#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 /*<<< orphan*/ fread(void *, int, int, int /*<<< orphan*/ *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
int ftell(int /*<<< orphan*/ *);
void *malloc(int);
int /*<<< orphan*/ rewind(int /*<<< orphan*/ *);
void *readFile(const char *path, int *lSize) {
  FILE *fp = fopen(path, "rb");
  if (fp == NULL) {
    return NULL;
  }
  fseek(fp, 0, SEEK_END);
  *lSize = ftell(fp);
  rewind(fp);
  void *file = malloc(*lSize);
  fread(file, 1, *lSize, fp);
  fclose(fp);
  return file;
}


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    0xe75(%rip),%rsi
call   1090 <fopen@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
jne    11ac <readFile+0x3c>
movq   $0x0,-0x8(%rbp)
jmp    1212 <readFile+0xa2>
mov    -0x20(%rbp),%rdi
mov    0x2e31(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1080 <fseek@plt>
mov    -0x20(%rbp),%rdi
call   1060 <ftell@plt>
mov    %eax,%ecx
mov    -0x18(%rbp),%rax
mov    %ecx,(%rax)
mov    -0x20(%rbp),%rdi
call   1050 <rewind@plt>
mov    -0x18(%rbp),%rax
mov    (%rax),%edi
call   1070 <malloc@plt>
mov    %rax,-0x28(%rbp)
mov    -0x28(%rbp),%rdi
mov    -0x18(%rbp),%rax
mov    (%rax),%edx
mov    -0x20(%rbp),%rcx
mov    $0x1,%esi
call   1030 <fread@plt>
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   %rbp
push   %r14
push   %rbx
mov    %rsi,%r14
lea    0xe82(%rip),%rsi
call   1090 <fopen@plt>
test   %rax,%rax
je     11da <readFile+0x6a>
mov    %rax,%rbx
mov    0x2e56(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1080 <fseek@plt>
mov    %rbx,%rdi
call   1060 <ftell@plt>
mov    %eax,(%r14)
mov    %rbx,%rdi
call   1050 <rewind@plt>
mov    (%r14),%ebp
mov    %ebp,%edi
call   1070 <malloc@plt>
mov    %rax,%r14
mov    %rax,%rdi
mov    $0x1,%esi
mov    %ebp,%edx
mov    %rbx,%rcx
call   1030 <fread@plt>
mov    %rbx,%rdi
call   1040 <fclose@plt>
jmp    11dd <readFile+0x6d>
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
define i8* @readFile(i8* %0, i32* %1) {
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i32*
%6 = alloca i32*
%7 = alloca i8*
store i8* %0, i8** %4
store i32* %1, i32** %5
%8 = load i8*, i8** %4
%9 = call i32* @fopen(i8* %8, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32* %9, i32** %6
%10 = load i32*, i32** %6
%11 = icmp eq i32* %10, null
br i1 %11, label %12, label %13
12: ; preds = %2
store i8* null, i8** %3
br label %33
13: ; preds = %2
%14 = load i32*, i32** %6
%15 = load i32, i32* @SEEK_END
%16 = call i32 @fseek(i32* %14, i32 0, i32 %15)
%17 = load i32*, i32** %6
%18 = call i32 @ftell(i32* %17)
%19 = load i32*, i32** %5
store i32 %18, i32* %19
%20 = load i32*, i32** %6
%21 = call i32 @rewind(i32* %20)
%22 = load i32*, i32** %5
%23 = load i32, i32* %22
%24 = call i8* @malloc(i32 %23)
store i8* %24, i8** %7
%25 = load i8*, i8** %7
%26 = load i32*, i32** %5
%27 = load i32, i32* %26
%28 = load i32*, i32** %6
%29 = call i32 @fread(i8* %25, i32 1, i32 %27, i32* %28)
%30 = load i32*, i32** %6
%31 = call i32 @fclose(i32* %30)
%32 = load i8*, i8** %7
store i8* %32, i8** %3
br label %33
33: ; preds = %13, %12
%34 = load i8*, i8** %3
ret i8* %34
}

LLVM IR (-O2):
@.str = [3 x i8] c"rb\00"
@SEEK_END = global i32 0
define noalias i8* @readFile(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 %14, 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 = tail call i32 @fread(i8* %11, i32 1, i32 %10, i32* %3)
%13 = tail call i32 @fclose(i32* %3)
br label %14
14: ; preds = %2, %5
%15 = phi i8* [ %11, %5 ], [ null, %2 ]
ret i8* %15
}