mov    -0x1c(%rbp),%eax
cmp    -0xc(%rbp),%eax
jae    119e <print_buf+0x8e>
mov    -0x8(%rbp),%rax
movslq -0x1c(%rbp),%rcx
movzbl (%rax,%rcx,1),%esi
lea    0xea3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x1c(%rbp),%eax
mov    $0x8,%ecx
cltd
idiv   %ecx
cmp    $0x7,%edx
jne    118b <print_buf+0x7b>
lea    0xe86(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1190 <print_buf+0x80>
mov    -0x1c(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x1c(%rbp)
jmp    1143 <print_buf+0x33>
lea    0xe65(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_buf>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %esi,%ebp
mov    %rdi,%r15
lea    0xecd(%rip),%rdi
mov    %rdx,%rsi
xor    %eax,%eax
call   1040 <printf@plt>
test   %ebp,%ebp
je     117c <print_buf+0x5c>
mov    %ebp,%ebp
lea    0xebb(%rip),%r14
xor    %ebx,%ebx
jmp    1159 <print_buf+0x39>
xchg   %ax,%ax
add    $0x1,%rbx
cmp    %rbx,%rbp
je     117c <print_buf+0x5c>
movzbl (%r15,%rbx,1),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %ebx,%eax
not    %eax
test   $0x7,%al
jne    1150 <print_buf+0x30>
mov    $0xa,%edi
call   1030 <putchar@plt>
jmp    1150 <print_buf+0x30>
mov    $0xa,%edi
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
jmp    1030 <putchar@plt>

LLVM IR (-O0):
@.str = [5 x i8] c"%s: \00"
@.str.1 = [5 x i8] c"%2x \00"
@.str.2 = [2 x i8] c"\0A\00"
define void @print_buf(i8* %0, i32 %1, i8* %2) {
%4 = alloca i8*
%5 = alloca i32
%6 = alloca i8*
%7 = alloca i32
store i8* %0, i8** %4
store i32 %1, i32* %5
store i8* %2, i8** %6
%8 = load i8*, i8** %6
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* %8)
store i32 0, i32* %7
store i32 0, i32* %7
br label %10
10: ; preds = %28, %3
%11 = load i32, i32* %7
%12 = load i32, i32* %5
%13 = icmp ult i32 %11, %12
br i1 %13, label %14, label %31
14: ; preds = %10
%15 = load i8*, i8** %4
%16 = load i32, i32* %7
%17 = sext i32 %16 to i64
%18 = getelementptr inbounds i8, i8* %15, i64 %17
%19 = load i8, i8* %18
%20 = zext i8 %19 to i32
%21 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %20)
%22 = load i32, i32* %7
%23 = srem i32 %22, 8
%24 = icmp eq i32 %23, 7
br i1 %24, label %25, label %27
25: ; preds = %14
%26 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
br label %27
27: ; preds = %25, %14
br label %28
28: ; preds = %27
%29 = load i32, i32* %7
%30 = add nsw i32 %29, 1
store i32 %30, i32* %7
br label %10
31: ; preds = %10
%32 = 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 = [5 x i8] c"%s: \00"
@.str.1 = [5 x i8] c"%2x \00"
define void @print_buf(i8* nocapture %0, i32 %1, i8* %2) {
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* %2)
%5 = icmp eq i32 %1, 0
br i1 %5, label %21, label %6
6: ; preds = %3
%7 = zext i32 %1 to i64
br label %8
8: ; preds = %6, %18
%9 = phi i64 [ 0, %6 ], [ %19, %18 ]
%10 = getelementptr inbounds i8, i8* %0, i64 %9
%11 = load i8, i8* %10
%12 = zext i8 %11 to i32
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i32 %12)
%14 = and i64 %9, 7
%15 = icmp eq i64 %14, 7
br i1 %15, label %16, label %18
16: ; preds = %8
%17 = tail call i32 @putchar(i32 10)
br label %18
18: ; preds = %8, %16
%19 = add nuw nsw i64 %9, 1
%20 = icmp eq i64 %19, %7
br i1 %20, label %21, label %8
21: ; preds = %18, %3
%22 = tail call i32 @putchar(i32 10)
ret void
}