#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 */
scalar_t__ strncasecmp(char *, char *, int);
int find_month(char *m) {
  if (strncasecmp(m, "Jan", 3) == 0)
    return 0;
  else if (strncasecmp(m, "Feb", 3) == 0)
    return 1;
  else if (strncasecmp(m, "Mar", 3) == 0)
    return 2;
  else if (strncasecmp(m, "Apr", 3) == 0)
    return 3;
  else if (strncasecmp(m, "May", 3) == 0)
    return 4;
  else if (strncasecmp(m, "Jun", 3) == 0)
    return 5;
  else if (strncasecmp(m, "Jul", 3) == 0)
    return 6;
  else if (strncasecmp(m, "Aug", 3) == 0)
    return 7;
  else if (strncasecmp(m, "Sep", 3) == 0)
    return 8;
  else if (strncasecmp(m, "Oct", 3) == 0)
    return 9;
  else if (strncasecmp(m, "Nov", 3) == 0)
    return 10;
  else if (strncasecmp(m, "Dec", 3) == 0)
    return 11;
  return -1;
}


x86 assembly (clang, -O0):
<find_month>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xed9(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
cmp    $0x0,%rax
jne    1147 <find_month+0x37>
movl   $0x0,-0x4(%rbp)
jmp    135e <find_month+0x24e>
mov    -0x10(%rbp),%rdi
lea    0xeb2(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
cmp    $0x0,%rax
jne    1172 <find_month+0x62>
movl   $0x1,-0x4(%rbp)
jmp    135e <find_month+0x24e>
mov    -0x10(%rbp),%rdi
lea    0xe8b(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
cmp    $0x0,%rax
jne    119d <find_month+0x8d>
movl   $0x2,-0x4(%rbp)
jmp    135e <find_month+0x24e>
mov    -0x10(%rbp),%rdi
lea    0xe64(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
cmp    $0x0,%rax
jne    11c8 <find_month+0xb8>
movl   $0x3,-0x4(%rbp)
jmp    135e <find_month+0x24e>
mov    -0x10(%rbp),%rdi
lea    0xe3d(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
cmp    $0x0,%rax
jne    11f3 <find_month+0xe3>
movl   $0x4,-0x4(%rbp)
jmp    135e <find_month+0x24e>
mov    -0x10(%rbp),%rdi
lea    0xe16(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
cmp    $0x0,%rax
jne    121e <find_month+0x10e>
movl   $0x5,-0x4(%rbp)
jmp    135e <find_month+0x24e>
mov    -0x10(%rbp),%rdi
lea    0xdef(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
cmp    $0x0,%rax
jne    1249 <find_month+0x139>
movl   $0x6,-0x4(%rbp)
jmp    135e <find_month+0x24e>
mov    -0x10(%rbp),%rdi
lea    0xdc8(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
cmp    $0x0,%rax
jne    1274 <find_month+0x164>
movl   $0x7,-0x4(%rbp)
jmp    135e <find_month+0x24e>
mov    -0x10(%rbp),%rdi
lea    0xda1(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
cmp    $0x0,%rax
jne    129f <find_month+0x18f>
movl   $0x8,-0x4(%rbp)
jmp    135e <find_month+0x24e>
mov    -0x10(%rbp),%rdi
lea    0xd7a(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
cmp    $0x0,%rax
jne    12ca <find_month+0x1ba>
movl   $0x9,-0x4(%rbp)
jmp    135e <find_month+0x24e>
mov    -0x10(%rbp),%rdi
lea    0xd53(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
cmp    $0x0,%rax
jne    12f5 <find_month+0x1e5>
movl   $0xa,-0x4(%rbp)
jmp    135e <find_month+0x24e>
mov    -0x10(%rbp),%rdi
lea    0xd2c(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
cmp    $0x0,%rax
jne    1320 <find_month+0x210>
movl   $0xb,-0x4(%rbp)
jmp    135e <find_month+0x24e>
jmp    1325 <find_month+0x215>
jmp    132a <find_month+0x21a>
jmp    132f <find_month+0x21f>
jmp    1334 <find_month+0x224>
jmp    1339 <find_month+0x229>
jmp    133e <find_month+0x22e>
jmp    1343 <find_month+0x233>
jmp    1348 <find_month+0x238>
jmp    134d <find_month+0x23d>
jmp    1352 <find_month+0x242>
jmp    1357 <find_month+0x247>
movl   $0xffffffff,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<find_month>:
push   %rbp
push   %rbx
push   %rax
mov    %rdi,%rbx
lea    0xee3(%rip),%rsi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
test   %rax,%rax
je     1269 <find_month+0x159>
lea    0xecd(%rip),%rsi
mov    %rbx,%rdi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
test   %rax,%rax
