#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*/ errno;
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, int, char *);
int /*<<< orphan*/ stderr;
char *strerror(int /*<<< orphan*/);
int write(int, void *, int);
void checked_write(int handle, void *buffer, int nbyte) {
  if (write(handle, buffer, nbyte) != nbyte) {
    fprintf(stderr, "write to fd %i failed: %s\n", handle, strerror(errno));
  }
}


x86 assembly (clang, -O0):
<checked_write>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %edx,-0x14(%rbp)
mov    -0x4(%rbp),%edi
mov    -0x10(%rbp),%rsi
mov    -0x14(%rbp),%edx
call   1030 <write@plt>
cmp    -0x14(%rbp),%eax
je     118f <checked_write+0x5f>
mov    0x2e7f(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x1c(%rbp)
mov    -0x4(%rbp),%eax
mov    %eax,-0x18(%rbp)
mov    0x2e65(%rip),%rax
mov    (%rax),%edi
call   1050 <strerror@plt>
mov    -0x1c(%rbp),%edi
mov    -0x18(%rbp),%edx
mov    %rax,%rcx
lea    0xe76(%rip),%rsi
call   1040 <fprintf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<checked_write>:
push   %rbp
push   %rbx
push   %rax
mov    %edx,%ebp
mov    %edi,%ebx
call   1030 <write@plt>
cmp    %ebp,%eax
jne    1147 <checked_write+0x17>
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret
mov    0x2e92(%rip),%rax
mov    (%rax),%ebp
mov    0x2e81(%rip),%rax
mov    (%rax),%edi
call   1050 <strerror@plt>
lea    0xe9b(%rip),%rsi
mov    %ebp,%edi
mov    %ebx,%edx
mov    %rax,%rcx
add    $0x8,%rsp
pop    %rbx
pop    %rbp
jmp    1040 <fprintf@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [27 x i8] c"write to fd %i failed: %s\0A\00"
@errno = global i32 0
define void @checked_write(i32 %0, i8* %1, i32 %2) {
%4 = alloca i32
%5 = alloca i8*
%6 = alloca i32
store i32 %0, i32* %4
store i8* %1, i8** %5
store i32 %2, i32* %6
%7 = load i32, i32* %4
%8 = load i8*, i8** %5
%9 = load i32, i32* %6
%10 = call i32 @write(i32 %7, i8* %8, i32 %9)
%11 = load i32, i32* %6
%12 = icmp ne i32 %10, %11
br i1 %12, label %13, label %19
13: ; preds = %3
%14 = load i32, i32* @stderr
%15 = load i32, i32* %4
%16 = load i32, i32* @errno
%17 = call i8* @strerror(i32 %16)
%18 = call i32 @fprintf(i32 %14, i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0), i32 %15, i8* %17)
br label %19
19: ; preds = %13, %3
ret void
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [27 x i8] c"write to fd %i failed: %s\0A\00"
@errno = global i32 0
define void @checked_write(i32 %0, i8* nocapture %1, i32 %2) {
%4 = tail call i32 @write(i32 %0, i8* %1, i32 %2)
%5 = icmp eq i32 %4, %2
br i1 %5, label %11, label %6
6: ; preds = %3
%7 = load i32, i32* @stderr
%8 = load i32, i32* @errno
%9 = tail call i8* @strerror(i32 %8)
%10 = tail call i32 @fprintf(i32 %7, i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str, i64 0, i64 0), i32 %0, i8* %9)
br label %11
11: ; preds = %6, %3
ret void
}