#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*/ fprintf(int /*<<< orphan*/, char *, ...);
int fread(unsigned char *, int, int, int /*<<< orphan*/);
int /*<<< orphan*/ fwrite(unsigned short *, int, int, int /*<<< orphan*/);
int /*<<< orphan*/ stderr;
int /*<<< orphan*/ stdin;
int /*<<< orphan*/ stdout;
int main(int argc, char *argv[]) {
  if (argc > 1) {
    fprintf(stderr, "< input > output\n");
    return 1;
  }
  fprintf(stderr, "%s: running ...\n", argv[0]);
  for (;;) {
    unsigned char x[4096];
    unsigned short y[4096];
    int r = fread(x, sizeof(unsigned char), 4096, stdin);
    if (r == 0)
      break;
    {
      int i;
      for (i = 0; i < r; i++) {
        y[i] = (unsigned short)x[i];
      }
    }
    fwrite(y, sizeof(unsigned short), r, stdout);
  }
  fprintf(stderr, "%s: done\n", argv[0]);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x3020,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x1,-0x8(%rbp)
jle    1176 <main+0x46>
mov    0x2e7e(%rip),%rax
mov    (%rax),%edi
lea    0xe9d(%rip),%rsi
mov    $0x0,%al
call   1040 <fprintf@plt>
movl   $0x1,-0x4(%rbp)
jmp    1266 <main+0x136>
mov    0x2e5b(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xe85(%rip),%rsi
mov    $0x0,%al
call   1040 <fprintf@plt>
lea    -0x1010(%rbp),%rdi
mov    0x2e46(%rip),%rax
mov    (%rax),%ecx
mov    $0x1,%esi
mov    $0x1000,%edx
call   1030 <fread@plt>
mov    %eax,-0x3014(%rbp)
cmpl   $0x0,-0x3014(%rbp)
jne    11cb <main+0x9b>
jmp    1241 <main+0x111>
movl   $0x0,-0x3018(%rbp)
mov    -0x3018(%rbp),%eax
cmp    -0x3014(%rbp),%eax
jge    121c <main+0xec>
movslq -0x3018(%rbp),%rax
movzbl -0x1010(%rbp,%rax,1),%eax
ff
mov    %ax,%cx
movslq -0x3018(%rbp),%rax
mov    %cx,-0x3010(%rbp,%rax,2)
ff
mov    -0x3018(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x3018(%rbp)
jmp    11d5 <main+0xa5>
lea    -0x3010(%rbp),%rdi
mov    -0x3014(%rbp),%edx
mov    0x2da0(%rip),%rax
mov    (%rax),%ecx
mov    $0x2,%esi
call   1050 <fwrite@plt>
jmp    1194 <main+0x64>
mov    0x2d90(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xdcb(%rip),%rsi
mov    $0x0,%al
call   1040 <fprintf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x3020,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
sub    $0x3008,%rsp
mov    %edi,%eax
mov    0x2e8e(%rip),%rcx
mov    (%rcx),%edi
cmp    $0x2,%eax
jl     1169 <main+0x39>
lea    0xea8(%rip),%rsi
xor    %eax,%eax
call   1040 <fprintf@plt>
mov    $0x1,%eax
jmp    1310 <main+0x1e0>
mov    %rsi,%r15
mov    (%rsi),%rdx
lea    0xe9c(%rip),%rsi
xor    %eax,%eax
call   1040 <fprintf@plt>
mov    0x2e64(%rip),%r13
mov    0x0(%r13),%ecx
mov    %rsp,%rdi
mov    $0x1,%esi
mov    $0x1000,%edx
call   1030 <fread@plt>
test   %eax,%eax
je     12f4 <main+0x1c4>
pxor   %xmm2,%xmm2
mov    0x2e23(%rip),%r12
lea    0x1000(%rsp),%r14
mov    %rsp,%rbx
jmp    11f5 <main+0xc5>
nopw   0x0(%rax,%rax,1)
mov    (%r12),%ecx
mov    %r14,%rdi
mov    $0x2,%esi
mov    %eax,%edx
call   1050 <fwrite@plt>
mov    0x0(%r13),%ecx
