#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 const *, char *);
long fread(char *, int, long, int /*<<< orphan*/ *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
long ftell(int /*<<< orphan*/ *);
char *malloc(long);
int /*<<< orphan*/ perror(char *);
char *load_whole_file(const char *fname) {
  long len;
  char *buf;
  FILE *f = fopen(fname, "rt");
  if (!f) {
    perror("fopen");
    return NULL;
  }
  fseek(f, 0, SEEK_END);
  len = ftell(f);
  fseek(f, 0, SEEK_SET);
  buf = malloc(len + 1);
  if (!buf) {
    perror("malloc");
    fclose(f);
    return NULL;
  }
  len = fread(buf, 1, len, f);
  buf[len] = '\0';
  fclose(f);
  return buf;
}


x86 assembly (clang, -O0):
<load_whole_file>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe79(%rip),%rsi
call   1080 <fopen@plt>
mov    %rax,-0x28(%rbp)
cmpq   $0x0,-0x28(%rbp)
jne    11b4 <load_whole_file+0x44>
lea    0xe61(%rip),%rdi
call   1090 <perror@plt>
movq   $0x0,-0x8(%rbp)
jmp    125e <load_whole_file+0xee>
mov    -0x28(%rbp),%rdi
mov    0x2e29(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
mov    -0x28(%rbp),%rdi
call   1050 <ftell@plt>
mov    %rax,-0x18(%rbp)
mov    -0x28(%rbp),%rdi
mov    0x2df8(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
mov    -0x18(%rbp),%rdi
add    $0x1,%rdi
call   1060 <malloc@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
jne    1227 <load_whole_file+0xb7>
lea    0xdfd(%rip),%rdi
call   1090 <perror@plt>
mov    -0x28(%rbp),%rdi
call   1040 <fclose@plt>
movq   $0x0,-0x8(%rbp)
jmp    125e <load_whole_file+0xee>
mov    -0x20(%rbp),%rdi
mov    -0x18(%rbp),%rdx
mov    -0x28(%rbp),%rcx
mov    $0x1,%esi
call   1030 <fread@plt>
mov    %rax,-0x18(%rbp)
mov    -0x20(%rbp),%rax
mov    -0x18(%rbp),%rcx
movb   $0x0,(%rax,%rcx,1)
mov    -0x28(%rbp),%rdi
call   1040 <fclose@plt>
mov    -0x20(%rbp),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<load_whole_file>:
push   %r15
push   %r14
push   %rbx
lea    0xe84(%rip),%rsi
call   1080 <fopen@plt>
test   %rax,%rax
je     11f3 <load_whole_file+0x83>
mov    %rax,%r14
mov    0x2e58(%rip),%rax
mov    (%rax),%edx
mov    %r14,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
mov    %r14,%rdi
call   1050 <ftell@plt>
mov    %rax,%r15
mov    0x2e2a(%rip),%rax
mov    (%rax),%edx
mov    %r14,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
lea    0x1(%r15),%rdi
call   1060 <malloc@plt>
test   %rax,%rax
je     1203 <load_whole_file+0x93>
mov    %rax,%rbx
mov    %rax,%rdi
mov    $0x1,%esi
mov    %r15,%rdx
mov    %r14,%rcx
call   1030 <fread@plt>
movb   $0x0,(%rbx,%rax,1)
mov    %r14,%rdi
call   1040 <fclose@plt>
mov    %rbx,%rax
pop    %rbx
pop    %r14
pop    %r15
ret
lea    0xe09(%rip),%rdi
call   1090 <perror@plt>
xor    %ebx,%ebx
jmp    11ea <load_whole_file+0x7a>
lea    0xdff(%rip),%rdi
call   1090 <perror@plt>
mov    %r14,%rdi
call   1040 <fclose@plt>
xor    %ebx,%ebx
jmp    11ea <load_whole_file+0x7a>

LLVM IR (-O0):
@.str = [3 x i8] c"rt\00"
@.str.1 = [6 x i8] c"fopen\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
@.str.2 = [7 x i8] c"malloc\00"
define i8* @load_whole_file(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i64
%5 = alloca i8*
%6 = alloca i32*
store i8* %0, i8** %3
%7 = load i8*, i8** %3
%8 = call i32* @fopen(i8* %7, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32* %8, i32** %6
%9 = load i32*, i32** %6
%10 = icmp ne i32* %9, null
br i1 %10, label %13, label %11
11: ; preds = %1
%12 = call i32 @perror(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0))
store i8* null, i8** %2
br label %42
13: ; preds = %1
%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 i64 @ftell(i32* %17)
store i64 %18, i64* %4
%19 = load i32*, i32** %6
%20 = load i32, i32* @SEEK_SET
%21 = call i32 @fseek(i32* %19, i32 0, i32 %20)
%22 = load i64, i64* %4
%23 = add nsw i64 %22, 1
%24 = call i8* @malloc(i64 %23)
store i8* %24, i8** %5
%25 = load i8*, i8** %5
%26 = icmp ne i8* %25, null
br i1 %26, label %31, label %27
27: ; preds = %13
%28 = call i32 @perror(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.2, i64 0, i64 0))
%29 = load i32*, i32** %6
%30 = call i32 @fclose(i32* %29)
store i8* null, i8** %2
br label %42
31: ; preds = %13
%32 = load i8*, i8** %5
%33 = load i64, i64* %4
%34 = load i32*, i32** %6
%35 = call i64 @fread(i8* %32, i32 1, i64 %33, i32* %34)
store i64 %35, i64* %4
%36 = load i8*, i8** %5
%37 = load i64, i64* %4
%38 = getelementptr inbounds i8, i8* %36, i64 %37
store i8 0, i8* %38
%39 = load i32*, i32** %6
%40 = call i32 @fclose(i32* %39)
%41 = load i8*, i8** %5
store i8* %41, i8** %2
br label %42
42: ; preds = %31, %27, %11
%43 = load i8*, i8** %2
ret i8* %43
}

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