#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 */
char *addStrings(char *, char *);
int /*<<< orphan*/ printf(char *, char *, ...);
int main() {
  char *n0 = "0";
  char *n1 = "988888888889";
  char *n2 = "11111111111";
  char *n3 = "11111111110";
  printf("%s\n", addStrings(n0, n0));
  printf("%s\n%s\n", addStrings(n1, n2), addStrings(n1, n3));
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeed(%rip),%rax
mov    %rax,-0x10(%rbp)
lea    0xebf(%rip),%rax
mov    %rax,-0x18(%rbp)
lea    0xec1(%rip),%rax
mov    %rax,-0x20(%rbp)
lea    0xec2(%rip),%rax
mov    %rax,-0x28(%rbp)
mov    -0x10(%rbp),%rdi
mov    -0x10(%rbp),%rsi
call   1040 <addStrings@plt>
mov    %rax,%rsi
lea    0xeb6(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x18(%rbp),%rdi
mov    -0x20(%rbp),%rsi
call   1040 <addStrings@plt>
mov    %rax,-0x30(%rbp)
mov    -0x18(%rbp),%rdi
mov    -0x28(%rbp),%rsi
call   1040 <addStrings@plt>
mov    -0x30(%rbp),%rsi
mov    %rax,%rdx
lea    0xe80(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
lea    0xef8(%rip),%rdi
mov    %rdi,%rsi
call   1040 <addStrings@plt>
lea    0xeee(%rip),%rdi
mov    %rax,%rsi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xeb5(%rip),%r14
lea    0xebb(%rip),%rsi
mov    %r14,%rdi
call   1040 <addStrings@plt>
mov    %rax,%rbx
lea    0xeb5(%rip),%rsi
mov    %r14,%rdi
call   1040 <addStrings@plt>
lea    0xeb2(%rip),%rdi
mov    %rbx,%rsi
mov    %rax,%rdx
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [2 x i8] c"0\00"
@.str.1 = [13 x i8] c"988888888889\00"
@.str.2 = [12 x i8] c"11111111111\00"
@.str.3 = [12 x i8] c"11111111110\00"
@.str.4 = [4 x i8] c"%s\0A\00"
@.str.5 = [7 x i8] c"%s\0A%s\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i8*
store i32 0, i32* %1
store i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0), i8** %2
store i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8** %3
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0), i8** %4
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.3, i64 0, i64 0), i8** %5
%6 = load i8*, i8** %2
%7 = load i8*, i8** %2
%8 = call i8* @addStrings(i8* %6, i8* %7)
%9 = call i32 (i8*, i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i8* %8)
%10 = load i8*, i8** %3
%11 = load i8*, i8** %4
%12 = call i8* @addStrings(i8* %10, i8* %11)
%13 = load i8*, i8** %3
%14 = load i8*, i8** %5
%15 = call i8* @addStrings(i8* %13, i8* %14)
%16 = call i32 (i8*, i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0), i8* %12, i8* %15)
ret i32 0
}

LLVM IR (-O2):
@.str = [2 x i8] c"0\00"
@.str.1 = [13 x i8] c"988888888889\00"
@.str.2 = [12 x i8] c"11111111111\00"
@.str.3 = [12 x i8] c"11111111110\00"
@.str.4 = [4 x i8] c"%s\0A\00"
@.str.5 = [7 x i8] c"%s\0A%s\0A\00"
define i32 @main() {
%1 = tail call i8* @addStrings(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%2 = tail call i32 (i8*, i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0), i8* %1)
%3 = tail call i8* @addStrings(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.2, i64 0, i64 0))
%4 = tail call i8* @addStrings(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.3, i64 0, i64 0))
%5 = tail call i32 (i8*, i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0), i8* %3, i8* %4)
ret i32 0
}