#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 */
struct stat {
  int st_size;
};

/* Variables and functions */
int O_CREAT;
int /*<<< orphan*/ O_RDONLY;
int O_RDWR;
int /*<<< orphan*/ SEEK_SET;
int /*<<< orphan*/ close(int);
int /*<<< orphan*/ exit(int /*<<< orphan*/);
int /*<<< orphan*/ fstat(int, struct stat *);
int /*<<< orphan*/ lseek(int, int, int /*<<< orphan*/);
char *malloc(int);
int open(char const *, int, ...);
int /*<<< orphan*/ printf(char *, ...);
int read(int, void *, int);
int /*<<< orphan*/ write(int, void *, int);
int main(int argc, char *argv[]) {
  int fdreadwrite;
  int fdin;
  const char *IFILENAME = "lowlevel-read-write.c";
  const char *OFILENAME = "reversed.txt";
  struct stat stat_buf;
  int m = 20;
  int k;
  int n;
  int block_count;
  int i, j;
  char *buffer = malloc(m + 3);
  buffer[m + 2] = '\000';
  fdin = open(IFILENAME, O_RDONLY);
  fdreadwrite = open(OFILENAME, O_RDWR | O_CREAT, 0666);
  printf("fdin=%d fdreadwrite=%d\n", fdin, fdreadwrite);
  fstat(fdin, &stat_buf);
  n = stat_buf.st_size;
  block_count = (n + m - 1) / m;
  printf("size=%d block_count=%d\n", n, block_count);
  for (i = 0; i < block_count; i++) {
    k = read(fdin, (void *)(buffer + 1), m);
    if (k == 0) {
      break;
    }
    for (j = k + 1; j <= m; j++) {
      buffer[j] = ' ';
    }
    buffer[0] = '|';
    buffer[m + 1] = '|';
    lseek(fdreadwrite, (block_count - i - 1) * (m + 2), SEEK_SET);
    write(fdreadwrite, (void *)buffer, m + 2);
  }
  close(fdin);
  lseek(fdreadwrite, 0, SEEK_SET);
  for (i = 0; i < block_count; i++) {
    k = read(fdreadwrite, (void *)buffer, m);
    buffer[k] = '\000';
    printf("%s", buffer);
  }
  close(fdreadwrite);
  printf("\n");
  exit(0);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x50,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xe53(%rip),%rax
mov    %rax,-0x20(%rbp)
lea    0xe5e(%rip),%rax
mov    %rax,-0x28(%rbp)
movl   $0x14,-0x34(%rbp)
mov    -0x34(%rbp),%edi
add    $0x3,%edi
call   1080 <malloc@plt>
mov    %rax,-0x50(%rbp)
mov    -0x50(%rbp),%rax
mov    -0x34(%rbp),%ecx
add    $0x2,%ecx
movslq %ecx,%rcx
movb   $0x0,(%rax,%rcx,1)
mov    -0x20(%rbp),%rdi
mov    0x2dea(%rip),%rax
mov    (%rax),%esi
mov    $0x0,%al
call   1090 <open@plt>
mov    %eax,-0x18(%rbp)
mov    -0x28(%rbp),%rdi
mov    0x2ddb(%rip),%rax
mov    (%rax),%esi
mov    0x2dea(%rip),%rax
or     (%rax),%esi
mov    $0x1b6,%edx
mov    $0x0,%al
call   1090 <open@plt>
mov    %eax,-0x14(%rbp)
mov    -0x18(%rbp),%esi
mov    -0x14(%rbp),%edx
lea    0xdf7(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x18(%rbp),%edi
lea    -0x30(%rbp),%rsi
call   10b0 <fstat@plt>
mov    -0x30(%rbp),%eax
mov    %eax,-0x3c(%rbp)
mov    -0x3c(%rbp),%eax
add    -0x34(%rbp),%eax
sub    $0x1,%eax
cltd
idivl  -0x34(%rbp)
mov    %eax,-0x40(%rbp)
mov    -0x3c(%rbp),%esi
mov    -0x40(%rbp),%edx
lea    0xdd9(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movl   $0x0,-0x44(%rbp)
mov    -0x44(%rbp),%eax
cmp    -0x40(%rbp),%eax
jge    132b <main+0x19b>
mov    -0x18(%rbp),%edi
mov    -0x50(%rbp),%rsi
add    $0x1,%rsi
mov    -0x34(%rbp),%edx
call   1070 <read@plt>
mov    %eax,-0x38(%rbp)
cmpl   $0x0,-0x38(%rbp)
