#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*/ exit(int);
scalar_t__ fork();
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int getpid();
int getppid();
int /*<<< orphan*/ printf(char *, int, int);
int /*<<< orphan*/ stdout;
int main(int argc, char *argv[]) {
  char flag;
  int i;
  if (argc < 2) {
    fprintf(stdout, "Usage: %s <character>\n", argv[0]);
    exit(1);
  }
  flag = argv[1][0];
  if (flag == 'a') {
    printf("Shell:%d, This: %d\n", getppid(), getpid());
    for (i = 1; i <= 2; i++) {
      if (!fork())
        printf("Process #%d: %d\n", getpid(), i);
    }
    printf("Process #%d: %d\n", getpid(), i);
  } else if (flag == 'b') {
    printf("Shell:%d, This: %d\n", getppid(), getpid());
    for (i = 3; i > 1; i--) {
      if (fork())
        printf("Process #%d: %d\n", getpid(), i);
    }
    printf("Process #%d: %d\n", getpid(), i);
  } else if (flag == 'c') {
    printf("Shell:%d, This: %d\n", getppid(), getpid());
    for (i = 0; i < 2; i++) {
      if (fork())
        fork();
    }
    printf("Process #%d: %d\n", getpid(), i);
  } else if (flag == 'd') {
    printf("Shell:%d, This: %d\n", getppid(), getpid());
    for (i = 2; i >= 1; i--) {
      if (!fork())
        printf("Process #%d: %d\n", getpid(), -i);
      else
        printf("Process #%d: %d\n", getpid(), i);
    }
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
jge    11a6 <main+0x46>
mov    0x2e59(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xe69(%rip),%rsi
call   1050 <fprintf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rax
mov    (%rax),%al
mov    %al,-0x11(%rbp)
movsbl -0x11(%rbp),%eax
cmp    $0x61,%eax
jne    124c <main+0xec>
mov    $0x0,%al
call   1060 <getppid@plt>
mov    %eax,-0x1c(%rbp)
mov    $0x0,%al
call   1030 <getpid@plt>
mov    -0x1c(%rbp),%esi
mov    %eax,%edx
lea    0xe3a(%rip),%rdi
call   1040 <printf@plt>
movl   $0x1,-0x18(%rbp)
cmpl   $0x2,-0x18(%rbp)
jg     122f <main+0xcf>
mov    $0x0,%al
call   1080 <fork@plt>
cmp    $0x0,%rax
jne    121c <main+0xbc>
mov    $0x0,%al
call   1030 <getpid@plt>
mov    %eax,%esi
mov    -0x18(%rbp),%edx
lea    0xe14(%rip),%rdi
call   1040 <printf@plt>
jmp    1221 <main+0xc1>
mov    -0x18(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x18(%rbp)
jmp    11e9 <main+0x89>
mov    $0x0,%al
call   1030 <getpid@plt>
mov    %eax,%esi
mov    -0x18(%rbp),%edx
lea    0xde9(%rip),%rdi
call   1040 <printf@plt>
jmp    141c <main+0x2bc>
movsbl -0x11(%rbp),%eax
cmp    $0x62,%eax
jne    12e5 <main+0x185>
mov    $0x0,%al
call   1060 <getppid@plt>
mov    %eax,-0x20(%rbp)
mov    $0x0,%al
call   1030 <getpid@plt>
mov    -0x20(%rbp),%esi
mov    %eax,%edx
lea    0xda1(%rip),%rdi
call   1040 <printf@plt>
movl   $0x3,-0x18(%rbp)
cmpl   $0x1,-0x18(%rbp)
jle    12c8 <main+0x168>
mov    $0x0,%al
call   1080 <fork@plt>
cmp    $0x0,%rax
je     12b5 <main+0x155>
mov    $0x0,%al
call   1030 <getpid@plt>
mov    %eax,%esi
mov    -0x18(%rbp),%edx
lea    0xd7b(%rip),%rdi
call   1040 <printf@plt>
jmp    12ba <main+0x15a>
mov    -0x18(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0x18(%rbp)
jmp    1282 <main+0x122>
mov    $0x0,%al
call   1030 <getpid@plt>
mov    %eax,%esi
