#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 fork();
int getpid();
int /*<<< orphan*/ printf(char *, ...);
int main(int argc, char *argv[]) {
  (void)argc;
  (void)argv;
  printf("A\n");
  int i = getpid();
  printf("pid %d \n", i);
  int j = fork();
  printf("forked: %d \n", j);
  printf("B\n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xeb3(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    $0x0,%al
call   1030 <getpid@plt>
mov    %eax,-0x14(%rbp)
mov    -0x14(%rbp),%esi
lea    0xe9b(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    $0x0,%al
call   1050 <fork@plt>
mov    %eax,-0x18(%rbp)
mov    -0x18(%rbp),%esi
lea    0xe89(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xe88(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xece(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
call   1040 <getpid@plt>
lea    0xea5(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1050 <printf@plt>
xor    %eax,%eax
call   1060 <fork@plt>
lea    0xe97(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xe96(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [3 x i8] c"A\0A\00"
@.str.1 = [9 x i8] c"pid %d \0A\00"
@.str.2 = [13 x i8] c"forked: %d \0A\00"
@.str.3 = [3 x i8] c"B\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i32, i32* %4
%9 = load i8**, i8*** %5
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%11 = call i32 (...) @getpid()
store i32 %11, i32* %6
%12 = load i32, i32* %6
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i32 %12)
%14 = call i32 (...) @fork()
store i32 %14, i32* %7
%15 = load i32, i32* %7
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), i32 %15)
%17 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.3, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [9 x i8] c"pid %d \0A\00"
@.str.2 = [13 x i8] c"forked: %d \0A\00"
@str = [2 x i8] c"A\00"
@str.4 = [2 x i8] c"B\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([2 x i8], [2 x i8]* @str, i64 0, i64 0))
%4 = tail call i32 (...) @getpid()
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0), i32 %4)
%6 = tail call i32 (...) @fork()
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0), i32 %6)
%8 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([2 x i8], [2 x i8]* @str.4, i64 0, i64 0))
ret i32 0
}