#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 *);
size_t fread(unsigned char *, int, size_t, int /*<<< orphan*/ *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
size_t ftell(int /*<<< orphan*/ *);
unsigned char *malloc(size_t);
unsigned char *readfile(const char *name, size_t *len) {
  FILE *f;
  unsigned char *buf;
  size_t fret;
  f = fopen(name, "rb");
  if (f == NULL)
    return NULL;
  fseek(f, 0, SEEK_END);
  *len = ftell(f);
  fseek(f, 0, SEEK_SET);
  buf = malloc(*len);
  if (buf == NULL) {
    fclose(f);
    return NULL;
  }
  fret = fread(buf, 1, *len, f);
  fclose(f);
  return buf;
}


x86 assembly (clang, -O0):
<readfile>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe85(%rip),%rsi
call   1080 <fopen@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
jne    119c <readfile+0x3c>
movq   $0x0,-0x8(%rbp)
jmp    1236 <readfile+0xd6>
mov    -0x20(%rbp),%rdi
mov    0x2e41(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
mov    -0x20(%rbp),%rdi
call   1050 <ftell@plt>
mov    %rax,%rcx
mov    -0x18(%rbp),%rax
mov    %rcx,(%rax)
mov    -0x20(%rbp),%rdi
mov    0x2e0a(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
mov    -0x18(%rbp),%rax
mov    (%rax),%rdi
call   1060 <malloc@plt>
mov    %rax,-0x28(%rbp)
cmpq   $0x0,-0x28(%rbp)
jne    1208 <readfile+0xa8>
mov    -0x20(%rbp),%rdi
call   1040 <fclose@plt>
movq   $0x0,-0x8(%rbp)
jmp    1236 <readfile+0xd6>
mov    -0x28(%rbp),%rdi
mov    -0x18(%rbp),%rax
mov    (%rax),%rdx
mov    -0x20(%rbp),%rcx
mov    $0x1,%esi
call   1030 <fread@plt>
mov    %rax,-0x30(%rbp)
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):
<readfile>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
mov    %rsi,%r15
lea    0xe8e(%rip),%rsi
call   1080 <fopen@plt>
test   %rax,%rax
je     11e6 <readfile+0x86>
mov    %rax,%rbx
mov    0x2e62(%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    0x2e31(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
mov    (%r15),%r15
mov    %r15,%rdi
call   1060 <malloc@plt>
test   %rax,%rax
je     11dc <readfile+0x7c>
mov    %rax,%r12
mov    %rax,%rdi
mov    $0x1,%esi
mov    %r15,%rdx
mov    %rbx,%rcx
call   1030 <fread@plt>
mov    %r12,%r14
mov    %rbx,%rdi
call   1040 <fclose@plt>
jmp    11e9 <readfile+0x89>
xor    %r14d,%r14d
mov    %r14,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [3 x i8] c"rb\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
define i8* @readfile(i8* %0, i64* %1) {
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i64*
%6 = alloca i32*
%7 = alloca i8*
%8 = alloca i64
store i8* %0, i8** %4
store i64* %1, i64** %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 eq i32* %11, null
br i1 %12, label %13, label %14
13: ; preds = %2
store i8* null, i8** %3
br label %41
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 = load i32, i32* @SEEK_SET
%23 = call i32 @fseek(i32* %21, i32 0, i32 %22)
%24 = load i64*, i64** %5
%25 = load i64, i64* %24
%26 = call i8* @malloc(i64 %25)
store i8* %26, i8** %7
%27 = load i8*, i8** %7
%28 = icmp eq i8* %27, null
br i1 %28, label %29, label %32
29: ; preds = %14
%30 = load i32*, i32** %6
%31 = call i32 @fclose(i32* %30)
store i8* null, i8** %3
br label %41
32: ; preds = %14
%33 = load i8*, i8** %7
%34 = load i64*, i64** %5
%35 = load i64, i64* %34
%36 = load i32*, i32** %6
%37 = call i64 @fread(i8* %33, i32 1, i64 %35, i32* %36)
store i64 %37, i64* %8
%38 = load i32*, i32** %6
%39 = call i32 @fclose(i32* %38)
%40 = load i8*, i8** %7
store i8* %40, i8** %3
br label %41
41: ; preds = %32, %29, %13
%42 = load i8*, i8** %3
ret i8* %42
}

LLVM IR (-O2):
@.str = [3 x i8] c"rb\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
define noalias i8* @readfile(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 %19, 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 i64 @ftell(i32* %3)
store i64 %8, i64* %1
%9 = load i32, i32* @SEEK_SET
%10 = tail call i32 @fseek(i32* %3, i32 0, i32 %9)
%11 = load i64, i64* %1
%12 = tail call i8* @malloc(i64 %11)
%13 = icmp eq i8* %12, null
br i1 %13, label %16, label %14
14: ; preds = %5
%15 = tail call i64 @fread(i8* %12, i32 1, i64 %11, i32* %3)
br label %16
16: ; preds = %5, %14
%17 = phi i8* [ %12, %14 ], [ null, %5 ]
%18 = tail call i32 @fclose(i32* %3)
br label %19
19: ; preds = %16, %2
%20 = phi i8* [ null, %2 ], [ %17, %16 ]
ret i8* %20
}