#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 is_fib(int);
int change_arr(int *arr, int size) {
  for (int i = 0; i < size; i++) {
    if (is_fib(arr[i]) == 1) {
      arr[i] = i;
    }
  }
  return 0;
}


x86 assembly (clang, -O0):
<change_arr>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
movl   $0x0,-0x10(%rbp)
mov    -0x10(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    116c <change_arr+0x5c>
mov    -0x8(%rbp),%rax
movslq -0x10(%rbp),%rcx
mov    (%rax,%rcx,4),%edi
call   1030 <is_fib@plt>
cmp    $0x1,%eax
jne    1159 <change_arr+0x49>
mov    -0x10(%rbp),%edx
mov    -0x8(%rbp),%rax
movslq -0x10(%rbp),%rcx
mov    %edx,(%rax,%rcx,4)
jmp    115e <change_arr+0x4e>
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    1126 <change_arr+0x16>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<change_arr>:
push   %r15
push   %r14
push   %rbx
test   %esi,%esi
jle    114d <change_arr+0x3d>
mov    %rdi,%r15
mov    %esi,%r14d
xor    %ebx,%ebx
jmp    1139 <change_arr+0x29>
cs nopw 0x0(%rax,%rax,1)
nopl   (%rax)
add    $0x1,%rbx
cmp    %rbx,%r14
je     114d <change_arr+0x3d>
mov    (%r15,%rbx,4),%edi
call   1030 <is_fib@plt>
cmp    $0x1,%eax
jne    1130 <change_arr+0x20>
mov    %ebx,(%r15,%rbx,4)
jmp    1130 <change_arr+0x20>
xor    %eax,%eax
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
define i32 @change_arr(i32* %0, i32 %1) {
%3 = alloca i32*
%4 = alloca i32
%5 = alloca i32
store i32* %0, i32** %3
store i32 %1, i32* %4
store i32 0, i32* %5
br label %6
6: ; preds = %25, %2
%7 = load i32, i32* %5
%8 = load i32, i32* %4
%9 = icmp slt i32 %7, %8
br i1 %9, label %10, label %28
10: ; preds = %6
%11 = load i32*, i32** %3
%12 = load i32, i32* %5
%13 = sext i32 %12 to i64
%14 = getelementptr inbounds i32, i32* %11, i64 %13
%15 = load i32, i32* %14
%16 = call i32 @is_fib(i32 %15)
%17 = icmp eq i32 %16, 1
br i1 %17, label %18, label %24
18: ; preds = %10
%19 = load i32, i32* %5
%20 = load i32*, i32** %3
%21 = load i32, i32* %5
%22 = sext i32 %21 to i64
%23 = getelementptr inbounds i32, i32* %20, i64 %22
store i32 %19, i32* %23
br label %24
24: ; preds = %18, %10
br label %25
25: ; preds = %24
%26 = load i32, i32* %5
%27 = add nsw i32 %26, 1
store i32 %27, i32* %5
br label %6
28: ; preds = %6
ret i32 0
}

LLVM IR (-O2):
define i32 @change_arr(i32* nocapture %0, i32 %1) {
%3 = icmp sgt i32 %1, 0
br i1 %3, label %4, label %6
4: ; preds = %2
%5 = zext i32 %1 to i64
br label %7
6: ; preds = %15, %2
ret i32 0
7: ; preds = %4, %15
%8 = phi i64 [ 0, %4 ], [ %16, %15 ]
%9 = getelementptr inbounds i32, i32* %0, i64 %8
%10 = load i32, i32* %9
%11 = tail call i32 @is_fib(i32 %10)
%12 = icmp eq i32 %11, 1
br i1 %12, label %13, label %15
13: ; preds = %7
%14 = trunc i64 %8 to i32
store i32 %14, i32* %9
br label %15
15: ; preds = %7, %13
%16 = add nuw nsw i64 %8, 1
%17 = icmp eq i64 %16, %5
br i1 %17, label %6, label %7
}