#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*/ clear();
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, char *);
int main() {
  char name[20];
  char gender;
  printf("please input name : ");
  scanf("%s", name);
  clear();
  printf("please input gender(M/F) : ");
  scanf(" %c", &gender);
  printf("name : %s , gender : %c \n", name, gender);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    -0x20(%rbp),%rsi
lea    0xebd(%rip),%rdi
call   1040 <scanf@plt>
mov    $0x0,%al
call   1050 <clear@plt>
lea    0xead(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xebb(%rip),%rdi
lea    -0x21(%rbp),%rsi
call   1040 <scanf@plt>
lea    -0x20(%rbp),%rsi
movsbl -0x21(%rbp),%edx
lea    0xea7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x30,%rsp
lea    0xec4(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xecb(%rip),%rdi
lea    0x10(%rsp),%rbx
mov    %rbx,%rsi
call   1040 <scanf@plt>
xor    %eax,%eax
call   1050 <clear@plt>
lea    0xeb3(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xec1(%rip),%rdi
lea    0xf(%rsp),%rsi
call   1040 <scanf@plt>
movsbl 0xf(%rsp),%edx
lea    0xeaf(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [21 x i8] c"please input name : \00"
@.str.1 = [3 x i8] c"%s\00"
@.str.2 = [28 x i8] c"please input gender(M/F) : \00"
@.str.3 = [4 x i8] c" %c\00"
@.str.4 = [26 x i8] c"name : %s , gender : %c \0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [20 x i8]
%3 = alloca i8
store i32 0, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0))
%5 = getelementptr inbounds [20 x i8], [20 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 = call i32 (...) @clear()
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.2, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i8* %3)
%10 = getelementptr inbounds [20 x i8], [20 x i8]* %2, i64 0, i64 0
%11 = load i8, i8* %3
%12 = sext i8 %11 to i32
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.4, i64 0, i64 0), i8* %10, i32 %12)
ret i32 0
}

LLVM IR (-O2):
@.str = [21 x i8] c"please input name : \00"
@.str.1 = [3 x i8] c"%s\00"
@.str.2 = [28 x i8] c"please input gender(M/F) : \00"
@.str.3 = [4 x i8] c" %c\00"
@.str.4 = [26 x i8] c"name : %s , gender : %c \0A\00"
define i32 @main() {
%1 = alloca [20 x i8]
%2 = alloca i8
%3 = getelementptr inbounds [20 x i8], [20 x i8]* %1, i64 0, i64 0
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* %3)
%6 = call i32 (...) @clear()
%7 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 x i8]* @.str.2, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i8* %2)
%9 = load i8, i8* %2
%10 = sext i8 %9 to i32
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @.str.4, i64 0, i64 0), i8* %3, i32 %10)
ret i32 0
}