#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*/ keywords;
typedef int int64_t;

/* Variables and functions */
int match_words(char const *, char const *, char const **, int const);
int64_t match_c_keyword(const char *str, const char *beginning_of_line) {
  static const char *keywords[] = {
      "__thread", "auto",   "case",   "default",  "do",     "else",
      "enum",     "extern", "false",  "for",      "if",     "inline",
      "register", "sizeof", "static", "struct",   "switch", "true",
      "typedef",  "typeof", "union",  "volatile", "while",
  };
  static const int64_t keyword_count = sizeof(keywords) / sizeof(keywords[0]);
  return match_words(str, beginning_of_line, keywords, keyword_count);
}


x86 assembly (clang, -O0):
<match_c_keyword>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x8(%rbp),%rdi
mov    -0x10(%rbp),%rsi
lea    0x2f01(%rip),%rdx
mov    $0x17,%ecx
call   1030 <match_words@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<match_c_keyword>:
lea    0x2f19(%rip),%rdx
mov    $0x17,%ecx
jmp    1030 <match_words@plt>

LLVM IR (-O0):
@match_c_keyword.keywords = internal global [23 x i8*] [i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i32 0, i32 0), i8* getelementptr inbounds ([5 x i8], [5 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 ([8 x i8], [8 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 ([5 x i8], [5 x i8]* @.str.6, i32 0, i32 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.7, i32 0, i32 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.8, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.9, i32 0, i32 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.10, i32 0, i32 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.11, i32 0, i32 0), i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.12, i32 0, i32 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.13, i32 0, i32 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.14, i32 0, i32 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.15, i32 0, i32 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.16, i32 0, i32 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.17, i32 0, i32 0), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.18, i32 0, i32 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.19, i32 0, i32 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.20, i32 0, i32 0), i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.21, i32 0, i32 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.22, i32 0, i32 0)]
@.str = [9 x i8] c"__thread\00"
@.str.1 = [5 x i8] c"auto\00"
@.str.2 = [5 x i8] c"case\00"
@.str.3 = [8 x i8] c"default\00"
@.str.4 = [3 x i8] c"do\00"
@.str.5 = [5 x i8] c"else\00"
@.str.6 = [5 x i8] c"enum\00"
@.str.7 = [7 x i8] c"extern\00"
@.str.8 = [6 x i8] c"false\00"
@.str.9 = [4 x i8] c"for\00"
@.str.10 = [3 x i8] c"if\00"
@.str.11 = [7 x i8] c"inline\00"
@.str.12 = [9 x i8] c"register\00"
@.str.13 = [7 x i8] c"sizeof\00"
@.str.14 = [7 x i8] c"static\00"
@.str.15 = [7 x i8] c"struct\00"
@.str.16 = [7 x i8] c"switch\00"
@.str.17 = [5 x i8] c"true\00"
@.str.18 = [8 x i8] c"typedef\00"
@.str.19 = [7 x i8] c"typeof\00"
@.str.20 = [6 x i8] c"union\00"
@.str.21 = [9 x i8] c"volatile\00"
@.str.22 = [6 x i8] c"while\00"
@match_c_keyword.keyword_count = internal constant i32 23
define i32 @match_c_keyword(i8* %0, i8* %1) {
%3 = alloca i8*
%4 = alloca i8*
store i8* %0, i8** %3
store i8* %1, i8** %4
%5 = load i8*, i8** %3
%6 = load i8*, i8** %4
%7 = call i32 @match_words(i8* %5, i8* %6, i8** getelementptr inbounds ([23 x i8*], [23 x i8*]* @match_c_keyword.keywords, i64 0, i64 0), i32 23)
ret i32 %7
}

LLVM IR (-O2):
@match_c_keyword.keywords = internal global [23 x i8*] [i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str, i32 0, i32 0), i8* getelementptr inbounds ([5 x i8], [5 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 ([8 x i8], [8 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 ([5 x i8], [5 x i8]* @.str.6, i32 0, i32 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.7, i32 0, i32 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.8, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.9, i32 0, i32 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.10, i32 0, i32 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.11, i32 0, i32 0), i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.12, i32 0, i32 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.13, i32 0, i32 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.14, i32 0, i32 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.15, i32 0, i32 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.16, i32 0, i32 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.17, i32 0, i32 0), i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.18, i32 0, i32 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.19, i32 0, i32 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.20, i32 0, i32 0), i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.21, i32 0, i32 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.22, i32 0, i32 0)]
@.str = [9 x i8] c"__thread\00"
@.str.1 = [5 x i8] c"auto\00"
@.str.2 = [5 x i8] c"case\00"
@.str.3 = [8 x i8] c"default\00"
@.str.4 = [3 x i8] c"do\00"
@.str.5 = [5 x i8] c"else\00"
@.str.6 = [5 x i8] c"enum\00"
@.str.7 = [7 x i8] c"extern\00"
@.str.8 = [6 x i8] c"false\00"
@.str.9 = [4 x i8] c"for\00"
@.str.10 = [3 x i8] c"if\00"
@.str.11 = [7 x i8] c"inline\00"
@.str.12 = [9 x i8] c"register\00"
@.str.13 = [7 x i8] c"sizeof\00"
@.str.14 = [7 x i8] c"static\00"
@.str.15 = [7 x i8] c"struct\00"
@.str.16 = [7 x i8] c"switch\00"
@.str.17 = [5 x i8] c"true\00"
@.str.18 = [8 x i8] c"typedef\00"
@.str.19 = [7 x i8] c"typeof\00"
@.str.20 = [6 x i8] c"union\00"
@.str.21 = [9 x i8] c"volatile\00"
@.str.22 = [6 x i8] c"while\00"
define i32 @match_c_keyword(i8* %0, i8* %1) {
%3 = tail call i32 @match_words(i8* %0, i8* %1, i8** getelementptr inbounds ([23 x i8*], [23 x i8*]* @match_c_keyword.keywords, i64 0, i64 0), i32 23)
ret i32 %3
}