#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 int8_t;

/* Variables and functions */
const char *const dpi_get_error_msg(int8_t error_code) {
  switch (error_code) {
  case -1:
    return "ERROR: The packet is neither IPv4 nor IPv6.";
  case -2:
    return "ERROR: The packet is encrypted using IPSEC. "
           "IPSEC is not supported.";
  case -3:
    return "ERROR: The L3 packet is truncated or corrupted.";
  case -4:
    return "ERROR: The L4 packet is truncated or corrupted.";
  case -5:
    return "ERROR: The transport protocol is not supported.";
  case -6:
    return "ERROR: The maximum number of active flows has been"
           " reached.";
  default:
    return "ERROR: Not existing error code.";
  }
}


x86 assembly (clang, -O0):
<dpi_get_error_msg>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
add    $0x6,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x5,%eax
ja     1190 <dpi_get_error_msg+0x90>
mov    -0x18(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xee1(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119b <dpi_get_error_msg+0x9b>
lea    0xefd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119b <dpi_get_error_msg+0x9b>
lea    0xf31(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119b <dpi_get_error_msg+0x9b>
lea    0xf51(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119b <dpi_get_error_msg+0x9b>
lea    0xf71(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119b <dpi_get_error_msg+0x9b>
lea    0xf91(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    119b <dpi_get_error_msg+0x9b>
lea    0xfbd(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<dpi_get_error_msg>:
cmp    $0xfffffffa,%edi
jb     111a <dpi_get_error_msg+0x1a>
add    $0x6,%edi
movslq %edi,%rax
lea    0x104a(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0x101b(%rip),%rax
ret

LLVM IR (-O0):
@.str = [44 x i8] c"ERROR: The packet is neither IPv4 nor IPv6.\00"
@.str.1 = [68 x i8] c"ERROR: The packet is encrypted using IPSEC. IPSEC is not supported.\00"
@.str.2 = [48 x i8] c"ERROR: The L3 packet is truncated or corrupted.\00"
@.str.3 = [48 x i8] c"ERROR: The L4 packet is truncated or corrupted.\00"
@.str.4 = [48 x i8] c"ERROR: The transport protocol is not supported.\00"
@.str.5 = [60 x i8] c"ERROR: The maximum number of active flows has been reached.\00"
@.str.6 = [32 x i8] c"ERROR: Not existing error code.\00"
define i8* @dpi_get_error_msg(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %11 [
i32 -1, label %5
i32 -2, label %6
i32 -3, label %7
i32 -4, label %8
i32 -5, label %9
i32 -6, label %10
]
5: ; preds = %1
store i8* getelementptr inbounds ([44 x i8], [44 x i8]* @.str, i64 0, i64 0), i8** %2
br label %12
6: ; preds = %1
store i8* getelementptr inbounds ([68 x i8], [68 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %12
7: ; preds = %1
store i8* getelementptr inbounds ([48 x i8], [48 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %12
8: ; preds = %1
store i8* getelementptr inbounds ([48 x i8], [48 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %12
9: ; preds = %1
store i8* getelementptr inbounds ([48 x i8], [48 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %12
10: ; preds = %1
store i8* getelementptr inbounds ([60 x i8], [60 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %12
11: ; preds = %1
store i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.6, i64 0, i64 0), i8** %2
br label %12
12: ; preds = %11, %10, %9, %8, %7, %6, %5
%13 = load i8*, i8** %2
ret i8* %13
}

LLVM IR (-O2):
@.str = [44 x i8] c"ERROR: The packet is neither IPv4 nor IPv6.\00"
@.str.1 = [68 x i8] c"ERROR: The packet is encrypted using IPSEC. IPSEC is not supported.\00"
@.str.2 = [48 x i8] c"ERROR: The L3 packet is truncated or corrupted.\00"
@.str.3 = [48 x i8] c"ERROR: The L4 packet is truncated or corrupted.\00"
@.str.4 = [48 x i8] c"ERROR: The transport protocol is not supported.\00"
@.str.5 = [60 x i8] c"ERROR: The maximum number of active flows has been reached.\00"
@.str.6 = [32 x i8] c"ERROR: Not existing error code.\00"
@reltable.dpi_get_error_msg = [6 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([60 x i8]* @.str.5 to i64), i64 ptrtoint ([6 x i32]* @reltable.dpi_get_error_msg to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([48 x i8]* @.str.4 to i64), i64 ptrtoint ([6 x i32]* @reltable.dpi_get_error_msg to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([48 x i8]* @.str.3 to i64), i64 ptrtoint ([6 x i32]* @reltable.dpi_get_error_msg to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([48 x i8]* @.str.2 to i64), i64 ptrtoint ([6 x i32]* @reltable.dpi_get_error_msg to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([68 x i8]* @.str.1 to i64), i64 ptrtoint ([6 x i32]* @reltable.dpi_get_error_msg to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([44 x i8]* @.str to i64), i64 ptrtoint ([6 x i32]* @reltable.dpi_get_error_msg to i64)) to i32)]
define i8* @dpi_get_error_msg(i32 %0) {
%2 = icmp ugt i32 %0, -7
br i1 %2, label %3, label %8
3: ; preds = %1
%4 = add i32 %0, 6
%5 = sext i32 %4 to i64
%6 = shl i64 %5, 2
%7 = call i8* @llvm.load.relative.i64(i8* bitcast ([6 x i32]* @reltable.dpi_get_error_msg to i8*), i64 %6)
br label %8
8: ; preds = %1, %3
%9 = phi i8* [ %7, %3 ], [ getelementptr inbounds ([32 x i8], [32 x i8]* @.str.6, i64 0, i64 0), %1 ]
ret i8* %9
}