mov    -0x18(%rbp),%edx
lea    0xd50(%rip),%rdi
call   1040 <printf@plt>
jmp    1417 <main+0x2b7>
movsbl -0x11(%rbp),%eax
cmp    $0x63,%eax
jne    136d <main+0x20d>
mov    $0x0,%al
call   1060 <getppid@plt>
mov    %eax,-0x24(%rbp)
mov    $0x0,%al
call   1030 <getpid@plt>
mov    -0x24(%rbp),%esi
mov    %eax,%edx
lea    0xd08(%rip),%rdi
call   1040 <printf@plt>
movl   $0x0,-0x18(%rbp)
cmpl   $0x2,-0x18(%rbp)
jge    1350 <main+0x1f0>
mov    $0x0,%al
call   1080 <fork@plt>
cmp    $0x0,%rax
je     133d <main+0x1dd>
mov    $0x0,%al
call   1080 <fork@plt>
jmp    1342 <main+0x1e2>
mov    -0x18(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x18(%rbp)
jmp    131b <main+0x1bb>
mov    $0x0,%al
call   1030 <getpid@plt>
mov    %eax,%esi
mov    -0x18(%rbp),%edx
lea    0xcc8(%rip),%rdi
call   1040 <printf@plt>
jmp    1412 <main+0x2b2>
movsbl -0x11(%rbp),%eax
cmp    $0x64,%eax
jne    140d <main+0x2ad>
mov    $0x0,%al
call   1060 <getppid@plt>
mov    %eax,-0x28(%rbp)
mov    $0x0,%al
call   1030 <getpid@plt>
mov    -0x28(%rbp),%esi
mov    %eax,%edx
lea    0xc80(%rip),%rdi
call   1040 <printf@plt>
movl   $0x2,-0x18(%rbp)
cmpl   $0x1,-0x18(%rbp)
jl     1408 <main+0x2a8>
mov    $0x0,%al
call   1080 <fork@plt>
cmp    $0x0,%rax
jne    13dd <main+0x27d>
mov    $0x0,%al
call   1030 <getpid@plt>
mov    %eax,%esi
xor    %edx,%edx
sub    -0x18(%rbp),%edx
lea    0xc58(%rip),%rdi
call   1040 <printf@plt>
jmp    13f5 <main+0x295>
mov    $0x0,%al
call   1030 <getpid@plt>
mov    %eax,%esi
mov    -0x18(%rbp),%edx
lea    0xc3b(%rip),%rdi
call   1040 <printf@plt>
jmp    13fa <main+0x29a>
mov    -0x18(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0x18(%rbp)
jmp    13a3 <main+0x243>
jmp    140d <main+0x2ad>
jmp    1412 <main+0x2b2>
jmp    1417 <main+0x2b7>
jmp    141c <main+0x2bc>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x1,%edi
jle    1327 <main+0x1c7>
mov    0x8(%rsi),%rax
mov    (%rax),%al
add    $0x9f,%al
cmp    $0x3,%al
ja     1323 <main+0x1c3>
movzbl %al,%eax
lea    0xe7c(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
xor    %eax,%eax
call   1060 <getppid@plt>
mov    %eax,%ebx
xor    %eax,%eax
call   1030 <getpid@plt>
lea    0xe83(%rip),%rdi
mov    %ebx,%esi
mov    %eax,%edx
call   1040 <printf@plt>
xor    %eax,%eax
call   1080 <fork@plt>
test   %rax,%rax
jne    11d3 <main+0x73>
xor    %eax,%eax
call   1030 <getpid@plt>
lea    0xe74(%rip),%rdi
mov    %eax,%esi
mov    $0x1,%edx
call   1040 <printf@plt>
xor    %eax,%eax
call   1080 <fork@plt>
mov    $0x3,%ebx
test   %rax,%rax
jne    130c <main+0x1ac>
jmp    1245 <main+0xe5>
xor    %eax,%eax
call   1060 <getppid@plt>
mov    %eax,%ebx
xor    %eax,%eax
call   1030 <getpid@plt>
lea    0xe26(%rip),%rdi
mov    %ebx,%esi
mov    %eax,%edx
call   1040 <printf@plt>
xor    %eax,%eax
call   1080 <fork@plt>
test   %rax,%rax
je     1230 <main+0xd0>
xor    %eax,%eax
call   1030 <getpid@plt>
lea    0xe17(%rip),%rdi
mov    %eax,%esi
mov    $0x3,%edx
call   1040 <printf@plt>
xor    %eax,%eax
call   1080 <fork@plt>
mov    $0x1,%ebx
test   %rax,%rax
je     130c <main+0x1ac>
xor    %eax,%eax
call   1030 <getpid@plt>
lea    0xde8(%rip),%rdi
mov    %eax,%esi
mov    $0x2,%edx
call   1040 <printf@plt>
