#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 fread(char *, int, int, int /*<<< orphan*/ *);
int fseek(int /*<<< orphan*/ *, int /*<<< orphan*/, int /*<<< orphan*/);
int ftell(int /*<<< orphan*/ *);
scalar_t__ malloc(int);
int /*<<< orphan*/ rewind(int /*<<< orphan*/ *);
char *readFile(const char *filename, int *n) {
  FILE *fp;
  char *rawdata;
  fp = fopen(filename, "r");
  if (!fp)
    return (NULL);
  if (fseek(fp, 0, SEEK_END) == -1)
    return (NULL);
  *n = ftell(fp);
  if (*n == -1)
    return (NULL);
  rewind(fp);
  rawdata = (char *)malloc((*n) * sizeof(char));
  if (!rawdata)
    return (NULL);
  if (fread(rawdata, sizeof(char), *n, fp) != *n)
    return (NULL);
  fclose(fp);
  return (rawdata);
}


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    127a <readFile+0x10a>
mov    -0x20(%rbp),%rdi
mov    0x2e31(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1080 <fseek@plt>
cmp    $0xffffffff,%eax
jne    11d6 <readFile+0x66>
movq   $0x0,-0x8(%rbp)
jmp    127a <readFile+0x10a>
mov    -0x20(%rbp),%rdi
call   1060 <ftell@plt>
mov    %eax,%ecx
mov    -0x18(%rbp),%rax
mov    %ecx,(%rax)
mov    -0x18(%rbp),%rax
cmpl   $0xffffffff,(%rax)
jne    1201 <readFile+0x91>
movq   $0x0,-0x8(%rbp)
jmp    127a <readFile+0x10a>
mov    -0x20(%rbp),%rdi
call   1050 <rewind@plt>
mov    -0x18(%rbp),%rax
movslq (%rax),%rax
shl    $0x0,%rax
mov    %eax,%edi
call   1070 <malloc@plt>
mov    %rax,-0x28(%rbp)
cmpq   $0x0,-0x28(%rbp)
jne    1238 <readFile+0xc8>
movq   $0x0,-0x8(%rbp)
jmp    127a <readFile+0x10a>
mov    -0x28(%rbp),%rdi
mov    -0x18(%rbp),%rax
mov    (%rax),%edx
mov    -0x20(%rbp),%rcx
mov    $0x1,%esi
call   1030 <fread@plt>
mov    -0x18(%rbp),%rcx
cmp    (%rcx),%eax
je     1269 <readFile+0xf9>
movq   $0x0,-0x8(%rbp)
jmp    127a <readFile+0x10a>
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   %rbx
mov    %rsi,%r14
lea    0xe81(%rip),%rsi
call   1090 <fopen@plt>
test   %rax,%rax
je     11f1 <readFile+0x81>
mov    %rax,%rbx
mov    0x2e55(%rip),%rax
mov    (%rax),%edx
xor    %r15d,%r15d
mov    %rbx,%rdi
xor    %esi,%esi
call   1080 <fseek@plt>
cmp    $0xffffffff,%eax
je     11f4 <readFile+0x84>
mov    %rbx,%rdi
call   1060 <ftell@plt>
mov    %eax,(%r14)
cmp    $0xffffffff,%eax
je     11f1 <readFile+0x81>
mov    %rbx,%rdi
call   1050 <rewind@plt>
mov    (%r14),%edi
call   1070 <malloc@plt>
test   %rax,%rax
je     11f1 <readFile+0x81>
mov    %rax,%r15
mov    (%r14),%edx
mov    %rax,%rdi
mov    $0x1,%esi
mov    %rbx,%rcx
call   1030 <fread@plt>
cmp    (%r14),%eax
jne    11f1 <readFile+0x81>
mov    %rbx,%rdi
call   1040 <fclose@plt>
jmp    11f4 <readFile+0x84>
xor    %r15d,%r15d
mov    %r15,%rax
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [2 x i8] c"r\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 ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %9, i32** %6
%10 = load i32*, i32** %6
%11 = icmp ne i32* %10, null
br i1 %11, label %13, label %12
12: ; preds = %2
store i8* null, i8** %3
br label %54
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 = icmp eq i32 %16, -1
br i1 %17, label %18, label %19
18: ; preds = %13
store i8* null, i8** %3
br label %54
19: ; preds = %13
%20 = load i32*, i32** %6
%21 = call i32 @ftell(i32* %20)
%22 = load i32*, i32** %5
store i32 %21, i32* %22
%23 = load i32*, i32** %5
%24 = load i32, i32* %23
%25 = icmp eq i32 %24, -1
br i1 %25, label %26, label %27
26: ; preds = %19
store i8* null, i8** %3
br label %54
27: ; preds = %19
%28 = load i32*, i32** %6
%29 = call i32 @rewind(i32* %28)
%30 = load i32*, i32** %5
%31 = load i32, i32* %30
%32 = sext i32 %31 to i64
%33 = mul i64 %32, 1
%34 = trunc i64 %33 to i32
%35 = call i64 @malloc(i32 %34)
%36 = inttoptr i64 %35 to i8*
store i8* %36, i8** %7
%37 = load i8*, i8** %7
%38 = icmp ne i8* %37, null
br i1 %38, label %40, label %39
39: ; preds = %27
store i8* null, i8** %3
br label %54
40: ; preds = %27
%41 = load i8*, i8** %7
%42 = load i32*, i32** %5
%43 = load i32, i32* %42
%44 = load i32*, i32** %6
%45 = call i32 @fread(i8* %41, i32 1, i32 %43, i32* %44)
%46 = load i32*, i32** %5
%47 = load i32, i32* %46
%48 = icmp ne i32 %45, %47
br i1 %48, label %49, label %50
49: ; preds = %40
store i8* null, i8** %3
br label %54
50: ; preds = %40
%51 = load i32*, i32** %6
%52 = call i32 @fclose(i32* %51)
%53 = load i8*, i8** %7
store i8* %53, i8** %3
br label %54
54: ; preds = %50, %49, %39, %26, %18, %12
%55 = load i8*, i8** %3
ret i8* %55
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@SEEK_END = global i32 0
define i8* @readFile(i8* nocapture %0, i32* nocapture %1) {
%3 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%4 = icmp eq i32* %3, null
br i1 %4, label %25, label %5
5: ; preds = %2
%6 = load i32, i32* @SEEK_END
%7 = tail call i32 @fseek(i32* %3, i32 0, i32 %6)
%8 = icmp eq i32 %7, -1
br i1 %8, label %25, label %9
9: ; preds = %5
%10 = tail call i32 @ftell(i32* %3)
store i32 %10, i32* %1
%11 = icmp eq i32 %10, -1
br i1 %11, label %25, label %12
12: ; preds = %9
%13 = tail call i32 @rewind(i32* %3)
%14 = load i32, i32* %1
%15 = tail call i64 @malloc(i32 %14)
%16 = inttoptr i64 %15 to i8*
%17 = icmp eq i64 %15, 0
br i1 %17, label %25, label %18
18: ; preds = %12
%19 = load i32, i32* %1
%20 = tail call i32 @fread(i8* %16, i32 1, i32 %19, i32* %3)
%21 = load i32, i32* %1
%22 = icmp eq i32 %20, %21
br i1 %22, label %23, label %25
23: ; preds = %18
%24 = tail call i32 @fclose(i32* %3)
br label %25
25: ; preds = %18, %12, %9, %5, %2, %23
%26 = phi i8* [ %16, %23 ], [ null, %2 ], [ null, %5 ], [ null, %9 ], [ null, %12 ], [ null, %18 ]
ret i8* %26
}