#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_FAILURE;
int /*<<< orphan*/ O_RDWR;
int /*<<< orphan*/ errno;
int /*<<< orphan*/ exit(int /*<<< orphan*/);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char const *, char *);
int open(char const *, int /*<<< orphan*/);
int /*<<< orphan*/ stderr;
char *strerror(int /*<<< orphan*/);
int ReOpenFileWriteable(const char *filename) {
  int fd;
  fd = open(filename, O_RDWR);
  if (fd < 0) {
    fprintf(stderr, "Cannot open file '%s' for reading and writing [%s].\n",
            filename, strerror(errno));
    exit(EXIT_FAILURE);
  }
  return (fd);
}


x86 assembly (clang, -O0):
<ReOpenFileWriteable>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
mov    0x2e91(%rip),%rax
mov    (%rax),%esi
call   1040 <open@plt>
mov    %eax,-0xc(%rbp)
cmpl   $0x0,-0xc(%rbp)
jge    11b1 <ReOpenFileWriteable+0x71>
mov    0x2e66(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x1c(%rbp)
mov    -0x8(%rbp),%rax
mov    %rax,-0x18(%rbp)
mov    0x2e4a(%rip),%rax
mov    (%rax),%edi
call   1060 <strerror@plt>
mov    -0x1c(%rbp),%edi
mov    -0x18(%rbp),%rdx
mov    %rax,%rcx
lea    0xe62(%rip),%rsi
call   1030 <fprintf@plt>
mov    0x2e1e(%rip),%rax
mov    (%rax),%edi
call   1050 <exit@plt>
mov    -0xc(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<ReOpenFileWriteable>:
push   %rbp
push   %rbx
push   %rax
mov    %rdi,%rbx
mov    0x2e9b(%rip),%rax
mov    (%rax),%esi
call   1040 <open@plt>
test   %eax,%eax
js     115f <ReOpenFileWriteable+0x1f>
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret
mov    0x2e72(%rip),%rax
mov    (%rax),%ebp
mov    0x2e61(%rip),%rax
mov    (%rax),%edi
call   1060 <strerror@plt>
lea    0xe83(%rip),%rsi
mov    %ebp,%edi
mov    %rbx,%rdx
mov    %rax,%rcx
call   1030 <fprintf@plt>
mov    0x2e37(%rip),%rax
mov    (%rax),%edi
call   1050 <exit@plt>

LLVM IR (-O0):
@O_RDWR = global i32 0
@stderr = global i32 0
@.str = [53 x i8] c"Cannot open file '%s' for reading and writing [%s].\0A\00"
@errno = global i32 0
@EXIT_FAILURE = global i32 0
define i32 @ReOpenFileWriteable(i8* %0) {
%2 = alloca i8*
%3 = alloca i32
store i8* %0, i8** %2
%4 = load i8*, i8** %2
%5 = load i32, i32* @O_RDWR
%6 = call i32 @open(i8* %4, i32 %5)
store i32 %6, i32* %3
%7 = load i32, i32* %3
%8 = icmp slt i32 %7, 0
br i1 %8, label %9, label %17
9: ; preds = %1
%10 = load i32, i32* @stderr
%11 = load i8*, i8** %2
%12 = load i32, i32* @errno
%13 = call i8* @strerror(i32 %12)
%14 = call i32 @fprintf(i32 %10, i8* getelementptr inbounds ([53 x i8], [53 x i8]* @.str, i64 0, i64 0), i8* %11, i8* %13)
%15 = load i32, i32* @EXIT_FAILURE
%16 = call i32 @exit(i32 %15)
unreachable
17: ; preds = %1
%18 = load i32, i32* %3
ret i32 %18
}

LLVM IR (-O2):
@O_RDWR = global i32 0
@stderr = global i32 0
@.str = [53 x i8] c"Cannot open file '%s' for reading and writing [%s].\0A\00"
@errno = global i32 0
@EXIT_FAILURE = global i32 0
define i32 @ReOpenFileWriteable(i8* %0) {
%2 = load i32, i32* @O_RDWR
%3 = tail call i32 @open(i8* %0, i32 %2)
%4 = icmp slt i32 %3, 0
br i1 %4, label %5, label %12
5: ; preds = %1
%6 = load i32, i32* @stderr
%7 = load i32, i32* @errno
%8 = tail call i8* @strerror(i32 %7)
%9 = tail call i32 @fprintf(i32 %6, i8* getelementptr inbounds ([53 x i8], [53 x i8]* @.str, i64 0, i64 0), i8* %0, i8* %8)
%10 = load i32, i32* @EXIT_FAILURE
%11 = tail call i32 @exit(i32 %10)
unreachable
12: ; preds = %1
ret i32 %3
}