#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(void *, int, int, int /*<<< orphan*/ *);
int /*<<< orphan*/ free(void *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
int ftell(int /*<<< orphan*/ *);
void *malloc(int);
int /*<<< orphan*/ rewind(int /*<<< orphan*/ *);
void *load_file(const char *filename, int *size) {
  FILE *fp;
  void *data;
  int n;
  fp = fopen(filename, "rb");
  if (!fp) {
    return NULL;
  }
  fseek(fp, 0, SEEK_END);
  *size = ftell(fp);
  rewind(fp);
  data = malloc(*size);
  if (!data) {
    fclose(fp);
    return NULL;
  }
  n = fread(data, 1, *size, fp);
  fclose(fp);
  if (n != *size) {
    free(data);
    return NULL;
  }
  return data;
}


x86 assembly (clang, -O0):
<load_file>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe65(%rip),%rsi
call   10a0 <fopen@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
jne    11bc <load_file+0x3c>
movq   $0x0,-0x8(%rbp)
jmp    126b <load_file+0xeb>
mov    -0x20(%rbp),%rdi
mov    0x2e21(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1090 <fseek@plt>
mov    -0x20(%rbp),%rdi
call   1070 <ftell@plt>
mov    %eax,%ecx
mov    -0x18(%rbp),%rax
mov    %ecx,(%rax)
mov    -0x20(%rbp),%rdi
call   1060 <rewind@plt>
mov    -0x18(%rbp),%rax
mov    (%rax),%edi
call   1080 <malloc@plt>
mov    %rax,-0x28(%rbp)
cmpq   $0x0,-0x28(%rbp)
jne    121a <load_file+0x9a>
mov    -0x20(%rbp),%rdi
call   1050 <fclose@plt>
movq   $0x0,-0x8(%rbp)
jmp    126b <load_file+0xeb>
mov    -0x28(%rbp),%rdi
mov    -0x18(%rbp),%rax
mov    (%rax),%edx
mov    -0x20(%rbp),%rcx
mov    $0x1,%esi
call   1040 <fread@plt>
mov    %eax,-0x2c(%rbp)
mov    -0x20(%rbp),%rdi
call   1050 <fclose@plt>
mov    -0x2c(%rbp),%eax
mov    -0x18(%rbp),%rcx
cmp    (%rcx),%eax
je     1263 <load_file+0xe3>
mov    -0x28(%rbp),%rdi
call   1030 <free@plt>
movq   $0x0,-0x8(%rbp)
jmp    126b <load_file+0xeb>
mov    -0x28(%rbp),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<load_file>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %rsi,%r14
lea    0xe6f(%rip),%rsi
call   10a0 <fopen@plt>
test   %rax,%rax
je     1209 <load_file+0x89>
mov    %rax,%rbx
mov    0x2e43(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1090 <fseek@plt>
mov    %rbx,%rdi
call   1070 <ftell@plt>
mov    %eax,(%r14)
mov    %rbx,%rdi
call   1060 <rewind@plt>
mov    (%r14),%ebp
mov    %ebp,%edi
call   1080 <malloc@plt>
test   %rax,%rax
je     1201 <load_file+0x81>
mov    %rax,%r15
mov    %rax,%rdi
mov    $0x1,%esi
mov    %ebp,%edx
mov    %rbx,%rcx
call   1040 <fread@plt>
mov    %eax,%ebp
mov    %rbx,%rdi
call   1050 <fclose@plt>
cmp    (%r14),%ebp
je     120c <load_file+0x8c>
mov    %r15,%rdi
call   1030 <free@plt>
jmp    1209 <load_file+0x89>
mov    %rbx,%rdi
call   1050 <fclose@plt>
xor    %r15d,%r15d
mov    %r15,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [3 x i8] c"rb\00"
@SEEK_END = global i32 0
define i8* @load_file(i8* %0, i32* %1) {
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i32*
%6 = alloca i32*
%7 = alloca i8*
%8 = alloca i32
store i8* %0, i8** %4
store i32* %1, i32** %5
%9 = load i8*, i8** %4
%10 = call i32* @fopen(i8* %9, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32* %10, i32** %6
%11 = load i32*, i32** %6
%12 = icmp ne i32* %11, null
br i1 %12, label %14, label %13
13: ; preds = %2
store i8* null, i8** %3
br label %48
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 i32 @ftell(i32* %18)
%20 = load i32*, i32** %5
store i32 %19, i32* %20
%21 = load i32*, i32** %6
%22 = call i32 @rewind(i32* %21)
%23 = load i32*, i32** %5
%24 = load i32, i32* %23
%25 = call i8* @malloc(i32 %24)
store i8* %25, i8** %7
%26 = load i8*, i8** %7
%27 = icmp ne i8* %26, null
br i1 %27, label %31, label %28
28: ; preds = %14
%29 = load i32*, i32** %6
%30 = call i32 @fclose(i32* %29)
store i8* null, i8** %3
br label %48
31: ; preds = %14
%32 = load i8*, i8** %7
%33 = load i32*, i32** %5
%34 = load i32, i32* %33
%35 = load i32*, i32** %6
%36 = call i32 @fread(i8* %32, i32 1, i32 %34, i32* %35)
store i32 %36, i32* %8
%37 = load i32*, i32** %6
%38 = call i32 @fclose(i32* %37)
%39 = load i32, i32* %8
%40 = load i32*, i32** %5
%41 = load i32, i32* %40
%42 = icmp ne i32 %39, %41
br i1 %42, label %43, label %46
43: ; preds = %31
%44 = load i8*, i8** %7
%45 = call i32 @free(i8* %44)
store i8* null, i8** %3
br label %48
46: ; preds = %31
%47 = load i8*, i8** %7
store i8* %47, i8** %3
br label %48
48: ; preds = %46, %43, %28, %13
%49 = load i8*, i8** %3
ret i8* %49
}

LLVM IR (-O2):
@.str = [3 x i8] c"rb\00"
@SEEK_END = global i32 0
define noalias i8* @load_file(i8* nocapture %0, i32* 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 %22, label %5
5: ; preds = %2
%6 = load i32, i32* @SEEK_END
%7 = tail call i32 @fseek(i32* %3, i32 0, i32 %6)
%8 = tail call i32 @ftell(i32* %3)
store i32 %8, i32* %1
%9 = tail call i32 @rewind(i32* %3)
%10 = load i32, i32* %1
%11 = tail call i8* @malloc(i32 %10)
%12 = icmp eq i8* %11, null
br i1 %12, label %13, label %15
13: ; preds = %5
%14 = tail call i32 @fclose(i32* %3)
br label %22
15: ; preds = %5
%16 = tail call i32 @fread(i8* %11, i32 1, i32 %10, i32* %3)
%17 = tail call i32 @fclose(i32* %3)
%18 = load i32, i32* %1
%19 = icmp eq i32 %16, %18
br i1 %19, label %22, label %20
20: ; preds = %15
%21 = tail call i32 @free(i8* %11)
br label %22
22: ; preds = %15, %2, %20, %13
%23 = phi i8* [ null, %20 ], [ null, %13 ], [ null, %2 ], [ %11, %15 ]
ret i8* %23
}