int main() {
  static int array_size = 1000;
  int arr[1000] = {0};
  int i;
  for (i = 0; i < array_size; i++) {
    arr[i] = i;
  }
  int sum = arr[50] + arr[array_size - 1];
  return (sum + i) % 128;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0xfc0,%rsp
movl   $0x0,-0x4(%rbp)
lea    -0xfb0(%rbp),%rdi
xor    %esi,%esi
mov    $0xfa0,%edx
call   1030 <memset@plt>
movl   $0x0,-0xfb4(%rbp)
mov    -0xfb4(%rbp),%eax
cmp    0x2edd(%rip),%eax
jge    1179 <main+0x69>
mov    -0xfb4(%rbp),%ecx
movslq -0xfb4(%rbp),%rax
mov    %ecx,-0xfb0(%rbp,%rax,4)
mov    -0xfb4(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0xfb4(%rbp)
jmp    113f <main+0x2f>
mov    -0xee8(%rbp),%eax
mov    0x2ea3(%rip),%ecx
sub    $0x1,%ecx
movslq %ecx,%rcx
add    -0xfb0(%rbp,%rcx,4),%eax
mov    %eax,-0xfb8(%rbp)
mov    -0xfb8(%rbp),%eax
add    -0xfb4(%rbp),%eax
mov    $0x80,%ecx
cltd
idiv   %ecx
mov    %edx,%eax
add    $0xfc0,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0xfa0,%rsp
mov    %rsp,%rdi
xor    %ebx,%ebx
mov    $0xfa0,%edx
xor    %esi,%esi
call   1030 <memset@plt>
movdqa 0xecf(%rip),%xmm0
movdqa 0xed6(%rip),%xmm8
movdqa 0xedd(%rip),%xmm9
movdqa 0xee4(%rip),%xmm10
movdqa 0xeeb(%rip),%xmm11
movdqa 0xef2(%rip),%xmm12
movdqa 0xefa(%rip),%xmm6
movdqa 0xf02(%rip),%xmm7
movdqa 0xf0a(%rip),%xmm1
movdqa 0xf12(%rip),%xmm2
movdqa 0xf1a(%rip),%xmm3
cs nopw 0x0(%rax,%rax,1)
movdqa %xmm0,%xmm4
paddd  %xmm8,%xmm4
movdqa %xmm0,(%rsp,%rbx,4)
movdqa %xmm4,0x10(%rsp,%rbx,4)
movdqa %xmm0,%xmm4
paddd  %xmm9,%xmm4
movdqa %xmm0,%xmm5
paddd  %xmm10,%xmm5
movdqa %xmm4,0x20(%rsp,%rbx,4)
movdqa %xmm5,0x30(%rsp,%rbx,4)
movdqa %xmm0,%xmm4
paddd  %xmm11,%xmm4
movdqa %xmm0,%xmm5
paddd  %xmm12,%xmm5
movdqa %xmm4,0x40(%rsp,%rbx,4)
movdqa %xmm5,0x50(%rsp,%rbx,4)
movdqa %xmm0,%xmm4
paddd  %xmm6,%xmm4
movdqa %xmm0,%xmm5
paddd  %xmm7,%xmm5
movdqa %xmm4,0x60(%rsp,%rbx,4)
movdqa %xmm5,0x70(%rsp,%rbx,4)
movdqa %xmm0,%xmm4
paddd  %xmm1,%xmm4
movdqa %xmm0,%xmm5
paddd  %xmm2,%xmm5
movdqa %xmm4,0x80(%rsp,%rbx,4)
movdqa %xmm5,0x90(%rsp,%rbx,4)
add    $0x28,%rbx
paddd  %xmm3,%xmm0
cmp    $0x3e8,%rbx
jne    1190 <main+0x80>
mov    0xc8(%rsp),%ecx
mov    0xf9c(%rsp),%edx
lea    (%rcx,%rdx,1),%eax
add    $0x3e8,%eax
add    %edx,%ecx
add    $0x467,%ecx
test   %eax,%eax
cmovns %eax,%ecx
and    $0xffffff80,%ecx
sub    %ecx,%eax
add    $0xfa0,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@main.array_size = internal global i32 1000
define i32 @main() {
%1 = alloca i32
%2 = alloca [1000 x i32]
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
%5 = bitcast [1000 x i32]* %2 to i8*
store i32 0, i32* %3
br label %6
6: ; preds = %15, %0
%7 = load i32, i32* %3
%8 = load i32, i32* @main.array_size
%9 = icmp slt i32 %7, %8
br i1 %9, label %10, label %18
10: ; preds = %6
%11 = load i32, i32* %3
%12 = load i32, i32* %3
%13 = sext i32 %12 to i64
%14 = getelementptr inbounds [1000 x i32], [1000 x i32]* %2, i64 0, i64 %13
store i32 %11, i32* %14
br label %15
15: ; preds = %10
%16 = load i32, i32* %3
%17 = add nsw i32 %16, 1
store i32 %17, i32* %3
br label %6
18: ; preds = %6