je     126d <find_month+0x15d>
lea    0xeb4(%rip),%rsi
mov    $0x3,%ebp
mov    %rbx,%rdi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
test   %rax,%rax
je     1274 <find_month+0x164>
lea    0xe96(%rip),%rsi
mov    %rbx,%rdi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
test   %rax,%rax
je     12aa <find_month+0x19a>
lea    0xe7d(%rip),%rsi
mov    %rbx,%rdi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
test   %rax,%rax
je     127b <find_month+0x16b>
lea    0xe64(%rip),%rsi
mov    %rbx,%rdi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
test   %rax,%rax
je     1282 <find_month+0x172>
lea    0xe4b(%rip),%rsi
mov    %rbx,%rdi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
test   %rax,%rax
je     1289 <find_month+0x179>
lea    0xe32(%rip),%rsi
mov    %rbx,%rdi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
test   %rax,%rax
je     1290 <find_month+0x180>
lea    0xe19(%rip),%rsi
mov    %rbx,%rdi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
test   %rax,%rax
je     1297 <find_month+0x187>
lea    0xe04(%rip),%rsi
mov    %rbx,%rdi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
test   %rax,%rax
je     129e <find_month+0x18e>
lea    0xdef(%rip),%rsi
mov    %rbx,%rdi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
test   %rax,%rax
je     12a5 <find_month+0x195>
lea    0xdda(%rip),%rsi
mov    %rbx,%rdi
mov    $0x3,%edx
call   1030 <strncasecmp@plt>
neg    %rax
sbb    %ebp,%ebp
or     $0xb,%ebp
jmp    12aa <find_month+0x19a>
xor    %ebp,%ebp
jmp    12aa <find_month+0x19a>
mov    $0x1,%ebp
jmp    12aa <find_month+0x19a>
mov    $0x2,%ebp
jmp    12aa <find_month+0x19a>
mov    $0x4,%ebp
jmp    12aa <find_month+0x19a>
mov    $0x5,%ebp
jmp    12aa <find_month+0x19a>
mov    $0x6,%ebp
jmp    12aa <find_month+0x19a>
mov    $0x7,%ebp
jmp    12aa <find_month+0x19a>
mov    $0x8,%ebp
jmp    12aa <find_month+0x19a>
mov    $0x9,%ebp
jmp    12aa <find_month+0x19a>
mov    $0xa,%ebp
mov    %ebp,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.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 @find_month(i8* %0) {
%2 = alloca i32
%3 = alloca i8*
store i8* %0, i8** %3
%4 = load i8*, i8** %3
%5 = call i64 @strncasecmp(i8* %4, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 3)
%6 = icmp eq i64 %5, 0
br i1 %6, label %7, label %8
7: ; preds = %1
store i32 0, i32* %2
br label %75
8: ; preds = %1
%9 = load i8*, i8** %3
%10 = call i64 @strncasecmp(i8* %9, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 3)
%11 = icmp eq i64 %10, 0
br i1 %11, label %12, label %13
12: ; preds = %8
store i32 1, i32* %2
br label %75
13: ; preds = %8
%14 = load i8*, i8** %3
%15 = call i64 @strncasecmp(i8* %14, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 3)
%16 = icmp eq i64 %15, 0
br i1 %16, label %17, label %18
17: ; preds = %13
store i32 2, i32* %2
br label %75
18: ; preds = %13
%19 = load i8*, i8** %3
%20 = call i64 @strncasecmp(i8* %19, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 3)
%21 = icmp eq i64 %20, 0
br i1 %21, label %22, label %23
22: ; preds = %18
store i32 3, i32* %2
br label %75
23: ; preds = %18
%24 = load i8*, i8** %3
%25 = call i64 @strncasecmp(i8* %24, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i32 3)
%26 = icmp eq i64 %25, 0
br i1 %26, label %27, label %28
27: ; preds = %23
store i32 4, i32* %2
br label %75
28: ; preds = %23
%29 = load i8*, i8** %3
%30 = call i64 @strncasecmp(i8* %29, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.5, i64 0, i64 0), i32 3)
%31 = icmp eq i64 %30, 0
br i1 %31, label %32, label %33
32: ; preds = %28
store i32 5, i32* %2
br label %75
33: ; preds = %28
%34 = load i8*, i8** %3
%35 = call i64 @strncasecmp(i8* %34, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.6, i64 0, i64 0), i32 3)
%36 = icmp eq i64 %35, 0
br i1 %36, label %37, label %38
37: ; preds = %33
store i32 6, i32* %2
br label %75
38: ; preds = %33
%39 = load i8*, i8** %3
