#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 *addBinary(char *, char *);
int /*<<< orphan*/ printf(char *, char *);
void main() {
  char *a = "1001";
  char *b = "11";
  printf("a is: %s\n", a);
  printf("b is: %s\n", b);
  char *res = addBinary(a, b);
  printf("Result is: %s\n", res);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
lea    0xed1(%rip),%rax
mov    %rax,-0x8(%rbp)
lea    0xecb(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x8(%rbp),%rsi
lea    0xebf(%rip),%rdi
call   1030 <printf@plt>
mov    -0x10(%rbp),%rsi
lea    0xeb9(%rip),%rdi
call   1030 <printf@plt>
mov    -0x8(%rbp),%rdi
mov    -0x10(%rbp),%rsi
call   1040 <addBinary@plt>
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rsi
lea    0xea2(%rip),%rdi
call   1030 <printf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
lea    0xedd(%rip),%rdi
lea    0xece(%rip),%r14
mov    %r14,%rsi
call   1030 <printf@plt>
lea    0xed1(%rip),%rdi
lea    0xebd(%rip),%rbx
mov    %rbx,%rsi
call   1030 <printf@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1040 <addBinary@plt>
lea    0xeba(%rip),%rdi
mov    %rax,%rsi
add    $0x8,%rsp
pop    %rbx
pop    %r14
jmp    1030 <printf@plt>

LLVM IR (-O0):
@.str = [5 x i8] c"1001\00"
@.str.1 = [3 x i8] c"11\00"
@.str.2 = [10 x i8] c"a is: %s\0A\00"
@.str.3 = [10 x i8] c"b is: %s\0A\00"
@.str.4 = [15 x i8] c"Result is: %s\0A\00"
define void @main() {
%1 = alloca i8*
%2 = alloca i8*
%3 = alloca i8*
store i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8** %1
store i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8** %2
%4 = load i8*, i8** %1
%5 = call i32 @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i8* %4)
%6 = load i8*, i8** %2
%7 = call i32 @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0), i8* %6)
%8 = load i8*, i8** %1
%9 = load i8*, i8** %2
%10 = call i8* @addBinary(i8* %8, i8* %9)
store i8* %10, i8** %3
%11 = load i8*, i8** %3
%12 = call i32 @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.4, i64 0, i64 0), i8* %11)
ret void
}

LLVM IR (-O2):
@.str = [5 x i8] c"1001\00"
@.str.1 = [3 x i8] c"11\00"
@.str.2 = [10 x i8] c"a is: %s\0A\00"
@.str.3 = [10 x i8] c"b is: %s\0A\00"
@.str.4 = [15 x i8] c"Result is: %s\0A\00"
define void @main() {
%1 = tail call i32 @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0))
%2 = tail call i32 @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
%3 = tail call i8* @addBinary(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0))
%4 = tail call i32 @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.4, i64 0, i64 0), i8* %3)
ret void
}