#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 */
#define SIGABRT 146
#define SIGALRM 145
#define SIGCHLD 144
#define SIGCONT 143
#define SIGFPE 142
#define SIGHUP 141
#define SIGILL 140
#define SIGINT 139
#define SIGKILL 138
#define SIGPIPE 137
#define SIGQUIT 136
#define SIGSEGV 135
#define SIGSTOP 134
#define SIGTERM 133
#define SIGTSTP 132
#define SIGTTIN 131
#define SIGTTOU 130
#define SIGUSR1 129
#define SIGUSR2 128
const char *signaltoname(int sig) {
  switch (sig) {
  case SIGHUP:
    return "HUP";
  case SIGINT:
    return "INT";
  case SIGQUIT:
    return "QUIT";
  case SIGILL:
    return "ILL";
  case SIGABRT:
    return "ABRT";
  case SIGFPE:
    return "FPE";
  case SIGKILL:
    return "KILL";
  case SIGSEGV:
    return "SEGV";
  case SIGPIPE:
    return "PIPE";
  case SIGALRM:
    return "ALRM";
  case SIGTERM:
    return "TERM";
  case SIGUSR1:
    return "USR1";
  case SIGUSR2:
    return "USR2";
  case SIGCHLD:
    return "CHLD";
  case SIGCONT:
    return "CONT";
  case SIGSTOP:
    return "STOP";
  case SIGTSTP:
    return "TSTP";
  case SIGTTIN:
    return "TTIN";
  case SIGTTOU:
    return "TTOU";
  default:
    return 0;
  }
}


x86 assembly (clang, -O0):
<signaltoname>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
add    $0xffffff80,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x12,%eax
ja     1260 <signaltoname+0x160>
mov    -0x18(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xf15(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xf09(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xefd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xefc(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xee2(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xed7(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xecb(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xec0(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xeb5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xeaa(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xe9f(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xe94(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xe89(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xe7e(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xe73(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xe68(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xe5d(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xe52(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
lea    0xe47(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1268 <signaltoname+0x168>
movq   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<signaltoname>:
add    $0xffffff80,%edi
cmp    $0x12,%edi
ja     111a <signaltoname+0x1a>
movslq %edi,%rax
lea    0xf46(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
xor    %eax,%eax
ret

LLVM IR (-O0):
@.str = [4 x i8] c"HUP\00"
@.str.1 = [4 x i8] c"INT\00"
@.str.2 = [5 x i8] c"QUIT\00"
@.str.3 = [4 x i8] c"ILL\00"
@.str.4 = [5 x i8] c"ABRT\00"
@.str.5 = [4 x i8] c"FPE\00"
@.str.6 = [5 x i8] c"KILL\00"
@.str.7 = [5 x i8] c"SEGV\00"
@.str.8 = [5 x i8] c"PIPE\00"
@.str.9 = [5 x i8] c"ALRM\00"
@.str.10 = [5 x i8] c"TERM\00"
@.str.11 = [5 x i8] c"USR1\00"
@.str.12 = [5 x i8] c"USR2\00"
@.str.13 = [5 x i8] c"CHLD\00"
@.str.14 = [5 x i8] c"CONT\00"
@.str.15 = [5 x i8] c"STOP\00"
@.str.16 = [5 x i8] c"TSTP\00"
@.str.17 = [5 x i8] c"TTIN\00"
@.str.18 = [5 x i8] c"TTOU\00"
define i8* @signaltoname(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %24 [
i32 141, label %5
i32 139, label %6
i32 136, label %7
i32 140, label %8
i32 146, label %9
i32 142, label %10
i32 138, label %11
i32 135, label %12
i32 137, label %13
i32 145, label %14
i32 133, label %15
i32 129, label %16
i32 128, label %17
i32 144, label %18
i32 143, label %19
i32 134, label %20
i32 132, label %21
i32 131, label %22
i32 130, label %23
]
5: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i8** %2
br label %25
6: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %25
7: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %25
8: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %25
9: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %25
10: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %25
11: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %25
12: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %25
13: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.8, i64 0, i64 0), i8** %2
br label %25
14: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.9, i64 0, i64 0), i8** %2
br label %25
15: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.10, i64 0, i64 0), i8** %2
br label %25
16: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.11, i64 0, i64 0), i8** %2
br label %25
17: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.12, i64 0, i64 0), i8** %2
br label %25
18: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.13, i64 0, i64 0), i8** %2
br label %25
19: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.14, i64 0, i64 0), i8** %2
br label %25
20: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.15, i64 0, i64 0), i8** %2
br label %25
21: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.16, i64 0, i64 0), i8** %2
br label %25
22: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.17, i64 0, i64 0), i8** %2
br label %25
23: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.18, i64 0, i64 0), i8** %2
br label %25
24: ; preds = %1
store i8* null, i8** %2
br label %25
25: ; preds = %24, %23, %22, %21, %20, %19, %18, %17, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%26 = load i8*, i8** %2
ret i8* %26
}

LLVM IR (-O2):
@.str = [4 x i8] c"HUP\00"
@.str.1 = [4 x i8] c"INT\00"
@.str.2 = [5 x i8] c"QUIT\00"
@.str.3 = [4 x i8] c"ILL\00"
@.str.4 = [5 x i8] c"ABRT\00"
@.str.5 = [4 x i8] c"FPE\00"
@.str.6 = [5 x i8] c"KILL\00"
@.str.7 = [5 x i8] c"SEGV\00"
@.str.8 = [5 x i8] c"PIPE\00"
@.str.9 = [5 x i8] c"ALRM\00"
@.str.10 = [5 x i8] c"TERM\00"
@.str.11 = [5 x i8] c"USR1\00"
@.str.12 = [5 x i8] c"USR2\00"
@.str.13 = [5 x i8] c"CHLD\00"
@.str.14 = [5 x i8] c"CONT\00"
@.str.15 = [5 x i8] c"STOP\00"
@.str.16 = [5 x i8] c"TSTP\00"
@.str.17 = [5 x i8] c"TTIN\00"
@.str.18 = [5 x i8] c"TTOU\00"
@reltable.signaltoname = [19 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.12 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.11 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.18 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.17 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.16 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.10 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.15 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.7 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.2 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.8 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.6 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.1 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.3 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str.5 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.14 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.13 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.9 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.4 to i64), i64 ptrtoint ([19 x i32]* @reltable.signaltoname to i64)) to i32)]
define i8* @signaltoname(i32 %0) {
%2 = add i32 %0, -128
%3 = icmp ult i32 %2, 19
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = shl i64 %5, 2
%7 = call i8* @llvm.load.relative.i64(i8* bitcast ([19 x i32]* @reltable.signaltoname to i8*), i64 %6)
br label %8
8: ; preds = %1, %4
%9 = phi i8* [ %7, %4 ], [ null, %1 ]
ret i8* %9
}