#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 /*<<< orphan*/ fread(void *, size_t, int, int /*<<< orphan*/ *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
size_t ftell(int /*<<< orphan*/ *);
void *malloc(size_t);
int /*<<< orphan*/ rewind(int /*<<< orphan*/ *);
void *loadfile(const char *filename, size_t *pSize) {
  FILE *pFile;
  pFile = fopen(filename, "rb");
  if (pFile == NULL) {
    *pSize = 0;
    return NULL;
  }
  fseek(pFile, 0, SEEK_END);
  *pSize = ftell(pFile);
  rewind(pFile);
  void *buffer = malloc(*pSize);
  fread(buffer, *pSize, 1, pFile);
  fclose(pFile);
  return buffer;
}


x86 assembly (clang, -O0):
<loadfile>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe75(%rip),%rsi
call   1090 <fopen@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
jne    11b7 <loadfile+0x47>
mov    -0x18(%rbp),%rax
movq   $0x0,(%rax)
movq   $0x0,-0x8(%rbp)
jmp    1221 <loadfile+0xb1>
mov    -0x20(%rbp),%rdi
mov    0x2e26(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1080 <fseek@plt>
mov    -0x20(%rbp),%rdi
call   1060 <ftell@plt>
mov    %rax,%rcx
mov    -0x18(%rbp),%rax
mov    %rcx,(%rax)
mov    -0x20(%rbp),%rdi
call   1050 <rewind@plt>
mov    -0x18(%rbp),%rax
mov    (%rax),%rdi
call   1070 <malloc@plt>
mov    %rax,-0x28(%rbp)
mov    -0x28(%rbp),%rdi
mov    -0x18(%rbp),%rax
mov    (%rax),%rsi
mov    -0x20(%rbp),%rcx
mov    $0x1,%edx
call   1030 <fread@plt>
mov    -0x20(%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
mov    %rsi,%r14
lea    0xe81(%rip),%rsi
call   1090 <fopen@plt>
test   %rax,%rax
je     11dd <loadfile+0x6d>
mov    %rax,%rbx
mov    0x2e55(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1080 <fseek@plt>
mov    %rbx,%rdi
call   1060 <ftell@plt>
mov    %rax,(%r14)
mov    %rbx,%rdi
call   1050 <rewind@plt>
mov    (%r14),%r15
mov    %r15,%rdi
call   1070 <malloc@plt>
mov    %rax,%r14
mov    %rax,%rdi
mov    %r15,%rsi
mov    $0x1,%edx
mov    %rbx,%rcx
call   1030 <fread@plt>
mov    %rbx,%rdi
call   1040 <fclose@plt>
jmp    11e7 <loadfile+0x77>
movq   $0x0,(%r14)
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, i64* %1) {
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i64*
%6 = alloca i32*
%7 = alloca i8*
store i8* %0, i8** %4
store i64* %1, i64** %5
%8 = load i8*, i8** %4
%9 = call i32* @fopen(i8* %8, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32* %9, i32** %6
%10 = load i32*, i32** %6
%11 = icmp eq i32* %10, null
br i1 %11, label %12, label %14
12: ; preds = %2
%13 = load i64*, i64** %5
store i64 0, i64* %13
store i8* null, i8** %3
br label %34
14: ; preds = %2
%15 = load i32*, i32** %6
%16 = load i32, i32* @SEEK_END
%17 = call i32 @fseek(i32* %15, i32 0, i32 %16)
%18 = load i32*, i32** %6
%19 = call i64 @ftell(i32* %18)
%20 = load i64*, i64** %5
store i64 %19, i64* %20
%21 = load i32*, i32** %6
%22 = call i32 @rewind(i32* %21)
%23 = load i64*, i64** %5
%24 = load i64, i64* %23
%25 = call i8* @malloc(i64 %24)
store i8* %25, i8** %7
%26 = load i8*, i8** %7
%27 = load i64*, i64** %5
%28 = load i64, i64* %27
%29 = load i32*, i32** %6
%30 = call i32 @fread(i8* %26, i64 %28, i32 1, i32* %29)
%31 = load i32*, i32** %6
%32 = call i32 @fclose(i32* %31)
%33 = load i8*, i8** %7
store i8* %33, i8** %3
br label %34
34: ; preds = %14, %12
%35 = load i8*, i8** %3
ret i8* %35
}

LLVM IR (-O2):
@.str = [3 x i8] c"rb\00"
@SEEK_END = global i32 0
define noalias i8* @loadfile(i8* nocapture %0, i64* nocapture %1) {
%3 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%4 = icmp eq i32* %3, null
br i1 %4, label %5, label %6
5: ; preds = %2
store i64 0, i64* %1
br label %15
6: ; preds = %2
%7 = load i32, i32* @SEEK_END
%8 = tail call i32 @fseek(i32* %3, i32 0, i32 %7)
%9 = tail call i64 @ftell(i32* %3)
store i64 %9, i64* %1
%10 = tail call i32 @rewind(i32* %3)
%11 = load i64, i64* %1
%12 = tail call i8* @malloc(i64 %11)
%13 = tail call i32 @fread(i8* %12, i64 %11, i32 1, i32* %3)
%14 = tail call i32 @fclose(i32* %3)
br label %15
15: ; preds = %6, %5
%16 = phi i8* [ null, %5 ], [ %12, %6 ]
ret i8* %16
}