#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__ strcasecmp(char const *, char *);
const char *lookup(const char *extension) {
  return strcasecmp(extension, "css") == 0    ? "text/css"
         : strcasecmp(extension, "html") == 0 ? "text/html"
         : strcasecmp(extension, "gif") == 0  ? "image/gif"
         : strcasecmp(extension, "ico") == 0  ? "image/x-icon"
         : strcasecmp(extension, "jpg") == 0  ? "image/jpeg"
         : strcasecmp(extension, "js") == 0   ? "text/javascript"
         : strcasecmp(extension, "png") == 0  ? "image/png"
                                              : NULL;
}


x86 assembly (clang, -O0):
<lookup>:
push   %rbp
mov    %rsp,%rbp
sub    $0x40,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xede(%rip),%rsi
call   1030 <strcasecmp@plt>
cmp    $0x0,%rax
jne    1146 <lookup+0x36>
lea    0xec3(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1268 <lookup+0x158>
mov    -0x8(%rbp),%rdi
lea    0xebd(%rip),%rsi
call   1030 <strcasecmp@plt>
cmp    $0x0,%rax
jne    1170 <lookup+0x60>
lea    0xea2(%rip),%rax
mov    %rax,-0x18(%rbp)
jmp    1260 <lookup+0x150>
mov    -0x8(%rbp),%rdi
lea    0xe9e(%rip),%rsi
call   1030 <strcasecmp@plt>
cmp    $0x0,%rax
jne    119a <lookup+0x8a>
lea    0xe82(%rip),%rax
mov    %rax,-0x20(%rbp)
jmp    1258 <lookup+0x148>
mov    -0x8(%rbp),%rdi
lea    0xe78(%rip),%rsi
call   1030 <strcasecmp@plt>
cmp    $0x0,%rax
jne    11c4 <lookup+0xb4>
lea    0xe66(%rip),%rax
mov    %rax,-0x28(%rbp)
jmp    1250 <lookup+0x140>
mov    -0x8(%rbp),%rdi
lea    0xe5f(%rip),%rsi
call   1030 <strcasecmp@plt>
cmp    $0x0,%rax
jne    11ee <lookup+0xde>
lea    0xe4d(%rip),%rax
mov    %rax,-0x30(%rbp)
jmp    1248 <lookup+0x138>
mov    -0x8(%rbp),%rdi
lea    0xe44(%rip),%rsi
call   1030 <strcasecmp@plt>
cmp    $0x0,%rax
jne    1218 <lookup+0x108>
lea    0xe31(%rip),%rax
mov    %rax,-0x38(%rbp)
jmp    1240 <lookup+0x130>
mov    -0x8(%rbp),%rdi
lea    0xe33(%rip),%rsi
call   1030 <strcasecmp@plt>
mov    %rax,%rdx
xor    %eax,%eax
lea    0xe1c(%rip),%rcx
cmp    $0x0,%rdx
cmove  %rcx,%rax
mov    %rax,-0x38(%rbp)
mov    -0x38(%rbp),%rax
mov    %rax,-0x30(%rbp)
mov    -0x30(%rbp),%rax
mov    %rax,-0x28(%rbp)
mov    -0x28(%rbp),%rax
mov    %rax,-0x20(%rbp)
mov    -0x20(%rbp),%rax
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rax
add    $0x40,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<lookup>:
push   %rbx
mov    %rdi,%rbx
lea    0xeea(%rip),%rsi
call   1030 <strcasecmp@plt>
test   %rax,%rax
je     11b1 <lookup+0xa1>
lea    0xede(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcasecmp@plt>
test   %rax,%rax
je     11ba <lookup+0xaa>
lea    0xed5(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcasecmp@plt>
test   %rax,%rax
je     11c3 <lookup+0xb3>
lea    0xec5(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcasecmp@plt>
test   %rax,%rax
je     11cc <lookup+0xbc>
lea    0xec2(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcasecmp@plt>
test   %rax,%rax
je     11d5 <lookup+0xc5>
lea    0xebd(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcasecmp@plt>
test   %rax,%rax
je     11de <lookup+0xce>
lea    0xec2(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcasecmp@plt>
mov    %rax,%rcx
xor    %eax,%eax
test   %rcx,%rcx
lea    0xea5(%rip),%rcx
cmove  %rcx,%rax
pop    %rbx
ret
lea    0xe48(%rip),%rax
pop    %rbx
ret
lea    0xe48(%rip),%rax
pop    %rbx
ret
lea    0xe49(%rip),%rax
pop    %rbx
ret
lea    0xe4e(%rip),%rax
pop    %rbx
ret
lea    0xe56(%rip),%rax
pop    %rbx
ret
lea    0xe5b(%rip),%rax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [4 x i8] c"css\00"
@.str.1 = [9 x i8] c"text/css\00"
@.str.2 = [5 x i8] c"html\00"
@.str.3 = [10 x i8] c"text/html\00"
@.str.4 = [4 x i8] c"gif\00"
@.str.5 = [10 x i8] c"image/gif\00"
@.str.6 = [4 x i8] c"ico\00"
@.str.7 = [13 x i8] c"image/x-icon\00"
@.str.8 = [4 x i8] c"jpg\00"
@.str.9 = [11 x i8] c"image/jpeg\00"
@.str.10 = [3 x i8] c"js\00"
@.str.11 = [16 x i8] c"text/javascript\00"
@.str.12 = [4 x i8] c"png\00"
@.str.13 = [10 x i8] c"image/png\00"
define i8* @lookup(i8* %0) {
%2 = alloca i8*
store i8* %0, i8** %2
%3 = load i8*, i8** %2
%4 = call i64 @strcasecmp(i8* %3, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
%5 = icmp eq i64 %4, 0
br i1 %5, label %6, label %7
6: ; preds = %1
br label %48
7: ; preds = %1
%8 = load i8*, i8** %2
