#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*/ FILE;

/* Variables and functions */
int /*<<< orphan*/ errno;
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ make_stats(int /*<<< orphan*/ *);
int /*<<< orphan*/ stderr;
char *strerror(int /*<<< orphan*/);
int /*<<< orphan*/ usage(char *);
int main(int argc, char *argv[]) {
  FILE *in;
  if (argc < 2) {
    usage(argv[0]);
    exit(0);
  }
  in = fopen(argv[1], "r");
  if (!in) {
    fprintf(stderr, "fopen: %s\n", strerror(errno));
    exit(-1);
  }
  make_stats(in);
  fclose(in);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
jge    11a3 <main+0x33>
mov    -0x10(%rbp),%rax
mov    (%rax),%rdi
call   1050 <usage@plt>
xor    %edi,%edi
call   1070 <exit@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
lea    0xe4e(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
jne    11fc <main+0x8c>
mov    0x2e13(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x1c(%rbp)
mov    0x2dff(%rip),%rax
mov    (%rax),%edi
call   1090 <strerror@plt>
mov    -0x1c(%rbp),%edi
mov    %rax,%rdx
lea    0xe15(%rip),%rsi
call   1040 <fprintf@plt>
mov    $0xffffffff,%edi
call   1070 <exit@plt>
mov    -0x18(%rbp),%rdi
call   1080 <make_stats@plt>
mov    -0x18(%rbp),%rdi
call   1030 <fclose@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x1,%edi
jle    11a2 <main+0x32>
mov    0x8(%rsi),%rdi
lea    0xe7f(%rip),%rsi
call   1060 <fopen@plt>
test   %rax,%rax
je     11b1 <main+0x41>
mov    %rax,%rbx
mov    %rax,%rdi
call   1080 <make_stats@plt>
mov    %rbx,%rdi
call   1030 <fclose@plt>
xor    %eax,%eax
pop    %rbx
ret
mov    (%rsi),%rdi
call   1050 <usage@plt>
xor    %edi,%edi
call   1070 <exit@plt>
mov    0x2e28(%rip),%rax
mov    (%rax),%ebx
mov    0x2e17(%rip),%rax
mov    (%rax),%edi
call   1090 <strerror@plt>
lea    0xe33(%rip),%rsi
mov    %ebx,%edi
mov    %rax,%rdx
call   1040 <fprintf@plt>
mov    $0xffffffff,%edi
call   1070 <exit@plt>

LLVM IR (-O0):
@.str = [2 x i8] c"r\00"
@stderr = global i32 0
@.str.1 = [11 x i8] c"fopen: %s\0A\00"
@errno = global i32 0
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32*
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp slt i32 %7, 2
br i1 %8, label %9, label %15
9: ; preds = %2
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 0
%12 = load i8*, i8** %11
%13 = call i32 @usage(i8* %12)
%14 = call i32 @exit(i32 0)
unreachable
15: ; preds = %2
%16 = load i8**, i8*** %5
%17 = getelementptr inbounds i8*, i8** %16, i64 1
%18 = load i8*, i8** %17
%19 = call i32* @fopen(i8* %18, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %19, i32** %6
%20 = load i32*, i32** %6
%21 = icmp ne i32* %20, null
br i1 %21, label %28, label %22
22: ; preds = %15
%23 = load i32, i32* @stderr
%24 = load i32, i32* @errno
%25 = call i8* @strerror(i32 %24)
%26 = call i32 @fprintf(i32 %23, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i8* %25)
%27 = call i32 @exit(i32 -1)
unreachable
28: ; preds = %15
%29 = load i32*, i32** %6
%30 = call i32 @make_stats(i32* %29)
%31 = load i32*, i32** %6
%32 = call i32 @fclose(i32* %31)
ret i32 0
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@stderr = global i32 0
@.str.1 = [11 x i8] c"fopen: %s\0A\00"
@errno = global i32 0
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %4, label %8
4: ; preds = %2
%5 = load i8*, i8** %1
%6 = tail call i32 @usage(i8* %5)
%7 = tail call i32 @exit(i32 0)
unreachable
8: ; preds = %2
%9 = getelementptr inbounds i8*, i8** %1, i64 1
%10 = load i8*, i8** %9
%11 = tail call i32* @fopen(i8* %10, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%12 = icmp eq i32* %11, null
br i1 %12, label %13, label %19
13: ; preds = %8
%14 = load i32, i32* @stderr
%15 = load i32, i32* @errno
%16 = tail call i8* @strerror(i32 %15)
%17 = tail call i32 @fprintf(i32 %14, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.1, i64 0, i64 0), i8* %16)
%18 = tail call i32 @exit(i32 -1)
unreachable
19: ; preds = %8
%20 = tail call i32 @make_stats(i32* %11)
%21 = tail call i32 @fclose(i32* %11)
ret i32 0
}