#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 fread(char *, int, long, int /*<<< orphan*/ *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
long ftell(int /*<<< orphan*/ *);
char *malloc(long);
char *slurp(const char *path) {
  FILE *file;
  char *buf;
  long len;
  file = fopen(path, "r");
  if (!file)
    return NULL;
  fseek(file, 0, SEEK_END);
  len = ftell(file);
  fseek(file, 0, SEEK_SET);
  buf = malloc(len + 1);
  if (!buf)
    return NULL;
  int st = fread(buf, 1, len, file);
  (void)st;
  buf[len] = '\0';
  fclose(file);
  return buf;
}


x86 assembly (clang, -O0):
<slurp>:
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,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
jne    1198 <slurp+0x38>
movq   $0x0,-0x8(%rbp)
jmp    122c <slurp+0xcc>
mov    -0x18(%rbp),%rdi
mov    0x2e45(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
mov    -0x18(%rbp),%rdi
call   1050 <ftell@plt>
mov    %rax,-0x28(%rbp)
mov    -0x18(%rbp),%rdi
mov    0x2e14(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1070 <fseek@plt>
mov    -0x28(%rbp),%rdi
add    $0x1,%rdi
call   1060 <malloc@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
jne    11f6 <slurp+0x96>
movq   $0x0,-0x8(%rbp)
jmp    122c <slurp+0xcc>
mov    -0x20(%rbp),%rdi
mov    -0x28(%rbp),%rdx
mov    -0x18(%rbp),%rcx
mov    $0x1,%esi
call   1030 <fread@plt>
mov    %eax,-0x2c(%rbp)
mov    -0x20(%rbp),%rax
mov    -0x28(%rbp),%rcx
movb   $0x0,(%rax,%rcx,1)
mov    -0x18(%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):
<slurp>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
lea    0xe91(%rip),%rsi
call   1080 <fopen@plt>
test   %rax,%rax
je     11e6 <slurp+0x86>
mov    %rax,%rbx
mov    0x2e65(%rip),%rax
mov    (%rax),%edx
xor    %r14d,%r14d
mov    %rbx,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
mov    %rbx,%rdi
call   1050 <ftell@plt>
mov    %rax,%r15
mov    0x2e34(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1070 <fseek@plt>
lea    0x1(%r15),%rdi
call   1060 <malloc@plt>
test   %rax,%rax
je     11e9 <slurp+0x89>
mov    %rax,%r12
mov    %rax,%rdi
mov    $0x1,%esi
mov    %r15,%rdx
mov    %rbx,%rcx
call   1030 <fread@plt>
movb   $0x0,(%r12,%r15,1)
mov    %rbx,%rdi
call   1040 <fclose@plt>
mov    %r12,%r14
jmp    11e9 <slurp+0x89>
xor    %r14d,%r14d
mov    %r14,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r12
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* @slurp(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i32*
%5 = alloca i8*
%6 = alloca i64
%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 %40
13: ; preds = %1
%14 = load i32*, i32** %4
%15 = load i32, i32* @SEEK_END
%16 = call i32 @fseek(i32* %14, i32 0, i32 %15)
%17 = load i32*, i32** %4
%18 = call i64 @ftell(i32* %17)
store i64 %18, i64* %6
%19 = load i32*, i32** %4
%20 = load i32, i32* @SEEK_SET
%21 = call i32 @fseek(i32* %19, i32 0, i32 %20)
%22 = load i64, i64* %6
%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 %28, label %27
27: ; preds = %13
store i8* null, i8** %2
br label %40
28: ; preds = %13
%29 = load i8*, i8** %5
%30 = load i64, i64* %6
%31 = load i32*, i32** %4
%32 = call i32 @fread(i8* %29, i32 1, i64 %30, i32* %31)
store i32 %32, i32* %7
%33 = load i32, i32* %7
%34 = load i8*, i8** %5
%35 = load i64, i64* %6
%36 = getelementptr inbounds i8, i8* %34, i64 %35
store i8 0, i8* %36
%37 = load i32*, i32** %4
%38 = call i32 @fclose(i32* %37)
%39 = load i8*, i8** %5
store i8* %39, i8** %2
br label %40
40: ; preds = %28, %27, %12
%41 = load i8*, i8** %2
ret i8* %41
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
define noalias i8* @slurp(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 %17, 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 = add nsw i64 %7, 1
%11 = tail call i8* @malloc(i64 %10)
%12 = icmp eq i8* %11, null
br i1 %12, label %17, label %13
13: ; preds = %4
%14 = tail call i32 @fread(i8* %11, i32 1, i64 %7, i32* %2)
%15 = getelementptr inbounds i8, i8* %11, i64 %7
store i8 0, i8* %15
%16 = tail call i32 @fclose(i32* %2)
br label %17
17: ; preds = %4, %1, %13
%18 = phi i8* [ %11, %13 ], [ null, %1 ], [ null, %4 ]
ret i8* %18
}