#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*/ isdigit(char);
int strlen(char *);
int isnumstr(char *str) {
  int i;
  if (str[0] == '-') {
    return (0);
  }
  for (i = 0; i < strlen(str); i++) {
    if (!isdigit(str[(int)i])) {
      return (0);
    }
  }
  return (1);
}


x86 assembly (clang, -O0):
<isnumstr>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rax
movsbl (%rax),%eax
cmp    $0x2d,%eax
jne    1148 <isnumstr+0x28>
movl   $0x0,-0x4(%rbp)
jmp    11ab <isnumstr+0x8b>
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
mov    %eax,-0x18(%rbp)
mov    -0x10(%rbp),%rdi
call   1040 <strlen@plt>
mov    %eax,%ecx
mov    -0x18(%rbp),%eax
cmp    %ecx,%eax
jge    11a4 <isnumstr+0x84>
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
movsbl (%rax,%rcx,1),%edi
call   1030 <isdigit@plt>
cmp    $0x0,%eax
jne    1191 <isnumstr+0x71>
movl   $0x0,-0x4(%rbp)
jmp    11ab <isnumstr+0x8b>
jmp    1196 <isnumstr+0x76>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    114f <isnumstr+0x2f>
movl   $0x1,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<isnumstr>:
push   %rbp
push   %r14
push   %rbx
xor    %r14d,%r14d
cmpb   $0x2d,(%rdi)
je     1165 <isnumstr+0x45>
mov    %rdi,%rbx
call   1040 <strlen@plt>
mov    $0x1,%r14d
test   %eax,%eax
jle    1165 <isnumstr+0x45>
xor    %ebp,%ebp
movsbl (%rbx,%rbp,1),%edi
call   1030 <isdigit@plt>
test   %eax,%eax
je     1162 <isnumstr+0x42>
add    $0x1,%rbp
mov    %rbx,%rdi
call   1040 <strlen@plt>
cltq
cmp    %rax,%rbp
jl     1140 <isnumstr+0x20>
jmp    1165 <isnumstr+0x45>
xor    %r14d,%r14d
mov    %r14d,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
define i32 @isnumstr(i8* %0) {
%2 = alloca i32
%3 = alloca i8*
%4 = alloca i32
store i8* %0, i8** %3
%5 = load i8*, i8** %3
%6 = getelementptr inbounds i8, i8* %5, i64 0
%7 = load i8, i8* %6
%8 = sext i8 %7 to i32
%9 = icmp eq i32 %8, 45
br i1 %9, label %10, label %11
10: ; preds = %1
store i32 0, i32* %2
br label %31
11: ; preds = %1
store i32 0, i32* %4
br label %12
12: ; preds = %27, %11
%13 = load i32, i32* %4
%14 = load i8*, i8** %3
%15 = call i32 @strlen(i8* %14)
%16 = icmp slt i32 %13, %15
br i1 %16, label %17, label %30
17: ; preds = %12
%18 = load i8*, i8** %3
%19 = load i32, i32* %4
%20 = sext i32 %19 to i64
%21 = getelementptr inbounds i8, i8* %18, i64 %20
%22 = load i8, i8* %21
%23 = call i32 @isdigit(i8 signext %22)
%24 = icmp ne i32 %23, 0
br i1 %24, label %26, label %25
25: ; preds = %17
store i32 0, i32* %2
br label %31
26: ; preds = %17
br label %27
27: ; preds = %26
%28 = load i32, i32* %4
%29 = add nsw i32 %28, 1
store i32 %29, i32* %4
br label %12
30: ; preds = %12
store i32 1, i32* %2
br label %31
31: ; preds = %30, %25, %10
%32 = load i32, i32* %2
ret i32 %32
}

LLVM IR (-O2):
define i32 @isnumstr(i8* %0) {
%2 = load i8, i8* %0
%3 = icmp eq i8 %2, 45
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 = tail call i32 @isdigit(i8 signext %14)
%16 = icmp eq i32 %15, 0
%17 = add nuw nsw i64 %12, 1
br i1 %16, label %18, label %7
18: ; preds = %11, %7, %4, %1
%19 = phi i32 [ 0, %1 ], [ 1, %4 ], [ 0, %11 ], [ 1, %7 ]
ret i32 %19
}