#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__ malloc(int);
int /*<<< orphan*/ strcat(char *, char *);
int /*<<< orphan*/ strcpy(char *, char *);
int strlen(char *);
char *CreateTag(char *inicio, char *tag, char *fim) {
  char *element = (char *)malloc(sizeof(char) *
                                 (strlen(inicio) + strlen(tag) + strlen(fim)));
  strcpy(element, inicio);
  strcat(element, tag);
  strcat(element, fim);
  return element;
}


x86 assembly (clang, -O0):
<CreateTag>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %rdx,-0x18(%rbp)
mov    -0x8(%rbp),%rdi
call   1040 <strlen@plt>
mov    %eax,-0x28(%rbp)
mov    -0x10(%rbp),%rdi
call   1040 <strlen@plt>
mov    %eax,%ecx
mov    -0x28(%rbp),%eax
add    %ecx,%eax
mov    %eax,-0x24(%rbp)
mov    -0x18(%rbp),%rdi
call   1040 <strlen@plt>
mov    %eax,%ecx
mov    -0x24(%rbp),%eax
add    %ecx,%eax
cltq
shl    $0x0,%rax
mov    %eax,%edi
call   1050 <malloc@plt>
mov    %rax,-0x20(%rbp)
mov    -0x20(%rbp),%rdi
mov    -0x8(%rbp),%rsi
call   1030 <strcpy@plt>
mov    -0x20(%rbp),%rdi
mov    -0x10(%rbp),%rsi
call   1060 <strcat@plt>
mov    -0x20(%rbp),%rdi
mov    -0x18(%rbp),%rsi
call   1060 <strcat@plt>
mov    -0x20(%rbp),%rax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<CreateTag>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %rdx,%r14
mov    %rsi,%r15
mov    %rdi,%rbx
call   1040 <strlen@plt>
mov    %eax,%ebp
mov    %r15,%rdi
call   1040 <strlen@plt>
add    %eax,%ebp
mov    %r14,%rdi
call   1040 <strlen@plt>
add    %eax,%ebp
mov    %ebp,%edi
call   1050 <malloc@plt>
mov    %rax,%rbp
mov    %rax,%rdi
mov    %rbx,%rsi
call   1030 <strcpy@plt>
mov    %rbp,%rdi
mov    %r15,%rsi
call   1060 <strcat@plt>
mov    %rbp,%rdi
mov    %r14,%rsi
call   1060 <strcat@plt>
mov    %rbp,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
define i8* @CreateTag(i8* %0, i8* %1, i8* %2) {
%4 = alloca i8*
%5 = alloca i8*
%6 = alloca i8*
%7 = alloca i8*
store i8* %0, i8** %4
store i8* %1, i8** %5
store i8* %2, i8** %6
%8 = load i8*, i8** %4
%9 = call i32 @strlen(i8* %8)
%10 = load i8*, i8** %5
%11 = call i32 @strlen(i8* %10)
%12 = add nsw i32 %9, %11
%13 = load i8*, i8** %6
%14 = call i32 @strlen(i8* %13)
%15 = add nsw i32 %12, %14
%16 = sext i32 %15 to i64
%17 = mul i64 1, %16
%18 = trunc i64 %17 to i32
%19 = call i64 @malloc(i32 %18)
%20 = inttoptr i64 %19 to i8*
store i8* %20, i8** %7
%21 = load i8*, i8** %7
%22 = load i8*, i8** %4
%23 = call i32 @strcpy(i8* %21, i8* %22)
%24 = load i8*, i8** %7
%25 = load i8*, i8** %5
%26 = call i32 @strcat(i8* %24, i8* %25)
%27 = load i8*, i8** %7
%28 = load i8*, i8** %6
%29 = call i32 @strcat(i8* %27, i8* %28)
%30 = load i8*, i8** %7
ret i8* %30
}

LLVM IR (-O2):
define i8* @CreateTag(i8* %0, i8* %1, i8* %2) {
%4 = tail call i32 @strlen(i8* %0)
%5 = tail call i32 @strlen(i8* %1)
%6 = add nsw i32 %5, %4
%7 = tail call i32 @strlen(i8* %2)
%8 = add nsw i32 %6, %7
%9 = tail call i64 @malloc(i32 %8)
%10 = inttoptr i64 %9 to i8*
%11 = tail call i32 @strcpy(i8* %10, i8* %0)
%12 = tail call i32 @strcat(i8* %10, i8* %1)
%13 = tail call i32 @strcat(i8* %10, i8* %2)
ret i8* %10
}