mov    %rbx,%rdi
mov    $0x1,%esi
mov    $0x1000,%edx
call   1030 <fread@plt>
pxor   %xmm2,%xmm2
test   %eax,%eax
je     12f4 <main+0x1c4>
test   %eax,%eax
jle    11c0 <main+0x90>
mov    %eax,%ecx
cmp    $0x10,%eax
jae    1210 <main+0xe0>
xor    %edx,%edx
jmp    12d0 <main+0x1a0>
nopw   0x0(%rax,%rax,1)
mov    %ecx,%edx
and    $0xfffffff0,%edx
lea    -0x10(%rdx),%rsi
mov    %rsi,%rbp
shr    $0x4,%rbp
add    $0x1,%rbp
test   %rsi,%rsi
je     12ea <main+0x1ba>
mov    %rbp,%rsi
and    $0xfffffffffffffffe,%rsi
xor    %edi,%edi
cs nopw 0x0(%rax,%rax,1)
movq   (%rsp,%rdi,1),%xmm0
movq   0x8(%rsp,%rdi,1),%xmm1
punpcklbw %xmm2,%xmm0
punpcklbw %xmm2,%xmm1
movdqa %xmm0,0x1000(%rsp,%rdi,2)
movdqa %xmm1,0x1010(%rsp,%rdi,2)
movq   0x10(%rsp,%rdi,1),%xmm0
movq   0x18(%rsp,%rdi,1),%xmm1
punpcklbw %xmm2,%xmm0
punpcklbw %xmm2,%xmm1
movdqa %xmm0,0x1020(%rsp,%rdi,2)
movdqa %xmm1,0x1030(%rsp,%rdi,2)
add    $0x20,%rdi
add    $0xfffffffffffffffe,%rsi
jne    1240 <main+0x110>
test   $0x1,%bpl
je     12c0 <main+0x190>
movq   (%rsp,%rdi,1),%xmm0
movq   0x8(%rsp,%rdi,1),%xmm1
punpcklbw %xmm2,%xmm0
punpcklbw %xmm2,%xmm1
movdqa %xmm0,0x1000(%rsp,%rdi,2)
movdqa %xmm1,0x1010(%rsp,%rdi,2)
cmp    %rcx,%rdx
je     11c0 <main+0x90>
nopl   0x0(%rax)
movzbl (%rsp,%rdx,1),%esi
mov    %si,0x1000(%rsp,%rdx,2)
add    $0x1,%rdx
cmp    %rdx,%rcx
jne    12d0 <main+0x1a0>
jmp    11c0 <main+0x90>
xor    %edi,%edi
test   $0x1,%bpl
jne    129b <main+0x16b>
jmp    12c0 <main+0x190>
mov    0x2cdd(%rip),%rax
mov    (%rax),%edi
mov    (%r15),%rdx
lea    0xd1c(%rip),%rsi
xor    %eax,%eax
call   1040 <fprintf@plt>
xor    %eax,%eax
add    $0x3008,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@stderr = global i32 0
@.str = [18 x i8] c"< input > output\0A\00"
@.str.1 = [17 x i8] c"%s: running ...\0A\00"
@stdin = global i32 0
@stdout = global i32 0
@.str.2 = [10 x i8] c"%s: done\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca [4096 x i8]
%7 = alloca [4096 x i16]
%8 = alloca i32
%9 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%10 = load i32, i32* %4
%11 = icmp sgt i32 %10, 1
br i1 %11, label %12, label %15
12: ; preds = %2
%13 = load i32, i32* @stderr
%14 = call i32 (i32, i8*, ...) @fprintf(i32 %13, i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
store i32 1, i32* %3
br label %56
15: ; preds = %2
%16 = load i32, i32* @stderr
%17 = load i8**, i8*** %5
%18 = getelementptr inbounds i8*, i8** %17, i64 0
%19 = load i8*, i8** %18
%20 = call i32 (i32, i8*, ...) @fprintf(i32 %16, i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i8* %19)
br label %21
21: ; preds = %45, %15
%22 = getelementptr inbounds [4096 x i8], [4096 x i8]* %6, i64 0, i64 0
%23 = load i32, i32* @stdin
%24 = call i32 @fread(i8* %22, i32 1, i32 4096, i32 %23)
store i32 %24, i32* %8
%25 = load i32, i32* %8
%26 = icmp eq i32 %25, 0
br i1 %26, label %27, label %28
27: ; preds = %21
br label %50
28: ; preds = %21
store i32 0, i32* %9
br label %29
29: ; preds = %42, %28
%30 = load i32, i32* %9
