#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 const *, char const *);
scalar_t__ strcmp(char const *, char *);
int check_file(char const *filename, char const *mode) {
  FILE *fp;
  int got_file;
  if (strcmp(mode, "x") == 0) {
    mode = "r";
  }
  fp = fopen(filename, mode);
  got_file = (fp != 0);
  if (fp != 0) {
    (void)fclose(fp);
  }
  return got_file;
}


x86 assembly (clang, -O0):
<check_file>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xeb5(%rip),%rsi
call   1040 <strcmp@plt>
cmp    $0x0,%rax
jne    1165 <check_file+0x35>
lea    0xea1(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x8(%rbp),%rdi
mov    -0x10(%rbp),%rsi
call   1050 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
setne  %al
and    $0x1,%al
movzbl %al,%eax
mov    %eax,-0x1c(%rbp)
cmpq   $0x0,-0x18(%rbp)
je     119a <check_file+0x6a>
mov    -0x18(%rbp),%rdi
call   1030 <fclose@plt>
mov    -0x1c(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<check_file>:
push   %r14
push   %rbx
push   %rax
mov    %rsi,%rbx
mov    %rdi,%r14
lea    0xebf(%rip),%rsi
mov    %rbx,%rdi
call   1040 <strcmp@plt>
test   %rax,%rax
lea    0xeaf(%rip),%rsi
cmovne %rbx,%rsi
mov    %r14,%rdi
call   1050 <fopen@plt>
mov    %rax,%rbx
test   %rax,%rax
je     116f <check_file+0x3f>
mov    %rbx,%rdi
call   1030 <fclose@plt>
xor    %eax,%eax
test   %rbx,%rbx
setne  %al
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [2 x i8] c"x\00"
@.str.1 = [2 x i8] c"r\00"
define i32 @check_file(i8* %0, i8* %1) {
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i32*
%6 = alloca i32
store i8* %0, i8** %3
store i8* %1, i8** %4
%7 = load i8*, i8** %4
%8 = call i64 @strcmp(i8* %7, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%9 = icmp eq i64 %8, 0
br i1 %9, label %10, label %11
10: ; preds = %2
store i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i8** %4
br label %11
11: ; preds = %10, %2
%12 = load i8*, i8** %3
%13 = load i8*, i8** %4
%14 = call i32* @fopen(i8* %12, i8* %13)
store i32* %14, i32** %5
%15 = load i32*, i32** %5
%16 = icmp ne i32* %15, null
%17 = zext i1 %16 to i32
store i32 %17, i32* %6
%18 = load i32*, i32** %5
%19 = icmp ne i32* %18, null
br i1 %19, label %20, label %23
20: ; preds = %11
%21 = load i32*, i32** %5
%22 = call i32 @fclose(i32* %21)
br label %23
23: ; preds = %20, %11
%24 = load i32, i32* %6
ret i32 %24
}

LLVM IR (-O2):
@.str = [2 x i8] c"x\00"
@.str.1 = [2 x i8] c"r\00"
define i32 @check_file(i8* nocapture %0, i8* %1) {
%3 = tail call i64 @strcmp(i8* %1, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%4 = icmp eq i64 %3, 0
%5 = select i1 %4, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i8* %1
%6 = tail call i32* @fopen(i8* %0, i8* %5)
%7 = icmp ne i32* %6, null
br i1 %7, label %8, label %10
8: ; preds = %2
%9 = tail call i32 @fclose(i32* %6)
br label %10
10: ; preds = %8, %2
%11 = zext i1 %7 to i32
ret i32 %11
}