jne    12a1 <main+0x111>
jmp    132b <main+0x19b>
mov    -0x38(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x48(%rbp)
mov    -0x48(%rbp),%eax
cmp    -0x34(%rbp),%eax
jg     12d0 <main+0x140>
mov    -0x50(%rbp),%rax
movslq -0x48(%rbp),%rcx
movb   $0x20,(%rax,%rcx,1)
mov    -0x48(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x48(%rbp)
jmp    12aa <main+0x11a>
mov    -0x50(%rbp),%rax
movb   $0x7c,(%rax)
mov    -0x50(%rbp),%rax
mov    -0x34(%rbp),%ecx
add    $0x1,%ecx
movslq %ecx,%rcx
movb   $0x7c,(%rax,%rcx,1)
mov    -0x14(%rbp),%edi
mov    -0x40(%rbp),%esi
sub    -0x44(%rbp),%esi
sub    $0x1,%esi
mov    -0x34(%rbp),%eax
add    $0x2,%eax
imul   %eax,%esi
mov    0x2cc4(%rip),%rax
mov    (%rax),%edx
call   1050 <lseek@plt>
mov    -0x14(%rbp),%edi
mov    -0x50(%rbp),%rsi
mov    -0x34(%rbp),%edx
add    $0x2,%edx
call   1030 <write@plt>
mov    -0x44(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x44(%rbp)
jmp    1270 <main+0xe0>
mov    -0x18(%rbp),%edi
call   1060 <close@plt>
mov    -0x14(%rbp),%edi
mov    0x2c8b(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1050 <lseek@plt>
movl   $0x0,-0x44(%rbp)
mov    -0x44(%rbp),%eax
cmp    -0x40(%rbp),%eax
jge    1397 <main+0x207>
mov    -0x14(%rbp),%edi
mov    -0x50(%rbp),%rsi
mov    -0x34(%rbp),%edx
call   1070 <read@plt>
mov    %eax,-0x38(%rbp)
mov    -0x50(%rbp),%rax
movslq -0x38(%rbp),%rcx
movb   $0x0,(%rax,%rcx,1)
mov    -0x50(%rbp),%rsi
lea    0xcd1(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x44(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x44(%rbp)
jmp    134d <main+0x1bd>
mov    -0x14(%rbp),%edi
call   1060 <close@plt>
lea    0xc93(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %edi,%edi
call   10a0 <exit@plt>

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
sub    $0x18,%rsp
mov    $0x17,%edi
call   10a0 <malloc@plt>
mov    %rax,%rbx
movb   $0x0,0x16(%rax)
mov    0x2e02(%rip),%rax
mov    (%rax),%esi
lea    0xe21(%rip),%rdi
xor    %eax,%eax
call   10b0 <open@plt>
mov    %eax,%r14d
mov    0x2df0(%rip),%rax
mov    0x2e01(%rip),%rcx
mov    (%rcx),%esi
or     (%rax),%esi
lea    0xe14(%rip),%rdi
mov    $0x1b6,%edx
xor    %eax,%eax
call   10b0 <open@plt>
mov    %eax,%r13d
lea    0xe0b(%rip),%rdi
mov    %r14d,%esi
mov    %eax,%edx
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rsp,%rsi
mov    %r14d,%edi
call   10d0 <fstat@plt>
mov    (%rsp),%ebp
lea    0x13(%rbp),%eax
cltq
imul   $0x66666667,%rax,%r12
mov    %r12,%rax
shr    $0x3f,%rax
sar    $0x23,%r12
add    %eax,%r12d
lea    0xde8(%rip),%rdi
mov    %ebp,%esi
mov    %r12d,%edx
xor    %eax,%eax
call   1050 <printf@plt>
test   %ebp,%ebp
jle    130b <main+0x15b>
mov    %rbp,0x10(%rsp)
mov    %rbx,%rbp
add    $0x1,%rbp
cmp    $0x2,%r12d
mov    $0x1,%r15d
cmovge %r12d,%r15d
lea    (%r12,%r12,4),%eax
lea    (%r12,%rax,4),%eax
mov    %r12,0x8(%rsp)
add    %eax,%r12d
add    $0xffffffea,%r12d
jmp    12d5 <main+0x125>
nopw   0x0(%rax,%rax,1)
movb   $0x7c,(%rbx)
movb   $0x7c,0x15(%rbx)
mov    0x2d1a(%rip),%rax
mov    (%rax),%edx
mov    %r13d,%edi
mov    %r12d,%esi
call   1060 <lseek@plt>
mov    %r13d,%edi
mov    %rbx,%rsi
mov    $0x16,%edx
call   1040 <write@plt>
add    $0xffffffea,%r12d
add    $0xffffffff,%r15d
