#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*/ exit(int /*<<< orphan*/);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char const *, char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *);
size_t fread(char *, size_t, int, int /*<<< orphan*/ *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
size_t ftell(int /*<<< orphan*/ *);
char *malloc(size_t);
int /*<<< orphan*/ stderr;
char *load_program_source(const char *s) {
  char *t;
  size_t len;
  FILE *f = fopen(s, "r");
  if (NULL == f) {
    fprintf(stderr, "couldn't open file");
    exit(0);
  }
  fseek(f, 0, SEEK_END);
  len = ftell(f);
  fseek(f, 0, SEEK_SET);
  t = malloc(len + 1);
  size_t bb = fread(t, len, 1, f);
  t[len] = 0;
  fclose(f);
  return t;
}


x86 assembly (clang, -O0):
<load_program_source>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xe69(%rip),%rsi
call   1090 <fopen@plt>
mov    %rax,-0x20(%rbp)
xor    %eax,%eax
cmp    -0x20(%rbp),%rax
jne    11c8 <load_program_source+0x48>
mov    0x2e25(%rip),%rax
mov    (%rax),%edi
lea    0xe46(%rip),%rsi
call   1050 <fprintf@plt>
xor    %edi,%edi
call   10a0 <exit@plt>
mov    -0x20(%rbp),%rdi
mov    0x2e15(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1080 <fseek@plt>
mov    -0x20(%rbp),%rdi
call   1060 <ftell@plt>
mov    %rax,-0x18(%rbp)
mov    -0x20(%rbp),%rdi
mov    0x2ddc(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1080 <fseek@plt>
mov    -0x18(%rbp),%rdi
add    $0x1,%rdi
call   1070 <malloc@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
mov    -0x18(%rbp),%rsi
mov    -0x20(%rbp),%rcx
mov    $0x1,%edx
call   1030 <fread@plt>
mov    %rax,-0x28(%rbp)
mov    -0x10(%rbp),%rax
mov    -0x18(%rbp),%rcx
movb   $0x0,(%rax,%rcx,1)
mov    -0x20(%rbp),%rdi
call   1040 <fclose@plt>
mov    -0x10(%rbp),%rax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<load_program_source>:
push   %r15
push   %r14
push   %rbx
lea    0xe74(%rip),%rsi
call   1090 <fopen@plt>
test   %rax,%rax
je     11ff <load_program_source+0x7f>
mov    %rax,%r15
mov    0x2e48(%rip),%rax
mov    (%rax),%edx
mov    %r15,%rdi
xor    %esi,%esi
call   1080 <fseek@plt>
mov    %r15,%rdi
call   1060 <ftell@plt>
mov    %rax,%r14
mov    0x2e12(%rip),%rax
mov    (%rax),%edx
mov    %r15,%rdi
xor    %esi,%esi
call   1080 <fseek@plt>
lea    0x1(%r14),%rdi
call   1070 <malloc@plt>
mov    %rax,%rbx
mov    %rax,%rdi
mov    %r14,%rsi
mov    $0x1,%edx
mov    %r15,%rcx
call   1030 <fread@plt>
movb   $0x0,(%rbx,%r14,1)
mov    %r15,%rdi
call   1040 <fclose@plt>
mov    %rbx,%rax
pop    %rbx
pop    %r14
pop    %r15
ret
mov    0x2dd2(%rip),%rax
mov    (%rax),%edi
lea    0xdf3(%rip),%rsi
call   1050 <fprintf@plt>
xor    %edi,%edi
call   10a0 <exit@plt>

LLVM IR (-O0):
@.str = [2 x i8] c"r\00"
@stderr = global i32 0
@.str.1 = [19 x i8] c"couldn't open file\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
define i8* @load_program_source(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i64
%5 = alloca i32*
%6 = alloca i64
store i8* %0, i8** %2
%7 = load i8*, i8** %2
%8 = call i32* @fopen(i8* %7, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %8, i32** %5
%9 = load i32*, i32** %5
%10 = icmp eq i32* null, %9
br i1 %10, label %11, label %15
11: ; preds = %1
%12 = load i32, i32* @stderr
%13 = call i32 @fprintf(i32 %12, i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.1, i64 0, i64 0))
%14 = call i32 @exit(i32 0)
unreachable
15: ; preds = %1
%16 = load i32*, i32** %5
%17 = load i32, i32* @SEEK_END
%18 = call i32 @fseek(i32* %16, i32 0, i32 %17)
%19 = load i32*, i32** %5
%20 = call i64 @ftell(i32* %19)
store i64 %20, i64* %4
%21 = load i32*, i32** %5
%22 = load i32, i32* @SEEK_SET
%23 = call i32 @fseek(i32* %21, i32 0, i32 %22)
%24 = load i64, i64* %4
%25 = add i64 %24, 1
%26 = call i8* @malloc(i64 %25)
store i8* %26, i8** %3
%27 = load i8*, i8** %3
%28 = load i64, i64* %4
%29 = load i32*, i32** %5
%30 = call i64 @fread(i8* %27, i64 %28, i32 1, i32* %29)
store i64 %30, i64* %6
%31 = load i8*, i8** %3
%32 = load i64, i64* %4
%33 = getelementptr inbounds i8, i8* %31, i64 %32
store i8 0, i8* %33
%34 = load i32*, i32** %5
%35 = call i32 @fclose(i32* %34)
%36 = load i8*, i8** %3
ret i8* %36
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@stderr = global i32 0
@.str.1 = [19 x i8] c"couldn't open file\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
define noalias i8* @load_program_source(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 %8
4: ; preds = %1
%5 = load i32, i32* @stderr
%6 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.1, i64 0, i64 0))
%7 = tail call i32 @exit(i32 0)
unreachable
8: ; preds = %1
%9 = load i32, i32* @SEEK_END
%10 = tail call i32 @fseek(i32* %2, i32 0, i32 %9)
%11 = tail call i64 @ftell(i32* %2)
%12 = load i32, i32* @SEEK_SET
%13 = tail call i32 @fseek(i32* %2, i32 0, i32 %12)
%14 = add i64 %11, 1
%15 = tail call i8* @malloc(i64 %14)
%16 = tail call i64 @fread(i8* %15, i64 %11, i32 1, i32* %2)
%17 = getelementptr inbounds i8, i8* %15, i64 %11
store i8 0, i8* %17
%18 = tail call i32 @fclose(i32* %2)
ret i8* %15
}