#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 extract(char *, char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ stderr;
int main(int argc, char **argv) {
  if (argc < 3) {
    fprintf(stderr, "Usage: %s input output\n", argv[0]);
    return 1;
  }
  return extract(argv[1], argv[2]);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x3,-0x8(%rbp)
jge    1168 <main+0x48>
mov    0x2e99(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xea9(%rip),%rsi
call   1030 <fprintf@plt>
movl   $0x1,-0x4(%rbp)
jmp    1180 <main+0x60>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rsi
call   1040 <extract@plt>
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
cmp    $0x2,%edi
jg     1145 <main+0x25>
mov    0x2eb3(%rip),%rax
mov    (%rax),%edi
mov    (%rsi),%rdx
lea    0xec7(%rip),%rsi
call   1030 <fprintf@plt>
mov    $0x1,%eax
pop    %rcx
ret
mov    0x8(%rsi),%rdi
mov    0x10(%rsi),%rsi
pop    %rax
jmp    1040 <extract@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [24 x i8] c"Usage: %s input output\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%6 = load i32, i32* %4
%7 = icmp slt i32 %6, 3
br i1 %7, label %8, label %14
8: ; preds = %2
%9 = load i32, i32* @stderr
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 0
%12 = load i8*, i8** %11
%13 = call i32 @fprintf(i32 %9, i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str, i64 0, i64 0), i8* %12)
store i32 1, i32* %3
br label %22
14: ; preds = %2
%15 = load i8**, i8*** %5
%16 = getelementptr inbounds i8*, i8** %15, i64 1
%17 = load i8*, i8** %16
%18 = load i8**, i8*** %5
%19 = getelementptr inbounds i8*, i8** %18, i64 2
%20 = load i8*, i8** %19
%21 = call i32 @extract(i8* %17, i8* %20)
store i32 %21, i32* %3
br label %22
22: ; preds = %14, %8
%23 = load i32, i32* %3
ret i32 %23
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [24 x i8] c"Usage: %s input output\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 3
br i1 %3, label %4, label %8
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = load i8*, i8** %1
%7 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str, i64 0, i64 0), i8* %6)
br label %14
8: ; preds = %2
%9 = getelementptr inbounds i8*, i8** %1, i64 1
%10 = load i8*, i8** %9
%11 = getelementptr inbounds i8*, i8** %1, i64 2
%12 = load i8*, i8** %11
%13 = tail call i32 @extract(i8* %10, i8* %12)
br label %14
14: ; preds = %8, %4
%15 = phi i32 [ 1, %4 ], [ %13, %8 ]
ret i32 %15
}