#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*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char const *, char *);
int fread(char *, long, int, int /*<<< orphan*/ *);
int /*<<< orphan*/ free(char *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
long ftell(int /*<<< orphan*/ *);
scalar_t__ malloc(long);
int /*<<< orphan*/ rewind(int /*<<< orphan*/ *);
char *loadFile(const char *fileName) {
  FILE *fp = NULL;
  long size = 0;
  char *buf = NULL;
  if ((fp = fopen(fileName, "rb")) == NULL)
    return NULL;
  fseek(fp, 0, SEEK_END);
  size = ftell(fp);
  rewind(fp);
  buf = (char *)malloc(size + 1);
  buf[size] = '\0';
  if (fread(buf, size, 1, fp) < 1) {
    free(buf);
    buf = NULL;
  }
  fclose(fp);
  return buf;
}


x86 assembly (clang, -O0):
<loadFile>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
movq   $0x0,-0x18(%rbp)
movq   $0x0,-0x20(%rbp)
movq   $0x0,-0x28(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe51(%rip),%rsi
call   10a0 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmp    $0x0,%rax
jne    11cf <loadFile+0x4f>
movq   $0x0,-0x8(%rbp)
jmp    1257 <loadFile+0xd7>
mov    -0x18(%rbp),%rdi
mov    0x2e0e(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1090 <fseek@plt>
mov    -0x18(%rbp),%rdi
call   1070 <ftell@plt>
mov    %rax,-0x20(%rbp)
mov    -0x18(%rbp),%rdi
call   1060 <rewind@plt>
mov    -0x20(%rbp),%rdi
add    $0x1,%rdi
call   1080 <malloc@plt>
mov    %rax,-0x28(%rbp)
mov    -0x28(%rbp),%rax
mov    -0x20(%rbp),%rcx
movb   $0x0,(%rax,%rcx,1)
mov    -0x28(%rbp),%rdi
mov    -0x20(%rbp),%rsi
mov    -0x18(%rbp),%rcx
mov    $0x1,%edx
call   1040 <fread@plt>
cmp    $0x1,%eax
jge    1246 <loadFile+0xc6>
mov    -0x28(%rbp),%rdi
call   1030 <free@plt>
movq   $0x0,-0x28(%rbp)
mov    -0x18(%rbp),%rdi
call   1050 <fclose@plt>
mov    -0x28(%rbp),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<loadFile>:
push   %r15
push   %r14
push   %rbx
lea    0xe74(%rip),%rsi
call   10a0 <fopen@plt>
test   %rax,%rax
je     11fc <loadFile+0x7c>
mov    %rax,%rbx
mov    0x2e48(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1090 <fseek@plt>
mov    %rbx,%rdi
call   1070 <ftell@plt>
mov    %rax,%r15
mov    %rbx,%rdi
call   1060 <rewind@plt>
lea    0x1(%r15),%rdi
call   1080 <malloc@plt>
mov    %rax,%r14
movb   $0x0,(%rax,%r15,1)
mov    %rax,%rdi
mov    %r15,%rsi
mov    $0x1,%edx
mov    %rbx,%rcx
call   1040 <fread@plt>
test   %eax,%eax
jg     11f2 <loadFile+0x72>
mov    %r14,%rdi
call   1030 <free@plt>
xor    %r14d,%r14d
mov    %rbx,%rdi
call   1050 <fclose@plt>
jmp    11ff <loadFile+0x7f>
xor    %r14d,%r14d
mov    %r14,%rax
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [3 x i8] c"rb\00"
@SEEK_END = global i32 0
define i8* @loadFile(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i32*
%5 = alloca i64
%6 = alloca i8*
store i8* %0, i8** %3
store i32* null, i32** %4
store i64 0, i64* %5
store i8* null, i8** %6
%7 = load i8*, i8** %3
%8 = call i32* @fopen(i8* %7, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32* %8, i32** %4
%9 = icmp eq i32* %8, null
br i1 %9, label %10, label %11
10: ; preds = %1
store i8* null, i8** %2
br label %38
11: ; preds = %1
%12 = load i32*, i32** %4
%13 = load i32, i32* @SEEK_END
%14 = call i32 @fseek(i32* %12, i32 0, i32 %13)
%15 = load i32*, i32** %4
%16 = call i64 @ftell(i32* %15)
store i64 %16, i64* %5
%17 = load i32*, i32** %4
%18 = call i32 @rewind(i32* %17)
%19 = load i64, i64* %5
%20 = add nsw i64 %19, 1
%21 = call i64 @malloc(i64 %20)
%22 = inttoptr i64 %21 to i8*
store i8* %22, i8** %6
%23 = load i8*, i8** %6
%24 = load i64, i64* %5
%25 = getelementptr inbounds i8, i8* %23, i64 %24
store i8 0, i8* %25
%26 = load i8*, i8** %6
%27 = load i64, i64* %5
%28 = load i32*, i32** %4
%29 = call i32 @fread(i8* %26, i64 %27, i32 1, i32* %28)
%30 = icmp slt i32 %29, 1
br i1 %30, label %31, label %34
31: ; preds = %11
%32 = load i8*, i8** %6
%33 = call i32 @free(i8* %32)
store i8* null, i8** %6
br label %34
34: ; preds = %31, %11
%35 = load i32*, i32** %4
%36 = call i32 @fclose(i32* %35)
%37 = load i8*, i8** %6
store i8* %37, i8** %2
br label %38
38: ; preds = %34, %10
%39 = load i8*, i8** %2
ret i8* %39
}

LLVM IR (-O2):
@.str = [3 x i8] c"rb\00"
@SEEK_END = global i32 0
define i8* @loadFile(i8* nocapture %0) {
%2 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([3 x i8], [3 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 = tail call i32 @rewind(i32* %2)
%9 = add nsw i64 %7, 1
%10 = tail call i64 @malloc(i64 %9)
%11 = inttoptr i64 %10 to i8*
%12 = getelementptr inbounds i8, i8* %11, i64 %7
store i8 0, i8* %12
%13 = tail call i32 @fread(i8* %11, i64 %7, i32 1, i32* %2)
%14 = icmp slt i32 %13, 1
br i1 %14, label %15, label %17
15: ; preds = %4
%16 = tail call i32 @free(i8* %11)
br label %17
17: ; preds = %15, %4
%18 = phi i8* [ null, %15 ], [ %11, %4 ]
%19 = tail call i32 @fclose(i32* %2)
br label %20
20: ; preds = %1, %17
%21 = phi i8* [ %18, %17 ], [ null, %1 ]
ret i8* %21
}