#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 */
char *strchr(char *, char);
char *athame_tok(char **pointer, char delim) {
  if (*pointer == 0) {
    return 0;
  }
  char *original = *pointer;
  char *loc = strchr(original, delim);
  if (loc == 0) {
    *pointer = 0;
  } else {
    *loc = '\0';
    *pointer = loc + 1;
  }
  return original;
}


x86 assembly (clang, -O0):
<athame_tok>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %sil,%al
mov    %rdi,-0x10(%rbp)
mov    %al,-0x11(%rbp)
mov    -0x10(%rbp),%rax
cmpq   $0x0,(%rax)
jne    113d <athame_tok+0x2d>
movq   $0x0,-0x8(%rbp)
jmp    1192 <athame_tok+0x82>
mov    -0x10(%rbp),%rax
mov    (%rax),%rax
mov    %rax,-0x20(%rbp)
mov    -0x20(%rbp),%rdi
movsbl -0x11(%rbp),%esi
call   1030 <strchr@plt>
mov    %rax,-0x28(%rbp)
cmpq   $0x0,-0x28(%rbp)
jne    1174 <athame_tok+0x64>
mov    -0x10(%rbp),%rax
movq   $0x0,(%rax)
jmp    118a <athame_tok+0x7a>
mov    -0x28(%rbp),%rax
movb   $0x0,(%rax)
mov    -0x28(%rbp),%rcx
add    $0x1,%rcx
mov    -0x10(%rbp),%rax
mov    %rcx,(%rax)
mov    -0x20(%rbp),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<athame_tok>:
push   %r14
push   %rbx
push   %rax
mov    (%rdi),%rbx
test   %rbx,%rbx
je     113e <athame_tok+0x2e>
mov    %rdi,%r14
movsbl %sil,%esi
mov    %rbx,%rdi
call   1030 <strchr@plt>
test   %rax,%rax
je     1139 <athame_tok+0x29>
movb   $0x0,(%rax)
add    $0x1,%rax
jmp    113b <athame_tok+0x2b>
xor    %eax,%eax
mov    %rax,(%r14)
mov    %rbx,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
define i8* @athame_tok(i8** %0, i8 signext %1) {
%3 = alloca i8*
%4 = alloca i8**
%5 = alloca i8
%6 = alloca i8*
%7 = alloca i8*
store i8** %0, i8*** %4
store i8 %1, i8* %5
%8 = load i8**, i8*** %4
%9 = load i8*, i8** %8
%10 = icmp eq i8* %9, null
br i1 %10, label %11, label %12
11: ; preds = %2
store i8* null, i8** %3
br label %29
12: ; preds = %2
%13 = load i8**, i8*** %4
%14 = load i8*, i8** %13
store i8* %14, i8** %6
%15 = load i8*, i8** %6
%16 = load i8, i8* %5
%17 = call i8* @strchr(i8* %15, i8 signext %16)
store i8* %17, i8** %7
%18 = load i8*, i8** %7
%19 = icmp eq i8* %18, null
br i1 %19, label %20, label %22
20: ; preds = %12
%21 = load i8**, i8*** %4
store i8* null, i8** %21
br label %27
22: ; preds = %12
%23 = load i8*, i8** %7
store i8 0, i8* %23
%24 = load i8*, i8** %7
%25 = getelementptr inbounds i8, i8* %24, i64 1
%26 = load i8**, i8*** %4
store i8* %25, i8** %26
br label %27
27: ; preds = %22, %20
%28 = load i8*, i8** %6
store i8* %28, i8** %3
br label %29
29: ; preds = %27, %11
%30 = load i8*, i8** %3
ret i8* %30
}

LLVM IR (-O2):
define i8* @athame_tok(i8** nocapture %0, i8 signext %1) {
%3 = load i8*, i8** %0
%4 = icmp eq i8* %3, null
br i1 %4, label %12, label %5
5: ; preds = %2
%6 = tail call i8* @strchr(i8* %3, i8 signext %1)
%7 = icmp eq i8* %6, null
br i1 %7, label %10, label %8
8: ; preds = %5
store i8 0, i8* %6
%9 = getelementptr inbounds i8, i8* %6, i64 1
br label %10
10: ; preds = %5, %8
%11 = phi i8* [ %9, %8 ], [ null, %5 ]
store i8* %11, i8** %0
br label %12
12: ; preds = %2, %10
ret i8* %3
}