#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;
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
size_t fread(char *, int, size_t, int /*<<< orphan*/ *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, long, int /*<<< orphan*/);
size_t ftell(int /*<<< orphan*/ *);
int /*<<< orphan*/ printf(char *, char *);
scalar_t__ xxmalloc(size_t);
char *file_to_mem(char *name) {
  FILE *infile;
  size_t numbytes;
  char *buffer;
  infile = fopen(name, "r");
  if (infile == NULL) {
    printf("Error opening file '%s'\n", name);
    return NULL;
  }
  fseek(infile, 0L, SEEK_END);
  numbytes = ftell(infile);
  fseek(infile, 0L, SEEK_SET);
  buffer = (char *)xxmalloc((numbytes + 1) * sizeof(char));
  if (buffer == NULL) {
    printf("Error reading file '%s'\n", name);
    return NULL;
  }
  if (fread(buffer, sizeof(char), numbytes, infile) != numbytes) {
    printf("Error reading file '%s'\n", name);
    return NULL;
  }
  fclose(infile);
  *(buffer + numbytes) = '\0';
  return (buffer);
}


x86 assembly (clang, -O0):
<file_to_mem>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe79(%rip),%rsi
call   1090 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
jne    11b8 <file_to_mem+0x48>
mov    -0x10(%rbp),%rsi
lea    0xe5c(%rip),%rdi
call   1050 <printf@plt>
movq   $0x0,-0x8(%rbp)
jmp    1288 <file_to_mem+0x118>
mov    -0x18(%rbp),%rdi
mov    0x2e25(%rip),%rax
mov    (%rax),%edx
xor    %eax,%eax
mov    %eax,%esi
call   1080 <fseek@plt>
mov    -0x18(%rbp),%rdi
call   1070 <ftell@plt>
mov    %rax,-0x20(%rbp)
mov    -0x18(%rbp),%rdi
mov    0x2df2(%rip),%rax
mov    (%rax),%edx
xor    %eax,%eax
mov    %eax,%esi
call   1080 <fseek@plt>
mov    -0x20(%rbp),%rdi
add    $0x1,%rdi
shl    $0x0,%rdi
call   1060 <xxmalloc@plt>
mov    %rax,-0x28(%rbp)
cmpq   $0x0,-0x28(%rbp)
jne    122e <file_to_mem+0xbe>
mov    -0x10(%rbp),%rsi
lea    0xdff(%rip),%rdi
call   1050 <printf@plt>
movq   $0x0,-0x8(%rbp)
jmp    1288 <file_to_mem+0x118>
mov    -0x28(%rbp),%rdi
mov    -0x20(%rbp),%rdx
mov    -0x18(%rbp),%rcx
mov    $0x1,%esi
call   1030 <fread@plt>
cmp    -0x20(%rbp),%rax
je     126b <file_to_mem+0xfb>
mov    -0x10(%rbp),%rsi
lea    0xdc2(%rip),%rdi
call   1050 <printf@plt>
movq   $0x0,-0x8(%rbp)
jmp    1288 <file_to_mem+0x118>
mov    -0x18(%rbp),%rdi
call   1040 <fclose@plt>
mov    -0x28(%rbp),%rax
mov    -0x20(%rbp),%rcx
movb   $0x0,(%rax,%rcx,1)
mov    -0x28(%rbp),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<file_to_mem>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
mov    %rdi,%r14
lea    0xe7e(%rip),%rsi
call   1090 <fopen@plt>
test   %rax,%rax
je     1202 <file_to_mem+0x92>
mov    %rax,%r15
mov    0x2e52(%rip),%rax
mov    (%rax),%edx
mov    %r15,%rdi
xor    %esi,%esi
call   1080 <fseek@plt>
mov    %r15,%rdi
call   1070 <ftell@plt>
mov    %rax,%r12
mov    0x2e24(%rip),%rax
mov    (%rax),%edx
mov    %r15,%rdi
xor    %esi,%esi
call   1080 <fseek@plt>
lea    0x1(%r12),%rdi
call   1060 <xxmalloc@plt>
test   %rax,%rax
je     11f9 <file_to_mem+0x89>
mov    %rax,%rbx
mov    %rax,%rdi
mov    $0x1,%esi
mov    %r12,%rdx
mov    %r15,%rcx
call   1030 <fread@plt>
cmp    %r12,%rax
jne    11f9 <file_to_mem+0x89>
mov    %r15,%rdi
call   1040 <fclose@plt>
movb   $0x0,(%rbx,%r12,1)
jmp    1213 <file_to_mem+0xa3>
lea    0xe1b(%rip),%rdi
jmp    1209 <file_to_mem+0x99>
lea    0xdf9(%rip),%rdi
mov    %r14,%rsi
call   1050 <printf@plt>
xor    %ebx,%ebx
mov    %rbx,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [2 x i8] c"r\00"
