#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*/ free(char *);
scalar_t__ malloc(int);
int /*<<< orphan*/ printf(char *, char *, char *);
scalar_t__ realloc(char *, int);
int /*<<< orphan*/ strcat(char *, char *);
int /*<<< orphan*/ strcpy(char *, char *);
int main() {
  char *str;
  str = (char *)malloc(23);
  strcpy(str, "http://gen.upwr.edu.pl/");
  printf("string = %s, address = %p\n", str, str);
  str = (char *)realloc(str, 33);
  strcat(str, "stanczyk/");
  printf("string = %s, address = %p\n", str, str);
  free(str);
  return (0);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    $0x17,%edi
call   1060 <malloc@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe78(%rip),%rsi
call   1040 <strcpy@plt>
mov    -0x10(%rbp),%rsi
mov    -0x10(%rbp),%rdx
lea    0xe7c(%rip),%rdi
call   1050 <printf@plt>
mov    -0x10(%rbp),%rdi
mov    $0x21,%esi
call   1070 <realloc@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe75(%rip),%rsi
call   1080 <strcat@plt>
mov    -0x10(%rbp),%rsi
mov    -0x10(%rbp),%rdx
lea    0xe46(%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    $0x17,%edi
call   1060 <malloc@plt>
mov    %rax,%rbx
lea    0xe88(%rip),%rsi
mov    %rax,%rdi
call   1040 <strcpy@plt>
lea    0xe91(%rip),%r14
mov    %r14,%rdi
mov    %rbx,%rsi
mov    %rbx,%rdx
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x21,%esi
call   1070 <realloc@plt>
mov    %rax,%rbx
lea    0xe87(%rip),%rsi
mov    %rax,%rdi
call   1080 <strcat@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
mov    %rbx,%rdx
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 = [24 x i8] c"http://gen.upwr.edu.pl/\00"
@.str.1 = [27 x i8] c"string = %s, address = %p\0A\00"
@.str.2 = [10 x i8] c"stanczyk/\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i8*
store i32 0, i32* %1
%3 = call i64 @malloc(i32 23)
%4 = inttoptr i64 %3 to i8*
store i8* %4, i8** %2
%5 = load i8*, i8** %2
%6 = call i32 @strcpy(i8* %5, i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str, i64 0, i64 0))
%7 = load i8*, i8** %2
%8 = load i8*, i8** %2
%9 = call i32 @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.1, i64 0, i64 0), i8* %7, i8* %8)
%10 = load i8*, i8** %2
%11 = call i64 @realloc(i8* %10, i32 33)
%12 = inttoptr i64 %11 to i8*
store i8* %12, i8** %2
%13 = load i8*, i8** %2
%14 = call i32 @strcat(i8* %13, i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0))
%15 = load i8*, i8** %2
%16 = load i8*, i8** %2
%17 = call i32 @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.1, i64 0, i64 0), i8* %15, i8* %16)
%18 = load i8*, i8** %2
%19 = call i32 @free(i8* %18)
ret i32 0
}

LLVM IR (-O2):
@.str = [24 x i8] c"http://gen.upwr.edu.pl/\00"
@.str.1 = [27 x i8] c"string = %s, address = %p\0A\00"
@.str.2 = [10 x i8] c"stanczyk/\00"
define i32 @main() {
%1 = tail call i64 @malloc(i32 23)
%2 = inttoptr i64 %1 to i8*
%3 = tail call i32 @strcpy(i8* %2, i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str, i64 0, i64 0))
%4 = tail call i32 @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.1, i64 0, i64 0), i8* %2, i8* %2)
%5 = tail call i64 @realloc(i8* %2, i32 33)
%6 = inttoptr i64 %5 to i8*
%7 = tail call i32 @strcat(i8* %6, i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0))
%8 = tail call i32 @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.1, i64 0, i64 0), i8* %6, i8* %6)
%9 = tail call i32 @free(i8* %6)
ret i32 0
}