#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 calculate_full_year(int *, int, int, int);
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ printf(char *, int);
int /*<<< orphan*/ stderr;
int main(int argc, char **argv) {
  int current_year;
  int difference;
  if (argc < 3) {
    fprintf(stderr,
            "Usage: %s two_digit_year years_future_events [current_year]\n",
            argv[0]);
    exit(1);
  }
  if (argc == 4)
    current_year = atoi(argv[3]);
  else
    current_year = 0;
  printf("%d\n", calculate_full_year(&difference, atoi(argv[1]), atoi(argv[2]),
                                     current_year));
  return 0;
}


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   $0x3,-0x8(%rbp)
jge    1196 <main+0x46>
mov    0x2e69(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xe79(%rip),%rsi
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>
cmpl   $0x4,-0x8(%rbp)
jne    11b5 <main+0x65>
mov    -0x10(%rbp),%rax
mov    0x18(%rax),%rdi
call   1060 <atoi@plt>
mov    %eax,-0x14(%rbp)
jmp    11bc <main+0x6c>
movl   $0x0,-0x14(%rbp)
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1060 <atoi@plt>
mov    %eax,-0x1c(%rbp)
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rdi
call   1060 <atoi@plt>
mov    -0x1c(%rbp),%esi
mov    %eax,%edx
mov    -0x14(%rbp),%ecx
lea    -0x18(%rbp),%rdi
call   1050 <calculate_full_year@plt>
mov    %eax,%esi
lea    0xe4a(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
sub    $0x10,%rsp
mov    %rsi,%rbx
cmp    $0x2,%edi
jle    11b2 <main+0x62>
xor    %r14d,%r14d
cmp    $0x4,%edi
jne    1174 <main+0x24>
mov    0x18(%rbx),%rdi
call   1060 <atoi@plt>
mov    %eax,%r14d
mov    0x8(%rbx),%rdi
call   1060 <atoi@plt>
mov    %eax,%ebp
mov    0x10(%rbx),%rdi
call   1060 <atoi@plt>
lea    0xc(%rsp),%rdi
mov    %ebp,%esi
mov    %eax,%edx
mov    %r14d,%ecx
call   1050 <calculate_full_year@plt>
lea    0xe9d(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %rbp
ret
mov    0x2e27(%rip),%rax
mov    (%rax),%edi
mov    (%rbx),%rdx
lea    0xe3b(%rip),%rsi
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [61 x i8] c"Usage: %s two_digit_year years_future_events [current_year]\0A\00"
@.str.1 = [4 x i8] c"%d\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i32, i32* %4
%9 = icmp slt i32 %8, 3
br i1 %9, label %10, label %17
10: ; preds = %2
%11 = load i32, i32* @stderr
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i64 0
%14 = load i8*, i8** %13
%15 = call i32 @fprintf(i32 %11, i8* getelementptr inbounds ([61 x i8], [61 x i8]* @.str, i64 0, i64 0), i8* %14)
%16 = call i32 @exit(i32 1)
unreachable
17: ; preds = %2
%18 = load i32, i32* %4
%19 = icmp eq i32 %18, 4
br i1 %19, label %20, label %25
20: ; preds = %17
%21 = load i8**, i8*** %5
%22 = getelementptr inbounds i8*, i8** %21, i64 3
%23 = load i8*, i8** %22
%24 = call i32 @atoi(i8* %23)
store i32 %24, i32* %6
br label %26
25: ; preds = %17
store i32 0, i32* %6
br label %26
26: ; preds = %25, %20
%27 = load i8**, i8*** %5
%28 = getelementptr inbounds i8*, i8** %27, i64 1
%29 = load i8*, i8** %28
%30 = call i32 @atoi(i8* %29)
%31 = load i8**, i8*** %5
%32 = getelementptr inbounds i8*, i8** %31, i64 2
%33 = load i8*, i8** %32
%34 = call i32 @atoi(i8* %33)
%35 = load i32, i32* %6
%36 = call i32 @calculate_full_year(i32* %7, i32 %30, i32 %34, i32 %35)
%37 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %36)
ret i32 0
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [61 x i8] c"Usage: %s two_digit_year years_future_events [current_year]\0A\00"
@.str.1 = [4 x i8] c"%d\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = alloca i32
%4 = bitcast i32* %3 to i8*
%5 = icmp slt i32 %0, 3
br i1 %5, label %6, label %11
6: ; preds = %2
%7 = load i32, i32* @stderr
%8 = load i8*, i8** %1
%9 = tail call i32 @fprintf(i32 %7, i8* getelementptr inbounds ([61 x i8], [61 x i8]* @.str, i64 0, i64 0), i8* %8)
%10 = tail call i32 @exit(i32 1)
unreachable
11: ; preds = %2
%12 = icmp eq i32 %0, 4
br i1 %12, label %13, label %17
13: ; preds = %11
%14 = getelementptr inbounds i8*, i8** %1, i64 3
%15 = load i8*, i8** %14
%16 = tail call i32 @atoi(i8* %15)
br label %17
17: ; preds = %11, %13
%18 = phi i32 [ %16, %13 ], [ 0, %11 ]
%19 = getelementptr inbounds i8*, i8** %1, i64 1
%20 = load i8*, i8** %19
%21 = tail call i32 @atoi(i8* %20)
%22 = getelementptr inbounds i8*, i8** %1, i64 2
%23 = load i8*, i8** %22
%24 = tail call i32 @atoi(i8* %23)
%25 = call i32 @calculate_full_year(i32* %3, i32 %21, i32 %24, i32 %18)
%26 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %25)
ret i32 0
}