#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__ strcmp(char *, char *);
char *convertMonth(char *theMonth) {
  if (strcmp(theMonth, "Jan") == 0)
    return "01";
  else if (strcmp(theMonth, "Feb") == 0)
    return "02";
  else if (strcmp(theMonth, "Mar") == 0)
    return "03";
  else if (strcmp(theMonth, "Apr") == 0)
    return "04";
  else if (strcmp(theMonth, "May") == 0)
    return "05";
  else if (strcmp(theMonth, "Jun") == 0)
    return "06";
  else if (strcmp(theMonth, "Jul") == 0)
    return "07";
  else if (strcmp(theMonth, "Aug") == 0)
    return "08";
  else if (strcmp(theMonth, "Sep") == 0)
    return "09";
  else if (strcmp(theMonth, "Oct") == 0)
    return "10";
  else if (strcmp(theMonth, "Nov") == 0)
    return "11";
  else if (strcmp(theMonth, "Dec") == 0)
    return "12";
  else
    return NULL;
}


x86 assembly (clang, -O0):
<convertMonth>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xed9(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    1146 <convertMonth+0x36>
lea    0xec7(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    131c <convertMonth+0x20c>
mov    -0x10(%rbp),%rdi
lea    0xeb6(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    1170 <convertMonth+0x60>
lea    0xea4(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    131c <convertMonth+0x20c>
mov    -0x10(%rbp),%rdi
lea    0xe93(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    119a <convertMonth+0x8a>
lea    0xe81(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    131c <convertMonth+0x20c>
mov    -0x10(%rbp),%rdi
lea    0xe70(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    11c4 <convertMonth+0xb4>
lea    0xe5e(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    131c <convertMonth+0x20c>
mov    -0x10(%rbp),%rdi
lea    0xe4d(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    11ee <convertMonth+0xde>
lea    0xe3b(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    131c <convertMonth+0x20c>
mov    -0x10(%rbp),%rdi
lea    0xe2a(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    1218 <convertMonth+0x108>
lea    0xe18(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    131c <convertMonth+0x20c>
mov    -0x10(%rbp),%rdi
lea    0xe07(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    1242 <convertMonth+0x132>
lea    0xdf5(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    131c <convertMonth+0x20c>
mov    -0x10(%rbp),%rdi
lea    0xde4(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    126c <convertMonth+0x15c>
lea    0xdd2(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    131c <convertMonth+0x20c>
mov    -0x10(%rbp),%rdi
lea    0xdc1(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    1296 <convertMonth+0x186>
lea    0xdaf(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    131c <convertMonth+0x20c>
mov    -0x10(%rbp),%rdi
lea    0xd9e(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    12c0 <convertMonth+0x1b0>
lea    0xd8c(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    131c <convertMonth+0x20c>
mov    -0x10(%rbp),%rdi
lea    0xd7b(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    12ea <convertMonth+0x1da>
lea    0xd69(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    131c <convertMonth+0x20c>
mov    -0x10(%rbp),%rdi
lea    0xd58(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%rax
jne    1314 <convertMonth+0x204>
lea    0xd46(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    131c <convertMonth+0x20c>
movq   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<convertMonth>:
push   %rbx
mov    %rdi,%rbx
lea    0xee5(%rip),%rsi
call   1030 <strcmp@plt>
test   %rax,%rax
je     1239 <convertMonth+0x129>
lea    0xed7(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     1242 <convertMonth+0x132>
lea    0xec6(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     124b <convertMonth+0x13b>
lea    0xeb5(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     1254 <convertMonth+0x144>
lea    0xea4(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     125d <convertMonth+0x14d>
lea    0xe93(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     1266 <convertMonth+0x156>
lea    0xe82(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     126f <convertMonth+0x15f>
lea    0xe71(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     1278 <convertMonth+0x168>
lea    0xe60(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     1281 <convertMonth+0x171>
