#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 /*<<< orphan*/ month_names;

/* Variables and functions */
int /*<<< orphan*/ strcmp(char const *, char const *);
int get_month_index(const char *s) {
  static const char *month_names[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
                                      "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
  int i;
  for (i = 0; i < (int)(sizeof(month_names) / sizeof(month_names[0])); i++)
    if (!strcmp(s, month_names[i]))
      return i;
  return -1;
}


x86 assembly (clang, -O0):
<get_month_index>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x10(%rbp)
movl   $0x0,-0x14(%rbp)
cmpl   $0xc,-0x14(%rbp)
jge    116c <get_month_index+0x5c>
mov    -0x10(%rbp),%rdi
movslq -0x14(%rbp),%rcx
lea    0x2ef4(%rip),%rax
mov    (%rax,%rcx,8),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    1159 <get_month_index+0x49>
mov    -0x14(%rbp),%eax
mov    %eax,-0x4(%rbp)
jmp    1173 <get_month_index+0x63>
jmp    115e <get_month_index+0x4e>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1123 <get_month_index+0x13>
movl   $0xffffffff,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<get_month_index>:
push   %rbx
mov    %rdi,%rbx
lea    0xee5(%rip),%rsi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1216 <get_month_index+0x106>
lea    0xed5(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     121a <get_month_index+0x10a>
lea    0xec2(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1221 <get_month_index+0x111>
lea    0xeaf(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1228 <get_month_index+0x118>
lea    0xe9c(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     122f <get_month_index+0x11f>
lea    0xe89(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1236 <get_month_index+0x126>
lea    0xe76(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     123d <get_month_index+0x12d>
lea    0xe63(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1244 <get_month_index+0x134>
lea    0xe54(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     124b <get_month_index+0x13b>
lea    0xe45(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1252 <get_month_index+0x142>
lea    0xe36(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1259 <get_month_index+0x149>
lea    0xe27(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
neg    %eax
sbb    %eax,%eax
or     $0xb,%eax
pop    %rbx
ret
xor    %eax,%eax
pop    %rbx
ret
mov    $0x1,%eax
pop    %rbx
ret
mov    $0x2,%eax
pop    %rbx
ret
mov    $0x3,%eax
pop    %rbx
ret
mov    $0x4,%eax
pop    %rbx
ret
mov    $0x5,%eax
pop    %rbx
ret
mov    $0x6,%eax
pop    %rbx
ret
mov    $0x7,%eax
pop    %rbx
ret
mov    $0x8,%eax
pop    %rbx
ret
mov    $0x9,%eax
pop    %rbx
ret
mov    $0xa,%eax
pop    %rbx
ret

LLVM IR (-O0):
@get_month_index.month_names = internal global [12 x i8*] [i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.5, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.6, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.7, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.8, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.9, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i32 0, i32 0), i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.11, i32 0, i32 0)]
@.str = [4 x i8] c"Jan\00"
@.str.1 = [4 x i8] c"Feb\00"
@.str.2 = [4 x i8] c"Mar\00"
@.str.3 = [4 x i8] c"Apr\00"
@.str.4 = [4 x i8] c"May\00"
@.str.5 = [4 x i8] c"Jun\00"
@.str.6 = [4 x i8] c"Jul\00"
@.str.7 = [4 x i8] c"Aug\00"
@.str.8 = [4 x i8] c"Sep\00"
@.str.9 = [4 x i8] c"Oct\00"
@.str.10 = [4 x i8] c"Nov\00"
@.str.11 = [4 x i8] c"Dec\00"
define i32 @get_month_index(i8* %0) {
%2 = alloca i32
%3 = alloca i8*
%4 = alloca i32
store i8* %0, i8** %3
store i32 0, i32* %4
br label %5
5: ; preds = %19, %1
%6 = load i32, i32* %4
%7 = icmp slt i32 %6, 12
br i1 %7, label %8, label %22
8: ; preds = %5
%9 = load i8*, i8** %3
%10 = load i32, i32* %4
%11 = sext i32 %10 to i64
%12 = getelementptr inbounds [12 x i8*], [12 x i8*]* @get_month_index.month_names, i64 0, i64 %11
%13 = load i8*, i8** %12
%14 = call i32 @strcmp(i8* %9, i8* %13)
%15 = icmp ne i32 %14, 0
br i1 %15, label %18, label %16
16: ; preds = %8
%17 = load i32, i32* %4
store i32 %17, i32* %2
br label %23
18: ; preds = %8
br label %19
19: ; preds = %18
%20 = load i32, i32* %4
%21 = add nsw i32 %20, 1
store i32 %21, i32* %4
br label %5
22: ; preds = %5
store i32 -1, i32* %2
br label %23
23: ; preds = %22, %16
%24 = load i32, i32* %2
ret i32 %24
}