jmp    130c <main+0x1ac>
xor    %eax,%eax
call   1060 <getppid@plt>
mov    %eax,%ebx
xor    %eax,%eax
call   1030 <getpid@plt>
lea    0xdac(%rip),%rdi
mov    %ebx,%esi
mov    %eax,%edx
call   1040 <printf@plt>
xor    %eax,%eax
call   1080 <fork@plt>
test   %rax,%rax
je     1297 <main+0x137>
xor    %eax,%eax
call   1080 <fork@plt>
xor    %eax,%eax
call   1080 <fork@plt>
mov    $0x2,%ebx
test   %rax,%rax
je     130c <main+0x1ac>
xor    %eax,%eax
call   1080 <fork@plt>
jmp    130c <main+0x1ac>
xor    %eax,%eax
call   1060 <getppid@plt>
mov    %eax,%ebx
xor    %eax,%eax
call   1030 <getpid@plt>
lea    0xd5f(%rip),%rdi
mov    %ebx,%esi
mov    %eax,%edx
call   1040 <printf@plt>
xor    %eax,%eax
call   1080 <fork@plt>
xor    %ebx,%ebx
test   %rax,%rax
setne  %bl
xor    %eax,%eax
call   1030 <getpid@plt>
lea    -0x2(,%rbx,4),%edx
lea    0xd46(%rip),%rdi
mov    %eax,%esi
call   1040 <printf@plt>
xor    %eax,%eax
call   1080 <fork@plt>
cmp    $0x1,%rax
sbb    %ebx,%ebx
or     $0x1,%ebx
xor    %eax,%eax
call   1030 <getpid@plt>
lea    0xd21(%rip),%rdi
mov    %eax,%esi
mov    %ebx,%edx
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret
mov    0x2cb2(%rip),%rax
mov    (%rax),%edi
mov    (%rsi),%rdx
lea    0xcd6(%rip),%rsi
call   1050 <fprintf@plt>
mov    $0x1,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@stdout = global i32 0
@.str = [23 x i8] c"Usage: %s <character>\0A\00"
@.str.1 = [20 x i8] c"Shell:%d, This: %d\0A\00"
@.str.2 = [17 x i8] c"Process #%d: %d\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i8
%7 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i32, i32* %4
%9 = icmp slt i32 %8, 2
br i1 %9, label %10, label %17
10: ; preds = %2
%11 = load i32, i32* @stdout
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i64 0
%14 = load i8*, i8** %13
%15 = call i32 @fprintf(i32 %11, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i64 0, i64 0), i8* %14)
%16 = call i32 @exit(i32 1)
unreachable
17: ; preds = %2
%18 = load i8**, i8*** %5
%19 = getelementptr inbounds i8*, i8** %18, i64 1
%20 = load i8*, i8** %19
%21 = getelementptr inbounds i8, i8* %20, i64 0
%22 = load i8, i8* %21
store i8 %22, i8* %6
%23 = load i8, i8* %6
%24 = sext i8 %23 to i32
%25 = icmp eq i32 %24, 97
br i1 %25, label %26, label %48
26: ; preds = %17
%27 = call i32 (...) @getppid()
%28 = call i32 (...) @getpid()
%29 = call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 %27, i32 %28)
store i32 1, i32* %7
br label %30
30: ; preds = %41, %26
%31 = load i32, i32* %7
%32 = icmp sle i32 %31, 2
br i1 %32, label %33, label %44
33: ; preds = %30
%34 = call i64 (...) @fork()
%35 = icmp ne i64 %34, 0
br i1 %35, label %40, label %36
36: ; preds = %33
%37 = call i32 (...) @getpid()
%38 = load i32, i32* %7
%39 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %37, i32 %38)
br label %40
40: ; preds = %36, %33
br label %41
41: ; preds = %40
%42 = load i32, i32* %7
%43 = add nsw i32 %42, 1
store i32 %43, i32* %7
br label %30
44: ; preds = %30
%45 = call i32 (...) @getpid()
%46 = load i32, i32* %7
%47 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %45, i32 %46)
br label %129
48: ; preds = %17
%49 = load i8, i8* %6
%50 = sext i8 %49 to i32
%51 = icmp eq i32 %50, 98
