#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*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
int ftell(int /*<<< orphan*/ *);
int get_filesize(const char *filename) {
  FILE *f;
  int size = 0;
  f = fopen(filename, "rb");
  if (f) {
    fseek(f, 0, SEEK_END);
    size = ftell(f);
    fclose(f);
  }
  return size;
}


x86 assembly (clang, -O0):
<get_filesize>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
movl   $0x0,-0x14(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xea2(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x10(%rbp)
cmpq   $0x0,-0x10(%rbp)
je     119b <get_filesize+0x5b>
mov    -0x10(%rbp),%rdi
mov    0x2e6b(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1050 <fseek@plt>
mov    -0x10(%rbp),%rdi
call   1040 <ftell@plt>
mov    %eax,-0x14(%rbp)
mov    -0x10(%rbp),%rdi
call   1030 <fclose@plt>
mov    -0x14(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<get_filesize>:
push   %rbp
push   %rbx
push   %rax
lea    0xeb6(%rip),%rsi
call   1060 <fopen@plt>
test   %rax,%rax
je     1180 <get_filesize+0x40>
mov    %rax,%rbx
mov    0x2e8a(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1050 <fseek@plt>
mov    %rbx,%rdi
call   1040 <ftell@plt>
mov    %eax,%ebp
mov    %rbx,%rdi
call   1030 <fclose@plt>
mov    %ebp,%eax
jmp    1182 <get_filesize+0x42>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [3 x i8] c"rb\00"
@SEEK_END = global i32 0
define i32 @get_filesize(i8* %0) {
%2 = alloca i8*
%3 = alloca i32*
%4 = alloca i32
store i8* %0, i8** %2
store i32 0, i32* %4
%5 = load i8*, i8** %2
%6 = call i32* @fopen(i8* %5, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32* %6, i32** %3
%7 = load i32*, i32** %3
%8 = icmp ne i32* %7, null
br i1 %8, label %9, label %17
9: ; preds = %1
%10 = load i32*, i32** %3
%11 = load i32, i32* @SEEK_END
%12 = call i32 @fseek(i32* %10, i32 0, i32 %11)
%13 = load i32*, i32** %3
%14 = call i32 @ftell(i32* %13)
store i32 %14, i32* %4
%15 = load i32*, i32** %3
%16 = call i32 @fclose(i32* %15)
br label %17
17: ; preds = %9, %1
%18 = load i32, i32* %4
ret i32 %18
}

LLVM IR (-O2):
@.str = [3 x i8] c"rb\00"
@SEEK_END = global i32 0
define i32 @get_filesize(i8* nocapture %0) {
%2 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%3 = icmp eq i32* %2, null
br i1 %3, label %9, 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 i32 @ftell(i32* %2)
%8 = tail call i32 @fclose(i32* %2)
br label %9
9: ; preds = %4, %1
%10 = phi i32 [ %7, %4 ], [ 0, %1 ]
ret i32 %10
}