%9 = call i64 @strcasecmp(i8* %8, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0))
%10 = icmp eq i64 %9, 0
br i1 %10, label %11, label %12
11: ; preds = %7
br label %46
12: ; preds = %7
%13 = load i8*, i8** %2
%14 = call i64 @strcasecmp(i8* %13, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0))
%15 = icmp eq i64 %14, 0
br i1 %15, label %16, label %17
16: ; preds = %12
br label %44
17: ; preds = %12
%18 = load i8*, i8** %2
%19 = call i64 @strcasecmp(i8* %18, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.6, i64 0, i64 0))
%20 = icmp eq i64 %19, 0
br i1 %20, label %21, label %22
21: ; preds = %17
br label %42
22: ; preds = %17
%23 = load i8*, i8** %2
%24 = call i64 @strcasecmp(i8* %23, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.8, i64 0, i64 0))
%25 = icmp eq i64 %24, 0
br i1 %25, label %26, label %27
26: ; preds = %22
br label %40
27: ; preds = %22
%28 = load i8*, i8** %2
%29 = call i64 @strcasecmp(i8* %28, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.10, i64 0, i64 0))
%30 = icmp eq i64 %29, 0
br i1 %30, label %31, label %32
31: ; preds = %27
br label %38
32: ; preds = %27
%33 = load i8*, i8** %2
%34 = call i64 @strcasecmp(i8* %33, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.12, i64 0, i64 0))
%35 = icmp eq i64 %34, 0
%36 = zext i1 %35 to i64
%37 = select i1 %35, i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.13, i64 0, i64 0), i8* null
br label %38
38: ; preds = %32, %31
%39 = phi i8* [ getelementptr inbounds ([16 x i8], [16 x i8]* @.str.11, i64 0, i64 0), %31 ], [ %37, %32 ]
br label %40
40: ; preds = %38, %26
%41 = phi i8* [ getelementptr inbounds ([11 x i8], [11 x i8]* @.str.9, i64 0, i64 0), %26 ], [ %39, %38 ]
br label %42
42: ; preds = %40, %21
%43 = phi i8* [ getelementptr inbounds ([13 x i8], [13 x i8]* @.str.7, i64 0, i64 0), %21 ], [ %41, %40 ]
br label %44
44: ; preds = %42, %16
%45 = phi i8* [ getelementptr inbounds ([10 x i8], [10 x i8]* @.str.5, i64 0, i64 0), %16 ], [ %43, %42 ]
br label %46
46: ; preds = %44, %11
%47 = phi i8* [ getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0), %11 ], [ %45, %44 ]
br label %48
48: ; preds = %46, %6
%49 = phi i8* [ getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), %6 ], [ %47, %46 ]
ret i8* %49
}

LLVM IR (-O2):
@.str = [4 x i8] c"css\00"
@.str.1 = [9 x i8] c"text/css\00"
@.str.2 = [5 x i8] c"html\00"
@.str.3 = [10 x i8] c"text/html\00"
@.str.4 = [4 x i8] c"gif\00"
@.str.5 = [10 x i8] c"image/gif\00"
@.str.6 = [4 x i8] c"ico\00"
@.str.7 = [13 x i8] c"image/x-icon\00"
@.str.8 = [4 x i8] c"jpg\00"
@.str.9 = [11 x i8] c"image/jpeg\00"
@.str.10 = [3 x i8] c"js\00"
@.str.11 = [16 x i8] c"text/javascript\00"
@.str.12 = [4 x i8] c"png\00"
@.str.13 = [10 x i8] c"image/png\00"
define i8* @lookup(i8* nocapture %0) {
%2 = tail call i64 @strcasecmp(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 %23, label %4
4: ; preds = %1
%5 = tail call i64 @strcasecmp(i8* %0, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0))
%6 = icmp eq i64 %5, 0
br i1 %6, label %23, label %7
7: ; preds = %4
%8 = tail call i64 @strcasecmp(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 %23, label %10
10: ; preds = %7
%11 = tail call i64 @strcasecmp(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 %23, label %13
13: ; preds = %10
%14 = tail call i64 @strcasecmp(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 %23, label %16
16: ; preds = %13
%17 = tail call i64 @strcasecmp(i8* %0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.10, i64 0, i64 0))
%18 = icmp eq i64 %17, 0
br i1 %18, label %23, label %19
19: ; preds = %16
%20 = tail call i64 @strcasecmp(i8* %0, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.12, i64 0, i64 0))
%21 = icmp eq i64 %20, 0
%22 = select i1 %21, i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.13, i64 0, i64 0), i8* null
br label %23
23: ; preds = %4, %10, %19, %16, %13, %7, %1
%24 = phi i8* [ getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), %1 ], [ getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0), %4 ], [ getelementptr inbounds ([10 x i8], [10 x i8]* @.str.5, i64 0, i64 0), %7 ], [ getelementptr inbounds ([13 x i8], [13 x i8]* @.str.7, i64 0, i64 0), %10 ], [ getelementptr inbounds ([11 x i8], [11 x i8]* @.str.9, i64 0, i64 0), %13 ], [ %22, %19 ], [ getelementptr inbounds ([16 x i8], [16 x i8]* @.str.11, i64 0, i64 0), %16 ]
ret i8* %24
}