#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 getchar();
int /*<<< orphan*/ printf(char *, ...);
int main() {
  char lt;
  printf("entre com uma letra MAIUSCULA: ");
  lt = getchar();
  printf("\n caracter lido=%c", lt);
  printf("\n%d", lt);
  printf("\n conversão para minúscula= %c\n", lt + 32);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    $0x0,%al
call   1040 <getchar@plt>
mov    %al,-0x5(%rbp)
movsbl -0x5(%rbp),%esi
lea    0xece(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movsbl -0x5(%rbp),%esi
lea    0xecf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movsbl -0x5(%rbp),%esi
add    $0x20,%esi
lea    0xebe(%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    0xed8(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
call   1040 <getchar@plt>
movsbl %al,%ebx
lea    0xee0(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xee3(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1030 <printf@plt>
add    $0x20,%ebx
lea    0xed4(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [32 x i8] c"entre com uma letra MAIUSCULA: \00"
@.str.1 = [19 x i8] c"\0A caracter lido=%c\00"
@.str.2 = [4 x i8] c"\0A%d\00"
@.str.3 = [34 x i8] c"\0A convers\C3\A3o para min\C3\BAscula= %c\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i8
store i32 0, i32* %1
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str, i64 0, i64 0))
%4 = call signext i8 (...) @getchar()
store i8 %4, i8* %2
%5 = load i8, i8* %2
%6 = sext i8 %5 to i32
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.1, i64 0, i64 0), i32 %6)
%8 = load i8, i8* %2
%9 = sext i8 %8 to i32
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %9)
%11 = load i8, i8* %2
%12 = sext i8 %11 to i32
%13 = add nsw i32 %12, 32
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str.3, i64 0, i64 0), i32 %13)
ret i32 0
}

LLVM IR (-O2):
@.str = [32 x i8] c"entre com uma letra MAIUSCULA: \00"
@.str.1 = [19 x i8] c"\0A caracter lido=%c\00"
@.str.2 = [4 x i8] c"\0A%d\00"
@.str.3 = [34 x i8] c"\0A convers\C3\A3o para min\C3\BAscula= %c\0A\00"
define i32 @main() {
%1 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([32 x i8], [32 x i8]* @.str, i64 0, i64 0))
%2 = tail call signext i8 (...) @getchar()
%3 = sext i8 %2 to i32
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.1, i64 0, i64 0), i32 %3)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %3)
%6 = add nsw i32 %3, 32
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([34 x i8], [34 x i8]* @.str.3, i64 0, i64 0), i32 %6)
ret i32 0
}