#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 /*<<< orphan*/ printf(char *);
scalar_t__ scan(char *);
int main(int argc, char *argv[]) {
  if (argc <= 1) {
    printf("scanner: no input file.\n");
    return -1;
  }
  if (scan(argv[1]) == 0) {
    printf("Can\'t read input file!\n");
    return -1;
  }
  return 0;
}


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   $0x1,-0x8(%rbp)
jg     1158 <main+0x38>
lea    0xeb9(%rip),%rdi
call   1030 <printf@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    118e <main+0x6e>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1040 <scan@plt>
cmp    $0x0,%rax
jne    1187 <main+0x67>
lea    0xea3(%rip),%rdi
call   1030 <printf@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    118e <main+0x6e>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
cmp    $0x2,%edi
jge    112f <main+0xf>
lea    0xeea(%rip),%rdi
jmp    114b <main+0x2b>
mov    0x8(%rsi),%rdi
call   1040 <scan@plt>
mov    %rax,%rcx
xor    %eax,%eax
test   %rcx,%rcx
je     1144 <main+0x24>
pop    %rcx
ret
lea    0xeb5(%rip),%rdi
call   1030 <puts@plt>
mov    $0xffffffff,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [25 x i8] c"scanner: no input file.\0A\00"
@.str.1 = [24 x i8] c"Can't read input file!\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 sle i32 %6, 1
br i1 %7, label %8, label %10
8: ; preds = %2
%9 = call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0))
store i32 -1, i32* %3
br label %19
10: ; preds = %2
%11 = load i8**, i8*** %5
%12 = getelementptr inbounds i8*, i8** %11, i64 1
%13 = load i8*, i8** %12
%14 = call i64 @scan(i8* %13)
%15 = icmp eq i64 %14, 0
br i1 %15, label %16, label %18
16: ; preds = %10
%17 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.1, i64 0, i64 0))
store i32 -1, i32* %3
br label %19
18: ; preds = %10
store i32 0, i32* %3
br label %19
19: ; preds = %18, %16, %8
%20 = load i32, i32* %3
ret i32 %20
}

LLVM IR (-O2):
@str = [23 x i8] c"Can't read input file!\00"
@str.2 = [24 x i8] c"scanner: no input file.\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %9, label %4
4: ; preds = %2
%5 = getelementptr inbounds i8*, i8** %1, i64 1
%6 = load i8*, i8** %5
%7 = tail call i64 @scan(i8* %6)
%8 = icmp eq i64 %7, 0
br i1 %8, label %9, label %12
9: ; preds = %4, %2
%10 = phi i8* [ getelementptr inbounds ([24 x i8], [24 x i8]* @str.2, i64 0, i64 0), %2 ], [ getelementptr inbounds ([23 x i8], [23 x i8]* @str, i64 0, i64 0), %4 ]
%11 = tail call i32 @puts(i8* dereferenceable(1) %10)
br label %12
12: ; preds = %9, %4
%13 = phi i32 [ 0, %4 ], [ -1, %9 ]
ret i32 %13
}