#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 */

/* Variables and functions */
int /*<<< orphan*/ O_RDONLY;
int /*<<< orphan*/ close(int);
int open(char *, int /*<<< orphan*/, int /*<<< orphan*/);
int read(int, char *, unsigned int);
int read_memory(char *file, char *begin, unsigned size) {
  int handle, bytes;
  handle = open(file, O_RDONLY, 0);
  if (handle == -1)
    return 0;
  bytes = read(handle, begin, size);
  close(handle);
  if (bytes != size)
    return 0;
  return 1;
}


x86 assembly (clang, -O0):
<read_memory>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    %edx,-0x1c(%rbp)
mov    -0x10(%rbp),%rdi
mov    0x2e9a(%rip),%rax
mov    (%rax),%esi
xor    %edx,%edx
call   1050 <open@plt>
mov    %eax,-0x20(%rbp)
cmpl   $0xffffffff,-0x20(%rbp)
jne    1170 <read_memory+0x40>
movl   $0x0,-0x4(%rbp)
jmp    11a9 <read_memory+0x79>
mov    -0x20(%rbp),%edi
mov    -0x18(%rbp),%rsi
mov    -0x1c(%rbp),%edx
call   1040 <read@plt>
mov    %eax,-0x24(%rbp)
mov    -0x20(%rbp),%edi
call   1030 <close@plt>
mov    -0x24(%rbp),%eax
cmp    -0x1c(%rbp),%eax
je     11a2 <read_memory+0x72>
movl   $0x0,-0x4(%rbp)
jmp    11a9 <read_memory+0x79>
movl   $0x1,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<read_memory>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %edx,%r15d
mov    %rsi,%r14
mov    0x2ea4(%rip),%rax
mov    (%rax),%esi
xor    %ebp,%ebp
xor    %edx,%edx
call   1050 <open@plt>
cmp    $0xffffffff,%eax
je     1176 <read_memory+0x46>
mov    %eax,%ebx
mov    %eax,%edi
mov    %r14,%rsi
mov    %r15d,%edx
call   1040 <read@plt>
mov    %eax,%r14d
mov    %ebx,%edi
call   1030 <close@plt>
xor    %ebp,%ebp
cmp    %r15d,%r14d
sete   %bpl
mov    %ebp,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@O_RDONLY = global i32 0
define i32 @read_memory(i8* %0, i8* %1, i32 %2) {
%4 = alloca i32
%5 = alloca i8*
%6 = alloca i8*
%7 = alloca i32
%8 = alloca i32
%9 = alloca i32
store i8* %0, i8** %5
store i8* %1, i8** %6
store i32 %2, i32* %7
%10 = load i8*, i8** %5
%11 = load i32, i32* @O_RDONLY
%12 = call i32 @open(i8* %10, i32 %11, i32 0)
store i32 %12, i32* %8
%13 = load i32, i32* %8
%14 = icmp eq i32 %13, -1
br i1 %14, label %15, label %16
15: ; preds = %3
store i32 0, i32* %4
br label %28
16: ; preds = %3
%17 = load i32, i32* %8
%18 = load i8*, i8** %6
%19 = load i32, i32* %7
%20 = call i32 @read(i32 %17, i8* %18, i32 %19)
store i32 %20, i32* %9
%21 = load i32, i32* %8
%22 = call i32 @close(i32 %21)
%23 = load i32, i32* %9
%24 = load i32, i32* %7
%25 = icmp ne i32 %23, %24
br i1 %25, label %26, label %27
26: ; preds = %16
store i32 0, i32* %4
br label %28
27: ; preds = %16
store i32 1, i32* %4
br label %28
28: ; preds = %27, %26, %15
%29 = load i32, i32* %4
ret i32 %29
}

LLVM IR (-O2):
@O_RDONLY = global i32 0
define i32 @read_memory(i8* nocapture %0, i8* nocapture %1, i32 %2) {
%4 = load i32, i32* @O_RDONLY
%5 = tail call i32 @open(i8* %0, i32 %4, i32 0)
%6 = icmp eq i32 %5, -1
br i1 %6, label %12, label %7
7: ; preds = %3
%8 = tail call i32 @read(i32 %5, i8* %1, i32 %2)
%9 = tail call i32 @close(i32 %5)
%10 = icmp eq i32 %8, %2
%11 = zext i1 %10 to i32
br label %12
12: ; preds = %7, %3
%13 = phi i32 [ 0, %3 ], [ %11, %7 ]
ret i32 %13
}