#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__ isValid(char *);
int /*<<< orphan*/ printf(char *, char *);
int main(int argc, char *argv[]) {
  if (argc != 2) {
    printf("Usage: %s ISBN\n", argv[0]);
    return 1;
  }
  char *ISBN = argv[1];
  if (isValid(ISBN)) {
    printf("%s is a valid ISBN code\n", ISBN);
  } else {
    printf("%s is not a valid ISBN code\n", ISBN);
  }
  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   $0x2,-0x8(%rbp)
je     115f <main+0x3f>
mov    -0x10(%rbp),%rax
mov    (%rax),%rsi
lea    0xeb2(%rip),%rdi
call   1030 <printf@plt>
movl   $0x1,-0x4(%rbp)
jmp    11aa <main+0x8a>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rax
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rdi
call   1040 <isValid@plt>
cmp    $0x0,%rax
je     1193 <main+0x73>
mov    -0x18(%rbp),%rsi
lea    0xe87(%rip),%rdi
call   1030 <printf@plt>
jmp    11a3 <main+0x83>
mov    -0x18(%rbp),%rsi
lea    0xe8b(%rip),%rdi
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x2,%edi
jne    1140 <main+0x20>
mov    0x8(%rsi),%rbx
mov    %rbx,%rdi
call   1040 <isValid@plt>
test   %rax,%rax
je     1156 <main+0x36>
lea    0xed2(%rip),%rdi
jmp    115d <main+0x3d>
mov    (%rsi),%rsi
lea    0xeb6(%rip),%rdi
call   1030 <printf@plt>
mov    $0x1,%eax
pop    %rbx
ret
lea    0xecc(%rip),%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [16 x i8] c"Usage: %s ISBN\0A\00"
@.str.1 = [25 x i8] c"%s is a valid ISBN code\0A\00"
@.str.2 = [29 x i8] c"%s is not a valid ISBN code\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i8*
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp ne i32 %7, 2
br i1 %8, label %9, label %14
9: ; preds = %2
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 0
%12 = load i8*, i8** %11
%13 = call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i8* %12)
store i32 1, i32* %3
br label %28
14: ; preds = %2
%15 = load i8**, i8*** %5
%16 = getelementptr inbounds i8*, i8** %15, i64 1
%17 = load i8*, i8** %16
store i8* %17, i8** %6
%18 = load i8*, i8** %6
%19 = call i64 @isValid(i8* %18)
%20 = icmp ne i64 %19, 0
br i1 %20, label %21, label %24
21: ; preds = %14
%22 = load i8*, i8** %6
%23 = call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.1, i64 0, i64 0), i8* %22)
br label %27
24: ; preds = %14
%25 = load i8*, i8** %6
%26 = call i32 @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.2, i64 0, i64 0), i8* %25)
br label %27
27: ; preds = %24, %21
store i32 0, i32* %3
br label %28
28: ; preds = %27, %9
%29 = load i32, i32* %3
ret i32 %29
}

LLVM IR (-O2):
@.str = [16 x i8] c"Usage: %s ISBN\0A\00"
@.str.1 = [25 x i8] c"%s is a valid ISBN code\0A\00"
@.str.2 = [29 x i8] c"%s is not a valid ISBN code\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %7, label %4
4: ; preds = %2
%5 = load i8*, i8** %1
%6 = tail call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i8* %5)
br label %16
7: ; preds = %2
%8 = getelementptr inbounds i8*, i8** %1, i64 1
%9 = load i8*, i8** %8
%10 = tail call i64 @isValid(i8* %9)
%11 = icmp eq i64 %10, 0
br i1 %11, label %14, label %12
12: ; preds = %7
%13 = tail call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.1, i64 0, i64 0), i8* %9)
br label %16
14: ; preds = %7
%15 = tail call i32 @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.2, i64 0, i64 0), i8* %9)
br label %16
16: ; preds = %12, %14, %4
%17 = phi i32 [ 1, %4 ], [ 0, %14 ], [ 0, %12 ]
ret i32 %17
}