@.str.1 = [25 x i8] c"Error opening file '%s'\0A\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
@.str.2 = [25 x i8] c"Error reading file '%s'\0A\00"
define i8* @file_to_mem(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i32*
%5 = alloca i64
%6 = alloca i8*
store i8* %0, i8** %3
%7 = load i8*, i8** %3
%8 = call i32* @fopen(i8* %7, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %8, i32** %4
%9 = load i32*, i32** %4
%10 = icmp eq i32* %9, null
br i1 %10, label %11, label %14
11: ; preds = %1
%12 = load i8*, i8** %3
%13 = call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.1, i64 0, i64 0), i8* %12)
store i8* null, i8** %2
br label %50
14: ; preds = %1
%15 = load i32*, i32** %4
%16 = load i32, i32* @SEEK_END
%17 = call i32 @fseek(i32* %15, i64 0, i32 %16)
%18 = load i32*, i32** %4
%19 = call i64 @ftell(i32* %18)
store i64 %19, i64* %5
%20 = load i32*, i32** %4
%21 = load i32, i32* @SEEK_SET
%22 = call i32 @fseek(i32* %20, i64 0, i32 %21)
%23 = load i64, i64* %5
%24 = add i64 %23, 1
%25 = mul i64 %24, 1
%26 = call i64 @xxmalloc(i64 %25)
%27 = inttoptr i64 %26 to i8*
store i8* %27, i8** %6
%28 = load i8*, i8** %6
%29 = icmp eq i8* %28, null
br i1 %29, label %30, label %33
30: ; preds = %14
%31 = load i8*, i8** %3
%32 = call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0), i8* %31)
store i8* null, i8** %2
br label %50
33: ; preds = %14
%34 = load i8*, i8** %6
%35 = load i64, i64* %5
%36 = load i32*, i32** %4
%37 = call i64 @fread(i8* %34, i32 1, i64 %35, i32* %36)
%38 = load i64, i64* %5
%39 = icmp ne i64 %37, %38
br i1 %39, label %40, label %43
40: ; preds = %33
%41 = load i8*, i8** %3
%42 = call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0), i8* %41)
store i8* null, i8** %2
br label %50
43: ; preds = %33
%44 = load i32*, i32** %4
%45 = call i32 @fclose(i32* %44)
%46 = load i8*, i8** %6
%47 = load i64, i64* %5
%48 = getelementptr inbounds i8, i8* %46, i64 %47
store i8 0, i8* %48
%49 = load i8*, i8** %6
store i8* %49, i8** %2
br label %50
50: ; preds = %43, %40, %30, %11
%51 = load i8*, i8** %2
ret i8* %51
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@.str.1 = [25 x i8] c"Error opening file '%s'\0A\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
@.str.2 = [25 x i8] c"Error reading file '%s'\0A\00"
define i8* @file_to_mem(i8* %0) {
%2 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%3 = icmp eq i32* %2, null
br i1 %3, label %4, label %6
4: ; preds = %1
%5 = tail call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.1, i64 0, i64 0), i8* %0)
br label %26
6: ; preds = %1
%7 = load i32, i32* @SEEK_END
%8 = tail call i32 @fseek(i32* %2, i64 0, i32 %7)
%9 = tail call i64 @ftell(i32* %2)
%10 = load i32, i32* @SEEK_SET
%11 = tail call i32 @fseek(i32* %2, i64 0, i32 %10)
%12 = add i64 %9, 1
%13 = tail call i64 @xxmalloc(i64 %12)
%14 = inttoptr i64 %13 to i8*
%15 = icmp eq i64 %13, 0
br i1 %15, label %16, label %18
16: ; preds = %6
%17 = tail call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0), i8* %0)
br label %26
18: ; preds = %6
%19 = tail call i64 @fread(i8* %14, i32 1, i64 %9, i32* %2)
%20 = icmp eq i64 %19, %9
br i1 %20, label %23, label %21
21: ; preds = %18
%22 = tail call i32 @printf(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.2, i64 0, i64 0), i8* %0)
br label %26
23: ; preds = %18
%24 = tail call i32 @fclose(i32* %2)
%25 = getelementptr inbounds i8, i8* %14, i64 %9
store i8 0, i8* %25
br label %26
26: ; preds = %23, %21, %16, %4
%27 = phi i8* [ null, %4 ], [ null, %16 ], [ null, %21 ], [ %14, %23 ]
ret i8* %27
}