#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 *, int *, int *);
int main(void) {
  int hour = 0, minute = 0;
  printf("enter a 24-hour time:\n");
  scanf("%d:%d", &hour, &minute);
  printf("equivalent 12-hour time:");
  if (hour > 12) {
    printf(" %d:%d PM\n", hour - 12, minute);
  } else {
    printf(" %d:%d AM\n", hour, minute);
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0x8(%rbp)
movl   $0x0,-0xc(%rbp)
lea    0xebc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec5(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
call   1040 <scanf@plt>
lea    0xeb7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
cmpl   $0xc,-0x8(%rbp)
jle    1193 <main+0x73>
mov    -0x8(%rbp),%esi
sub    $0xc,%esi
mov    -0xc(%rbp),%edx
lea    0xeaf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    11a7 <main+0x87>
mov    -0x8(%rbp),%esi
mov    -0xc(%rbp),%edx
lea    0xea1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
movl   $0x0,0x4(%rsp)
movl   $0x0,(%rsp)
lea    0xeee(%rip),%rdi
call   1030 <puts@plt>
lea    0xead(%rip),%rdi
lea    0x4(%rsp),%rsi
mov    %rsp,%rdx
call   1050 <scanf@plt>
lea    0xe9f(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    0x4(%rsp),%esi
cmp    $0xd,%esi
jl     1186 <main+0x56>
add    $0xfffffff4,%esi
mov    (%rsp),%edx
lea    0xe9b(%rip),%rdi
jmp    1190 <main+0x60>
mov    (%rsp),%edx
lea    0xe9a(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [23 x i8] c"enter a 24-hour time:\0A\00"
@.str.1 = [6 x i8] c"%d:%d\00"
@.str.2 = [25 x i8] c"equivalent 12-hour time:\00"
@.str.3 = [11 x i8] c" %d:%d PM\0A\00"
@.str.4 = [11 x i8] c" %d:%d AM\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %2
store i32 0, i32* %3
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32* %2, i32* %3)
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0))
%7 = load i32, i32* %2
%8 = icmp sgt i32 %7, 12
br i1 %8, label %9, label %14
9: ; preds = %0
%10 = load i32, i32* %2
%11 = sub nsw i32 %10, 12
%12 = load i32, i32* %3
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 %11, i32 %12)
br label %18
14: ; preds = %0
%15 = load i32, i32* %2
%16 = load i32, i32* %3
%17 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.4, i64 0, i64 0), i32 %15, i32 %16)
br label %18
18: ; preds = %14, %9
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [6 x i8] c"%d:%d\00"
@.str.2 = [25 x i8] c"equivalent 12-hour time:\00"
@.str.3 = [11 x i8] c" %d:%d PM\0A\00"
@.str.4 = [11 x i8] c" %d:%d AM\0A\00"
@str = [22 x i8] c"enter a 24-hour time:\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
store i32 0, i32* %1
%4 = bitcast i32* %2 to i8*
store i32 0, i32* %2
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32* %1, i32* %2)
%7 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0))
%8 = load i32, i32* %1
%9 = icmp sgt i32 %8, 12
br i1 %9, label %10, label %14
10: ; preds = %0
%11 = add nsw i32 %8, -12
%12 = load i32, i32* %2
%13 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i32 %11, i32 %12)
br label %17
14: ; preds = %0
%15 = load i32, i32* %2
%16 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.4, i64 0, i64 0), i32 %8, i32 %15)
br label %17
17: ; preds = %14, %10
ret i32 0
}