#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 strlen(char *);
bool othello_is_number(char *str) {
  int i;
  if (strlen(str) == 0) {
    return false;
  }
  for (i = 0; i < strlen(str); ++i) {
    if (!(((int)(str[i]) > 47) && ((int)(str[i]) < 58))) {
      ;
      return false;
    }
  }
  return true;
}


x86 assembly (clang, -O0):
<othello_is_number>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
call   1030 <strlen@plt>
cmp    $0x0,%eax
jne    113a <othello_is_number+0x2a>
movl   $0x0,-0x4(%rbp)
jmp    11ad <othello_is_number+0x9d>
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
mov    %eax,-0x18(%rbp)
mov    -0x10(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,%ecx
mov    -0x18(%rbp),%eax
cmp    %ecx,%eax
jge    11a6 <othello_is_number+0x96>
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
movsbl (%rax,%rcx,1),%eax
cmp    $0x2f,%eax
jle    1187 <othello_is_number+0x77>
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
movsbl (%rax,%rcx,1),%eax
cmp    $0x3a,%eax
jl     1193 <othello_is_number+0x83>
movl   $0x0,-0x4(%rbp)
jmp    11ad <othello_is_number+0x9d>
jmp    1198 <othello_is_number+0x88>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1141 <othello_is_number+0x31>
movl   $0x1,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<othello_is_number>:
push   %rbp
push   %r14
push   %rbx
mov    %rdi,%rbx
call   1030 <strlen@plt>
test   %eax,%eax
je     115f <othello_is_number+0x4f>
mov    %rbx,%rdi
call   1030 <strlen@plt>
mov    $0x1,%r14d
test   %eax,%eax
jle    1162 <othello_is_number+0x52>
xor    %ebp,%ebp
cs nopw 0x0(%rax,%rax,1)
xchg   %ax,%ax
movzbl (%rbx,%rbp,1),%eax
add    $0xd0,%al
cmp    $0xa,%al
jae    115f <othello_is_number+0x4f>
add    $0x1,%rbp
mov    %rbx,%rdi
call   1030 <strlen@plt>
cltq
cmp    %rax,%rbp
jl     1140 <othello_is_number+0x30>
jmp    1162 <othello_is_number+0x52>
xor    %r14d,%r14d
mov    %r14d,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
define i32 @othello_is_number(i8* %0) {
%2 = alloca i32
%3 = alloca i8*
%4 = alloca i32
store i8* %0, i8** %3
%5 = load i8*, i8** %3
%6 = call i32 @strlen(i8* %5)
%7 = icmp eq i32 %6, 0
br i1 %7, label %8, label %9
8: ; preds = %1
store i32 0, i32* %2
br label %37
9: ; preds = %1
store i32 0, i32* %4
br label %10
10: ; preds = %33, %9
%11 = load i32, i32* %4
%12 = load i8*, i8** %3
%13 = call i32 @strlen(i8* %12)
%14 = icmp slt i32 %11, %13
br i1 %14, label %15, label %36
15: ; preds = %10
%16 = load i8*, i8** %3
%17 = load i32, i32* %4
%18 = sext i32 %17 to i64
%19 = getelementptr inbounds i8, i8* %16, i64 %18
%20 = load i8, i8* %19
%21 = sext i8 %20 to i32
%22 = icmp sgt i32 %21, 47
br i1 %22, label %23, label %31
23: ; preds = %15
%24 = load i8*, i8** %3
%25 = load i32, i32* %4
%26 = sext i32 %25 to i64
%27 = getelementptr inbounds i8, i8* %24, i64 %26
%28 = load i8, i8* %27
%29 = sext i8 %28 to i32
%30 = icmp slt i32 %29, 58
br i1 %30, label %32, label %31
31: ; preds = %23, %15
store i32 0, i32* %2
br label %37
32: ; preds = %23
br label %33
33: ; preds = %32
%34 = load i32, i32* %4
%35 = add nsw i32 %34, 1
store i32 %35, i32* %4
br label %10
36: ; preds = %10
store i32 1, i32* %2
br label %37
37: ; preds = %36, %31, %8
%38 = load i32, i32* %2
ret i32 %38
}

LLVM IR (-O2):
define i32 @othello_is_number(i8* %0) {
%2 = tail call i32 @strlen(i8* %0)
%3 = icmp eq i32 %2, 0
br i1 %3, label %18, label %4
4: ; preds = %1
%5 = tail call i32 @strlen(i8* %0)
%6 = icmp sgt i32 %5, 0
br i1 %6, label %11, label %18
7: ; preds = %11
%8 = tail call i32 @strlen(i8* %0)
%9 = sext i32 %8 to i64
%10 = icmp slt i64 %17, %9
br i1 %10, label %11, label %18
11: ; preds = %4, %7
%12 = phi i64 [ %17, %7 ], [ 0, %4 ]
%13 = getelementptr inbounds i8, i8* %0, i64 %12
%14 = load i8, i8* %13
%15 = add i8 %14, -48
%16 = icmp ult i8 %15, 10
%17 = add nuw nsw i64 %12, 1
br i1 %16, label %7, label %18
18: ; preds = %11, %7, %4, %1
%19 = phi i32 [ 0, %1 ], [ 1, %4 ], [ 0, %11 ], [ 1, %7 ]
ret i32 %19
}