LLVM IR (-O2):
@.str = [4 x i8] c"Jan\00"
@.str.1 = [4 x i8] c"Feb\00"
@.str.2 = [4 x i8] c"Mar\00"
@.str.3 = [4 x i8] c"Apr\00"
@.str.4 = [4 x i8] c"May\00"
@.str.5 = [4 x i8] c"Jun\00"
@.str.6 = [4 x i8] c"Jul\00"
@.str.7 = [4 x i8] c"Aug\00"
@.str.8 = [4 x i8] c"Sep\00"
@.str.9 = [4 x i8] c"Oct\00"
@.str.10 = [4 x i8] c"Nov\00"
@.str.11 = [4 x i8] c"Dec\00"
define i32 @get_month_index(i8* nocapture %0) {
%2 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(4) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
%3 = icmp eq i32 %2, 0
br i1 %3, label %38, label %4
4: ; preds = %1
%5 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(4) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0))
%6 = icmp eq i32 %5, 0
br i1 %6, label %38, label %7
7: ; preds = %4
%8 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(4) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%9 = icmp eq i32 %8, 0
br i1 %9, label %38, label %10
10: ; preds = %7
%11 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(4) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0))
%12 = icmp eq i32 %11, 0
br i1 %12, label %38, label %13
13: ; preds = %10
%14 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(4) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0))
%15 = icmp eq i32 %14, 0
br i1 %15, label %38, label %16
16: ; preds = %13
%17 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(4) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.5, i64 0, i64 0))
%18 = icmp eq i32 %17, 0
br i1 %18, label %38, label %19
19: ; preds = %16
%20 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(4) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.6, i64 0, i64 0))
%21 = icmp eq i32 %20, 0
br i1 %21, label %38, label %22
22: ; preds = %19
%23 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(4) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.7, i64 0, i64 0))
%24 = icmp eq i32 %23, 0
br i1 %24, label %38, label %25
25: ; preds = %22
%26 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(4) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.8, i64 0, i64 0))
%27 = icmp eq i32 %26, 0
br i1 %27, label %38, label %28
28: ; preds = %25
%29 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(4) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.9, i64 0, i64 0))
%30 = icmp eq i32 %29, 0
br i1 %30, label %38, label %31
31: ; preds = %28
%32 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(4) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0))
%33 = icmp eq i32 %32, 0
br i1 %33, label %38, label %34
34: ; preds = %31
%35 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(4) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.11, i64 0, i64 0))
%36 = icmp eq i32 %35, 0
%37 = select i1 %36, i32 11, i32 -1
br label %38
38: ; preds = %34, %31, %28, %25, %22, %19, %16, %13, %10, %7, %4, %1
%39 = phi i32 [ 0, %1 ], [ 1, %4 ], [ 2, %7 ], [ 3, %10 ], [ 4, %13 ], [ 5, %16 ], [ 6, %19 ], [ 7, %22 ], [ 8, %25 ], [ 9, %28 ], [ 10, %31 ], [ %37, %34 ]
ret i32 %39
}