#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 scalar_t__ ssize_t;

/* Variables and functions */
int /*<<< orphan*/ perror(char *);
scalar_t__ write(int, char const *, size_t);
int full_write(int fd, const char *buf, size_t nbuf) {
  for (size_t nwritten = 0; nwritten < nbuf;) {
    ssize_t w = write(fd, buf + nwritten, nbuf - nwritten);
    if (w < 0) {
      perror("parrot: write");
      return -1;
    }
    nwritten += w;
  }
  return 0;
}


x86 assembly (clang, -O0):
<full_write>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %rdx,-0x18(%rbp)
movq   $0x0,-0x20(%rbp)
mov    -0x20(%rbp),%rax
cmp    -0x18(%rbp),%rax
jae    1199 <full_write+0x79>
mov    -0x8(%rbp),%edi
mov    -0x10(%rbp),%rsi
add    -0x20(%rbp),%rsi
mov    -0x18(%rbp),%rdx
sub    -0x20(%rbp),%rdx
call   1030 <write@plt>
mov    %rax,-0x28(%rbp)
cmpq   $0x0,-0x28(%rbp)
jge    1188 <full_write+0x68>
lea    0xe89(%rip),%rdi
call   1040 <perror@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11a0 <full_write+0x80>
mov    -0x28(%rbp),%rax
add    -0x20(%rbp),%rax
mov    %rax,-0x20(%rbp)
jmp    113b <full_write+0x1b>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<full_write>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
test   %rdx,%rdx
je     115f <full_write+0x3f>
mov    %rdx,%rbx
mov    %rsi,%r14
mov    %edi,%r15d
xor    %ebp,%ebp
nopw   0x0(%rax,%rax,1)
lea    (%r14,%rbp,1),%rsi
mov    %rbx,%rdx
sub    %rbp,%rdx
mov    %r15d,%edi
call   1030 <write@plt>
test   %rax,%rax
js     116c <full_write+0x4c>
add    %rax,%rbp
cmp    %rbx,%rbp
jb     1140 <full_write+0x20>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret
lea    0xe8d(%rip),%rdi
call   1040 <perror@plt>
mov    $0xffffffff,%eax
jmp    1161 <full_write+0x41>

LLVM IR (-O0):
@.str = [14 x i8] c"parrot: write\00"
define i32 @full_write(i32 %0, i8* %1, i64 %2) {
%4 = alloca i32
%5 = alloca i32
%6 = alloca i8*
%7 = alloca i64
%8 = alloca i64
%9 = alloca i64
store i32 %0, i32* %5
store i8* %1, i8** %6
store i64 %2, i64* %7
store i64 0, i64* %8
br label %10
10: ; preds = %27, %3
%11 = load i64, i64* %8
%12 = load i64, i64* %7
%13 = icmp ult i64 %11, %12
br i1 %13, label %14, label %31
14: ; preds = %10
%15 = load i32, i32* %5
%16 = load i8*, i8** %6
%17 = load i64, i64* %8
%18 = getelementptr inbounds i8, i8* %16, i64 %17
%19 = load i64, i64* %7
%20 = load i64, i64* %8
%21 = sub i64 %19, %20
%22 = call i64 @write(i32 %15, i8* %18, i64 %21)
store i64 %22, i64* %9
%23 = load i64, i64* %9
%24 = icmp slt i64 %23, 0
br i1 %24, label %25, label %27
25: ; preds = %14
%26 = call i32 @perror(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0))
store i32 -1, i32* %4
br label %32
27: ; preds = %14
%28 = load i64, i64* %9
%29 = load i64, i64* %8
%30 = add i64 %29, %28
store i64 %30, i64* %8
br label %10
31: ; preds = %10
store i32 0, i32* %4
br label %32
32: ; preds = %31, %25
%33 = load i32, i32* %4
ret i32 %33
}

LLVM IR (-O2):
@.str = [14 x i8] c"parrot: write\00"
define i32 @full_write(i32 %0, i8* nocapture %1, i64 %2) {
%4 = icmp eq i64 %2, 0
br i1 %4, label %16, label %7
5: ; preds = %7
%6 = icmp ult i64 %13, %2
br i1 %6, label %7, label %16
7: ; preds = %3, %5
%8 = phi i64 [ %13, %5 ], [ 0, %3 ]
%9 = getelementptr inbounds i8, i8* %1, i64 %8
%10 = sub i64 %2, %8
%11 = tail call i64 @write(i32 %0, i8* %9, i64 %10)
%12 = icmp slt i64 %11, 0
%13 = add i64 %11, %8
br i1 %12, label %14, label %5
14: ; preds = %7
%15 = tail call i32 @perror(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0))
br label %16
16: ; preds = %5, %3, %14
%17 = phi i32 [ -1, %14 ], [ 0, %3 ], [ 0, %5 ]
ret i32 %17
}