#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 */
scalar_t__ EOF;
int isValid(char *);
int /*<<< orphan*/ printf(char *, int);
scalar_t__ scanf(char *, char *);
int main(int argc, char **argv) {
  char s[20];
  printf("%d\n", isValid(""));
  while (scanf("%s", s) != EOF)
    printf("%d\n", isValid(s));
  return true;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xeb6(%rip),%rdi
call   1050 <isValid@plt>
mov    %eax,%esi
lea    0xea5(%rip),%rdi
call   1030 <printf@plt>
lea    -0x30(%rbp),%rsi
lea    0xe99(%rip),%rdi
call   1040 <scanf@plt>
mov    0x2e71(%rip),%rcx
cmp    (%rcx),%rax
je     119c <main+0x6c>
lea    -0x30(%rbp),%rdi
call   1050 <isValid@plt>
mov    %eax,%esi
lea    0xe6e(%rip),%rdi
call   1030 <printf@plt>
jmp    1160 <main+0x30>
mov    $0x1,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
sub    $0x18,%rsp
lea    0xec1(%rip),%rdi
call   1050 <isValid@plt>
lea    0xeb2(%rip),%rdi
mov    %eax,%esi
call   1030 <printf@plt>
lea    0xea8(%rip),%rdi
mov    %rsp,%rsi
call   1040 <scanf@plt>
mov    0x2e7d(%rip),%r12
cmp    (%r12),%rax
je     11b3 <main+0x83>
mov    %rsp,%rbx
lea    0xe85(%rip),%r14
lea    0xe82(%rip),%r15
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
mov    %rbx,%rdi
call   1050 <isValid@plt>
mov    %r14,%rdi
mov    %eax,%esi
call   1030 <printf@plt>
mov    %r15,%rdi
mov    %rbx,%rsi
call   1040 <scanf@plt>
cmp    (%r12),%rax
jne    1190 <main+0x60>
mov    $0x1,%eax
add    $0x18,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [4 x i8] c"%d\0A\00"
@.str.1 = [1 x i8] zeroinitializer
@.str.2 = [3 x i8] c"%s\00"
@EOF = global i64 0
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca [20 x i8]
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = call i32 @isValid(i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.1, i64 0, i64 0))
%8 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %7)
br label %9
9: ; preds = %14, %2
%10 = getelementptr inbounds [20 x i8], [20 x i8]* %6, i64 0, i64 0
%11 = call i64 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i8* %10)
%12 = load i64, i64* @EOF
%13 = icmp ne i64 %11, %12
br i1 %13, label %14, label %18
14: ; preds = %9
%15 = getelementptr inbounds [20 x i8], [20 x i8]* %6, i64 0, i64 0
%16 = call i32 @isValid(i8* %15)
%17 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %16)
br label %9
18: ; preds = %9
ret i32 1
}

LLVM IR (-O2):
@.str = [4 x i8] c"%d\0A\00"
@.str.1 = [1 x i8] zeroinitializer
@.str.2 = [3 x i8] c"%s\00"
@EOF = global i64 0
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca [20 x i8]
%4 = getelementptr inbounds [20 x i8], [20 x i8]* %3, i64 0, i64 0
%5 = tail call i32 @isValid(i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.1, i64 0, i64 0))
%6 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %5)
%7 = call i64 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i8* %4)
%8 = load i64, i64* @EOF
%9 = icmp eq i64 %7, %8
br i1 %9, label %16, label %10
10: ; preds = %2, %10
%11 = call i32 @isValid(i8* %4)
%12 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %11)
%13 = call i64 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i8* %4)
%14 = load i64, i64* @EOF
%15 = icmp eq i64 %13, %14
br i1 %15, label %16, label %10
16: ; preds = %10, %2
ret i32 1
}