#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 GetInt();
int /*<<< orphan*/ printf(char *);
int main(void) {
  printf("I'd like an integer please: ");
  int n = GetInt();
  if (n > 0) {
    printf("You picked a positive number!\n");
  } else if (n < 0) {
    printf("You picked a negative number!\n");
  } else {
    printf("You picked a zero!\n");
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
call   1030 <printf@plt>
mov    $0x0,%al
call   1040 <GetInt@plt>
mov    %eax,-0x8(%rbp)
cmpl   $0x0,-0x8(%rbp)
jle    1160 <main+0x40>
lea    0xec7(%rip),%rdi
call   1030 <printf@plt>
jmp    118c <main+0x6c>
cmpl   $0x0,-0x8(%rbp)
jge    117b <main+0x5b>
lea    0xecb(%rip),%rdi
call   1030 <printf@plt>
jmp    1187 <main+0x67>
lea    0xed9(%rip),%rdi
call   1030 <printf@plt>
jmp    118c <main+0x6c>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xec8(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
call   1050 <GetInt@plt>
test   %eax,%eax
lea    0xee3(%rip),%rax
lea    0xec9(%rip),%rcx
cmovs  %rax,%rcx
lea    0xeef(%rip),%rdi
cmovle %rcx,%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [29 x i8] c"I'd like an integer please: \00"
@.str.1 = [31 x i8] c"You picked a positive number!\0A\00"
@.str.2 = [31 x i8] c"You picked a negative number!\0A\00"
@.str.3 = [20 x i8] c"You picked a zero!\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str, i64 0, i64 0))
%4 = call i32 (...) @GetInt()
store i32 %4, i32* %2
%5 = load i32, i32* %2
%6 = icmp sgt i32 %5, 0
br i1 %6, label %7, label %9
7: ; preds = %0
%8 = call i32 @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.1, i64 0, i64 0))
br label %17
9: ; preds = %0
%10 = load i32, i32* %2
%11 = icmp slt i32 %10, 0
br i1 %11, label %12, label %14
12: ; preds = %9
%13 = call i32 @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.2, i64 0, i64 0))
br label %16
14: ; preds = %9
%15 = call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.3, i64 0, i64 0))
br label %16
16: ; preds = %14, %12
br label %17
17: ; preds = %16, %7
%18 = load i32, i32* %1
ret i32 %18
}

LLVM IR (-O2):
@.str = [29 x i8] c"I'd like an integer please: \00"
@str = [19 x i8] c"You picked a zero!\00"
@str.4 = [30 x i8] c"You picked a negative number!\00"
@str.5 = [30 x i8] c"You picked a positive number!\00"
define i32 @main() {
%1 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @.str, i64 0, i64 0))
%2 = tail call i32 (...) @GetInt()
%3 = icmp sgt i32 %2, 0
%4 = icmp slt i32 %2, 0
%5 = select i1 %4, i8* getelementptr inbounds ([30 x i8], [30 x i8]* @str.4, i64 0, i64 0), i8* getelementptr inbounds ([19 x i8], [19 x i8]* @str, i64 0, i64 0)
%6 = select i1 %3, i8* getelementptr inbounds ([30 x i8], [30 x i8]* @str.5, i64 0, i64 0), i8* %5
%7 = tail call i32 @puts(i8* dereferenceable(1) %6)
ret i32 0
}