#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 dump_buf(const unsigned char *buf, int len) {
  int i = 0;
  printf("--------------------------------");
  for (i = 0; i < len; i++) {
    if ((i & 0xf) == 0)
      printf("\n");
    printf("%.2x ", buf[i]);
  }
  printf("\n--------------------------------\n");
}


x86 assembly (clang, -O0):
<dump_buf>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
movl   $0x0,-0x10(%rbp)
lea    0xed3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x10(%rbp)
mov    -0x10(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    118c <dump_buf+0x7c>
mov    -0x10(%rbp),%eax
and    $0xf,%eax
cmp    $0x0,%eax
jne    1164 <dump_buf+0x54>
lea    0xeeb(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%rax
movslq -0x10(%rbp),%rcx
movzbl (%rax,%rcx,1),%esi
lea    0xeaa(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    113b <dump_buf+0x2b>
lea    0xe94(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<dump_buf>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %esi,%ebp
mov    %rdi,%r15
lea    0xec4(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
test   %ebp,%ebp
jle    1189 <dump_buf+0x59>
mov    %ebp,%ebp
lea    0xea9(%rip),%r14
xor    %ebx,%ebx
jmp    1178 <dump_buf+0x48>
nopl   0x0(%rax,%rax,1)
movzbl (%r15,%rbx,1),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1050 <printf@plt>
add    $0x1,%rbx
cmp    %rbx,%rbp
je     1189 <dump_buf+0x59>
test   $0xf,%bl
jne    1160 <dump_buf+0x30>
mov    $0xa,%edi
call   1030 <putchar@plt>
jmp    1160 <dump_buf+0x30>
lea    0xe76(%rip),%rdi
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
jmp    1040 <puts@plt>

LLVM IR (-O0):
@.str = [33 x i8] c"--------------------------------\00"
@.str.1 = [2 x i8] c"\0A\00"
@.str.2 = [6 x i8] c"%.2x \00"
@.str.3 = [35 x i8] c"\0A--------------------------------\0A\00"
define void @dump_buf(i8* %0, i32 %1) {
%3 = alloca i8*
%4 = alloca i32
%5 = alloca i32
store i8* %0, i8** %3
store i32 %1, i32* %4
store i32 0, i32* %5
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %5
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* %5
%13 = and i32 %12, 15
%14 = icmp eq i32 %13, 0
br i1 %14, label %15, label %17
15: ; preds = %11
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
br label %17
17: ; preds = %15, %11
%18 = load i8*, i8** %3
%19 = load i32, i32* %5
%20 = sext i32 %19 to i64
%21 = getelementptr inbounds i8, i8* %18, i64 %20
%22 = load i8, i8* %21
%23 = zext i8 %22 to i32
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %23)
br label %25
25: ; preds = %17
%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 ([35 x i8], [35 x i8]* @.str.3, i64 0, i64 0))
ret void
}

LLVM IR (-O2):
@.str = [33 x i8] c"--------------------------------\00"
@.str.2 = [6 x i8] c"%.2x \00"
@str = [34 x i8] c"\0A--------------------------------\00"
define void @dump_buf(i8* nocapture %0, i32 %1) {
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([33 x i8], [33 x i8]* @.str, i64 0, i64 0))
%4 = icmp sgt i32 %1, 0
br i1 %4, label %5, label %20
5: ; preds = %2
%6 = zext i32 %1 to i64
br label %7
7: ; preds = %5, %13
%8 = phi i64 [ 0, %5 ], [ %18, %13 ]
%9 = and i64 %8, 15
%10 = icmp eq i64 %9, 0
br i1 %10, label %11, label %13
11: ; preds = %7
%12 = tail call i32 @putchar(i32 10)
br label %13
13: ; preds = %11, %7
%14 = getelementptr inbounds i8, i8* %0, i64 %8
%15 = load i8, i8* %14
%16 = zext i8 %15 to i32
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 %16)
%18 = add nuw nsw i64 %8, 1
%19 = icmp eq i64 %18, %6
br i1 %19, label %20, label %7
20: ; preds = %13, %2
%21 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([34 x i8], [34 x i8]* @str, i64 0, i64 0))
ret void
}