#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;
char *calloc(long, int);
int /*<<< orphan*/ err_msg(int /*<<< orphan*/);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char const *, char *);
long fread(char *, int, long, int /*<<< orphan*/ *);
int fseek(int /*<<< orphan*/ *, int /*<<< orphan*/, int /*<<< orphan*/);
long ftell(int /*<<< orphan*/ *);
int /*<<< orphan*/ rewind(int /*<<< orphan*/ *);
int /*<<< orphan*/ sys_msg();
char *loadfile(const char *filename) {
  FILE *file = fopen(filename, "r");
  if (file == NULL) {
    err_msg(sys_msg());
    goto err_0;
  }
  if (fseek(file, 0, SEEK_END) == -1) {
    err_msg(sys_msg());
    goto err_1;
  }
  long size = ftell(file);
  rewind(file);
  char *foo = calloc(size + 1, 1);
  if (foo == NULL) {
    err_msg(sys_msg());
    goto err_1;
  }
  if (fread(foo, 1, size, file) != size) {
    err_msg(sys_msg());
    goto err_1;
  }
  foo[size] = '\0';
  fclose(file);
  return foo;
err_1:
  fclose(file);
err_0:
  return NULL;
}


x86 assembly (clang, -O0):
<loadfile>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe59(%rip),%rsi
call   10a0 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
jne    11ce <loadfile+0x3e>
mov    $0x0,%al
call   1080 <sys_msg@plt>
mov    %eax,%edi
call   10b0 <err_msg@plt>
jmp    12a6 <loadfile+0x116>
mov    -0x18(%rbp),%rdi
mov    0x2e0f(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1090 <fseek@plt>
cmp    $0xffffffff,%eax
jne    11fe <loadfile+0x6e>
mov    $0x0,%al
call   1080 <sys_msg@plt>
mov    %eax,%edi
call   10b0 <err_msg@plt>
jmp    129d <loadfile+0x10d>
mov    -0x18(%rbp),%rdi
call   1070 <ftell@plt>
mov    %rax,-0x20(%rbp)
mov    -0x18(%rbp),%rdi
call   1050 <rewind@plt>
mov    -0x20(%rbp),%rdi
add    $0x1,%rdi
mov    $0x1,%esi
call   1060 <calloc@plt>
mov    %rax,-0x28(%rbp)
cmpq   $0x0,-0x28(%rbp)
jne    1248 <loadfile+0xb8>
mov    $0x0,%al
call   1080 <sys_msg@plt>
mov    %eax,%edi
call   10b0 <err_msg@plt>
jmp    129d <loadfile+0x10d>
mov    -0x28(%rbp),%rdi
mov    -0x20(%rbp),%rdx
mov    -0x18(%rbp),%rcx
mov    $0x1,%esi
call   1030 <fread@plt>
cmp    -0x20(%rbp),%rax
je     127b <loadfile+0xeb>
mov    $0x0,%al
call   1080 <sys_msg@plt>
mov    %eax,%edi
call   10b0 <err_msg@plt>
jmp    129d <loadfile+0x10d>
mov    -0x28(%rbp),%rax
mov    -0x20(%rbp),%rcx
movb   $0x0,(%rax,%rcx,1)
mov    -0x18(%rbp),%rdi
call   1040 <fclose@plt>
mov    -0x28(%rbp),%rax
mov    %rax,-0x8(%rbp)
jmp    12ae <loadfile+0x11e>
mov    -0x18(%rbp),%rdi
call   1040 <fclose@plt>
movq   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<loadfile>:
push   %r15
push   %r14
push   %rbx
lea    0xe64(%rip),%rsi
call   10a0 <fopen@plt>
test   %rax,%rax
je     1224 <loadfile+0x94>
mov    %rax,%rbx
mov    0x2e38(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1090 <fseek@plt>
cmp    $0xffffffff,%eax
je     1209 <loadfile+0x79>
mov    %rbx,%rdi
call   1070 <ftell@plt>
mov    %rax,%r15
mov    %rbx,%rdi
call   1050 <rewind@plt>
lea    0x1(%r15),%rdi
mov    $0x1,%esi
call   1060 <calloc@plt>
test   %rax,%rax
je     1209 <loadfile+0x79>
mov    %rax,%r14
mov    %rax,%rdi
mov    $0x1,%esi
mov    %r15,%rdx
mov    %rbx,%rcx
call   1030 <fread@plt>
cmp    %r15,%rax