lea    0xe4f(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     128a <convertMonth+0x17a>
lea    0xe3e(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %rax,%rax
je     1293 <convertMonth+0x183>
lea    0xe31(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
mov    %rax,%rcx
xor    %eax,%eax
test   %rcx,%rcx
lea    0xe1e(%rip),%rcx
cmove  %rcx,%rax
pop    %rbx
ret
lea    0xdc4(%rip),%rax
pop    %rbx
ret
lea    0xdc2(%rip),%rax
pop    %rbx
ret
lea    0xdc0(%rip),%rax
pop    %rbx
ret
lea    0xdbe(%rip),%rax
pop    %rbx
ret
lea    0xdbc(%rip),%rax
pop    %rbx
ret
lea    0xdba(%rip),%rax
pop    %rbx
ret
lea    0xdb8(%rip),%rax
pop    %rbx
ret
lea    0xdb6(%rip),%rax
pop    %rbx
ret
lea    0xdb4(%rip),%rax
pop    %rbx
ret
lea    0xdb2(%rip),%rax
pop    %rbx
ret
lea    0xdb0(%rip),%rax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [4 x i8] c"Jan\00"
@.str.1 = [3 x i8] c"01\00"
@.str.2 = [4 x i8] c"Feb\00"
@.str.3 = [3 x i8] c"02\00"
@.str.4 = [4 x i8] c"Mar\00"
@.str.5 = [3 x i8] c"03\00"
@.str.6 = [4 x i8] c"Apr\00"
@.str.7 = [3 x i8] c"04\00"
@.str.8 = [4 x i8] c"May\00"
@.str.9 = [3 x i8] c"05\00"
@.str.10 = [4 x i8] c"Jun\00"
@.str.11 = [3 x i8] c"06\00"
@.str.12 = [4 x i8] c"Jul\00"
@.str.13 = [3 x i8] c"07\00"
@.str.14 = [4 x i8] c"Aug\00"
@.str.15 = [3 x i8] c"08\00"
@.str.16 = [4 x i8] c"Sep\00"
@.str.17 = [3 x i8] c"09\00"
@.str.18 = [4 x i8] c"Oct\00"
@.str.19 = [3 x i8] c"10\00"
@.str.20 = [4 x i8] c"Nov\00"
@.str.21 = [3 x i8] c"11\00"
@.str.22 = [4 x i8] c"Dec\00"
@.str.23 = [3 x i8] c"12\00"
define i8* @convertMonth(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
store i8* %0, i8** %3
%4 = load i8*, i8** %3
%5 = call i64 @strcmp(i8* %4, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
%6 = icmp eq i64 %5, 0
br i1 %6, label %7, label %8
7: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8** %2
br label %64
8: ; preds = %1
%9 = load i8*, i8** %3
%10 = call i64 @strcmp(i8* %9, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%11 = icmp eq i64 %10, 0
br i1 %11, label %12, label %13
12: ; preds = %8
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8** %2
br label %64
13: ; preds = %8
%14 = load i8*, i8** %3
%15 = call i64 @strcmp(i8* %14, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0))
%16 = icmp eq i64 %15, 0
br i1 %16, label %17, label %18
17: ; preds = %13
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.5, i64 0, i64 0), i8** %2
br label %64
18: ; preds = %13
%19 = load i8*, i8** %3
%20 = call i64 @strcmp(i8* %19, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.6, i64 0, i64 0))
%21 = icmp eq i64 %20, 0
br i1 %21, label %22, label %23
22: ; preds = %18
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.7, i64 0, i64 0), i8** %2
br label %64
23: ; preds = %18
%24 = load i8*, i8** %3
%25 = call i64 @strcmp(i8* %24, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.8, i64 0, i64 0))
%26 = icmp eq i64 %25, 0
br i1 %26, label %27, label %28
27: ; preds = %23
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.9, i64 0, i64 0), i8** %2
br label %64
28: ; preds = %23
%29 = load i8*, i8** %3
%30 = call i64 @strcmp(i8* %29, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0))
%31 = icmp eq i64 %30, 0
br i1 %31, label %32, label %33
32: ; preds = %28
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.11, i64 0, i64 0), i8** %2
br label %64
33: ; preds = %28
%34 = load i8*, i8** %3
%35 = call i64 @strcmp(i8* %34, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.12, i64 0, i64 0))
%36 = icmp eq i64 %35, 0
br i1 %36, label %37, label %38
37: ; preds = %33
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.13, i64 0, i64 0), i8** %2
br label %64
38: ; preds = %33
%39 = load i8*, i8** %3
%40 = call i64 @strcmp(i8* %39, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.14, i64 0, i64 0))
%41 = icmp eq i64 %40, 0
br i1 %41, label %42, label %43
42: ; preds = %38
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.15, i64 0, i64 0), i8** %2
br label %64
43: ; preds = %38
%44 = load i8*, i8** %3
%45 = call i64 @strcmp(i8* %44, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.16, i64 0, i64 0))
%46 = icmp eq i64 %45, 0
br i1 %46, label %47, label %48
47: ; preds = %43
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.17, i64 0, i64 0), i8** %2
br label %64
48: ; preds = %43
%49 = load i8*, i8** %3
%50 = call i64 @strcmp(i8* %49, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.18, i64 0, i64 0))
%51 = icmp eq i64 %50, 0
