#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 */
int /*<<< orphan*/ strcmp(char const *, char *);
char *proto_default_port(const char *proto) {
  static char port_ftp[] = "21", port_http[] = "80", port_gopher[] = "70";
  if (!strcmp(proto, "ftp"))
    return port_ftp;
  if (!strcmp(proto, "gopher"))
    return port_gopher;
  return port_http;
}


x86 assembly (clang, -O0):
<proto_default_port>:
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,%eax
jne    1145 <proto_default_port+0x35>
lea    0x2eec(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1179 <proto_default_port+0x69>
mov    -0x10(%rbp),%rdi
lea    0xeb4(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    116e <proto_default_port+0x5e>
lea    0x2ec9(%rip),%rax
mov    %rax,-0x8(%rbp)
jmp    1179 <proto_default_port+0x69>
lea    0x2eb6(%rip),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<proto_default_port>:
push   %rbx
mov    %rdi,%rbx
lea    0xee5(%rip),%rsi
call   1030 <strcmp@plt>
test   %eax,%eax
je     1149 <proto_default_port+0x39>
lea    0xed9(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
lea    0x2ef2(%rip),%rcx
lea    0x2ee8(%rip),%rax
cmove  %rcx,%rax
pop    %rbx
ret
lea    0x2ed8(%rip),%rax
pop    %rbx
ret

LLVM IR (-O0):
@proto_default_port.port_ftp = internal global [3 x i8] c"21\00"
@proto_default_port.port_http = internal global [3 x i8] c"80\00"
@proto_default_port.port_gopher = internal global [3 x i8] c"70\00"
@.str = [4 x i8] c"ftp\00"
@.str.1 = [7 x i8] c"gopher\00"
define i8* @proto_default_port(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
store i8* %0, i8** %3
%4 = load i8*, i8** %3
%5 = call i32 @strcmp(i8* %4, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
%6 = icmp ne i32 %5, 0
br i1 %6, label %8, label %7
7: ; preds = %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @proto_default_port.port_ftp, i64 0, i64 0), i8** %2
br label %14
8: ; preds = %1
%9 = load i8*, i8** %3
%10 = call i32 @strcmp(i8* %9, i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0))
%11 = icmp ne i32 %10, 0
br i1 %11, label %13, label %12
12: ; preds = %8
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @proto_default_port.port_gopher, i64 0, i64 0), i8** %2
br label %14
13: ; preds = %8
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @proto_default_port.port_http, i64 0, i64 0), i8** %2
br label %14
14: ; preds = %13, %12, %7
%15 = load i8*, i8** %2
ret i8* %15
}

LLVM IR (-O2):
@proto_default_port.port_ftp = internal global [3 x i8] c"21\00"
@proto_default_port.port_http = internal global [3 x i8] c"80\00"
@proto_default_port.port_gopher = internal global [3 x i8] c"70\00"
@.str = [4 x i8] c"ftp\00"
@.str.1 = [7 x i8] c"gopher\00"
define i8* @proto_default_port(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 %8, label %4
4: ; preds = %1
%5 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(7) getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0))
%6 = icmp eq i32 %5, 0
%7 = select i1 %6, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @proto_default_port.port_gopher, i64 0, i64 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @proto_default_port.port_http, i64 0, i64 0)
br label %8
8: ; preds = %4, %1
%9 = phi i8* [ getelementptr inbounds ([3 x i8], [3 x i8]* @proto_default_port.port_ftp, i64 0, i64 0), %1 ], [ %7, %4 ]
ret i8* %9
}