#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*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, char **);
char *strlwr(char *);
int main() {
  char str[100];
  printf("%s\n", "Enter your word: ");
  printf("> ");
  scanf("%s", &str);
  printf("%s", strlwr(str));
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x70,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
lea    0xeb7(%rip),%rsi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xebb(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    -0x70(%rbp),%rsi
lea    0xeac(%rip),%rdi
call   1050 <scanf@plt>
lea    -0x70(%rbp),%rdi
call   1030 <strlwr@plt>
mov    %rax,%rsi
lea    0xe94(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x70,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
sub    $0x68,%rsp
lea    0xeb2(%rip),%rdi
call   1040 <puts@plt>
lea    0xeb8(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xead(%rip),%r14
mov    %rsp,%rbx
mov    %r14,%rdi
mov    %rbx,%rsi
call   1060 <scanf@plt>
mov    %rbx,%rdi
call   1030 <strlwr@plt>
mov    %r14,%rdi
mov    %rax,%rsi
xor    %eax,%eax
call   1050 <printf@plt>
xor    %eax,%eax
add    $0x68,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [4 x i8] c"%s\0A\00"
@.str.1 = [18 x i8] c"Enter your word: \00"
@.str.2 = [3 x i8] c"> \00"
@.str.3 = [3 x i8] c"%s\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 ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.1, i64 0, i64 0))
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0))
%5 = bitcast [100 x i8]* %2 to i8**
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8** %5)
%7 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%8 = call i8* @strlwr(i8* %7)
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* %8)
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [18 x i8] c"Enter your word: \00"
@.str.2 = [3 x i8] c"> \00"
@.str.3 = [3 x i8] c"%s\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 @puts(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @.str.1, i64 0, i64 0))
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0))
%5 = bitcast [100 x i8]* %1 to i8**
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8** %5)
%7 = call i8* @strlwr(i8* %2)
%8 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0), i8* %7)
ret i32 0
}