#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 */
scalar_t__ strcmp(char const *, char *);
char key_string2char(const char *buf) {
  if (strcmp(buf, "tab") == 0)
    return '\t';
  if (strcmp(buf, "enter") == 0)
    return '\n';
  if (strcmp(buf, "space") == 0)
    return ' ';
  if (strcmp(buf, "backspace") == 0)
    return '\b';
  if (strcmp(buf, "esc") == 0)
    return 27;
  if (strcmp(buf, "delete") == 0)
    return 127;
  return *buf;
}


x86 assembly (clang, -O0):
<key_string2char>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xed9(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    113f <key_string2char+0x2f>
movb   $0x9,-0x1(%rbp)
jmp    11f7 <key_string2char+0xe7>
mov    -0x10(%rbp),%rdi
lea    0xeba(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    1162 <key_string2char+0x52>
movb   $0xa,-0x1(%rbp)
jmp    11f7 <key_string2char+0xe7>
mov    -0x10(%rbp),%rdi
lea    0xea1(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    1185 <key_string2char+0x75>
movb   $0x20,-0x1(%rbp)
jmp    11f7 <key_string2char+0xe7>
mov    -0x10(%rbp),%rdi
lea    0xe7a(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    11a8 <key_string2char+0x98>
movb   $0x8,-0x1(%rbp)
jmp    11f7 <key_string2char+0xe7>
mov    -0x10(%rbp),%rdi
lea    0xe61(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    11cb <key_string2char+0xbb>
movb   $0x1b,-0x1(%rbp)
jmp    11f7 <key_string2char+0xe7>
mov    -0x10(%rbp),%rdi
lea    0xe42(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    11ee <key_string2char+0xde>
movb   $0x7f,-0x1(%rbp)
jmp    11f7 <key_string2char+0xe7>
mov    -0x10(%rbp),%rax
mov    (%rax),%al
mov    %al,-0x1(%rbp)
movsbl -0x1(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<key_string2char>:
push   %rbx
mov    %rdi,%rbx
lea    0xee5(%rip),%rsi
call   1030 <strcmp@plt>
test   %rax,%rax
je     118d <key_string2char+0x7d>
lea    0xed8(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     1191 <key_string2char+0x81>
lea    0xece(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     1195 <key_string2char+0x85>
lea    0xeb6(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     1199 <key_string2char+0x89>
lea    0xeac(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     119d <key_string2char+0x8d>
lea    0xe9c(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     11a1 <key_string2char+0x91>
mov    (%rbx),%al
pop    %rbx
ret
mov    $0x9,%al
pop    %rbx
ret
mov    $0xa,%al
pop    %rbx
ret
mov    $0x20,%al
pop    %rbx
ret
mov    $0x8,%al
pop    %rbx
ret
mov    $0x1b,%al
pop    %rbx
ret
mov    $0x7f,%al
pop    %rbx
ret

LLVM IR (-O0):
@.str = [4 x i8] c"tab\00"
@.str.1 = [6 x i8] c"enter\00"
@.str.2 = [6 x i8] c"space\00"
@.str.3 = [10 x i8] c"backspace\00"
@.str.4 = [4 x i8] c"esc\00"
@.str.5 = [7 x i8] c"delete\00"
define signext i8 @key_string2char(i8* %0) {
%2 = alloca i8
%3 = alloca i8*
store i8* %0, i8** %3
%4 = load i8*, i8** %3
%5 = call i64 @strcmp(i8* %4, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
%6 = icmp eq i64 %5, 0
br i1 %6, label %7, label %8
7: ; preds = %1
store i8 9, i8* %2
br label %36
8: ; preds = %1
%9 = load i8*, i8** %3
%10 = call i64 @strcmp(i8* %9, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0))
%11 = icmp eq i64 %10, 0
br i1 %11, label %12, label %13
12: ; preds = %8
store i8 10, i8* %2
br label %36
13: ; preds = %8
%14 = load i8*, i8** %3
%15 = call i64 @strcmp(i8* %14, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0))
%16 = icmp eq i64 %15, 0
br i1 %16, label %17, label %18
17: ; preds = %13
store i8 32, i8* %2
br label %36
18: ; preds = %13
%19 = load i8*, i8** %3
%20 = call i64 @strcmp(i8* %19, i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0))
%21 = icmp eq i64 %20, 0
br i1 %21, label %22, label %23
22: ; preds = %18
store i8 8, i8* %2
br label %36
23: ; preds = %18
%24 = load i8*, i8** %3
%25 = call i64 @strcmp(i8* %24, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0))
%26 = icmp eq i64 %25, 0
br i1 %26, label %27, label %28
27: ; preds = %23
store i8 27, i8* %2
br label %36
28: ; preds = %23
%29 = load i8*, i8** %3
%30 = call i64 @strcmp(i8* %29, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0))
%31 = icmp eq i64 %30, 0
br i1 %31, label %32, label %33
32: ; preds = %28
store i8 127, i8* %2
br label %36
33: ; preds = %28
%34 = load i8*, i8** %3
%35 = load i8, i8* %34
store i8 %35, i8* %2
br label %36
36: ; preds = %33, %32, %27, %22, %17, %12, %7
%37 = load i8, i8* %2
ret i8 %37
}

LLVM IR (-O2):
@.str = [4 x i8] c"tab\00"
@.str.1 = [6 x i8] c"enter\00"
@.str.2 = [6 x i8] c"space\00"
@.str.3 = [10 x i8] c"backspace\00"
@.str.4 = [4 x i8] c"esc\00"
@.str.5 = [7 x i8] c"delete\00"
define signext i8 @key_string2char(i8* %0) {
%2 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
%3 = icmp eq i64 %2, 0
br i1 %3, label %21, 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 %21, label %7
7: ; preds = %4
%8 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0))
%9 = icmp eq i64 %8, 0
br i1 %9, label %21, label %10
10: ; preds = %7
%11 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0))
%12 = icmp eq i64 %11, 0
br i1 %12, label %21, label %13
13: ; preds = %10
%14 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0))
%15 = icmp eq i64 %14, 0
br i1 %15, label %21, label %16
16: ; preds = %13
%17 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0))
%18 = icmp eq i64 %17, 0
br i1 %18, label %21, label %19
19: ; preds = %16
%20 = load i8, i8* %0
br label %21
21: ; preds = %16, %13, %10, %7, %4, %1, %19
%22 = phi i8 [ %20, %19 ], [ 9, %1 ], [ 10, %4 ], [ 32, %7 ], [ 8, %10 ], [ 27, %13 ], [ 127, %16 ]
ret i8 %22
}