#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*/ perror(char *);
int pipe(int *);
int /*<<< orphan*/ printf(char *, ...);
int main(void) {
  int pipefd[2];
  if (pipe(pipefd) == -1) {
    perror("Couldn't create the pipe");
  }
  int fd_read = pipefd[0];
  int fd_write = pipefd[1];
  printf("Pipe File Descriptors\n");
  printf("  Read end:  %d\n", fd_read);
  printf("  Write end: %d\n", fd_write);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    -0xc(%rbp),%rdi
call   1040 <pipe@plt>
cmp    $0xffffffff,%eax
jne    115d <main+0x2d>
lea    0xea8(%rip),%rdi
call   1050 <perror@plt>
mov    -0xc(%rbp),%eax
mov    %eax,-0x10(%rbp)
mov    -0x8(%rbp),%eax
mov    %eax,-0x14(%rbp)
lea    0xea9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%esi
lea    0xeaf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%esi
lea    0xeaf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
mov    %rsp,%rdi
call   1050 <pipe@plt>
cmp    $0xffffffff,%eax
je     118c <main+0x4c>
mov    (%rsp),%ebx
mov    0x4(%rsp),%ebp
lea    0xedd(%rip),%rdi
call   1030 <puts@plt>
lea    0xeaf(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xeb0(%rip),%rdi
mov    %ebp,%esi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret
lea    0xe6d(%rip),%rdi
call   1060 <perror@plt>
jmp    1150 <main+0x10>

LLVM IR (-O0):
@.str = [25 x i8] c"Couldn't create the pipe\00"
@.str.1 = [23 x i8] c"Pipe File Descriptors\0A\00"
@.str.2 = [17 x i8] c" Read end: %d\0A\00"
@.str.3 = [17 x i8] c" Write end: %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [2 x i32]
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
%5 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 0
%6 = call i32 @pipe(i32* %5)
%7 = icmp eq i32 %6, -1
br i1 %7, label %8, label %10
8: ; preds = %0
%9 = call i32 @perror(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0))
br label %10
10: ; preds = %8, %0
%11 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 0
%12 = load i32, i32* %11
store i32 %12, i32* %3
%13 = getelementptr inbounds [2 x i32], [2 x i32]* %2, i64 0, i64 1
%14 = load i32, i32* %13
store i32 %14, i32* %4
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.1, i64 0, i64 0))
%16 = load i32, i32* %3
%17 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %16)
%18 = load i32, i32* %4
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0), i32 %18)
%20 = load i32, i32* %1
ret i32 %20
}

LLVM IR (-O2):
@.str = [25 x i8] c"Couldn't create the pipe\00"
@.str.2 = [17 x i8] c" Read end: %d\0A\00"
@.str.3 = [17 x i8] c" Write end: %d\0A\00"
@str = [22 x i8] c"Pipe File Descriptors\00"
define i32 @main() {
%1 = alloca [2 x i32]
%2 = bitcast [2 x i32]* %1 to i8*
%3 = getelementptr inbounds [2 x i32], [2 x i32]* %1, i64 0, i64 0
%4 = call i32 @pipe(i32* %3)
%5 = icmp eq i32 %4, -1
br i1 %5, label %6, label %8
6: ; preds = %0
%7 = call i32 @perror(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0))
br label %8
8: ; preds = %6, %0
%9 = load i32, i32* %3
%10 = getelementptr inbounds [2 x i32], [2 x i32]* %1, i64 0, i64 1
%11 = load i32, i32* %10
%12 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str, i64 0, i64 0))
%13 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %9)
%14 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0), i32 %11)
ret i32 0
}