#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_block64(const char *title, const unsigned char *block) {
  int i;
  printf("%s", title);
  for (i = 0; i < 8; i++) {
    printf("%02x ", block[i]);
  }
  printf("\n");
}


x86 assembly (clang, -O0):
<print_block64>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x8(%rbp),%rsi
lea    0xed5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x14(%rbp)
cmpl   $0x8,-0x14(%rbp)
jge    116b <print_block64+0x5b>
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
movzbl (%rax,%rcx,1),%esi
lea    0xead(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1139 <print_block64+0x29>
lea    0xe97(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_block64>:
push   %r14
push   %rbx
push   %rax
mov    %rsi,%rbx
mov    %rdi,%rsi
lea    0xecf(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl (%rbx),%esi
lea    0xec1(%rip),%r14
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl 0x1(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl 0x2(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl 0x3(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl 0x4(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl 0x5(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl 0x6(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
movzbl 0x7(%rbx),%esi
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xa,%edi
add    $0x8,%rsp
pop    %rbx
pop    %r14
jmp    1030 <putchar@plt>

LLVM IR (-O0):
@.str = [3 x i8] c"%s\00"
@.str.1 = [6 x i8] c"%02x \00"
@.str.2 = [2 x i8] c"\0A\00"
define void @print_block64(i8* %0, i8* %1) {
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i32
store i8* %0, i8** %3
store i8* %1, i8** %4
%6 = load i8*, i8** %3
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* %6)
store i32 0, i32* %5
br label %8
8: ; preds = %19, %2
%9 = load i32, i32* %5
%10 = icmp slt i32 %9, 8
br i1 %10, label %11, label %22
11: ; preds = %8
%12 = load i8*, i8** %4
%13 = load i32, i32* %5
%14 = sext i32 %13 to i64
%15 = getelementptr inbounds i8, i8* %12, i64 %14
%16 = load i8, i8* %15
%17 = zext i8 %16 to i32
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %17)
br label %19
19: ; preds = %11
%20 = load i32, i32* %5
%21 = add nsw i32 %20, 1
store i32 %21, i32* %5
br label %8
22: ; preds = %8
%23 = 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 = [3 x i8] c"%s\00"
@.str.1 = [6 x i8] c"%02x \00"
define void @print_block64(i8* %0, i8* nocapture %1) {
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8* %0)
%4 = load i8, i8* %1
%5 = zext i8 %4 to i32
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %5)
%7 = getelementptr inbounds i8, i8* %1, i64 1
%8 = load i8, i8* %7
%9 = zext i8 %8 to i32
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %9)
%11 = getelementptr inbounds i8, i8* %1, i64 2
%12 = load i8, i8* %11
%13 = zext i8 %12 to i32
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %13)
%15 = getelementptr inbounds i8, i8* %1, i64 3
%16 = load i8, i8* %15
%17 = zext i8 %16 to i32
%18 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %17)
%19 = getelementptr inbounds i8, i8* %1, i64 4
%20 = load i8, i8* %19
%21 = zext i8 %20 to i32
%22 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %21)
%23 = getelementptr inbounds i8, i8* %1, i64 5
%24 = load i8, i8* %23
%25 = zext i8 %24 to i32
%26 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %25)
%27 = getelementptr inbounds i8, i8* %1, i64 6
%28 = load i8, i8* %27
%29 = zext i8 %28 to i32
%30 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %29)
%31 = getelementptr inbounds i8, i8* %1, i64 7
%32 = load i8, i8* %31
%33 = zext i8 %32 to i32
%34 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %33)
%35 = tail call i32 @putchar(i32 10)
ret void
}