#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*/ fnReverse(char *);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, char *);
int main(void) {
  char acStr[100];
  printf("\n****************************************************");
  printf("\n*\tPROGRAM TO REVERSE A STRING IN PLACE\t   *\n");
  printf("****************************************************");
  printf("\nEnter a String\n");
  scanf("%s", acStr);
  fnReverse(acStr);
  printf("\nReversed String is\n%s\n", acStr);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x70,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xee2(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe9f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xef4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x70(%rbp),%rsi
lea    0xef3(%rip),%rdi
call   1040 <scanf@plt>
lea    -0x70(%rbp),%rdi
call   1050 <fnReverse@plt>
lea    -0x70(%rbp),%rsi
lea    0xedd(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x70,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x70,%rsp
lea    0xeb4(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xef7(%rip),%rdi
call   1030 <puts@plt>
lea    0xe9b(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xf0a(%rip),%rdi
call   1030 <puts@plt>
lea    0xeb6(%rip),%rdi
mov    %rsp,%rbx
mov    %rbx,%rsi
call   1050 <scanf@plt>
mov    %rbx,%rdi
call   1060 <fnReverse@plt>
lea    0xe9f(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x70,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [54 x i8] c"\0A****************************************************\00"
@.str.1 = [46 x i8] c"\0A*\09PROGRAM TO REVERSE A STRING IN PLACE\09 *\0A\00"
@.str.2 = [53 x i8] c"****************************************************\00"
@.str.3 = [17 x i8] c"\0AEnter a String\0A\00"
@.str.4 = [3 x i8] c"%s\00"
@.str.5 = [24 x i8] c"\0AReversed String is\0A%s\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [100 x i8]
store i32 0, i32* %1
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([54 x i8], [54 x i8]* @.str, i64 0, i64 0))
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([46 x i8], [46 x i8]* @.str.1, i64 0, i64 0))
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([53 x i8], [53 x i8]* @.str.2, i64 0, i64 0))
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0))
%7 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0), i8* %7)
%9 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%10 = call i32 @fnReverse(i8* %9)
%11 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.5, i64 0, i64 0), i8* %11)
ret i32 0
}

LLVM IR (-O2):
@.str = [54 x i8] c"\0A****************************************************\00"
@.str.2 = [53 x i8] c"****************************************************\00"
@.str.4 = [3 x i8] c"%s\00"
@.str.5 = [24 x i8] c"\0AReversed String is\0A%s\0A\00"
@str = [45 x i8] c"\0A*\09PROGRAM TO REVERSE A STRING IN PLACE\09 *\00"
@str.6 = [16 x i8] c"\0AEnter a String\00"
define i32 @main() {
%1 = alloca [100 x i8]
%2 = getelementptr inbounds [100 x i8], [100 x i8]* %1, i64 0, i64 0
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([54 x i8], [54 x i8]* @.str, i64 0, i64 0))
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([45 x i8], [45 x i8]* @str, i64 0, i64 0))
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([53 x i8], [53 x i8]* @.str.2, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @str.6, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0), i8* %2)
%8 = call i32 @fnReverse(i8* %2)
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 x i8]* @.str.5, i64 0, i64 0), i8* %2)
ret i32 0
}