%40 = call i64 @strncasecmp(i8* %39, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.7, i64 0, i64 0), i32 3)
%41 = icmp eq i64 %40, 0
br i1 %41, label %42, label %43
42: ; preds = %38
store i32 7, i32* %2
br label %75
43: ; preds = %38
%44 = load i8*, i8** %3
%45 = call i64 @strncasecmp(i8* %44, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.8, i64 0, i64 0), i32 3)
%46 = icmp eq i64 %45, 0
br i1 %46, label %47, label %48
47: ; preds = %43
store i32 8, i32* %2
br label %75
48: ; preds = %43
%49 = load i8*, i8** %3
%50 = call i64 @strncasecmp(i8* %49, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.9, i64 0, i64 0), i32 3)
%51 = icmp eq i64 %50, 0
br i1 %51, label %52, label %53
52: ; preds = %48
store i32 9, i32* %2
br label %75
53: ; preds = %48
%54 = load i8*, i8** %3
%55 = call i64 @strncasecmp(i8* %54, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 3)
%56 = icmp eq i64 %55, 0
br i1 %56, label %57, label %58
57: ; preds = %53
store i32 10, i32* %2
br label %75
58: ; preds = %53
%59 = load i8*, i8** %3
%60 = call i64 @strncasecmp(i8* %59, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.11, i64 0, i64 0), i32 3)
%61 = icmp eq i64 %60, 0
br i1 %61, label %62, label %63
62: ; preds = %58
store i32 11, i32* %2
br label %75
63: ; preds = %58
br label %64
64: ; preds = %63
br label %65
65: ; preds = %64
br label %66
66: ; preds = %65
br label %67
67: ; preds = %66
br label %68
68: ; preds = %67
br label %69
69: ; preds = %68
br label %70
70: ; preds = %69
br label %71
71: ; preds = %70
br label %72
72: ; preds = %71
br label %73
73: ; preds = %72
br label %74
74: ; preds = %73
store i32 -1, i32* %2
br label %75
75: ; preds = %74, %62, %57, %52, %47, %42, %37, %32, %27, %22, %17, %12, %7
%76 = load i32, i32* %2
ret i32 %76
}

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 @find_month(i8* nocapture %0) {
%2 = tail call i64 @strncasecmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 3)
%3 = icmp eq i64 %2, 0
br i1 %3, label %38, label %4
4: ; preds = %1
%5 = tail call i64 @strncasecmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 3)
%6 = icmp eq i64 %5, 0
br i1 %6, label %38, label %7
7: ; preds = %4
%8 = tail call i64 @strncasecmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 3)
%9 = icmp eq i64 %8, 0
br i1 %9, label %38, label %10
10: ; preds = %7
%11 = tail call i64 @strncasecmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i32 3)
%12 = icmp eq i64 %11, 0
br i1 %12, label %38, label %13
13: ; preds = %10
%14 = tail call i64 @strncasecmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i32 3)
%15 = icmp eq i64 %14, 0
br i1 %15, label %38, label %16
16: ; preds = %13
%17 = tail call i64 @strncasecmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.5, i64 0, i64 0), i32 3)
%18 = icmp eq i64 %17, 0
br i1 %18, label %38, label %19
19: ; preds = %16
%20 = tail call i64 @strncasecmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.6, i64 0, i64 0), i32 3)
%21 = icmp eq i64 %20, 0
br i1 %21, label %38, label %22
22: ; preds = %19
%23 = tail call i64 @strncasecmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.7, i64 0, i64 0), i32 3)
%24 = icmp eq i64 %23, 0
br i1 %24, label %38, label %25
25: ; preds = %22
%26 = tail call i64 @strncasecmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.8, i64 0, i64 0), i32 3)
%27 = icmp eq i64 %26, 0
br i1 %27, label %38, label %28
28: ; preds = %25
%29 = tail call i64 @strncasecmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.9, i64 0, i64 0), i32 3)
%30 = icmp eq i64 %29, 0
br i1 %30, label %38, label %31
31: ; preds = %28
%32 = tail call i64 @strncasecmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 3)
%33 = icmp eq i64 %32, 0
br i1 %33, label %38, label %34
34: ; preds = %31
%35 = tail call i64 @strncasecmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.11, i64 0, i64 0), i32 3)
%36 = icmp eq i64 %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
}