%19 = getelementptr inbounds [1000 x i32], [1000 x i32]* %2, i64 0, i64 50
%20 = load i32, i32* %19
%21 = load i32, i32* @main.array_size
%22 = sub nsw i32 %21, 1
%23 = sext i32 %22 to i64
%24 = getelementptr inbounds [1000 x i32], [1000 x i32]* %2, i64 0, i64 %23
%25 = load i32, i32* %24
%26 = add nsw i32 %20, %25
store i32 %26, i32* %4
%27 = load i32, i32* %4
%28 = load i32, i32* %3
%29 = add nsw i32 %27, %28
%30 = srem i32 %29, 128
ret i32 %30
}

LLVM IR (-O2):
define i32 @main() {
%1 = alloca [1000 x i32]
%2 = bitcast [1000 x i32]* %1 to i8*
br label %3
3: ; preds = %3, %0
%4 = phi i64 [ 0, %0 ], [ %39, %3 ]
%5 = phi <4 x i32> [ <i32 0, i32 1, i32 2, i32 3>, %0 ], [ %40, %3 ]
%6 = add <4 x i32> %5, <i32 4, i32 4, i32 4, i32 4>
%7 = getelementptr inbounds [1000 x i32], [1000 x i32]* %1, i64 0, i64 %4
%8 = bitcast i32* %7 to <4 x i32>*
store <4 x i32> %5, <4 x i32>* %8
%9 = getelementptr inbounds i32, i32* %7, i64 4
%10 = bitcast i32* %9 to <4 x i32>*
store <4 x i32> %6, <4 x i32>* %10
%11 = add nuw nsw i64 %4, 8
%12 = add <4 x i32> %5, <i32 8, i32 8, i32 8, i32 8>
%13 = add <4 x i32> %5, <i32 12, i32 12, i32 12, i32 12>
%14 = getelementptr inbounds [1000 x i32], [1000 x i32]* %1, i64 0, i64 %11
%15 = bitcast i32* %14 to <4 x i32>*
store <4 x i32> %12, <4 x i32>* %15
%16 = getelementptr inbounds i32, i32* %14, i64 4
%17 = bitcast i32* %16 to <4 x i32>*
store <4 x i32> %13, <4 x i32>* %17
%18 = add nuw nsw i64 %4, 16
%19 = add <4 x i32> %5, <i32 16, i32 16, i32 16, i32 16>
%20 = add <4 x i32> %5, <i32 20, i32 20, i32 20, i32 20>
%21 = getelementptr inbounds [1000 x i32], [1000 x i32]* %1, i64 0, i64 %18
%22 = bitcast i32* %21 to <4 x i32>*
store <4 x i32> %19, <4 x i32>* %22
%23 = getelementptr inbounds i32, i32* %21, i64 4
%24 = bitcast i32* %23 to <4 x i32>*
store <4 x i32> %20, <4 x i32>* %24
%25 = add nuw nsw i64 %4, 24
%26 = add <4 x i32> %5, <i32 24, i32 24, i32 24, i32 24>
%27 = add <4 x i32> %5, <i32 28, i32 28, i32 28, i32 28>
%28 = getelementptr inbounds [1000 x i32], [1000 x i32]* %1, i64 0, i64 %25
%29 = bitcast i32* %28 to <4 x i32>*
store <4 x i32> %26, <4 x i32>* %29
%30 = getelementptr inbounds i32, i32* %28, i64 4
%31 = bitcast i32* %30 to <4 x i32>*
store <4 x i32> %27, <4 x i32>* %31
%32 = add nuw nsw i64 %4, 32
%33 = add <4 x i32> %5, <i32 32, i32 32, i32 32, i32 32>
%34 = add <4 x i32> %5, <i32 36, i32 36, i32 36, i32 36>
%35 = getelementptr inbounds [1000 x i32], [1000 x i32]* %1, i64 0, i64 %32
%36 = bitcast i32* %35 to <4 x i32>*
store <4 x i32> %33, <4 x i32>* %36
%37 = getelementptr inbounds i32, i32* %35, i64 4
%38 = bitcast i32* %37 to <4 x i32>*
store <4 x i32> %34, <4 x i32>* %38
%39 = add nuw nsw i64 %4, 40
%40 = add <4 x i32> %5, <i32 40, i32 40, i32 40, i32 40>
%41 = icmp eq i64 %39, 1000
br i1 %41, label %42, label %3
42: ; preds = %3
%43 = getelementptr inbounds [1000 x i32], [1000 x i32]* %1, i64 0, i64 50
%44 = load i32, i32* %43
%45 = getelementptr inbounds [1000 x i32], [1000 x i32]* %1, i64 0, i64 999
%46 = load i32, i32* %45
%47 = add i32 %44, 1000
%48 = add i32 %47, %46
%49 = srem i32 %48, 128
ret i32 %49
}