br i1 %51, label %52, label %74
52: ; preds = %48
%53 = call i32 (...) @getppid()
%54 = call i32 (...) @getpid()
%55 = call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 %53, i32 %54)
store i32 3, i32* %7
br label %56
56: ; preds = %67, %52
%57 = load i32, i32* %7
%58 = icmp sgt i32 %57, 1
br i1 %58, label %59, label %70
59: ; preds = %56
%60 = call i64 (...) @fork()
%61 = icmp ne i64 %60, 0
br i1 %61, label %62, label %66
62: ; preds = %59
%63 = call i32 (...) @getpid()
%64 = load i32, i32* %7
%65 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %63, i32 %64)
br label %66
66: ; preds = %62, %59
br label %67
67: ; preds = %66
%68 = load i32, i32* %7
%69 = add nsw i32 %68, -1
store i32 %69, i32* %7
br label %56
70: ; preds = %56
%71 = call i32 (...) @getpid()
%72 = load i32, i32* %7
%73 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %71, i32 %72)
br label %128
74: ; preds = %48
%75 = load i8, i8* %6
%76 = sext i8 %75 to i32
%77 = icmp eq i32 %76, 99
br i1 %77, label %78, label %98
78: ; preds = %74
%79 = call i32 (...) @getppid()
%80 = call i32 (...) @getpid()
%81 = call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 %79, i32 %80)
store i32 0, i32* %7
br label %82
82: ; preds = %91, %78
%83 = load i32, i32* %7
%84 = icmp slt i32 %83, 2
br i1 %84, label %85, label %94
85: ; preds = %82
%86 = call i64 (...) @fork()
%87 = icmp ne i64 %86, 0
br i1 %87, label %88, label %90
88: ; preds = %85
%89 = call i64 (...) @fork()
br label %90
90: ; preds = %88, %85
br label %91
91: ; preds = %90
%92 = load i32, i32* %7
%93 = add nsw i32 %92, 1
store i32 %93, i32* %7
br label %82
94: ; preds = %82
%95 = call i32 (...) @getpid()
%96 = load i32, i32* %7
%97 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %95, i32 %96)
br label %127
98: ; preds = %74
%99 = load i8, i8* %6
%100 = sext i8 %99 to i32
%101 = icmp eq i32 %100, 100
br i1 %101, label %102, label %126
102: ; preds = %98
%103 = call i32 (...) @getppid()
%104 = call i32 (...) @getpid()
%105 = call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 %103, i32 %104)
store i32 2, i32* %7
br label %106
106: ; preds = %122, %102
%107 = load i32, i32* %7
%108 = icmp sge i32 %107, 1
br i1 %108, label %109, label %125
109: ; preds = %106
%110 = call i64 (...) @fork()
%111 = icmp ne i64 %110, 0
br i1 %111, label %117, label %112
112: ; preds = %109
%113 = call i32 (...) @getpid()
%114 = load i32, i32* %7
%115 = sub nsw i32 0, %114
%116 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %113, i32 %115)
br label %121
117: ; preds = %109
%118 = call i32 (...) @getpid()
%119 = load i32, i32* %7
%120 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %118, i32 %119)
br label %121
121: ; preds = %117, %112
br label %122
122: ; preds = %121
%123 = load i32, i32* %7
%124 = add nsw i32 %123, -1
store i32 %124, i32* %7
br label %106
125: ; preds = %106
br label %126
126: ; preds = %125, %98
br label %127
127: ; preds = %126, %94
br label %128
128: ; preds = %127, %70
br label %129
129: ; preds = %128, %44
ret i32 0
}

LLVM IR (-O2):
@stdout = global i32 0
@.str = [23 x i8] c"Usage: %s <character>\0A\00"
@.str.1 = [20 x i8] c"Shell:%d, This: %d\0A\00"
