#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 const *, char *);
int /*<<< orphan*/ fread(char *, long, int, int /*<<< orphan*/ *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
long ftell(int /*<<< orphan*/ *);
char *malloc(long);
char *LoadFile(const char *path) {
  FILE *f = fopen(path, "r");
  if (!f)
    return NULL;
  fseek(f, 0, SEEK_END);
  long len = ftell(f);
  fseek(f, 0, SEEK_SET);
  char *r = malloc(len + 1);
  if (r) {
    fread(r, len, 1, f);
    r[len] = '\0';
  }
  fclose(f);
  return r;
}


x86 assembly (clang, -O0):
<LoadFile>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe89(%rip),%rsi
call   1080 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
jne    1198 <LoadFile+0x38>
movq   $0x0,-0x8(%rbp)
jmp    121c <LoadFile+0xbc>
mov    -0x18(%rbp),%rdi
mov    0x2e45(%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    0x2e14(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
mov    -0x20(%rbp),%rdi
add    $0x1,%rdi
call   1060 <malloc@plt>
mov    %rax,-0x28(%rbp)
cmpq   $0x0,-0x28(%rbp)
je     120b <LoadFile+0xab>
mov    -0x28(%rbp),%rdi
mov    -0x20(%rbp),%rsi
mov    -0x18(%rbp),%rcx
mov    $0x1,%edx
call   1030 <fread@plt>
mov    -0x28(%rbp),%rax
mov    -0x20(%rbp),%rcx
movb   $0x0,(%rax,%rcx,1)
mov    -0x18(%rbp),%rdi
call   1040 <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    0xe94(%rip),%rsi
call   1080 <fopen@plt>
test   %rax,%rax
je     11dd <LoadFile+0x7d>
mov    %rax,%rbx
mov    0x2e68(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
mov    %rbx,%rdi
call   1050 <ftell@plt>
mov    %rax,%r14
mov    0x2e3a(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
lea    0x1(%r14),%rdi
call   1060 <malloc@plt>
mov    %rax,%r15
test   %rax,%rax
je     11d3 <LoadFile+0x73>
mov    %r15,%rdi
mov    %r14,%rsi
mov    $0x1,%edx
mov    %rbx,%rcx
call   1030 <fread@plt>
movb   $0x0,(%r15,%r14,1)
mov    %rbx,%rdi
call   1040 <fclose@plt>
jmp    11e0 <LoadFile+0x80>
xor    %r15d,%r15d
mov    %r15,%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* @LoadFile(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i32*
%5 = alloca i64
%6 = alloca i8*
store i8* %0, i8** %3
%7 = load i8*, i8** %3
%8 = call i32* @fopen(i8* %7, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %8, i32** %4
%9 = load i32*, i32** %4
%10 = icmp ne i32* %9, null
br i1 %10, label %12, label %11
11: ; preds = %1
store i8* null, i8** %2
br label %38
12: ; preds = %1
%13 = load i32*, i32** %4
%14 = load i32, i32* @SEEK_END
%15 = call i32 @fseek(i32* %13, i32 0, i32 %14)
%16 = load i32*, i32** %4
%17 = call i64 @ftell(i32* %16)
store i64 %17, i64* %5
%18 = load i32*, i32** %4
%19 = load i32, i32* @SEEK_SET
%20 = call i32 @fseek(i32* %18, i32 0, i32 %19)
%21 = load i64, i64* %5
%22 = add nsw i64 %21, 1
%23 = call i8* @malloc(i64 %22)
store i8* %23, i8** %6
%24 = load i8*, i8** %6
%25 = icmp ne i8* %24, null
br i1 %25, label %26, label %34
26: ; preds = %12
%27 = load i8*, i8** %6
%28 = load i64, i64* %5
%29 = load i32*, i32** %4
%30 = call i32 @fread(i8* %27, i64 %28, i32 1, i32* %29)
%31 = load i8*, i8** %6
%32 = load i64, i64* %5
%33 = getelementptr inbounds i8, i8* %31, i64 %32
store i8 0, i8* %33
br label %34
34: ; preds = %26, %12
%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, %11
%39 = load i8*, i8** %2
ret i8* %39
}

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