#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 */
int /*<<< orphan*/ printf(char *);
void sigroutine(int dunno) {
  switch (dunno) {
  case 1:
    printf("Get signal --SIGUP\n");
    break;
  case 2:
    printf("Get a signal -- SIGINT\n");
    break;
  case 3:
    printf("Get a signal --SIGQUIT\n");
    break;
  }
  return;
}


x86 assembly (clang, -O0):
<sigroutine>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %edi,-0x4(%rbp)
mov    -0x4(%rbp),%eax
mov    %eax,-0x8(%rbp)
sub    $0x1,%eax
je     1151 <sigroutine+0x41>
jmp    112f <sigroutine+0x1f>
mov    -0x8(%rbp),%eax
sub    $0x2,%eax
je     1162 <sigroutine+0x52>
jmp    1140 <sigroutine+0x30>
mov    -0x8(%rbp),%eax
sub    $0x3,%eax
je     1173 <sigroutine+0x63>
jmp    117f <sigroutine+0x6f>
lea    0xea8(%rip),%rdi
call   1030 <printf@plt>
jmp    117f <sigroutine+0x6f>
lea    0xeab(%rip),%rdi
call   1030 <printf@plt>
jmp    117f <sigroutine+0x6f>
lea    0xeb2(%rip),%rdi
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<sigroutine>:
add    $0xffffffff,%edi
cmp    $0x2,%edi
ja     112e <sigroutine+0x1e>
movslq %edi,%rax
lea    0xf22(%rip),%rcx
movslq (%rcx,%rax,4),%rdi
add    %rcx,%rdi
jmp    1030 <puts@plt>
ret

LLVM IR (-O0):
@.str = [20 x i8] c"Get signal --SIGUP\0A\00"
@.str.1 = [24 x i8] c"Get a signal -- SIGINT\0A\00"
@.str.2 = [24 x i8] c"Get a signal --SIGQUIT\0A\00"
define void @sigroutine(i32 %0) {
%2 = alloca i32
store i32 %0, i32* %2
%3 = load i32, i32* %2
switch i32 %3, label %10 [
i32 1, label %4
i32 2, label %6
i32 3, label %8
]
4: ; preds = %1
%5 = call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0))
br label %10
6: ; preds = %1
%7 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.1, i64 0, i64 0))
br label %10
8: ; preds = %1
%9 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.2, i64 0, i64 0))
br label %10
10: ; preds = %1, %8, %6, %4
ret void
}

LLVM IR (-O2):
@str = [23 x i8] c"Get a signal --SIGQUIT\00"
@str.3 = [23 x i8] c"Get a signal -- SIGINT\00"
@str.4 = [19 x i8] c"Get signal --SIGUP\00"
@reltable.sigroutine = [3 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([19 x i8]* @str.4 to i64), i64 ptrtoint ([3 x i32]* @reltable.sigroutine to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([23 x i8]* @str.3 to i64), i64 ptrtoint ([3 x i32]* @reltable.sigroutine to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([23 x i8]* @str to i64), i64 ptrtoint ([3 x i32]* @reltable.sigroutine to i64)) to i32)]
define void @sigroutine(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 3
br i1 %3, label %4, label %9
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = shl i64 %5, 2
%7 = call i8* @llvm.load.relative.i64(i8* bitcast ([3 x i32]* @reltable.sigroutine to i8*), i64 %6)
%8 = tail call i32 @puts(i8* dereferenceable(1) %7)
br label %9
9: ; preds = %1, %4
ret void
}