je     1328 <main+0x178>
mov    %r14d,%edi
mov    %rbp,%rsi
mov    $0x14,%edx
call   1090 <read@plt>
test   %eax,%eax
je     1328 <main+0x178>
cmp    $0x13,%eax
jg     12a0 <main+0xf0>
movslq %eax,%rdi
add    %rbp,%rdi
mov    $0x13,%edx
sub    %eax,%edx
add    $0x1,%rdx
mov    $0x20,%esi
call   1070 <memset@plt>
jmp    12a0 <main+0xf0>
mov    %r14d,%edi
call   1080 <close@plt>
mov    0x2cae(%rip),%rax
mov    (%rax),%edx
mov    %r13d,%edi
xor    %esi,%esi
call   1060 <lseek@plt>
jmp    1398 <main+0x1e8>
mov    %r14d,%edi
call   1080 <close@plt>
mov    0x2c91(%rip),%rax
mov    (%rax),%edx
mov    %r13d,%edi
xor    %esi,%esi
call   1060 <lseek@plt>
cmpl   $0x0,0x10(%rsp)
jle    1398 <main+0x1e8>
mov    0x8(%rsp),%rax
cmp    $0x2,%eax
mov    $0x1,%ebp
cmovge %eax,%ebp
lea    0xcf2(%rip),%r14
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
mov    %r13d,%edi
mov    %rbx,%rsi
mov    $0x14,%edx
call   1090 <read@plt>
cltq
movb   $0x0,(%rbx,%rax,1)
mov    %r14,%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1050 <printf@plt>
add    $0xffffffff,%ebp
jne    1370 <main+0x1c0>
mov    %r13d,%edi
call   1080 <close@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %edi,%edi
call   10c0 <exit@plt>

LLVM IR (-O0):
%struct.stat = type { i32 }
@.str = [22 x i8] c"lowlevel-read-write.c\00"
@.str.1 = [13 x i8] c"reversed.txt\00"
@O_RDONLY = global i32 0
@O_RDWR = global i32 0
@O_CREAT = global i32 0
@.str.2 = [24 x i8] c"fdin=%d fdreadwrite=%d\0A\00"
@.str.3 = [24 x i8] c"size=%d block_count=%d\0A\00"
@SEEK_SET = global i32 0
@.str.4 = [3 x i8] c"%s\00"
@.str.5 = [2 x i8] c"\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
%8 = alloca i8*
%9 = alloca i8*
%10 = alloca %struct.stat
%11 = alloca i32
%12 = alloca i32
%13 = alloca i32
%14 = alloca i32
%15 = alloca i32
%16 = alloca i32
%17 = alloca i8*
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
store i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), i8** %8
store i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i8** %9
store i32 20, i32* %11
%18 = load i32, i32* %11
%19 = add nsw i32 %18, 3
%20 = call i8* @malloc(i32 %19)
store i8* %20, i8** %17
%21 = load i8*, i8** %17
%22 = load i32, i32* %11
%23 = add nsw i32 %22, 2
%24 = sext i32 %23 to i64
%25 = getelementptr inbounds i8, i8* %21, i64 %24
store i8 0, i8* %25
%26 = load i8*, i8** %8
%27 = load i32, i32* @O_RDONLY
%28 = call i32 (i8*, i32, ...) @open(i8* %26, i32 %27)
store i32 %28, i32* %7
%29 = load i8*, i8** %9
%30 = load i32, i32* @O_RDWR
%31 = load i32, i32* @O_CREAT
%32 = or i32 %30, %31
%33 = call i32 (i8*, i32, ...) @open(i8* %29, i32 %32, i32 438)
store i32 %33, i32* %6
%34 = load i32, i32* %7
%35 = load i32, i32* %6
%36 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.2, i64 0, i64 0), i32 %34, i32 %35)
%37 = load i32, i32* %7
%38 = call i32 @fstat(i32 %37, %struct.stat* %10)
%39 = getelementptr inbounds %struct.stat, %struct.stat* %10, i32 0, i32 0
%40 = load i32, i32* %39
store i32 %40, i32* %13
%41 = load i32, i32* %13
%42 = load i32, i32* %11
%43 = add nsw i32 %41, %42
%44 = sub nsw i32 %43, 1
%45 = load i32, i32* %11
%46 = sdiv i32 %44, %45
store i32 %46, i32* %14
%47 = load i32, i32* %13
