#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 *, char *);
char *strtok(char *, char *);
void teststrtok() {
  char str[] = "root:x::0:root:/root:/bin/bash:";
  char *token;
  token = strtok(str, ":");
  printf("%s\n", token);
  while ((token = strtok(NULL, ":")) != NULL)
    printf("%s\n", token);
}


x86 assembly (clang, -O0):
<teststrtok>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    0xed1(%rip),%rax
mov    %rax,-0x20(%rbp)
mov    0xece(%rip),%rax
mov    %rax,-0x18(%rbp)
mov    0xecb(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    0xec8(%rip),%rax
mov    %rax,-0x8(%rbp)
lea    -0x20(%rbp),%rdi
lea    0xec1(%rip),%rsi
call   1040 <strtok@plt>
mov    %rax,-0x28(%rbp)
mov    -0x28(%rbp),%rsi
lea    0xeaf(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
mov    %eax,%edi
lea    0xe9d(%rip),%rsi
call   1040 <strtok@plt>
mov    %rax,-0x28(%rbp)
cmp    $0x0,%rax
je     11ab <teststrtok+0x8b>
mov    -0x28(%rbp),%rsi
lea    0xe81(%rip),%rdi
call   1030 <printf@plt>
jmp    1178 <teststrtok+0x58>
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<teststrtok>:
push   %r14
push   %rbx
sub    $0x28,%rsp
movaps 0xee2(%rip),%xmm0
movaps %xmm0,0x10(%rsp)
movaps 0xec6(%rip),%xmm0
movaps %xmm0,(%rsp)
lea    0xedb(%rip),%rbx
mov    %rsp,%rdi
mov    %rbx,%rsi
call   1040 <strtok@plt>
lea    0xecb(%rip),%rdi
mov    %rax,%rsi
call   1030 <printf@plt>
xor    %edi,%edi
mov    %rbx,%rsi
call   1040 <strtok@plt>
test   %rax,%rax
je     119a <teststrtok+0x7a>
lea    0xead(%rip),%r14
lea    0xea4(%rip),%rbx
nopl   0x0(%rax)
mov    %r14,%rdi
mov    %rax,%rsi
call   1030 <printf@plt>
xor    %edi,%edi
mov    %rbx,%rsi
call   1040 <strtok@plt>
test   %rax,%rax
jne    1180 <teststrtok+0x60>
add    $0x28,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@__const.teststrtok.str = [32 x i8] c"root:x::0:root:/root:/bin/bash:\00"
@.str = [2 x i8] c":\00"
@.str.1 = [4 x i8] c"%s\0A\00"
define void @teststrtok() {
%1 = alloca [32 x i8]
%2 = alloca i8*
%3 = bitcast [32 x i8]* %1 to i8*
%4 = getelementptr inbounds [32 x i8], [32 x i8]* %1, i64 0, i64 0
%5 = call i8* @strtok(i8* %4, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i8* %5, i8** %2
%6 = load i8*, i8** %2
%7 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %6)
br label %8
8: ; preds = %11, %0
%9 = call i8* @strtok(i8* null, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i8* %9, i8** %2
%10 = icmp ne i8* %9, null
br i1 %10, label %11, label %14
11: ; preds = %8
%12 = load i8*, i8** %2
%13 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %12)
br label %8
14: ; preds = %8
ret void
}

LLVM IR (-O2):
@__const.teststrtok.str = [32 x i8] c"root:x::0:root:/root:/bin/bash:\00"
@.str = [2 x i8] c":\00"
@.str.1 = [4 x i8] c"%s\0A\00"
define void @teststrtok() {
%1 = alloca [32 x i8]
%2 = getelementptr inbounds [32 x i8], [32 x i8]* %1, i64 0, i64 0
%3 = call i8* @strtok(i8* %2, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %3)
%5 = call i8* @strtok(i8* null, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%6 = icmp eq i8* %5, null
br i1 %6, label %12, label %7
7: ; preds = %0, %7
%8 = phi i8* [ %10, %7 ], [ %5, %0 ]
%9 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %8)
%10 = call i8* @strtok(i8* null, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%11 = icmp eq i8* %10, null
br i1 %11, label %12, label %7
12: ; preds = %7, %0
ret void
}