#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*/ SEEK_END;
int /*<<< orphan*/ SEEK_SET;
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fread(char *, size_t, int, int /*<<< orphan*/ *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
size_t ftell(int /*<<< orphan*/ *);
scalar_t__ malloc(size_t);
char *read_entire_file_null_terminate(char *file_path_and_name) {
  char *result = 0;
  FILE *file = fopen(file_path_and_name, "r");
  if (file) {
    fseek(file, 0, SEEK_END);
    size_t file_size = ftell(file);
    fseek(file, 0, SEEK_SET);
    if (file_size > 0) {
      result = (char *)malloc(file_size + 1);
      fread(result, file_size, 1, file);
      result[file_size] = 0;
    }
    fclose(file);
  }
  return (result);
}


x86 assembly (clang, -O0):
<read_entire_file_null_terminate>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
movq   $0x0,-0x10(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xe81(%rip),%rsi
call   1080 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
je     120f <read_entire_file_null_terminate+0xaf>
mov    -0x18(%rbp),%rdi
mov    0x2e4a(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
mov    -0x18(%rbp),%rdi
call   1050 <ftell@plt>
mov    %rax,-0x20(%rbp)
mov    -0x18(%rbp),%rdi
mov    0x2e19(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
cmpq   $0x0,-0x20(%rbp)
jbe    1206 <read_entire_file_null_terminate+0xa6>
mov    -0x20(%rbp),%rdi
add    $0x1,%rdi
call   1060 <malloc@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
mov    -0x20(%rbp),%rsi
mov    -0x18(%rbp),%rcx
mov    $0x1,%edx
call   1030 <fread@plt>
mov    -0x10(%rbp),%rax
mov    -0x20(%rbp),%rcx
movb   $0x0,(%rax,%rcx,1)
mov    -0x18(%rbp),%rdi
call   1040 <fclose@plt>
mov    -0x10(%rbp),%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<read_entire_file_null_terminate>:
push   %r15
push   %r14
push   %rbx
lea    0xe94(%rip),%rsi
call   1080 <fopen@plt>
test   %rax,%rax
je     11e3 <read_entire_file_null_terminate+0x83>
mov    %rax,%rbx
mov    0x2e68(%rip),%rax
mov    (%rax),%edx
xor    %r14d,%r14d
mov    %rbx,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
mov    %rbx,%rdi
call   1050 <ftell@plt>
mov    %rax,%r15
mov    0x2e37(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
test   %r15,%r15
je     11d9 <read_entire_file_null_terminate+0x79>
mov    %r15,%rdi
add    $0x1,%rdi
call   1060 <malloc@plt>
mov    %rax,%r14
mov    %rax,%rdi
mov    %r15,%rsi
mov    $0x1,%edx
mov    %rbx,%rcx
call   1030 <fread@plt>
movb   $0x0,(%r14,%r15,1)
mov    %rbx,%rdi
call   1040 <fclose@plt>
jmp    11e6 <read_entire_file_null_terminate+0x86>
xor    %r14d,%r14d
mov    %r14,%rax
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [2 x i8] c"r\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
define i8* @read_entire_file_null_terminate(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i32*
%5 = alloca i64
store i8* %0, i8** %2
store i8* null, i8** %3
%6 = load i8*, i8** %2
%7 = call i32* @fopen(i8* %6, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %7, i32** %4
%8 = load i32*, i32** %4
%9 = icmp ne i32* %8, null
br i1 %9, label %10, label %36
10: ; preds = %1
%11 = load i32*, i32** %4
%12 = load i32, i32* @SEEK_END
%13 = call i32 @fseek(i32* %11, i32 0, i32 %12)
%14 = load i32*, i32** %4
%15 = call i64 @ftell(i32* %14)
store i64 %15, i64* %5
%16 = load i32*, i32** %4
%17 = load i32, i32* @SEEK_SET
%18 = call i32 @fseek(i32* %16, i32 0, i32 %17)
%19 = load i64, i64* %5
%20 = icmp ugt i64 %19, 0
br i1 %20, label %21, label %33
21: ; preds = %10
%22 = load i64, i64* %5
%23 = add i64 %22, 1
%24 = call i64 @malloc(i64 %23)
%25 = inttoptr i64 %24 to i8*
store i8* %25, i8** %3
%26 = load i8*, i8** %3
%27 = load i64, i64* %5
%28 = load i32*, i32** %4
%29 = call i32 @fread(i8* %26, i64 %27, i32 1, i32* %28)
%30 = load i8*, i8** %3
%31 = load i64, i64* %5
%32 = getelementptr inbounds i8, i8* %30, i64 %31
store i8 0, i8* %32
br label %33
33: ; preds = %21, %10
%34 = load i32*, i32** %4
%35 = call i32 @fclose(i32* %34)
br label %36
36: ; preds = %33, %1
%37 = load i8*, i8** %3
ret i8* %37
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
define i8* @read_entire_file_null_terminate(i8* nocapture %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 %20, label %4
4: ; preds = %1
%5 = load i32, i32* @SEEK_END
%6 = tail call i32 @fseek(i32* %2, i32 0, i32 %5)
%7 = tail call i64 @ftell(i32* %2)
%8 = load i32, i32* @SEEK_SET
%9 = tail call i32 @fseek(i32* %2, i32 0, i32 %8)
%10 = icmp eq i64 %7, 0
br i1 %10, label %17, label %11
11: ; preds = %4
%12 = add i64 %7, 1
%13 = tail call i64 @malloc(i64 %12)
%14 = inttoptr i64 %13 to i8*
%15 = tail call i32 @fread(i8* %14, i64 %7, i32 1, i32* %2)
%16 = getelementptr inbounds i8, i8* %14, i64 %7
store i8 0, i8* %16
br label %17
17: ; preds = %11, %4
%18 = phi i8* [ %14, %11 ], [ null, %4 ]
%19 = tail call i32 @fclose(i32* %2)
br label %20
20: ; preds = %17, %1
%21 = phi i8* [ %18, %17 ], [ null, %1 ]
ret i8* %21
}