#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__ calloc(int, int);
int /*<<< orphan*/ free(char *);
scalar_t__ malloc(int);
int /*<<< orphan*/ printf(char *, char *);
scalar_t__ realloc(char *, int);
int /*<<< orphan*/ strcat(char *, char *);
int /*<<< orphan*/ strcpy(char *, char *);
int main(void) {
  char *str;
  str = (char *)malloc(15 * sizeof(char));
  free(str);
  str = (char *)calloc(15, sizeof(char));
  strcpy(str, "tutorialspoint");
  printf("String = %s\n", str);
  str = (char *)realloc(str, 30);
  strcat(str, ".com");
  printf("String = %s\n", str);
  free(str);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    $0xf,%edi
call   1070 <malloc@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
call   1030 <free@plt>
mov    $0xf,%edi
mov    $0x1,%esi
call   1060 <calloc@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe4c(%rip),%rsi
call   1040 <strcpy@plt>
mov    -0x10(%rbp),%rsi
lea    0xe4b(%rip),%rdi
call   1050 <printf@plt>
mov    -0x10(%rbp),%rdi
mov    $0x1e,%esi
call   1080 <realloc@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe36(%rip),%rsi
call   1090 <strcat@plt>
mov    -0x10(%rbp),%rsi
lea    0xe19(%rip),%rdi
call   1050 <printf@plt>
mov    -0x10(%rbp),%rdi
call   1030 <free@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
mov    $0xf,%edi
call   1070 <malloc@plt>
mov    %rax,%rdi
call   1030 <free@plt>
mov    $0xf,%edi
mov    $0x1,%esi
call   1060 <calloc@plt>
mov    %rax,%rbx
lea    0xe61(%rip),%rsi
mov    %rax,%rdi
call   1040 <strcpy@plt>
lea    0xe61(%rip),%r14
mov    %r14,%rdi
mov    %rbx,%rsi
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x1e,%esi
call   1080 <realloc@plt>
mov    %rax,%rbx
lea    0xe4c(%rip),%rsi
mov    %rax,%rdi
call   1090 <strcat@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1050 <printf@plt>
mov    %rbx,%rdi
call   1030 <free@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [15 x i8] c"tutorialspoint\00"
@.str.1 = [13 x i8] c"String = %s\0A\00"
@.str.2 = [5 x i8] c".com\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i8*
store i32 0, i32* %1
%3 = call i64 @malloc(i32 15)
%4 = inttoptr i64 %3 to i8*
store i8* %4, i8** %2
%5 = load i8*, i8** %2
%6 = call i32 @free(i8* %5)
%7 = call i64 @calloc(i32 15, i32 1)
%8 = inttoptr i64 %7 to i8*
store i8* %8, i8** %2
%9 = load i8*, i8** %2
%10 = call i32 @strcpy(i8* %9, i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
%11 = load i8*, i8** %2
%12 = call i32 @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8* %11)
%13 = load i8*, i8** %2
%14 = call i64 @realloc(i8* %13, i32 30)
%15 = inttoptr i64 %14 to i8*
store i8* %15, i8** %2
%16 = load i8*, i8** %2
%17 = call i32 @strcat(i8* %16, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0))
%18 = load i8*, i8** %2
%19 = call i32 @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8* %18)
%20 = load i8*, i8** %2
%21 = call i32 @free(i8* %20)
ret i32 0
}

LLVM IR (-O2):
@.str = [15 x i8] c"tutorialspoint\00"
@.str.1 = [13 x i8] c"String = %s\0A\00"
@.str.2 = [5 x i8] c".com\00"
define i32 @main() {
%1 = tail call i64 @malloc(i32 15)
%2 = inttoptr i64 %1 to i8*
%3 = tail call i32 @free(i8* %2)
%4 = tail call i64 @calloc(i32 15, i32 1)
%5 = inttoptr i64 %4 to i8*
%6 = tail call i32 @strcpy(i8* %5, i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
%7 = tail call i32 @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8* %5)
%8 = tail call i64 @realloc(i8* %5, i32 30)
%9 = inttoptr i64 %8 to i8*
%10 = tail call i32 @strcat(i8* %9, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0))
%11 = tail call i32 @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8* %9)
%12 = tail call i32 @free(i8* %9)
ret i32 0
}