#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 */
const char *sit_detector_get_cause(int sit) {
  switch (sit) {
  case 0:
    return "No SIT detected";
  case 1:
    return "No circuit found";
  case 2:
    return "Operator intercept";
  case 3:
    return "Vacant circuit";
  case 4:
    return "Reorder (system busy)";
  case 5:
    return "Busy signal";
  default:
    return NULL;
  }
}


x86 assembly (clang, -O0):
<sit_detector_get_cause>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    %rax,-0x18(%rbp)
sub    $0x5,%rax
ja     118c <sit_detector_get_cause+0x8c>
mov    -0x18(%rbp),%rax
lea    0xedd(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xee5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1194 <sit_detector_get_cause+0x94>
lea    0xee5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1194 <sit_detector_get_cause+0x94>
lea    0xee6(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1194 <sit_detector_get_cause+0x94>
lea    0xee9(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1194 <sit_detector_get_cause+0x94>
lea    0xee8(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1194 <sit_detector_get_cause+0x94>
lea    0xeee(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1194 <sit_detector_get_cause+0x94>
movq   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<sit_detector_get_cause>:
cmp    $0x5,%edi
ja     1117 <sit_detector_get_cause+0x17>
movslq %edi,%rax
lea    0xf59(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
xor    %eax,%eax
ret

LLVM IR (-O0):
@.str = [16 x i8] c"No SIT detected\00"
@.str.1 = [17 x i8] c"No circuit found\00"
@.str.2 = [19 x i8] c"Operator intercept\00"
@.str.3 = [15 x i8] c"Vacant circuit\00"
@.str.4 = [22 x i8] c"Reorder (system busy)\00"
@.str.5 = [12 x i8] c"Busy signal\00"
define i8* @sit_detector_get_cause(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %11 [
i32 0, label %5
i32 1, label %6
i32 2, label %7
i32 3, label %8
i32 4, label %9
i32 5, label %10
]
5: ; preds = %1
store i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i8** %2
br label %12
6: ; preds = %1
store i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %12
7: ; preds = %1
store i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %12
8: ; preds = %1
store i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %12
9: ; preds = %1
store i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %12
10: ; preds = %1
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %12
11: ; preds = %1
store i8* null, 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 = [16 x i8] c"No SIT detected\00"
@.str.1 = [17 x i8] c"No circuit found\00"
@.str.2 = [19 x i8] c"Operator intercept\00"
@.str.3 = [15 x i8] c"Vacant circuit\00"
@.str.4 = [22 x i8] c"Reorder (system busy)\00"
@.str.5 = [12 x i8] c"Busy signal\00"
@reltable.sit_detector_get_cause = [6 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([16 x i8]* @.str to i64), i64 ptrtoint ([6 x i32]* @reltable.sit_detector_get_cause to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.1 to i64), i64 ptrtoint ([6 x i32]* @reltable.sit_detector_get_cause to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([19 x i8]* @.str.2 to i64), i64 ptrtoint ([6 x i32]* @reltable.sit_detector_get_cause to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([15 x i8]* @.str.3 to i64), i64 ptrtoint ([6 x i32]* @reltable.sit_detector_get_cause to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([22 x i8]* @.str.4 to i64), i64 ptrtoint ([6 x i32]* @reltable.sit_detector_get_cause to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([12 x i8]* @.str.5 to i64), i64 ptrtoint ([6 x i32]* @reltable.sit_detector_get_cause to i64)) to i32)]
define i8* @sit_detector_get_cause(i32 %0) {
%2 = icmp ult i32 %0, 6
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 ([6 x i32]* @reltable.sit_detector_get_cause to i8*), i64 %5)
br label %7
7: ; preds = %1, %3
%8 = phi i8* [ %6, %3 ], [ null, %1 ]
ret i8* %8
}