jne    1209 <loadfile+0x79>
movb   $0x0,(%r14,%r15,1)
jmp    121a <loadfile+0x8a>
xor    %r14d,%r14d
xor    %eax,%eax
call   1080 <sys_msg@plt>
mov    %eax,%edi
call   10b0 <err_msg@plt>
mov    %rbx,%rdi
call   1040 <fclose@plt>
jmp    1235 <loadfile+0xa5>
xor    %r14d,%r14d
xor    %eax,%eax
call   1080 <sys_msg@plt>
mov    %eax,%edi
call   10b0 <err_msg@plt>
mov    %r14,%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* @loadfile(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 = call i32 (...) @sys_msg()
%13 = call i32 @err_msg(i32 %12)
br label %55
14: ; preds = %1
%15 = load i32*, i32** %4
%16 = load i32, i32* @SEEK_END
%17 = call i32 @fseek(i32* %15, i32 0, i32 %16)
%18 = icmp eq i32 %17, -1
br i1 %18, label %19, label %22
19: ; preds = %14
%20 = call i32 (...) @sys_msg()
%21 = call i32 @err_msg(i32 %20)
br label %52
22: ; preds = %14
%23 = load i32*, i32** %4
%24 = call i64 @ftell(i32* %23)
store i64 %24, i64* %5
%25 = load i32*, i32** %4
%26 = call i32 @rewind(i32* %25)
%27 = load i64, i64* %5
%28 = add nsw i64 %27, 1
%29 = call i8* @calloc(i64 %28, i32 1)
store i8* %29, i8** %6
%30 = load i8*, i8** %6
%31 = icmp eq i8* %30, null
br i1 %31, label %32, label %35
32: ; preds = %22
%33 = call i32 (...) @sys_msg()
%34 = call i32 @err_msg(i32 %33)
br label %52
35: ; preds = %22
%36 = load i8*, i8** %6
%37 = load i64, i64* %5
%38 = load i32*, i32** %4
%39 = call i64 @fread(i8* %36, i32 1, i64 %37, i32* %38)
%40 = load i64, i64* %5
%41 = icmp ne i64 %39, %40
br i1 %41, label %42, label %45
42: ; preds = %35
%43 = call i32 (...) @sys_msg()
%44 = call i32 @err_msg(i32 %43)
br label %52
45: ; preds = %35
%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 i32*, i32** %4
%50 = call i32 @fclose(i32* %49)
%51 = load i8*, i8** %6
store i8* %51, i8** %2
br label %56
52: ; preds = %42, %32, %19
%53 = load i32*, i32** %4
%54 = call i32 @fclose(i32* %53)
br label %55
55: ; preds = %52, %11
store i8* null, i8** %2
br label %56
56: ; preds = %55, %45
%57 = load i8*, i8** %2
ret i8* %57
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@SEEK_END = global i32 0
define i8* @loadfile(i8* nocapture %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 %7
4: ; preds = %1
%5 = tail call i32 (...) @sys_msg()
%6 = tail call i32 @err_msg(i32 %5)
br label %27
7: ; preds = %1
%8 = load i32, i32* @SEEK_END
%9 = tail call i32 @fseek(i32* %2, i32 0, i32 %8)
%10 = icmp eq i32 %9, -1
br i1 %10, label %23, label %11
11: ; preds = %7
%12 = tail call i64 @ftell(i32* %2)
%13 = tail call i32 @rewind(i32* %2)
%14 = add nsw i64 %12, 1
%15 = tail call i8* @calloc(i64 %14, i32 1)
%16 = icmp eq i8* %15, null
br i1 %16, label %23, label %17
17: ; preds = %11
%18 = tail call i64 @fread(i8* %15, i32 1, i64 %12, i32* %2)
%19 = icmp eq i64 %18, %12
br i1 %19, label %20, label %23
20: ; preds = %17
%21 = getelementptr inbounds i8, i8* %15, i64 %12
store i8 0, i8* %21
%22 = tail call i32 @fclose(i32* %2)
br label %27
23: ; preds = %17, %11, %7
%24 = tail call i32 (...) @sys_msg()
%25 = tail call i32 @err_msg(i32 %24)
%26 = tail call i32 @fclose(i32* %2)
br label %27
27: ; preds = %4, %23, %20
%28 = phi i8* [ %15, %20 ], [ null, %23 ], [ null, %4 ]
ret i8* %28
}