#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 */
#define B115200 136
#define B1200 135
#define B19200 134
#define B2400 133
#define B300 132
#define B38400 131
#define B4800 130
#define B57600 129
#define B9600 128
char *baud_string(int speed) {
  char *str;
  switch (speed) {
  case B300:
    str = "300";
    break;
  case B1200:
    str = "1200";
    break;
  case B2400:
    str = "2400";
    break;
  case B4800:
    str = "4800";
    break;
  case B9600:
    str = "9600";
    break;
  case B19200:
    str = "19200";
    break;
  case B38400:
    str = "38400";
    break;
  case B57600:
    str = "57600";
    break;
  case B115200:
    str = "115200";
    break;
  default:
    str = "unknown speed";
  }
  return str;
}


x86 assembly (clang, -O0):
<baud_string>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0xffffff80,%eax
mov    %eax,%ecx
mov    %rcx,-0x18(%rbp)
sub    $0x8,%eax
ja     11c0 <baud_string+0xc0>
mov    -0x18(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xeed(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11cb <baud_string+0xcb>
lea    0xee1(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11cb <baud_string+0xcb>
lea    0xed6(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11cb <baud_string+0xcb>
lea    0xecb(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11cb <baud_string+0xcb>
lea    0xec0(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11cb <baud_string+0xcb>
lea    0xeb5(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11cb <baud_string+0xcb>
lea    0xeab(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11cb <baud_string+0xcb>
lea    0xea1(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11cb <baud_string+0xcb>
lea    0xe97(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    11cb <baud_string+0xcb>
lea    0xe8e(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<baud_string>:
add    $0xffffff80,%edi
cmp    $0x8,%edi
ja     111a <baud_string+0x1a>
movslq %edi,%rax
lea    0xf2e(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xf10(%rip),%rax
ret

LLVM IR (-O0):
@.str = [4 x i8] c"300\00"
@.str.1 = [5 x i8] c"1200\00"
@.str.2 = [5 x i8] c"2400\00"
@.str.3 = [5 x i8] c"4800\00"
@.str.4 = [5 x i8] c"9600\00"
@.str.5 = [6 x i8] c"19200\00"
@.str.6 = [6 x i8] c"38400\00"
@.str.7 = [6 x i8] c"57600\00"
@.str.8 = [7 x i8] c"115200\00"
@.str.9 = [14 x i8] c"unknown speed\00"
define i8* @baud_string(i32 %0) {
%2 = alloca i32
%3 = alloca i8*
store i32 %0, i32* %2
%4 = load i32, i32* %2
switch i32 %4, label %14 [
i32 132, label %5
i32 135, label %6
i32 133, label %7
i32 130, label %8
i32 128, label %9
i32 134, label %10
i32 131, label %11
i32 129, label %12
i32 136, label %13
]
5: ; preds = %1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i8** %3
br label %15
6: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i8** %3
br label %15
7: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0), i8** %3
br label %15
8: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.3, i64 0, i64 0), i8** %3
br label %15
9: ; preds = %1
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.4, i64 0, i64 0), i8** %3
br label %15
10: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.5, i64 0, i64 0), i8** %3
br label %15
11: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.6, i64 0, i64 0), i8** %3
br label %15
12: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.7, i64 0, i64 0), i8** %3
br label %15
13: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.8, i64 0, i64 0), i8** %3
br label %15
14: ; preds = %1
store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.9, i64 0, i64 0), i8** %3
br label %15
15: ; preds = %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%16 = load i8*, i8** %3
ret i8* %16
}

LLVM IR (-O2):
@.str = [4 x i8] c"300\00"
@.str.1 = [5 x i8] c"1200\00"
@.str.2 = [5 x i8] c"2400\00"
@.str.3 = [5 x i8] c"4800\00"
@.str.4 = [5 x i8] c"9600\00"
@.str.5 = [6 x i8] c"19200\00"
@.str.6 = [6 x i8] c"38400\00"
@.str.7 = [6 x i8] c"57600\00"
@.str.8 = [7 x i8] c"115200\00"
@.str.9 = [14 x i8] c"unknown speed\00"
@reltable.baud_string = [9 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.4 to i64), i64 ptrtoint ([9 x i32]* @reltable.baud_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.7 to i64), i64 ptrtoint ([9 x i32]* @reltable.baud_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.3 to i64), i64 ptrtoint ([9 x i32]* @reltable.baud_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.6 to i64), i64 ptrtoint ([9 x i32]* @reltable.baud_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([4 x i8]* @.str to i64), i64 ptrtoint ([9 x i32]* @reltable.baud_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.2 to i64), i64 ptrtoint ([9 x i32]* @reltable.baud_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.5 to i64), i64 ptrtoint ([9 x i32]* @reltable.baud_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([5 x i8]* @.str.1 to i64), i64 ptrtoint ([9 x i32]* @reltable.baud_string to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @.str.8 to i64), i64 ptrtoint ([9 x i32]* @reltable.baud_string to i64)) to i32)]
define i8* @baud_string(i32 %0) {
%2 = add i32 %0, -128
%3 = icmp ult i32 %2, 9
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = shl i64 %5, 2
%7 = call i8* @llvm.load.relative.i64(i8* bitcast ([9 x i32]* @reltable.baud_string to i8*), i64 %6)
br label %8
8: ; preds = %1, %4
%9 = phi i8* [ %7, %4 ], [ getelementptr inbounds ([14 x i8], [14 x i8]* @.str.9, i64 0, i64 0), %1 ]
ret i8* %9
}