#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 sum(int *, int);
int main(void) {
  int len = 100;
  int arr[len];
  for (int i = 0; i < len; i++)
    arr[i] = i;
  return sum(arr, len);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x64,-0x8(%rbp)
mov    -0x8(%rbp),%eax
mov    %rsp,%rcx
mov    %rcx,-0x10(%rbp)
lea    0xf(,%rax,4),%rdx
and    $0xfffffffffffffff0,%rdx
mov    %rsp,%rcx
sub    %rdx,%rcx
mov    %rcx,-0x28(%rbp)
mov    %rcx,%rsp
mov    %rax,-0x18(%rbp)
movl   $0x0,-0x1c(%rbp)
mov    -0x1c(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    117c <main+0x6c>
mov    -0x28(%rbp),%rax
mov    -0x1c(%rbp),%edx
movslq -0x1c(%rbp),%rcx
mov    %edx,(%rax,%rcx,4)
mov    -0x1c(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x1c(%rbp)
jmp    1154 <main+0x44>
mov    -0x28(%rbp),%rdi
mov    -0x8(%rbp),%esi
call   1030 <sum@plt>
mov    %eax,-0x4(%rbp)
mov    -0x10(%rbp),%rax
mov    %rax,%rsp
mov    -0x4(%rbp),%eax
mov    %rbp,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x198,%rsp
movaps 0xee2(%rip),%xmm0
movaps %xmm0,(%rsp)
movaps 0xee7(%rip),%xmm0
movaps %xmm0,0x10(%rsp)
movaps 0xeeb(%rip),%xmm0
movaps %xmm0,0x20(%rsp)
movaps 0xeef(%rip),%xmm0
movaps %xmm0,0x30(%rsp)
movaps 0xef3(%rip),%xmm0
movaps %xmm0,0x40(%rsp)
movaps 0xef7(%rip),%xmm0
movaps %xmm0,0x50(%rsp)
movaps 0xefb(%rip),%xmm0
movaps %xmm0,0x60(%rsp)
movaps 0xeff(%rip),%xmm0
movaps %xmm0,0x70(%rsp)
movaps 0xf03(%rip),%xmm0
movaps %xmm0,0x80(%rsp)
movaps 0xf04(%rip),%xmm0
movaps %xmm0,0x90(%rsp)
movaps 0xf05(%rip),%xmm0
movaps %xmm0,0xa0(%rsp)
movaps 0xf06(%rip),%xmm0
movaps %xmm0,0xb0(%rsp)
movaps 0xf07(%rip),%xmm0
movaps %xmm0,0xc0(%rsp)
movaps 0xf08(%rip),%xmm0
movaps %xmm0,0xd0(%rsp)
movaps 0xf09(%rip),%xmm0
movaps %xmm0,0xe0(%rsp)
movaps 0xf0a(%rip),%xmm0
movaps %xmm0,0xf0(%rsp)
movaps 0xf0b(%rip),%xmm0
movaps %xmm0,0x100(%rsp)
movaps 0xf0c(%rip),%xmm0
movaps %xmm0,0x110(%rsp)
movaps 0xf0d(%rip),%xmm0
movaps %xmm0,0x120(%rsp)
movaps 0xf0e(%rip),%xmm0
movaps %xmm0,0x130(%rsp)
movaps 0xf0f(%rip),%xmm0
movaps %xmm0,0x140(%rsp)
movaps 0xf10(%rip),%xmm0
movaps %xmm0,0x150(%rsp)
movaps 0xf11(%rip),%xmm0
movaps %xmm0,0x160(%rsp)
movaps 0xf12(%rip),%xmm0
movaps %xmm0,0x170(%rsp)
movaps 0xf13(%rip),%xmm0
movaps %xmm0,0x180(%rsp)
mov    %rsp,%rdi
mov    $0x64,%esi
call   1030 <sum@plt>
add    $0x198,%rsp
ret

LLVM IR (-O0):
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i8*
%4 = alloca i64
%5 = alloca i32
store i32 0, i32* %1
store i32 100, i32* %2
%6 = load i32, i32* %2
%7 = zext i32 %6 to i64
%8 = call i8* @llvm.stacksave()
store i8* %8, i8** %3
%9 = alloca i32, i64 %7
store i64 %7, i64* %4
store i32 0, i32* %5
br label %10
10: ; preds = %19, %0
%11 = load i32, i32* %5
%12 = load i32, i32* %2
%13 = icmp slt i32 %11, %12
br i1 %13, label %14, label %22
14: ; preds = %10
%15 = load i32, i32* %5
%16 = load i32, i32* %5
%17 = sext i32 %16 to i64
%18 = getelementptr inbounds i32, i32* %9, i64 %17
store i32 %15, i32* %18
br label %19
19: ; preds = %14
%20 = load i32, i32* %5
%21 = add nsw i32 %20, 1
store i32 %21, i32* %5
br label %10
22: ; preds = %10
%23 = load i32, i32* %2
%24 = call i32 @sum(i32* %9, i32 %23)
store i32 %24, i32* %1
%25 = load i8*, i8** %3
%26 = load i32, i32* %1
ret i32 %26
}

LLVM IR (-O2):
define i32 @main() {
%1 = alloca [100 x i32]
%2 = bitcast [100 x i32]* %1 to <4 x i32>*
store <4 x i32> <i32 0, i32 1, i32 2, i32 3>, <4 x i32>* %2
%3 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 4
%4 = bitcast i32* %3 to <4 x i32>*
store <4 x i32> <i32 4, i32 5, i32 6, i32 7>, <4 x i32>* %4
%5 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 8
%6 = bitcast i32* %5 to <4 x i32>*
store <4 x i32> <i32 8, i32 9, i32 10, i32 11>, <4 x i32>* %6
