#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 atoi(char *);
int func(int, int);
int main(int argc, char *argv[]) {
  int a, b, c;
  if (argc < 2)
    return 1;
  a = atoi(argv[1]);
  b = atoi(argv[2]);
  c = func(a, b);
  if (c == (a + b))
    return 0;
  else
    return 1;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
jge    114c <main+0x2c>
movl   $0x1,-0x4(%rbp)
jmp    119e <main+0x7e>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1040 <atoi@plt>
mov    %eax,-0x14(%rbp)
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rdi
call   1040 <atoi@plt>
mov    %eax,-0x18(%rbp)
mov    -0x14(%rbp),%edi
mov    -0x18(%rbp),%esi
call   1030 <func@plt>
mov    %eax,-0x1c(%rbp)
mov    -0x1c(%rbp),%eax
mov    -0x14(%rbp),%ecx
add    -0x18(%rbp),%ecx
cmp    %ecx,%eax
jne    1197 <main+0x77>
movl   $0x0,-0x4(%rbp)
jmp    119e <main+0x7e>
movl   $0x1,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
mov    $0x1,%eax
cmp    $0x2,%edi
jl     1160 <main+0x40>
push   %rbp
push   %rbx
push   %rax
mov    %rsi,%rbx
mov    0x8(%rsi),%rdi
call   1040 <atoi@plt>
mov    %eax,%ebp
mov    0x10(%rbx),%rdi
call   1040 <atoi@plt>
mov    %eax,%ebx
mov    %ebp,%edi
mov    %eax,%esi
call   1030 <func@plt>
mov    %eax,%ecx
add    %ebp,%ebx
xor    %eax,%eax
cmp    %ebx,%ecx
setne  %al
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%9 = load i32, i32* %4
%10 = icmp slt i32 %9, 2
br i1 %10, label %11, label %12
11: ; preds = %2
store i32 1, i32* %3
br label %31
12: ; preds = %2
%13 = load i8**, i8*** %5
%14 = getelementptr inbounds i8*, i8** %13, i64 1
%15 = load i8*, i8** %14
%16 = call i32 @atoi(i8* %15)
store i32 %16, i32* %6
%17 = load i8**, i8*** %5
%18 = getelementptr inbounds i8*, i8** %17, i64 2
%19 = load i8*, i8** %18
%20 = call i32 @atoi(i8* %19)
store i32 %20, i32* %7
%21 = load i32, i32* %6
%22 = load i32, i32* %7
%23 = call i32 @func(i32 %21, i32 %22)
store i32 %23, i32* %8
%24 = load i32, i32* %8
%25 = load i32, i32* %6
%26 = load i32, i32* %7
%27 = add nsw i32 %25, %26
%28 = icmp eq i32 %24, %27
br i1 %28, label %29, label %30
29: ; preds = %12
store i32 0, i32* %3
br label %31
30: ; preds = %12
store i32 1, i32* %3
br label %31
31: ; preds = %30, %29, %11
%32 = load i32, i32* %3
ret i32 %32
}

LLVM IR (-O2):
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %15, label %4
4: ; preds = %2
%5 = getelementptr inbounds i8*, i8** %1, i64 1
%6 = load i8*, i8** %5
%7 = tail call i32 @atoi(i8* %6)
%8 = getelementptr inbounds i8*, i8** %1, i64 2
%9 = load i8*, i8** %8
%10 = tail call i32 @atoi(i8* %9)
%11 = tail call i32 @func(i32 %7, i32 %10)
%12 = add nsw i32 %10, %7
%13 = icmp ne i32 %11, %12
%14 = zext i1 %13 to i32
br label %15
15: ; preds = %4, %2
%16 = phi i32 [ 1, %2 ], [ %14, %4 ]
ret i32 %16
}