@.str.2 = [17 x i8] c"Process #%d: %d\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %4, label %9
4: ; preds = %2
%5 = load i32, i32* @stdout
%6 = load i8*, i8** %1
%7 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i64 0, i64 0), i8* %6)
%8 = tail call i32 @exit(i32 1)
unreachable
9: ; preds = %2
%10 = getelementptr inbounds i8*, i8** %1, i64 1
%11 = load i8*, i8** %10
%12 = load i8, i8* %11
switch i8 %12, label %72 [
i8 97, label %13
i8 98, label %28
i8 99, label %43
i8 100, label %56
]
13: ; preds = %9
%14 = tail call i32 (...) @getppid()
%15 = tail call i32 (...) @getpid()
%16 = tail call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 %14, i32 %15)
%17 = tail call i64 (...) @fork()
%18 = icmp eq i64 %17, 0
br i1 %18, label %19, label %22
19: ; preds = %13
%20 = tail call i32 (...) @getpid()
%21 = tail call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %20, i32 1)
br label %22
22: ; preds = %13, %19
%23 = tail call i64 (...) @fork()
%24 = icmp eq i64 %23, 0
br i1 %24, label %25, label %68
25: ; preds = %22
%26 = tail call i32 (...) @getpid()
%27 = tail call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %26, i32 2)
br label %68
28: ; preds = %9
%29 = tail call i32 (...) @getppid()
%30 = tail call i32 (...) @getpid()
%31 = tail call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 %29, i32 %30)
%32 = tail call i64 (...) @fork()
%33 = icmp eq i64 %32, 0
br i1 %33, label %37, label %34
34: ; preds = %28
%35 = tail call i32 (...) @getpid()
%36 = tail call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %35, i32 3)
br label %37
37: ; preds = %28, %34
%38 = tail call i64 (...) @fork()
%39 = icmp eq i64 %38, 0
br i1 %39, label %68, label %40
40: ; preds = %37
%41 = tail call i32 (...) @getpid()
%42 = tail call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %41, i32 2)
br label %68
43: ; preds = %9
%44 = tail call i32 (...) @getppid()
%45 = tail call i32 (...) @getpid()
%46 = tail call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 %44, i32 %45)
%47 = tail call i64 (...) @fork()
%48 = icmp eq i64 %47, 0
br i1 %48, label %51, label %49
49: ; preds = %43
%50 = tail call i64 (...) @fork()
br label %51
51: ; preds = %43, %49
%52 = tail call i64 (...) @fork()
%53 = icmp eq i64 %52, 0
br i1 %53, label %68, label %54
54: ; preds = %51
%55 = tail call i64 (...) @fork()
br label %68
56: ; preds = %9
%57 = tail call i32 (...) @getppid()
%58 = tail call i32 (...) @getpid()
%59 = tail call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0), i32 %57, i32 %58)
%60 = tail call i64 (...) @fork()
%61 = icmp eq i64 %60, 0
%62 = tail call i32 (...) @getpid()
%63 = select i1 %61, i32 -2, i32 2
%64 = tail call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %62, i32 %63)
%65 = tail call i64 (...) @fork()
%66 = icmp eq i64 %65, 0
%67 = select i1 %66, i32 -1, i32 1
br label %68
68: ; preds = %56, %51, %54, %37, %40, %22, %25
%69 = phi i32 [ 3, %25 ], [ 3, %22 ], [ 1, %40 ], [ 1, %37 ], [ 2, %54 ], [ 2, %51 ], [ %67, %56 ]
%70 = tail call i32 (...) @getpid()
%71 = tail call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.2, i64 0, i64 0), i32 %70, i32 %69)
br label %72
72: ; preds = %68, %9
ret i32 0
}