%7 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 12
%8 = bitcast i32* %7 to <4 x i32>*
store <4 x i32> <i32 12, i32 13, i32 14, i32 15>, <4 x i32>* %8
%9 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 16
%10 = bitcast i32* %9 to <4 x i32>*
store <4 x i32> <i32 16, i32 17, i32 18, i32 19>, <4 x i32>* %10
%11 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 20
%12 = bitcast i32* %11 to <4 x i32>*
store <4 x i32> <i32 20, i32 21, i32 22, i32 23>, <4 x i32>* %12
%13 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 24
%14 = bitcast i32* %13 to <4 x i32>*
store <4 x i32> <i32 24, i32 25, i32 26, i32 27>, <4 x i32>* %14
%15 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 28
%16 = bitcast i32* %15 to <4 x i32>*
store <4 x i32> <i32 28, i32 29, i32 30, i32 31>, <4 x i32>* %16
%17 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 32
%18 = bitcast i32* %17 to <4 x i32>*
store <4 x i32> <i32 32, i32 33, i32 34, i32 35>, <4 x i32>* %18
%19 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 36
%20 = bitcast i32* %19 to <4 x i32>*
store <4 x i32> <i32 36, i32 37, i32 38, i32 39>, <4 x i32>* %20
%21 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 40
%22 = bitcast i32* %21 to <4 x i32>*
store <4 x i32> <i32 40, i32 41, i32 42, i32 43>, <4 x i32>* %22
%23 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 44
%24 = bitcast i32* %23 to <4 x i32>*
store <4 x i32> <i32 44, i32 45, i32 46, i32 47>, <4 x i32>* %24
%25 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 48
%26 = bitcast i32* %25 to <4 x i32>*
store <4 x i32> <i32 48, i32 49, i32 50, i32 51>, <4 x i32>* %26
%27 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 52
%28 = bitcast i32* %27 to <4 x i32>*
store <4 x i32> <i32 52, i32 53, i32 54, i32 55>, <4 x i32>* %28
%29 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 56
%30 = bitcast i32* %29 to <4 x i32>*
store <4 x i32> <i32 56, i32 57, i32 58, i32 59>, <4 x i32>* %30
%31 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 60
%32 = bitcast i32* %31 to <4 x i32>*
store <4 x i32> <i32 60, i32 61, i32 62, i32 63>, <4 x i32>* %32
%33 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 64
%34 = bitcast i32* %33 to <4 x i32>*
store <4 x i32> <i32 64, i32 65, i32 66, i32 67>, <4 x i32>* %34
%35 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 68
%36 = bitcast i32* %35 to <4 x i32>*
store <4 x i32> <i32 68, i32 69, i32 70, i32 71>, <4 x i32>* %36
%37 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 72
%38 = bitcast i32* %37 to <4 x i32>*
store <4 x i32> <i32 72, i32 73, i32 74, i32 75>, <4 x i32>* %38
%39 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 76
%40 = bitcast i32* %39 to <4 x i32>*
store <4 x i32> <i32 76, i32 77, i32 78, i32 79>, <4 x i32>* %40
%41 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 80
%42 = bitcast i32* %41 to <4 x i32>*
store <4 x i32> <i32 80, i32 81, i32 82, i32 83>, <4 x i32>* %42
%43 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 84
%44 = bitcast i32* %43 to <4 x i32>*
store <4 x i32> <i32 84, i32 85, i32 86, i32 87>, <4 x i32>* %44
%45 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 88
%46 = bitcast i32* %45 to <4 x i32>*
store <4 x i32> <i32 88, i32 89, i32 90, i32 91>, <4 x i32>* %46
%47 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 92
%48 = bitcast i32* %47 to <4 x i32>*
store <4 x i32> <i32 92, i32 93, i32 94, i32 95>, <4 x i32>* %48
%49 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 96
%50 = bitcast i32* %49 to <4 x i32>*
store <4 x i32> <i32 96, i32 97, i32 98, i32 99>, <4 x i32>* %50
%51 = getelementptr inbounds [100 x i32], [100 x i32]* %1, i64 0, i64 0
%52 = call i32 @sum(i32* %51, i32 100)
ret i32 %52
}