#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*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char const *, char *);
int /*<<< orphan*/ fread(unsigned char *, int, long, int /*<<< orphan*/ *);
int read_file_to_mem(const char *filename, unsigned char *buf, long buf_sz) {
  FILE *f = 0;
  f = fopen(filename, "rb");
  if (!f)
    return 0;
  fread(buf, 1, buf_sz, f);
  fclose(f);
  return 1;
}


x86 assembly (clang, -O0):
<read_file_to_mem>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    %rdx,-0x20(%rbp)
movq   $0x0,-0x28(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xea9(%rip),%rsi
call   1050 <fopen@plt>
mov    %rax,-0x28(%rbp)
cmpq   $0x0,-0x28(%rbp)
jne    1177 <read_file_to_mem+0x47>
movl   $0x0,-0x4(%rbp)
jmp    119d <read_file_to_mem+0x6d>
mov    -0x18(%rbp),%rdi
mov    -0x20(%rbp),%rdx
mov    -0x28(%rbp),%rcx
mov    $0x1,%esi
call   1030 <fread@plt>
mov    -0x28(%rbp),%rdi
call   1040 <fclose@plt>
movl   $0x1,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<read_file_to_mem>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %rdx,%r14
mov    %rsi,%r15
lea    0xebc(%rip),%rsi
call   1050 <fopen@plt>
test   %rax,%rax
je     1173 <read_file_to_mem+0x43>
mov    %rax,%rbx
mov    $0x1,%ebp
mov    %r15,%rdi
mov    $0x1,%esi
mov    %r14,%rdx
mov    %rax,%rcx
call   1030 <fread@plt>
mov    %rbx,%rdi
call   1040 <fclose@plt>
jmp    1175 <read_file_to_mem+0x45>
xor    %ebp,%ebp
mov    %ebp,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [3 x i8] c"rb\00"
define i32 @read_file_to_mem(i8* %0, i8* %1, i64 %2) {
%4 = alloca i32
%5 = alloca i8*
%6 = alloca i8*
%7 = alloca i64
%8 = alloca i32*
store i8* %0, i8** %5
store i8* %1, i8** %6
store i64 %2, i64* %7
store i32* null, i32** %8
%9 = load i8*, i8** %5
%10 = call i32* @fopen(i8* %9, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32* %10, i32** %8
%11 = load i32*, i32** %8
%12 = icmp ne i32* %11, null
br i1 %12, label %14, label %13
13: ; preds = %3
store i32 0, i32* %4
br label %21
14: ; preds = %3
%15 = load i8*, i8** %6
%16 = load i64, i64* %7
%17 = load i32*, i32** %8
%18 = call i32 @fread(i8* %15, i32 1, i64 %16, i32* %17)
%19 = load i32*, i32** %8
%20 = call i32 @fclose(i32* %19)
store i32 1, i32* %4
br label %21
21: ; preds = %14, %13
%22 = load i32, i32* %4
ret i32 %22
}

LLVM IR (-O2):
@.str = [3 x i8] c"rb\00"
define i32 @read_file_to_mem(i8* nocapture %0, i8* nocapture %1, i64 %2) {
%4 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%5 = icmp eq i32* %4, null
br i1 %5, label %9, label %6
6: ; preds = %3
%7 = tail call i32 @fread(i8* %1, i32 1, i64 %2, i32* %4)
%8 = tail call i32 @fclose(i32* %4)
br label %9
9: ; preds = %3, %6
%10 = phi i32 [ 1, %6 ], [ 0, %3 ]
ret i32 %10
}