#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 EXIT_FAILURE;
int EXIT_SUCCESS;
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char const *, char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char const *);
int /*<<< orphan*/ stderr;
int check_if_file_exists(const char *outfile) {
  FILE *fp = fopen(outfile, "r");
  if (fp != NULL) {
    fprintf(stderr,
            "Error: Expected output file = `%s' to not exist. Aborting in case "
            "there is some error (and avoiding )"
            "valuable snapshots getting accidentally overwritten)\n",
            outfile);
    fclose(fp);
    return EXIT_FAILURE;
  }
  return EXIT_SUCCESS;
}


x86 assembly (clang, -O0):
<check_if_file_exists>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xeb9(%rip),%rsi
call   1050 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
je     118e <check_if_file_exists+0x5e>
mov    0x2e7e(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rdx
lea    0xe93(%rip),%rsi
call   1040 <fprintf@plt>
mov    -0x18(%rbp),%rdi
call   1030 <fclose@plt>
mov    0x2e54(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
jmp    119a <check_if_file_exists+0x6a>
mov    0x2e3b(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<check_if_file_exists>:
push   %r14
push   %rbx
push   %rax
mov    %rdi,%r14
lea    0xec2(%rip),%rsi
call   1050 <fopen@plt>
test   %rax,%rax
je     1174 <check_if_file_exists+0x44>
mov    %rax,%rbx
mov    0x2e8e(%rip),%rax
mov    (%rax),%edi
lea    0xea7(%rip),%rsi
mov    %r14,%rdx
call   1040 <fprintf@plt>
mov    %rbx,%rdi
call   1030 <fclose@plt>
mov    0x2e66(%rip),%rax
jmp    117b <check_if_file_exists+0x4b>
mov    0x2e55(%rip),%rax
mov    (%rax),%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [2 x i8] c"r\00"
@stderr = global i32 0
@.str.1 = [155 x i8] c"Error: Expected output file = `%s' to not exist. Aborting in case there is some error (and avoiding )valuable snapshots getting accidentally overwritten)\0A\00"
@EXIT_FAILURE = global i32 0
@EXIT_SUCCESS = global i32 0
define i32 @check_if_file_exists(i8* %0) {
%2 = alloca i32
%3 = alloca i8*
%4 = alloca i32*
store i8* %0, i8** %3
%5 = load i8*, i8** %3
%6 = call i32* @fopen(i8* %5, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %6, i32** %4
%7 = load i32*, i32** %4
%8 = icmp ne i32* %7, null
br i1 %8, label %9, label %16
9: ; preds = %1
%10 = load i32, i32* @stderr
%11 = load i8*, i8** %3
%12 = call i32 @fprintf(i32 %10, i8* getelementptr inbounds ([155 x i8], [155 x i8]* @.str.1, i64 0, i64 0), i8* %11)
%13 = load i32*, i32** %4
%14 = call i32 @fclose(i32* %13)
%15 = load i32, i32* @EXIT_FAILURE
store i32 %15, i32* %2
br label %18
16: ; preds = %1
%17 = load i32, i32* @EXIT_SUCCESS
store i32 %17, i32* %2
br label %18
18: ; preds = %16, %9
%19 = load i32, i32* %2
ret i32 %19
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@stderr = global i32 0
@.str.1 = [155 x i8] c"Error: Expected output file = `%s' to not exist. Aborting in case there is some error (and avoiding )valuable snapshots getting accidentally overwritten)\0A\00"
@EXIT_FAILURE = global i32 0
@EXIT_SUCCESS = global i32 0
define i32 @check_if_file_exists(i8* %0) {
%2 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%3 = icmp eq i32* %2, null
br i1 %3, label %8, label %4
4: ; preds = %1
%5 = load i32, i32* @stderr
%6 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([155 x i8], [155 x i8]* @.str.1, i64 0, i64 0), i8* %0)
%7 = tail call i32 @fclose(i32* %2)
br label %8
8: ; preds = %1, %4
%9 = phi i32* [ @EXIT_FAILURE, %4 ], [ @EXIT_SUCCESS, %1 ]
%10 = load i32, i32* %9
ret i32 %10
}