br i1 %51, label %52, label %53
52: ; preds = %48
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.19, i64 0, i64 0), i8** %2
br label %64
53: ; preds = %48
%54 = load i8*, i8** %3
%55 = call i64 @strcmp(i8* %54, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.20, i64 0, i64 0))
%56 = icmp eq i64 %55, 0
br i1 %56, label %57, label %58
57: ; preds = %53
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.21, i64 0, i64 0), i8** %2
br label %64
58: ; preds = %53
%59 = load i8*, i8** %3
%60 = call i64 @strcmp(i8* %59, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.22, i64 0, i64 0))
%61 = icmp eq i64 %60, 0
br i1 %61, label %62, label %63
62: ; preds = %58
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.23, i64 0, i64 0), i8** %2
br label %64
63: ; preds = %58
store i8* null, i8** %2
br label %64
64: ; preds = %63, %62, %57, %52, %47, %42, %37, %32, %27, %22, %17, %12, %7
%65 = load i8*, i8** %2
ret i8* %65
}

LLVM IR (-O2):
@.str = [4 x i8] c"Jan\00"
@.str.1 = [3 x i8] c"01\00"
@.str.2 = [4 x i8] c"Feb\00"
@.str.3 = [3 x i8] c"02\00"
@.str.4 = [4 x i8] c"Mar\00"
@.str.5 = [3 x i8] c"03\00"
@.str.6 = [4 x i8] c"Apr\00"
@.str.7 = [3 x i8] c"04\00"
@.str.8 = [4 x i8] c"May\00"
@.str.9 = [3 x i8] c"05\00"
@.str.10 = [4 x i8] c"Jun\00"
@.str.11 = [3 x i8] c"06\00"
@.str.12 = [4 x i8] c"Jul\00"
@.str.13 = [3 x i8] c"07\00"
@.str.14 = [4 x i8] c"Aug\00"
@.str.15 = [3 x i8] c"08\00"
@.str.16 = [4 x i8] c"Sep\00"
@.str.17 = [3 x i8] c"09\00"
@.str.18 = [4 x i8] c"Oct\00"
@.str.19 = [3 x i8] c"10\00"
@.str.20 = [4 x i8] c"Nov\00"
@.str.21 = [3 x i8] c"11\00"
@.str.22 = [4 x i8] c"Dec\00"
@.str.23 = [3 x i8] c"12\00"
define i8* @convertMonth(i8* %0) {
%2 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
%3 = icmp eq i64 %2, 0
br i1 %3, label %38, label %4
4: ; preds = %1
%5 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%6 = icmp eq i64 %5, 0
br i1 %6, label %38, label %7
7: ; preds = %4
%8 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0))
%9 = icmp eq i64 %8, 0
br i1 %9, label %38, label %10
10: ; preds = %7
%11 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.6, i64 0, i64 0))
%12 = icmp eq i64 %11, 0
br i1 %12, label %38, label %13
13: ; preds = %10
%14 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.8, i64 0, i64 0))
%15 = icmp eq i64 %14, 0
br i1 %15, label %38, label %16
16: ; preds = %13
%17 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0))
%18 = icmp eq i64 %17, 0
br i1 %18, label %38, label %19
19: ; preds = %16
%20 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.12, i64 0, i64 0))
%21 = icmp eq i64 %20, 0
br i1 %21, label %38, label %22
22: ; preds = %19
%23 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.14, i64 0, i64 0))
%24 = icmp eq i64 %23, 0
br i1 %24, label %38, label %25
25: ; preds = %22
%26 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.16, i64 0, i64 0))
%27 = icmp eq i64 %26, 0
br i1 %27, label %38, label %28
28: ; preds = %25
%29 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.18, i64 0, i64 0))
%30 = icmp eq i64 %29, 0
br i1 %30, label %38, label %31
31: ; preds = %28
%32 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.20, i64 0, i64 0))
%33 = icmp eq i64 %32, 0
br i1 %33, label %38, label %34
34: ; preds = %31
%35 = tail call i64 @strcmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.22, i64 0, i64 0))
%36 = icmp eq i64 %35, 0
%37 = select i1 %36, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.23, i64 0, i64 0), i8* null
br label %38
38: ; preds = %34, %31, %28, %25, %22, %19, %16, %13, %10, %7, %4, %1
%39 = phi i8* [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), %1 ], [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), %4 ], [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str.5, i64 0, i64 0), %7 ], [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str.7, i64 0, i64 0), %10 ], [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str.9, i64 0, i64 0), %13 ], [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str.11, i64 0, i64 0), %16 ], [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str.13, i64 0, i64 0), %19 ], [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str.15, i64 0, i64 0), %22 ], [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str.17, i64 0, i64 0), %25 ], [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str.19, i64 0, i64 0), %28 ], [ getelementptr inbounds ([3 x i8], [3 x i8]* @.str.21, i64 0, i64 0), %31 ], [ %37, %34 ]
ret i8* %39
}