#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 PrintCommStatus(int CommStatus) {
  switch (CommStatus) {
  case (0):
    printf("COMM_TXSUCCESS: Transmit success!\n");
    break;
  case (1):
    printf("COMM_RXSUCCESS: receiving success!\n");
    break;
  case (2):
    printf("COMM_TXFAIL: Failed transmit instruction packet!\n");
    break;
  case (4):
    printf("COMM_TXERROR: Incorrect instruction packet!\n");
    break;
  case (3):
    printf("COMM_RXFAIL: Failed get status packet from device!\n");
    break;
  case (5):
    printf("COMM_RXWAITING: Now receiving status packet!\n");
    break;
  case (6):
    printf("COMM_RXTIMEOUT: There is no status packet!\n");
    break;
  case (7):
    printf("COMM_RXCORRUPT: Incorrect status packet!\n");
    break;
  default:
    printf("This is unknown error code!\n");
    break;
  }
}


x86 assembly (clang, -O0):
<PrintCommStatus>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %edi,-0x4(%rbp)
mov    -0x4(%rbp),%eax
mov    %rax,-0x10(%rbp)
sub    $0x7,%rax
ja     11c8 <PrintCommStatus+0xb8>
mov    -0x10(%rbp),%rax
lea    0xec9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xed9(%rip),%rdi
call   1030 <printf@plt>
jmp    11d4 <PrintCommStatus+0xc4>
lea    0xeeb(%rip),%rdi
call   1030 <printf@plt>
jmp    11d4 <PrintCommStatus+0xc4>
lea    0xefe(%rip),%rdi
call   1030 <printf@plt>
jmp    11d4 <PrintCommStatus+0xc4>
lea    0xf1f(%rip),%rdi
call   1030 <printf@plt>
jmp    11d4 <PrintCommStatus+0xc4>
lea    0xf3b(%rip),%rdi
call   1030 <printf@plt>
jmp    11d4 <PrintCommStatus+0xc4>
lea    0xf5e(%rip),%rdi
call   1030 <printf@plt>
jmp    11d4 <PrintCommStatus+0xc4>
lea    0xf7b(%rip),%rdi
call   1030 <printf@plt>
jmp    11d4 <PrintCommStatus+0xc4>
lea    0xf96(%rip),%rdi
call   1030 <printf@plt>
jmp    11d4 <PrintCommStatus+0xc4>
lea    0xfaf(%rip),%rdi
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<PrintCommStatus>:
cmp    $0x7,%edi
ja     112b <PrintCommStatus+0x1b>
movslq %edi,%rax
lea    0x1055(%rip),%rcx
movslq (%rcx,%rax,4),%rdi
add    %rcx,%rdi
jmp    1030 <puts@plt>
lea    0x1024(%rip),%rdi
jmp    1030 <puts@plt>

