#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;
unsigned char *calloc(size_t, int);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fread(unsigned char *, int, size_t, int /*<<< orphan*/ *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
size_t ftell(int /*<<< orphan*/ *);
unsigned char *read_file(char *filename) {
  FILE *fp = fopen(filename, "rb");
  size_t size;
  fseek(fp, 0, SEEK_END);
  size = ftell(fp);
  fseek(fp, 0, SEEK_SET);
  unsigned char *text = calloc(size + 1, sizeof(char));
  fread(text, 1, size, fp);
  fclose(fp);
  return text;
}


x86 assembly (clang, -O0):
<read_file>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xe89(%rip),%rsi
call   1080 <fopen@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
mov    0x2e5d(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
mov    -0x10(%rbp),%rdi
call   1060 <ftell@plt>
mov    %rax,-0x18(%rbp)
mov    -0x10(%rbp),%rdi
mov    0x2e2c(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
mov    -0x18(%rbp),%rdi
add    $0x1,%rdi
mov    $0x1,%esi
call   1050 <calloc@plt>
mov    %rax,-0x20(%rbp)
mov    -0x20(%rbp),%rdi
mov    -0x18(%rbp),%rdx
mov    -0x10(%rbp),%rcx
mov    $0x1,%esi
call   1030 <fread@plt>
mov    -0x10(%rbp),%rdi
call   1040 <fclose@plt>
mov    -0x20(%rbp),%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<read_file>:
push   %r15
push   %r14
push   %rbx
lea    0xe94(%rip),%rsi
call   1080 <fopen@plt>
mov    %rax,%rbx
mov    0x2e6d(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
mov    %rbx,%rdi
call   1060 <ftell@plt>
mov    %rax,%r14
mov    0x2e3f(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
lea    0x1(%r14),%rdi
mov    $0x1,%esi
call   1050 <calloc@plt>
mov    %rax,%r15
mov    %rax,%rdi
mov    $0x1,%esi
mov    %r14,%rdx
mov    %rbx,%rcx
call   1030 <fread@plt>
mov    %rbx,%rdi
call   1040 <fclose@plt>
mov    %r15,%rax
pop    %rbx
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* @read_file(i8* %0) {
%2 = alloca i8*
%3 = alloca i32*
%4 = alloca i64
%5 = alloca i8*
store i8* %0, i8** %2
%6 = load i8*, i8** %2
%7 = call i32* @fopen(i8* %6, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32* %7, i32** %3
%8 = load i32*, i32** %3
%9 = load i32, i32* @SEEK_END
%10 = call i32 @fseek(i32* %8, i32 0, i32 %9)
%11 = load i32*, i32** %3
%12 = call i64 @ftell(i32* %11)
store i64 %12, i64* %4
%13 = load i32*, i32** %3
%14 = load i32, i32* @SEEK_SET
%15 = call i32 @fseek(i32* %13, i32 0, i32 %14)
%16 = load i64, i64* %4
%17 = add i64 %16, 1
%18 = call i8* @calloc(i64 %17, i32 1)
store i8* %18, i8** %5
%19 = load i8*, i8** %5
%20 = load i64, i64* %4
%21 = load i32*, i32** %3
%22 = call i32 @fread(i8* %19, i32 1, i64 %20, i32* %21)
%23 = load i32*, i32** %3
%24 = call i32 @fclose(i32* %23)
%25 = load i8*, i8** %5
ret i8* %25
}

LLVM IR (-O2):
@.str = [3 x i8] c"rb\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
define i8* @read_file(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 = load i32, i32* @SEEK_END
%4 = tail call i32 @fseek(i32* %2, i32 0, i32 %3)
%5 = tail call i64 @ftell(i32* %2)
%6 = load i32, i32* @SEEK_SET
%7 = tail call i32 @fseek(i32* %2, i32 0, i32 %6)
%8 = add i64 %5, 1
%9 = tail call i8* @calloc(i64 %8, i32 1)
%10 = tail call i32 @fread(i8* %9, i32 1, i64 %5, i32* %2)
%11 = tail call i32 @fclose(i32* %2)
ret i8* %9
}