#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 *);
int /*<<< orphan*/ fread(char *, int, long, int /*<<< orphan*/ *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
long ftell(int /*<<< orphan*/ *);
char *malloc(long);
char *get_file_content(char const *filename) {
  char *buffer;
  FILE *file = fopen(filename, "r");
  if (!file) {
    return NULL;
  }
  fseek(file, 0, SEEK_END);
  long length;
  length = ftell(file);
  fseek(file, 0, SEEK_SET);
  buffer = malloc(length);
  if (buffer) {
    fread(buffer, 1, length, file);
  }
  fclose(file);
  if (buffer) {
    return buffer;
  } else {
    return NULL;
  }
}


x86 assembly (clang, -O0):
<get_file_content>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe89(%rip),%rsi
call   1080 <fopen@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
jne    1198 <get_file_content+0x38>
movq   $0x0,-0x8(%rbp)
jmp    1224 <get_file_content+0xc4>
mov    -0x20(%rbp),%rdi
mov    0x2e45(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
mov    -0x20(%rbp),%rdi
call   1050 <ftell@plt>
mov    %rax,-0x28(%rbp)
mov    -0x20(%rbp),%rdi
mov    0x2e14(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
mov    -0x28(%rbp),%rdi
call   1060 <malloc@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
je     11fb <get_file_content+0x9b>
mov    -0x18(%rbp),%rdi
mov    -0x28(%rbp),%rdx
mov    -0x20(%rbp),%rcx
mov    $0x1,%esi
call   1030 <fread@plt>
mov    -0x20(%rbp),%rdi
call   1040 <fclose@plt>
cmpq   $0x0,-0x18(%rbp)
je     121c <get_file_content+0xbc>
mov    -0x18(%rbp),%rax
mov    %rax,-0x8(%rbp)
jmp    1224 <get_file_content+0xc4>
movq   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<get_file_content>:
push   %r15
push   %r14
push   %rbx
lea    0xe94(%rip),%rsi
call   1080 <fopen@plt>
test   %rax,%rax
je     11d7 <get_file_content+0x77>
mov    %rax,%rbx
mov    0x2e68(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
mov    %rbx,%rdi
call   1050 <ftell@plt>
mov    %rax,%r15
mov    0x2e3a(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
mov    %r15,%rdi
call   1060 <malloc@plt>
mov    %rax,%r14
test   %rax,%rax
je     11cd <get_file_content+0x6d>
mov    %r14,%rdi
mov    $0x1,%esi
mov    %r15,%rdx
mov    %rbx,%rcx
call   1030 <fread@plt>
mov    %rbx,%rdi
call   1040 <fclose@plt>
jmp    11da <get_file_content+0x7a>
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
@SEEK_SET = global i32 0
define i8* @get_file_content(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i32*
%6 = alloca i64
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** %5
%9 = load i32*, i32** %5
%10 = icmp ne i32* %9, null
br i1 %10, label %12, label %11
11: ; preds = %1
store i8* null, i8** %2
br label %38
12: ; preds = %1
%13 = load i32*, i32** %5
%14 = load i32, i32* @SEEK_END
%15 = call i32 @fseek(i32* %13, i32 0, i32 %14)
%16 = load i32*, i32** %5
%17 = call i64 @ftell(i32* %16)
store i64 %17, i64* %6
%18 = load i32*, i32** %5
%19 = load i32, i32* @SEEK_SET
%20 = call i32 @fseek(i32* %18, i32 0, i32 %19)
%21 = load i64, i64* %6
%22 = call i8* @malloc(i64 %21)
store i8* %22, i8** %4
%23 = load i8*, i8** %4
%24 = icmp ne i8* %23, null
br i1 %24, label %25, label %30
25: ; preds = %12
%26 = load i8*, i8** %4
%27 = load i64, i64* %6
%28 = load i32*, i32** %5
%29 = call i32 @fread(i8* %26, i32 1, i64 %27, i32* %28)
br label %30
30: ; preds = %25, %12
%31 = load i32*, i32** %5
%32 = call i32 @fclose(i32* %31)
%33 = load i8*, i8** %4
%34 = icmp ne i8* %33, null
br i1 %34, label %35, label %37
35: ; preds = %30
%36 = load i8*, i8** %4
store i8* %36, i8** %2
br label %38
37: ; preds = %30
store i8* null, i8** %2
br label %38
38: ; preds = %37, %35, %11
%39 = load i8*, i8** %2
ret i8* %39
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
define noalias i8* @get_file_content(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 %16, label %4
4: ; preds = %1
%5 = load i32, i32* @SEEK_END
%6 = tail call i32 @fseek(i32* %2, i32 0, i32 %5)
%7 = tail call i64 @ftell(i32* %2)
%8 = load i32, i32* @SEEK_SET
%9 = tail call i32 @fseek(i32* %2, i32 0, i32 %8)
%10 = tail call i8* @malloc(i64 %7)
%11 = icmp eq i8* %10, null
br i1 %11, label %14, label %12
12: ; preds = %4
%13 = tail call i32 @fread(i8* %10, i32 1, i64 %7, i32* %2)
br label %14
14: ; preds = %12, %4
%15 = tail call i32 @fclose(i32* %2)
br label %16
16: ; preds = %1, %14
%17 = phi i8* [ %10, %14 ], [ null, %1 ]
ret i8* %17
}