%48 = load i32, i32* %14
%49 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.3, i64 0, i64 0), i32 %47, i32 %48)
store i32 0, i32* %15
br label %50
50: ; preds = %101, %2
%51 = load i32, i32* %15
%52 = load i32, i32* %14
%53 = icmp slt i32 %51, %52
br i1 %53, label %54, label %104
54: ; preds = %50
%55 = load i32, i32* %7
%56 = load i8*, i8** %17
%57 = getelementptr inbounds i8, i8* %56, i64 1
%58 = load i32, i32* %11
%59 = call i32 @read(i32 %55, i8* %57, i32 %58)
store i32 %59, i32* %12
%60 = load i32, i32* %12
%61 = icmp eq i32 %60, 0
br i1 %61, label %62, label %63
62: ; preds = %54
br label %104
63: ; preds = %54
%64 = load i32, i32* %12
%65 = add nsw i32 %64, 1
store i32 %65, i32* %16
br label %66
66: ; preds = %75, %63
%67 = load i32, i32* %16
%68 = load i32, i32* %11
%69 = icmp sle i32 %67, %68
br i1 %69, label %70, label %78
70: ; preds = %66
%71 = load i8*, i8** %17
%72 = load i32, i32* %16
%73 = sext i32 %72 to i64
%74 = getelementptr inbounds i8, i8* %71, i64 %73
store i8 32, i8* %74
br label %75
75: ; preds = %70
%76 = load i32, i32* %16
%77 = add nsw i32 %76, 1
store i32 %77, i32* %16
br label %66
78: ; preds = %66
%79 = load i8*, i8** %17
%80 = getelementptr inbounds i8, i8* %79, i64 0
store i8 124, i8* %80
%81 = load i8*, i8** %17
%82 = load i32, i32* %11
%83 = add nsw i32 %82, 1
%84 = sext i32 %83 to i64
%85 = getelementptr inbounds i8, i8* %81, i64 %84
store i8 124, i8* %85
%86 = load i32, i32* %6
%87 = load i32, i32* %14
%88 = load i32, i32* %15
%89 = sub nsw i32 %87, %88
%90 = sub nsw i32 %89, 1
%91 = load i32, i32* %11
%92 = add nsw i32 %91, 2
%93 = mul nsw i32 %90, %92
%94 = load i32, i32* @SEEK_SET
%95 = call i32 @lseek(i32 %86, i32 %93, i32 %94)
%96 = load i32, i32* %6
%97 = load i8*, i8** %17
%98 = load i32, i32* %11
%99 = add nsw i32 %98, 2
%100 = call i32 @write(i32 %96, i8* %97, i32 %99)
br label %101
101: ; preds = %78
%102 = load i32, i32* %15
%103 = add nsw i32 %102, 1
store i32 %103, i32* %15
br label %50
104: ; preds = %62, %50
%105 = load i32, i32* %7
%106 = call i32 @close(i32 %105)
%107 = load i32, i32* %6
%108 = load i32, i32* @SEEK_SET
%109 = call i32 @lseek(i32 %107, i32 0, i32 %108)
store i32 0, i32* %15
br label %110
110: ; preds = %125, %104
%111 = load i32, i32* %15
%112 = load i32, i32* %14
%113 = icmp slt i32 %111, %112
br i1 %113, label %114, label %128
114: ; preds = %110
%115 = load i32, i32* %6
%116 = load i8*, i8** %17
%117 = load i32, i32* %11
%118 = call i32 @read(i32 %115, i8* %116, i32 %117)
store i32 %118, i32* %12
%119 = load i8*, i8** %17
%120 = load i32, i32* %12
%121 = sext i32 %120 to i64
%122 = getelementptr inbounds i8, i8* %119, i64 %121
store i8 0, i8* %122
%123 = load i8*, i8** %17
%124 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0), i8* %123)
br label %125
125: ; preds = %114
%126 = load i32, i32* %15
%127 = add nsw i32 %126, 1
store i32 %127, i32* %15
br label %110
128: ; preds = %110
%129 = load i32, i32* %6
%130 = call i32 @close(i32 %129)
%131 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.5, i64 0, i64 0))
%132 = call i32 @exit(i32 0)
unreachable
}

LLVM IR (-O2):
%struct.stat = type { i32 }
@.str = [22 x i8] c"lowlevel-read-write.c\00"
