#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 /*<<< orphan*/ fread(char *, long, int, int /*<<< orphan*/ *);
int /*<<< orphan*/ free(char *);
int fseek(int /*<<< orphan*/ *, int /*<<< orphan*/, int /*<<< orphan*/);
long ftell(int /*<<< orphan*/ *);
char *malloc(long);
int /*<<< orphan*/ rewind(int /*<<< orphan*/ *);
char *get_file(const char *filename) {
  FILE *fh;
  long fsize;
  char *blob;
  int ret;
  fh = fopen(filename, "r");
  if (!fh) {
    return NULL;
  }
  ret = fseek(fh, 0, SEEK_END);
  if (ret) {
    return NULL;
  }
  fsize = ftell(fh);
  if (fsize < 0) {
    return NULL;
  }
  blob = malloc(fsize + 1);
  if (!blob) {
    return NULL;
  }
  rewind(fh);
  if (!fread(blob, fsize, 1, fh)) {
    free(blob);
    return NULL;
  }
  fclose(fh);
  blob[fsize] = '\0';
  return blob;
}


x86 assembly (clang, -O0):
<get_file>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe69(%rip),%rsi
call   10a0 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
jne    11b8 <get_file+0x38>
movq   $0x0,-0x8(%rbp)
jmp    128f <get_file+0x10f>
mov    -0x18(%rbp),%rdi
mov    0x2e25(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1090 <fseek@plt>
mov    %eax,-0x2c(%rbp)
cmpl   $0x0,-0x2c(%rbp)
je     11e6 <get_file+0x66>
movq   $0x0,-0x8(%rbp)
jmp    128f <get_file+0x10f>
mov    -0x18(%rbp),%rdi
call   1070 <ftell@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
jge    120b <get_file+0x8b>
movq   $0x0,-0x8(%rbp)
jmp    128f <get_file+0x10f>
mov    -0x20(%rbp),%rdi
add    $0x1,%rdi
call   1080 <malloc@plt>
mov    %rax,-0x28(%rbp)
cmpq   $0x0,-0x28(%rbp)
jne    1234 <get_file+0xb4>
movq   $0x0,-0x8(%rbp)
jmp    128f <get_file+0x10f>
mov    -0x18(%rbp),%rdi
call   1060 <rewind@plt>
mov    -0x28(%rbp),%rdi
mov    -0x20(%rbp),%rsi
mov    -0x18(%rbp),%rcx
mov    $0x1,%edx
call   1040 <fread@plt>
cmp    $0x0,%eax
jne    1272 <get_file+0xf2>
mov    -0x28(%rbp),%rdi
call   1030 <free@plt>
movq   $0x0,-0x8(%rbp)
jmp    128f <get_file+0x10f>
mov    -0x18(%rbp),%rdi
call   1050 <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):
<get_file>:
push   %r15
push   %r14
push   %rbx
lea    0xe74(%rip),%rsi
call   10a0 <fopen@plt>
test   %rax,%rax
je     120a <get_file+0x8a>
mov    %rax,%rbx
mov    0x2e48(%rip),%rax
mov    (%rax),%edx
xor    %r14d,%r14d
mov    %rbx,%rdi
xor    %esi,%esi
call   1090 <fseek@plt>
test   %eax,%eax
jne    120d <get_file+0x8d>
mov    %rbx,%rdi
call   1070 <ftell@plt>
test   %rax,%rax
js     120a <get_file+0x8a>
mov    %rax,%r15
lea    0x1(%rax),%rdi
call   1080 <malloc@plt>
test   %rax,%rax
je     120a <get_file+0x8a>
mov    %rax,%r14
mov    %rbx,%rdi
call   1060 <rewind@plt>
mov    %r14,%rdi
mov    %r15,%rsi
mov    $0x1,%edx
mov    %rbx,%rcx
call   1040 <fread@plt>
test   %eax,%eax
je     1202 <get_file+0x82>
mov    %rbx,%rdi
call   1050 <fclose@plt>
movb   $0x0,(%r14,%r15,1)
jmp    120d <get_file+0x8d>
mov    %r14,%rdi
call   1030 <free@plt>
xor    %r14d,%r14d
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* @get_file(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i32*
%5 = alloca i64
%6 = alloca i8*
%7 = alloca i32
store i8* %0, i8** %3
%8 = load i8*, i8** %3
%9 = call i32* @fopen(i8* %8, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %9, i32** %4
%10 = load i32*, i32** %4
%11 = icmp ne i32* %10, null
br i1 %11, label %13, label %12
12: ; preds = %1
store i8* null, i8** %2
br label %51
13: ; preds = %1
%14 = load i32*, i32** %4
%15 = load i32, i32* @SEEK_END
%16 = call i32 @fseek(i32* %14, i32 0, i32 %15)
store i32 %16, i32* %7
%17 = load i32, i32* %7
%18 = icmp ne i32 %17, 0
br i1 %18, label %19, label %20
19: ; preds = %13
store i8* null, i8** %2
br label %51
20: ; preds = %13
%21 = load i32*, i32** %4
%22 = call i64 @ftell(i32* %21)
store i64 %22, i64* %5
%23 = load i64, i64* %5
%24 = icmp slt i64 %23, 0
br i1 %24, label %25, label %26
25: ; preds = %20
store i8* null, i8** %2
br label %51
26: ; preds = %20
%27 = load i64, i64* %5
%28 = add nsw i64 %27, 1
%29 = call i8* @malloc(i64 %28)
store i8* %29, i8** %6
%30 = load i8*, i8** %6
%31 = icmp ne i8* %30, null
br i1 %31, label %33, label %32
32: ; preds = %26
store i8* null, i8** %2
br label %51
33: ; preds = %26
%34 = load i32*, i32** %4
%35 = call i32 @rewind(i32* %34)
%36 = load i8*, i8** %6
%37 = load i64, i64* %5
%38 = load i32*, i32** %4
%39 = call i32 @fread(i8* %36, i64 %37, i32 1, i32* %38)
%40 = icmp ne i32 %39, 0
br i1 %40, label %44, label %41
41: ; preds = %33
%42 = load i8*, i8** %6
%43 = call i32 @free(i8* %42)
store i8* null, i8** %2
br label %51
44: ; preds = %33
%45 = load i32*, i32** %4
%46 = call i32 @fclose(i32* %45)
%47 = load i8*, i8** %6
%48 = load i64, i64* %5
%49 = getelementptr inbounds i8, i8* %47, i64 %48
store i8 0, i8* %49
%50 = load i8*, i8** %6
store i8* %50, i8** %2
br label %51
51: ; preds = %44, %41, %32, %25, %19, %12
%52 = load i8*, i8** %2
ret i8* %52
}

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