%31 = load i32, i32* %8
%32 = icmp slt i32 %30, %31
br i1 %32, label %33, label %45
33: ; preds = %29
%34 = load i32, i32* %9
%35 = sext i32 %34 to i64
%36 = getelementptr inbounds [4096 x i8], [4096 x i8]* %6, i64 0, i64 %35
%37 = load i8, i8* %36
%38 = zext i8 %37 to i16
%39 = load i32, i32* %9
%40 = sext i32 %39 to i64
%41 = getelementptr inbounds [4096 x i16], [4096 x i16]* %7, i64 0, i64 %40
store i16 %38, i16* %41
br label %42
42: ; preds = %33
%43 = load i32, i32* %9
%44 = add nsw i32 %43, 1
store i32 %44, i32* %9
br label %29
45: ; preds = %29
%46 = getelementptr inbounds [4096 x i16], [4096 x i16]* %7, i64 0, i64 0
%47 = load i32, i32* %8
%48 = load i32, i32* @stdout
%49 = call i32 @fwrite(i16* %46, i32 2, i32 %47, i32 %48)
br label %21
50: ; preds = %27
%51 = load i32, i32* @stderr
%52 = load i8**, i8*** %5
%53 = getelementptr inbounds i8*, i8** %52, i64 0
%54 = load i8*, i8** %53
%55 = call i32 (i32, i8*, ...) @fprintf(i32 %51, i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i8* %54)
store i32 0, i32* %3
br label %56
56: ; preds = %50, %12
%57 = load i32, i32* %3
ret i32 %57
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [18 x i8] c"< input > output\0A\00"
@.str.1 = [17 x i8] c"%s: running ...\0A\00"
@stdin = global i32 0
@stdout = global i32 0
@.str.2 = [10 x i8] c"%s: done\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = alloca [4096 x i8]
%4 = alloca [4096 x i16]
%5 = icmp sgt i32 %0, 1
%6 = load i32, i32* @stderr
br i1 %5, label %7, label %9
7: ; preds = %2
%8 = tail call i32 (i32, i8*, ...) @fprintf(i32 %6, i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0))
br label %103
9: ; preds = %2
%10 = load i8*, i8** %1
%11 = tail call i32 (i32, i8*, ...) @fprintf(i32 %6, i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i8* %10)
%12 = getelementptr inbounds [4096 x i8], [4096 x i8]* %3, i64 0, i64 0
%13 = bitcast [4096 x i16]* %4 to i8*
%14 = load i32, i32* @stdin
%15 = call i32 @fread(i8* %12, i32 1, i32 4096, i32 %14)
%16 = icmp eq i32 %15, 0
br i1 %16, label %99, label %17
17: ; preds = %9
%18 = getelementptr inbounds [4096 x i16], [4096 x i16]* %4, i64 0, i64 0
br label %19
19: ; preds = %17, %93
%20 = phi i32 [ %15, %17 ], [ %97, %93 ]
%21 = icmp sgt i32 %20, 0
br i1 %21, label %22, label %93
22: ; preds = %19
%23 = zext i32 %20 to i64
%24 = icmp ult i32 %20, 16
br i1 %24, label %83, label %25
25: ; preds = %22
%26 = and i64 %23, 4294967280
%27 = add nsw i64 %26, -16
%28 = lshr exact i64 %27, 4
%29 = add nuw nsw i64 %28, 1
%30 = and i64 %29, 1
%31 = icmp eq i64 %27, 0
br i1 %31, label %65, label %32
32: ; preds = %25
%33 = and i64 %29, 2305843009213693950
br label %34
34: ; preds = %34, %32
%35 = phi i64 [ 0, %32 ], [ %62, %34 ]
%36 = phi i64 [ 0, %32 ], [ %63, %34 ]
%37 = getelementptr inbounds [4096 x i8], [4096 x i8]* %3, i64 0, i64 %35
%38 = bitcast i8* %37 to <8 x i8>*
%39 = load <8 x i8>, <8 x i8>* %38
%40 = getelementptr inbounds i8, i8* %37, i64 8
%41 = bitcast i8* %40 to <8 x i8>*
