#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 */
typedef int /*<<< orphan*/ FILE;

/* Variables and functions */
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/ *, char *, char *);
void initializeStuFile(char *name, char *stuId) {
  FILE *stuFile = fopen(name, "r");
  if (stuFile == NULL) {
    stuFile = fopen(name, "w");
    fprintf(stuFile, "%s 0\n", stuId);
  }
  fclose(stuFile);
  return;
}


x86 assembly (clang, -O0):
<initializeStuFile>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xeb5(%rip),%rsi
call   1050 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
jne    1187 <initializeStuFile+0x57>
mov    -0x8(%rbp),%rdi
lea    0xe98(%rip),%rsi
call   1050 <fopen@plt>
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rdi
mov    -0x10(%rbp),%rdx
lea    0xe82(%rip),%rsi
call   1040 <fprintf@plt>
mov    -0x18(%rbp),%rdi
call   1030 <fclose@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<initializeStuFile>:
push   %r15
push   %r14
push   %rbx
mov    %rsi,%r14
mov    %rdi,%r15
lea    0xebe(%rip),%rsi
call   1050 <fopen@plt>
mov    %rax,%rbx
test   %rax,%rax
jne    1173 <initializeStuFile+0x43>
lea    0xeac(%rip),%rsi
mov    %r15,%rdi
call   1050 <fopen@plt>
mov    %rax,%rbx
lea    0xe9c(%rip),%rsi
mov    %rax,%rdi
mov    %r14,%rdx
call   1040 <fprintf@plt>
mov    %rbx,%rdi
pop    %rbx
pop    %r14
pop    %r15
jmp    1030 <fclose@plt>

LLVM IR (-O0):
@.str = [2 x i8] c"r\00"
@.str.1 = [2 x i8] c"w\00"
@.str.2 = [6 x i8] c"%s 0\0A\00"
define void @initializeStuFile(i8* %0, i8* %1) {
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i32*
store i8* %0, i8** %3
store i8* %1, i8** %4
%6 = load i8*, i8** %3
%7 = call i32* @fopen(i8* %6, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %7, i32** %5
%8 = load i32*, i32** %5
%9 = icmp eq i32* %8, null
br i1 %9, label %10, label %16
10: ; preds = %2
%11 = load i8*, i8** %3
%12 = call i32* @fopen(i8* %11, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
store i32* %12, i32** %5
%13 = load i32*, i32** %5
%14 = load i8*, i8** %4
%15 = call i32 @fprintf(i32* %13, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i8* %14)
br label %16
16: ; preds = %10, %2
%17 = load i32*, i32** %5
%18 = call i32 @fclose(i32* %17)
ret void
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@.str.1 = [2 x i8] c"w\00"
@.str.2 = [6 x i8] c"%s 0\0A\00"
define void @initializeStuFile(i8* nocapture %0, i8* %1) {
%3 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%4 = icmp eq i32* %3, null
br i1 %4, label %5, label %8
5: ; preds = %2
%6 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%7 = tail call i32 @fprintf(i32* %6, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i8* %1)
br label %8
8: ; preds = %5, %2
%9 = phi i32* [ %6, %5 ], [ %3, %2 ]
%10 = tail call i32 @fclose(i32* %9)
ret void
}