#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*/ palindrome(char *, char *);
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ reverse_string(char *);
int /*<<< orphan*/ scanf(char *, char *);
int /*<<< orphan*/ strcpy(char *, char *);
int main(void) {
  char string[100], stringReversed[100];
  printf("Insert a string: ");
  scanf("%s", string);
  strcpy(stringReversed, string);
  reverse_string(stringReversed);
  palindrome(string, stringReversed);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0xe0,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xe97(%rip),%rdi
call   1050 <printf@plt>
lea    -0x70(%rbp),%rsi
lea    0xe99(%rip),%rdi
call   1070 <scanf@plt>
lea    -0xe0(%rbp),%rdi
lea    -0x70(%rbp),%rsi
call   1040 <strcpy@plt>
lea    -0xe0(%rbp),%rdi
call   1030 <reverse_string@plt>
lea    -0x70(%rbp),%rdi
lea    -0xe0(%rbp),%rsi
call   1060 <palindrome@plt>
xor    %eax,%eax
add    $0xe0,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
sub    $0xd8,%rsp
lea    0xe9f(%rip),%rdi
call   1050 <printf@plt>
lea    0xea5(%rip),%rdi
lea    0x70(%rsp),%r14
mov    %r14,%rsi
call   1070 <scanf@plt>
mov    %rsp,%rbx
mov    %rbx,%rdi
mov    %r14,%rsi
call   1040 <strcpy@plt>
mov    %rbx,%rdi
call   1030 <reverse_string@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1060 <palindrome@plt>
xor    %eax,%eax
add    $0xd8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [18 x i8] c"Insert a string: \00"
@.str.1 = [3 x i8] c"%s\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [100 x i8]
%3 = alloca [100 x i8]
store i32 0, i32* %1
%4 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
%5 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* %5)
%7 = getelementptr inbounds [100 x i8], [100 x i8]* %3, i64 0, i64 0
%8 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%9 = call i32 @strcpy(i8* %7, i8* %8)
%10 = getelementptr inbounds [100 x i8], [100 x i8]* %3, i64 0, i64 0
%11 = call i32 @reverse_string(i8* %10)
%12 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%13 = getelementptr inbounds [100 x i8], [100 x i8]* %3, i64 0, i64 0
%14 = call i32 @palindrome(i8* %12, i8* %13)
ret i32 0
}

LLVM IR (-O2):
@.str = [18 x i8] c"Insert a string: \00"
@.str.1 = [3 x i8] c"%s\00"
define i32 @main() {
%1 = alloca [100 x i8]
%2 = alloca [100 x i8]
%3 = getelementptr inbounds [100 x i8], [100 x i8]* %1, i64 0, i64 0
%4 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%5 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* %3)
%7 = call i32 @strcpy(i8* %4, i8* %3)
%8 = call i32 @reverse_string(i8* %4)
%9 = call i32 @palindrome(i8* %3, i8* %4)
ret i32 0
}