#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*/ uint8_t;
typedef int /*<<< orphan*/ FILE;

/* Variables and functions */
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char const *, char *);
int /*<<< orphan*/ fwrite(int /*<<< orphan*/ const *, int, int,
                          int /*<<< orphan*/ *);
int /*<<< orphan*/ perror(char const *);
void save_file(const char *filename, const uint8_t *buf, int buf_len) {
  FILE *f;
  f = fopen(filename, "wb");
  if (!f) {
    perror(filename);
    exit(1);
  }
  fwrite(buf, 1, buf_len, f);
  fclose(f);
}


x86 assembly (clang, -O0):
<save_file>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %edx,-0x14(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xe92(%rip),%rsi
call   1040 <fopen@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
jne    1195 <save_file+0x45>
mov    -0x8(%rbp),%rdi
call   1050 <perror@plt>
mov    $0x1,%edi
call   1060 <exit@plt>
mov    -0x10(%rbp),%rdi
mov    -0x14(%rbp),%edx
mov    -0x20(%rbp),%rcx
mov    $0x1,%esi
call   1070 <fwrite@plt>
mov    -0x20(%rbp),%rdi
call   1030 <fclose@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<save_file>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %edx,%r14d
mov    %rsi,%r15
mov    %rdi,%rbx
lea    0xe99(%rip),%rsi
call   1040 <fopen@plt>
test   %rax,%rax
je     1199 <save_file+0x49>
mov    %rax,%rbp
mov    %r15,%rdi
mov    $0x1,%esi
mov    %r14d,%edx
mov    %rax,%rcx
call   1070 <fwrite@plt>
mov    %rbp,%rdi
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
jmp    1030 <fclose@plt>
mov    %rbx,%rdi
call   1050 <perror@plt>
mov    $0x1,%edi
call   1060 <exit@plt>

LLVM IR (-O0):
@.str = [3 x i8] c"wb\00"
define void @save_file(i8* %0, i32* %1, i32 %2) {
%4 = alloca i8*
%5 = alloca i32*
%6 = alloca i32
%7 = alloca i32*
store i8* %0, i8** %4
store i32* %1, i32** %5
store i32 %2, i32* %6
%8 = load i8*, i8** %4
%9 = call i32* @fopen(i8* %8, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32* %9, i32** %7
%10 = load i32*, i32** %7
%11 = icmp ne i32* %10, null
br i1 %11, label %16, label %12
12: ; preds = %3
%13 = load i8*, i8** %4
%14 = call i32 @perror(i8* %13)
%15 = call i32 @exit(i32 1)
unreachable
16: ; preds = %3
%17 = load i32*, i32** %5
%18 = load i32, i32* %6
%19 = load i32*, i32** %7
%20 = call i32 @fwrite(i32* %17, i32 1, i32 %18, i32* %19)
%21 = load i32*, i32** %7
%22 = call i32 @fclose(i32* %21)
ret void
}

LLVM IR (-O2):
@.str = [3 x i8] c"wb\00"
define void @save_file(i8* nocapture %0, i32* nocapture %1, i32 %2) {
%4 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%5 = icmp eq i32* %4, null
br i1 %5, label %6, label %9
6: ; preds = %3
%7 = tail call i32 @perror(i8* %0)
%8 = tail call i32 @exit(i32 1)
unreachable
9: ; preds = %3
%10 = tail call i32 @fwrite(i32* %1, i32 1, i32 %2, i32* %4)
%11 = tail call i32 @fclose(i32* %4)
ret void
}