#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 getch();
char getche();
int /*<<< orphan*/ printf(char *, ...);
char testgetch();
int main() {
  char c;
  printf("(getche example) please type a letter: ");
  c = getche();
  printf("\nYou typed: %c\n", c);
  printf("(getch example) please type a letter...");
  c = getch();
  printf("\nYou typed: %c\n", c);
  c = testgetch();
  printf("\nYou typed: %c\n", c);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeaa(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    $0x0,%al
call   1050 <getche@plt>
mov    %al,-0x5(%rbp)
movsbl -0x5(%rbp),%esi
lea    0xeb6(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeb8(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    $0x0,%al
call   1060 <getch@plt>
mov    %al,-0x5(%rbp)
movsbl -0x5(%rbp),%esi
lea    0xe8c(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    $0x0,%al
call   1040 <testgetch@plt>
mov    %al,-0x5(%rbp)
movsbl -0x5(%rbp),%esi
lea    0xe70(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xeb8(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
call   1050 <getche@plt>
movsbl %al,%esi
lea    0xec8(%rip),%rbx
mov    %rbx,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xec7(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <getch@plt>
movsbl %al,%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
call   1040 <testgetch@plt>
movsbl %al,%esi
mov    %rbx,%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [40 x i8] c"(getche example) please type a letter: \00"
@.str.1 = [16 x i8] c"\0AYou typed: %c\0A\00"
@.str.2 = [40 x i8] c"(getch example) please type a letter...\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i8
store i32 0, i32* %1
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([40 x i8], [40 x i8]* @.str, i64 0, i64 0))
%4 = call signext i8 (...) @getche()
store i8 %4, i8* %2
%5 = load i8, i8* %2
%6 = sext i8 %5 to i32
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i32 %6)
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([40 x i8], [40 x i8]* @.str.2, i64 0, i64 0))
%9 = call signext i8 (...) @getch()
store i8 %9, i8* %2
%10 = load i8, i8* %2
%11 = sext i8 %10 to i32
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i32 %11)
%13 = call signext i8 (...) @testgetch()
store i8 %13, i8* %2
%14 = load i8, i8* %2
%15 = sext i8 %14 to i32
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i32 %15)
ret i32 0
}

LLVM IR (-O2):
@.str = [40 x i8] c"(getche example) please type a letter: \00"
@.str.1 = [16 x i8] c"\0AYou typed: %c\0A\00"
@.str.2 = [40 x i8] c"(getch example) please type a letter...\00"
define i32 @main() {
%1 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([40 x i8], [40 x i8]* @.str, i64 0, i64 0))
%2 = tail call signext i8 (...) @getche()
%3 = sext i8 %2 to i32
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i32 %3)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([40 x i8], [40 x i8]* @.str.2, i64 0, i64 0))
%6 = tail call signext i8 (...) @getch()
%7 = sext i8 %6 to i32
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i32 %7)
%9 = tail call signext i8 (...) @testgetch()
%10 = sext i8 %9 to i32
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i32 %10)
ret i32 0
}