#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 /*<<< orphan*/ arr;

/* Variables and functions */
int /*<<< orphan*/ printf(char *, int, ...);
int main() {
  int arr[] = {1, 2, 3, 4, 5, 6, 7, 8}, l;
  l = sizeof(arr) / sizeof(arr[0]);
  printf("%d\n", l);
  while (l--) {
    printf("arr[%d] -> %d\n", l, arr[l]);
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x40,%rsp
movl   $0x0,-0x4(%rbp)
mov    0xeda(%rip),%rax
mov    %rax,-0x30(%rbp)
mov    0xed7(%rip),%rax
mov    %rax,-0x28(%rbp)
mov    0xed4(%rip),%rax
mov    %rax,-0x20(%rbp)
mov    0xed1(%rip),%rax
mov    %rax,-0x18(%rbp)
movl   $0x8,-0x34(%rbp)
mov    -0x34(%rbp),%esi
lea    0xecf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x34(%rbp),%eax
mov    %eax,%ecx
add    $0xffffffff,%ecx
mov    %ecx,-0x34(%rbp)
cmp    $0x0,%eax
je     1195 <main+0x85>
mov    -0x34(%rbp),%esi
movslq -0x34(%rbp),%rax
mov    -0x30(%rbp,%rax,4),%edx
lea    0xe97(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1163 <main+0x53>
xor    %eax,%eax
add    $0x40,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xef3(%rip),%rdi
mov    $0x8,%esi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xed5(%rip),%rbx
mov    %rbx,%rdi
mov    $0x7,%esi
mov    $0x8,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x6,%esi
mov    $0x7,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
mov    $0x6,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
mov    $0x5,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
mov    $0x4,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
mov    $0x3,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
mov    $0x2,%edx
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
xor    %esi,%esi
mov    $0x1,%edx
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@__const.main.arr = [8 x i32] [i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8]
@.str = [4 x i8] c"%d\0A\00"
@.str.1 = [15 x i8] c"arr[%d] -> %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [8 x i32]
%3 = alloca i32
store i32 0, i32* %1
%4 = bitcast [8 x i32]* %2 to i8*
store i32 8, i32* %3
%5 = load i32, i32* %3
%6 = call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %5)
br label %7
7: ; preds = %11, %0
%8 = load i32, i32* %3
%9 = add nsw i32 %8, -1
store i32 %9, i32* %3
%10 = icmp ne i32 %8, 0
br i1 %10, label %11, label %18
11: ; preds = %7
%12 = load i32, i32* %3
%13 = load i32, i32* %3
%14 = sext i32 %13 to i64
%15 = getelementptr inbounds [8 x i32], [8 x i32]* %2, i64 0, i64 %14
%16 = load i32, i32* %15
%17 = call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.1, i64 0, i64 0), i32 %12, i32 %16)
br label %7
18: ; preds = %7
ret i32 0
}

LLVM IR (-O2):
@.str = [4 x i8] c"%d\0A\00"
@.str.1 = [15 x i8] c"arr[%d] -> %d\0A\00"
define i32 @main() {
%1 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 8)
%2 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.1, i64 0, i64 0), i32 7, i32 8)
%3 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.1, i64 0, i64 0), i32 6, i32 7)
%4 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.1, i64 0, i64 0), i32 5, i32 6)
%5 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.1, i64 0, i64 0), i32 4, i32 5)
%6 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.1, i64 0, i64 0), i32 3, i32 4)
%7 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.1, i64 0, i64 0), i32 2, i32 3)
%8 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.1, i64 0, i64 0), i32 1, i32 2)
%9 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.1, i64 0, i64 0), i32 0, i32 1)
ret i32 0
}