LLVM IR (-O0):
@.str = [35 x i8] c"COMM_TXSUCCESS: Transmit success!\0A\00"
@.str.1 = [36 x i8] c"COMM_RXSUCCESS: receiving success!\0A\00"
@.str.2 = [50 x i8] c"COMM_TXFAIL: Failed transmit instruction packet!\0A\00"
@.str.3 = [45 x i8] c"COMM_TXERROR: Incorrect instruction packet!\0A\00"
@.str.4 = [52 x i8] c"COMM_RXFAIL: Failed get status packet from device!\0A\00"
@.str.5 = [46 x i8] c"COMM_RXWAITING: Now receiving status packet!\0A\00"
@.str.6 = [44 x i8] c"COMM_RXTIMEOUT: There is no status packet!\0A\00"
@.str.7 = [42 x i8] c"COMM_RXCORRUPT: Incorrect status packet!\0A\00"
@.str.8 = [29 x i8] c"This is unknown error code!\0A\00"
define void @PrintCommStatus(i32 %0) {
%2 = alloca i32
store i32 %0, i32* %2
%3 = load i32, i32* %2
switch i32 %3, label %20 [
i32 0, label %4
i32 1, label %6
i32 2, label %8
i32 4, label %10
i32 3, label %12
i32 5, label %14
i32 6, label %16
i32 7, label %18
]
4: ; preds = %1
%5 = call i32 @printf(i8* getelementptr inbounds ([35 x i8], [35 x i8]* @.str, i64 0, i64 0))
br label %22
6: ; preds = %1
%7 = call i32 @printf(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str.1, i64 0, i64 0))
br label %22
8: ; preds = %1
%9 = call i32 @printf(i8* getelementptr inbounds ([50 x i8], [50 x i8]* @.str.2, i64 0, i64 0))
br label %22
10: ; preds = %1
%11 = call i32 @printf(i8* getelementptr inbounds ([45 x i8], [45 x i8]* @.str.3, i64 0, i64 0))
br label %22
12: ; preds = %1
%13 = call i32 @printf(i8* getelementptr inbounds ([52 x i8], [52 x i8]* @.str.4, i64 0, i64 0))
br label %22
14: ; preds = %1
%15 = call i32 @printf(i8* getelementptr inbounds ([46 x i8], [46 x i8]* @.str.5, i64 0, i64 0))
br label %22
16: ; preds = %1
%17 = call i32 @printf(i8* getelementptr inbounds ([44 x i8], [44 x i8]* @.str.6, i64 0, i64 0))
br label %22
18: ; preds = %1
%19 = call i32 @printf(i8* getelementptr inbounds ([42 x i8], [42 x i8]* @.str.7, i64 0, i64 0))
br label %22
20: ; preds = %1
%21 = call i32 @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.8, i64 0, i64 0))
br label %22
22: ; preds = %20, %18, %16, %14, %12, %10, %8, %6, %4
ret void
}

LLVM IR (-O2):
@str = [41 x i8] c"COMM_RXCORRUPT: Incorrect status packet!\00"
@str.9 = [43 x i8] c"COMM_RXTIMEOUT: There is no status packet!\00"
@str.10 = [45 x i8] c"COMM_RXWAITING: Now receiving status packet!\00"
@str.11 = [51 x i8] c"COMM_RXFAIL: Failed get status packet from device!\00"
@str.12 = [44 x i8] c"COMM_TXERROR: Incorrect instruction packet!\00"
@str.13 = [49 x i8] c"COMM_TXFAIL: Failed transmit instruction packet!\00"
@str.14 = [35 x i8] c"COMM_RXSUCCESS: receiving success!\00"
@str.15 = [34 x i8] c"COMM_TXSUCCESS: Transmit success!\00"
@str.16 = [28 x i8] c"This is unknown error code!\00"
@reltable.PrintCommStatus = [8 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([34 x i8]* @str.15 to i64), i64 ptrtoint ([8 x i32]* @reltable.PrintCommStatus to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([35 x i8]* @str.14 to i64), i64 ptrtoint ([8 x i32]* @reltable.PrintCommStatus to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([49 x i8]* @str.13 to i64), i64 ptrtoint ([8 x i32]* @reltable.PrintCommStatus to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([51 x i8]* @str.11 to i64), i64 ptrtoint ([8 x i32]* @reltable.PrintCommStatus to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([44 x i8]* @str.12 to i64), i64 ptrtoint ([8 x i32]* @reltable.PrintCommStatus to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([45 x i8]* @str.10 to i64), i64 ptrtoint ([8 x i32]* @reltable.PrintCommStatus to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([43 x i8]* @str.9 to i64), i64 ptrtoint ([8 x i32]* @reltable.PrintCommStatus to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([41 x i8]* @str to i64), i64 ptrtoint ([8 x i32]* @reltable.PrintCommStatus to i64)) to i32)]
define void @PrintCommStatus(i32 %0) {
%2 = icmp ult i32 %0, 8
br i1 %2, label %3, label %7
3: ; preds = %1
%4 = sext i32 %0 to i64
%5 = shl i64 %4, 2
%6 = call i8* @llvm.load.relative.i64(i8* bitcast ([8 x i32]* @reltable.PrintCommStatus to i8*), i64 %5)
br label %7
7: ; preds = %1, %3
%8 = phi i8* [ %6, %3 ], [ getelementptr inbounds ([28 x i8], [28 x i8]* @str.16, i64 0, i64 0), %1 ]
%9 = tail call i32 @puts(i8* dereferenceable(1) %8)
ret void
}