#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 uint8_t;

/* Variables and functions */
const char *time_units_to_text(uint8_t unit) {
  switch (unit) {
  case (0x00):
    return "10_MICROSECONDS";
  case (0x01):
    return "100_MICROSECONDS";
  case (0x02):
    return "1_MILLISECOND";
  case (0x03):
    return "10_MILLISECONDS";
  }
  return "UNKNOWN";
}


x86 assembly (clang, -O0):
<time_units_to_text>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0xc(%rbp)
mov    -0xc(%rbp),%eax
mov    %rax,-0x18(%rbp)
sub    $0x3,%rax
ja     116c <time_units_to_text+0x6c>
mov    -0x18(%rbp),%rax
lea    0xedd(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xedd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1177 <time_units_to_text+0x77>
lea    0xedd(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1177 <time_units_to_text+0x77>
lea    0xede(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1177 <time_units_to_text+0x77>
lea    0xedc(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1177 <time_units_to_text+0x77>
lea    0xedc(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<time_units_to_text>:
cmp    $0x3,%edi
ja     1117 <time_units_to_text+0x17>
movslq %edi,%rax
lea    0xf39(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xf21(%rip),%rax
ret

LLVM IR (-O0):
@.str = [16 x i8] c"10_MICROSECONDS\00"
@.str.1 = [17 x i8] c"100_MICROSECONDS\00"
@.str.2 = [14 x i8] c"1_MILLISECOND\00"
@.str.3 = [16 x i8] c"10_MILLISECONDS\00"
@.str.4 = [8 x i8] c"UNKNOWN\00"
define i8* @time_units_to_text(i32 %0) {
%2 = alloca i8*
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %9 [
i32 0, label %5
i32 1, label %6
i32 2, label %7
i32 3, label %8
]
5: ; preds = %1
store i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i8** %2
br label %10
6: ; preds = %1
store i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %10
7: ; preds = %1
store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i8** %2
br label %10
8: ; preds = %1
store i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %10
9: ; preds = %1
store i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.4, i64 0, i64 0), i8** %2
br label %10
10: ; preds = %9, %8, %7, %6, %5
%11 = load i8*, i8** %2
ret i8* %11
}

LLVM IR (-O2):
@.str = [16 x i8] c"10_MICROSECONDS\00"
@.str.1 = [17 x i8] c"100_MICROSECONDS\00"
@.str.2 = [14 x i8] c"1_MILLISECOND\00"
@.str.3 = [16 x i8] c"10_MILLISECONDS\00"
@.str.4 = [8 x i8] c"UNKNOWN\00"
@reltable.time_units_to_text = [4 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([16 x i8]* @.str to i64), i64 ptrtoint ([4 x i32]* @reltable.time_units_to_text to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([17 x i8]* @.str.1 to i64), i64 ptrtoint ([4 x i32]* @reltable.time_units_to_text to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([14 x i8]* @.str.2 to i64), i64 ptrtoint ([4 x i32]* @reltable.time_units_to_text to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([16 x i8]* @.str.3 to i64), i64 ptrtoint ([4 x i32]* @reltable.time_units_to_text to i64)) to i32)]
define i8* @time_units_to_text(i32 %0) {
%2 = icmp ult i32 %0, 4
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 ([4 x i32]* @reltable.time_units_to_text to i8*), i64 %5)
br label %7
7: ; preds = %1, %3
%8 = phi i8* [ %6, %3 ], [ getelementptr inbounds ([8 x i8], [8 x i8]* @.str.4, i64 0, i64 0), %1 ]
ret i8* %8
}