#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 */
typedef int /*<<< orphan*/ ts;

/* Variables and functions */
scalar_t__ strcmp(char const *, char const *);
int knowntok(const char *c) {
  const char *ts[] = {"north", "south", "east",      "west",
                      "up",    "down",  "notesfiles"};
  for (int i = 0; i < (sizeof(ts) / sizeof((ts)[0])); i++)
    if ((strcmp((c), (ts[i])) == 0))
      return 1;
  return 0;
}


x86 assembly (clang, -O0):
<knowntok>:
push   %rbp
mov    %rsp,%rbp
sub    $0x60,%rsp
mov    %rdi,-0x10(%rbp)
lea    -0x50(%rbp),%rdi
lea    0x2ca9(%rip),%rsi
mov    $0x38,%edx
call   1040 <memcpy@plt>
movl   $0x0,-0x54(%rbp)
movslq -0x54(%rbp),%rax
cmp    $0x7,%rax
jae    1191 <knowntok+0x71>
mov    -0x10(%rbp),%rdi
movslq -0x54(%rbp),%rax
mov    -0x50(%rbp,%rax,8),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    117e <knowntok+0x5e>
movl   $0x1,-0x4(%rbp)
jmp    1198 <knowntok+0x78>
jmp    1183 <knowntok+0x63>
mov    -0x54(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x54(%rbp)
jmp    1148 <knowntok+0x28>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x60,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<knowntok>:
push   %rbp
push   %rbx
push   %rax
mov    %rdi,%rbx
lea    0xee3(%rip),%rsi
call   1030 <strcmp@plt>
mov    $0x1,%ebp
test   %rax,%rax
je     11a8 <knowntok+0x98>
lea    0xed3(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     11a8 <knowntok+0x98>
lea    0xec5(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     11a8 <knowntok+0x98>
lea    0xeb6(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     11a8 <knowntok+0x98>
lea    0xea7(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     11a8 <knowntok+0x98>
lea    0xe96(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     11a8 <knowntok+0x98>
lea    0xe87(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
xor    %ebp,%ebp
test   %rax,%rax
sete   %bpl
mov    %ebp,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [6 x i8] c"north\00"
@.str.1 = [6 x i8] c"south\00"
@.str.2 = [5 x i8] c"east\00"
@.str.3 = [5 x i8] c"west\00"
@.str.4 = [3 x i8] c"up\00"
@.str.5 = [5 x i8] c"down\00"
@.str.6 = [11 x i8] c"notesfiles\00"
@__const.knowntok.ts = [7 x i8*] [i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i32 0, i32 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i32 0, i32 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i32 0, i32 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i32 0, i32 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i32 0, i32 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.5, i32 0, i32 0), i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.6, i32 0, i32 0)]
define i32 @knowntok(i8* %0) {
%2 = alloca i32
%3 = alloca i8*
%4 = alloca [7 x i8*]
%5 = alloca i32
store i8* %0, i8** %3
%6 = bitcast [7 x i8*]* %4 to i8*
store i32 0, i32* %5
br label %7
7: ; preds = %21, %1
%8 = load i32, i32* %5
%9 = sext i32 %8 to i64
%10 = icmp ult i64 %9, 7
br i1 %10, label %11, label %24
11: ; preds = %7
%12 = load i8*, i8** %3
%13 = load i32, i32* %5
%14 = sext i32 %13 to i64
%15 = getelementptr inbounds [7 x i8*], [7 x i8*]* %4, i64 0, i64 %14
%16 = load i8*, i8** %15
%17 = call i64 @strcmp(i8* %12, i8* %16)
%18 = icmp eq i64 %17, 0
br i1 %18, label %19, label %20
19: ; preds = %11
store i32 1, i32* %2
br label %25
20: ; preds = %11
br label %21
21: ; preds = %20
%22 = load i32, i32* %5
%23 = add nsw i32 %22, 1
store i32 %23, i32* %5
br label %7
24: ; preds = %7
store i32 0, i32* %2
br label %25
25: ; preds = %24, %19
%26 = load i32, i32* %2
ret i32 %26
}

LLVM IR (-O2):
@.str = [6 x i8] c"north\00"
@.str.1 = [6 x i8] c"south\00"
@.str.2 = [5 x i8] c"east\00"
@.str.3 = [5 x i8] c"west\00"
@.str.4 = [3 x i8] c"up\00"
@.str.5 = [5 x i8] c"down\00"
@.str.6 = [11 x i8] c"notesfiles\00"
define i32 @knowntok(i8* %0) {
%2 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str, i64 0, i64 0))
%3 = icmp eq i64 %2, 0
br i1 %3, label %23, label %4
4: ; preds = %1
%5 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0))
%6 = icmp eq i64 %5, 0
br i1 %6, label %23, label %7
7: ; preds = %4
%8 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0))
%9 = icmp eq i64 %8, 0
br i1 %9, label %23, label %10
10: ; preds = %7
%11 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i64 0, i64 0))
%12 = icmp eq i64 %11, 0
br i1 %12, label %23, label %13
13: ; preds = %10
%14 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0))
%15 = icmp eq i64 %14, 0
br i1 %15, label %23, label %16
16: ; preds = %13
%17 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.5, i64 0, i64 0))
%18 = icmp eq i64 %17, 0
br i1 %18, label %23, label %19
19: ; preds = %16
%20 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.6, i64 0, i64 0))
%21 = icmp eq i64 %20, 0
%22 = zext i1 %21 to i32
br label %23
23: ; preds = %19, %16, %13, %10, %7, %4, %1
%24 = phi i32 [ 1, %1 ], [ 1, %4 ], [ 1, %7 ], [ 1, %10 ], [ 1, %13 ], [ 1, %16 ], [ %22, %19 ]
ret i32 %24
}