%42 = load <8 x i8>, <8 x i8>* %41
%43 = zext <8 x i8> %39 to <8 x i16>
%44 = zext <8 x i8> %42 to <8 x i16>
%45 = getelementptr inbounds [4096 x i16], [4096 x i16]* %4, i64 0, i64 %35
%46 = bitcast i16* %45 to <8 x i16>*
store <8 x i16> %43, <8 x i16>* %46
%47 = getelementptr inbounds i16, i16* %45, i64 8
%48 = bitcast i16* %47 to <8 x i16>*
store <8 x i16> %44, <8 x i16>* %48
%49 = or i64 %35, 16
%50 = getelementptr inbounds [4096 x i8], [4096 x i8]* %3, i64 0, i64 %49
%51 = bitcast i8* %50 to <8 x i8>*
%52 = load <8 x i8>, <8 x i8>* %51
%53 = getelementptr inbounds i8, i8* %50, i64 8
%54 = bitcast i8* %53 to <8 x i8>*
%55 = load <8 x i8>, <8 x i8>* %54
%56 = zext <8 x i8> %52 to <8 x i16>
%57 = zext <8 x i8> %55 to <8 x i16>
%58 = getelementptr inbounds [4096 x i16], [4096 x i16]* %4, i64 0, i64 %49
%59 = bitcast i16* %58 to <8 x i16>*
store <8 x i16> %56, <8 x i16>* %59
%60 = getelementptr inbounds i16, i16* %58, i64 8
%61 = bitcast i16* %60 to <8 x i16>*
store <8 x i16> %57, <8 x i16>* %61
%62 = add nuw i64 %35, 32
%63 = add i64 %36, 2
%64 = icmp eq i64 %63, %33
br i1 %64, label %65, label %34
65: ; preds = %34, %25
%66 = phi i64 [ 0, %25 ], [ %62, %34 ]
%67 = icmp eq i64 %30, 0
br i1 %67, label %81, label %68
68: ; preds = %65
%69 = getelementptr inbounds [4096 x i8], [4096 x i8]* %3, i64 0, i64 %66
%70 = bitcast i8* %69 to <8 x i8>*
%71 = load <8 x i8>, <8 x i8>* %70
%72 = getelementptr inbounds i8, i8* %69, i64 8
%73 = bitcast i8* %72 to <8 x i8>*
%74 = load <8 x i8>, <8 x i8>* %73
%75 = zext <8 x i8> %71 to <8 x i16>
%76 = zext <8 x i8> %74 to <8 x i16>
%77 = getelementptr inbounds [4096 x i16], [4096 x i16]* %4, i64 0, i64 %66
%78 = bitcast i16* %77 to <8 x i16>*
store <8 x i16> %75, <8 x i16>* %78
%79 = getelementptr inbounds i16, i16* %77, i64 8
%80 = bitcast i16* %79 to <8 x i16>*
store <8 x i16> %76, <8 x i16>* %80
br label %81
81: ; preds = %65, %68
%82 = icmp eq i64 %26, %23
br i1 %82, label %93, label %83
83: ; preds = %22, %81
%84 = phi i64 [ 0, %22 ], [ %26, %81 ]
br label %85
85: ; preds = %83, %85
%86 = phi i64 [ %91, %85 ], [ %84, %83 ]
%87 = getelementptr inbounds [4096 x i8], [4096 x i8]* %3, i64 0, i64 %86
%88 = load i8, i8* %87
%89 = zext i8 %88 to i16
%90 = getelementptr inbounds [4096 x i16], [4096 x i16]* %4, i64 0, i64 %86
store i16 %89, i16* %90
%91 = add nuw nsw i64 %86, 1
%92 = icmp eq i64 %91, %23
br i1 %92, label %93, label %85
93: ; preds = %85, %81, %19
%94 = load i32, i32* @stdout
%95 = call i32 @fwrite(i16* %18, i32 2, i32 %20, i32 %94)
%96 = load i32, i32* @stdin
%97 = call i32 @fread(i8* %12, i32 1, i32 4096, i32 %96)
%98 = icmp eq i32 %97, 0
br i1 %98, label %99, label %19
99: ; preds = %93, %9
%100 = load i32, i32* @stderr
%101 = load i8*, i8** %1
%102 = call i32 (i32, i8*, ...) @fprintf(i32 %100, i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.2, i64 0, i64 0), i8* %101)
br label %103
103: ; preds = %99, %7
%104 = phi i32 [ 1, %7 ], [ 0, %99 ]
ret i32 %104
}