@.str.1 = [13 x i8] c"reversed.txt\00"
@O_RDONLY = global i32 0
@O_RDWR = global i32 0
@O_CREAT = global i32 0
@.str.2 = [24 x i8] c"fdin=%d fdreadwrite=%d\0A\00"
@.str.3 = [24 x i8] c"size=%d block_count=%d\0A\00"
@SEEK_SET = global i32 0
@.str.4 = [3 x i8] c"%s\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca %struct.stat
%4 = bitcast %struct.stat* %3 to i8*
%5 = tail call dereferenceable_or_null(23) i8* @malloc(i32 23)
%6 = getelementptr inbounds i8, i8* %5, i64 22
store i8 0, i8* %6
%7 = load i32, i32* @O_RDONLY
%8 = tail call i32 (i8*, i32, ...) @open(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0), i32 %7)
%9 = load i32, i32* @O_RDWR
%10 = load i32, i32* @O_CREAT
%11 = or i32 %10, %9
%12 = tail call i32 (i8*, i32, ...) @open(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0), i32 %11, i32 438)
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 x i8]* @.str.2, i64 0, i64 0), i32 %8, i32 %12)
%14 = call i32 @fstat(i32 %8, %struct.stat* %3)
%15 = getelementptr inbounds %struct.stat, %struct.stat* %3, i64 0, i32 0
%16 = load i32, i32* %15
%17 = add nsw i32 %16, 19
%18 = sdiv i32 %17, 20
%19 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([24 x i8], [24 x i8]* @.str.3, i64 0, i64 0), i32 %16, i32 %18)
%20 = getelementptr i8, i8* %5, i64 1
%21 = icmp sgt i32 %16, 0
br i1 %21, label %22, label %60
22: ; preds = %2
%23 = getelementptr inbounds i8, i8* %5, i64 21
%24 = call i32 @llvm.smax.i32(i32 %18, i32 1)
br label %25
25: ; preds = %22, %37
%26 = phi i32 [ 0, %22 ], [ %44, %37 ]
%27 = tail call i32 @read(i32 %8, i8* %20, i32 20)
%28 = icmp eq i32 %27, 0
br i1 %28, label %46, label %29
29: ; preds = %25
%30 = icmp slt i32 %27, 20
br i1 %30, label %31, label %37
31: ; preds = %29
%32 = sext i32 %27 to i64
%33 = getelementptr i8, i8* %20, i64 %32
%34 = sub i32 19, %27
%35 = zext i32 %34 to i64
%36 = add nuw nsw i64 %35, 1
br label %37
37: ; preds = %31, %29
store i8 124, i8* %5
store i8 124, i8* %23
%38 = xor i32 %26, -1
%39 = add nsw i32 %18, %38
%40 = mul nsw i32 %39, 22
%41 = load i32, i32* @SEEK_SET
%42 = tail call i32 @lseek(i32 %12, i32 %40, i32 %41)
%43 = tail call i32 @write(i32 %12, i8* %5, i32 22)
%44 = add nuw nsw i32 %26, 1
%45 = icmp eq i32 %44, %24
br i1 %45, label %46, label %25
46: ; preds = %37, %25
%47 = tail call i32 @close(i32 %8)
%48 = load i32, i32* @SEEK_SET
%49 = tail call i32 @lseek(i32 %12, i32 0, i32 %48)
br i1 %21, label %50, label %64
50: ; preds = %46
%51 = call i32 @llvm.smax.i32(i32 %18, i32 1)
br label %52
52: ; preds = %50, %52
%53 = phi i32 [ %58, %52 ], [ 0, %50 ]
%54 = tail call i32 @read(i32 %12, i8* %5, i32 20)
%55 = sext i32 %54 to i64
%56 = getelementptr inbounds i8, i8* %5, i64 %55
store i8 0, i8* %56
%57 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.4, i64 0, i64 0), i8* %5)
%58 = add nuw nsw i32 %53, 1
%59 = icmp eq i32 %58, %51
br i1 %59, label %64, label %52
60: ; preds = %2
%61 = tail call i32 @close(i32 %8)
%62 = load i32, i32* @SEEK_SET
%63 = tail call i32 @lseek(i32 %12, i32 0, i32 %62)
br label %64
64: ; preds = %52, %60, %46
%65 = tail call i32 @close(i32 %12)
%66 = tail call i32 @putchar(i32 10)
%67 = tail call i32 @exit(i32 0)
unreachable
}