#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*/ const uint8_t;
typedef int /*<<< orphan*/ FILE;

/* Variables and functions */
int /*<<< orphan*/ SEEK_END;
int /*<<< orphan*/ SEEK_SET;
int /*<<< orphan*/ const *alloc_sealed(int);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char const *, char *);
int /*<<< orphan*/ fread(int /*<<< orphan*/ const *, int, int,
                         int /*<<< orphan*/ *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
int ftell(int /*<<< orphan*/ *);
const uint8_t *TryLoadBios(const char *name) {
  FILE *f = fopen(name, "rb");
  if (!f)
    return NULL;
  fseek(f, 0, SEEK_END);
  int size = ftell(f);
  uint8_t *ret = alloc_sealed(size);
  fseek(f, 0, SEEK_SET);
  fread(ret, 1, size, f);
  fclose(f);
  return ret;
}


x86 assembly (clang, -O0):
<TryLoadBios>:
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 <TryLoadBios+0x38>
movq   $0x0,-0x8(%rbp)
jmp    11fe <TryLoadBios+0x9e>
mov    -0x18(%rbp),%rdi
mov    0x2e45(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
mov    -0x18(%rbp),%rdi
call   1060 <ftell@plt>
mov    %eax,-0x1c(%rbp)
mov    -0x1c(%rbp),%edi
call   1050 <alloc_sealed@plt>
mov    %rax,-0x28(%rbp)
mov    -0x18(%rbp),%rdi
mov    0x2e09(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
mov    -0x28(%rbp),%rdi
mov    -0x1c(%rbp),%edx
mov    -0x18(%rbp),%rcx
mov    $0x1,%esi
call   1030 <fread@plt>
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):
<TryLoadBios>:
push   %rbp
push   %r14
push   %rbx
lea    0xe95(%rip),%rsi
call   1080 <fopen@plt>
test   %rax,%rax
je     11ce <TryLoadBios+0x6e>
mov    %rax,%rbx
mov    0x2e69(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
mov    %rbx,%rdi
call   1060 <ftell@plt>
mov    %eax,%ebp
mov    %eax,%edi
call   1050 <alloc_sealed@plt>
mov    %rax,%r14
mov    0x2e32(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
mov    %r14,%rdi
mov    $0x1,%esi
mov    %ebp,%edx
mov    %rbx,%rcx
call   1030 <fread@plt>
mov    %rbx,%rdi
call   1040 <fclose@plt>
jmp    11d1 <TryLoadBios+0x71>
xor    %r14d,%r14d
mov    %r14,%rax
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
@.str = [3 x i8] c"rb\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
define i32* @TryLoadBios(i8* %0) {
%2 = alloca i32*
%3 = alloca i8*
%4 = alloca i32*
%5 = alloca i32
%6 = alloca i32*
store i8* %0, i8** %3
%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 = load i32*, i32** %4
%10 = icmp ne i32* %9, null
br i1 %10, label %12, label %11
11: ; preds = %1
store i32* null, i32** %2
br label %30
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 i32 @ftell(i32* %16)
store i32 %17, i32* %5
%18 = load i32, i32* %5
%19 = call i32* @alloc_sealed(i32 %18)
store i32* %19, i32** %6
%20 = load i32*, i32** %4
%21 = load i32, i32* @SEEK_SET
%22 = call i32 @fseek(i32* %20, i32 0, i32 %21)
%23 = load i32*, i32** %6
%24 = load i32, i32* %5
%25 = load i32*, i32** %4
%26 = call i32 @fread(i32* %23, i32 1, i32 %24, i32* %25)
%27 = load i32*, i32** %4
%28 = call i32 @fclose(i32* %27)
%29 = load i32*, i32** %6
store i32* %29, i32** %2
br label %30
30: ; preds = %12, %11
%31 = load i32*, i32** %2
ret i32* %31
}

LLVM IR (-O2):
@.str = [3 x i8] c"rb\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
define i32* @TryLoadBios(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 %13, 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 i32 @ftell(i32* %2)
%8 = tail call i32* @alloc_sealed(i32 %7)
%9 = load i32, i32* @SEEK_SET
%10 = tail call i32 @fseek(i32* %2, i32 0, i32 %9)
%11 = tail call i32 @fread(i32* %8, i32 1, i32 %7, i32* %2)
%12 = tail call i32 @fclose(i32* %2)
br label %13
13: ; preds = %1, %4
%14 = phi i32* [ %8, %4 ], [ null, %1 ]
ret i32* %14
}