#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*/ O_RDONLY;
int /*<<< orphan*/ SEEK_CUR;
int /*<<< orphan*/ close(int);
int lseek(int, int /*<<< orphan*/, int /*<<< orphan*/);
int open(char *, int /*<<< orphan*/);
int /*<<< orphan*/ printf(char *, ...);
int main(int argc, char *argv[]) {
  int fd = -1;
  if (argc < 2) {
    printf("1 arguments needed!\n");
    return -1;
  }
  fd = open(argv[1], O_RDONLY);
  if (lseek(fd, 0, SEEK_CUR) == -1) {
    printf("%s:Cannot seek!\n", argv[1]);
  } else {
    printf("%s:Can seek!\n", argv[1]);
  }
  close(fd);
  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)
movl   $0xffffffff,-0x14(%rbp)
cmpl   $0x2,-0x8(%rbp)
jge    1181 <main+0x41>
lea    0xe92(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11f6 <main+0xb6>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
mov    0x2e50(%rip),%rax
mov    (%rax),%esi
call   1060 <open@plt>
mov    %eax,-0x14(%rbp)
mov    -0x14(%rbp),%edi
mov    0x2e44(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1040 <lseek@plt>
cmp    $0xffffffff,%eax
jne    11d1 <main+0x91>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rsi
lea    0xe50(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    11e7 <main+0xa7>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rsi
lea    0xe46(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%edi
call   1050 <close@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
cmp    $0x1,%edi
jg     116c <main+0x1c>
lea    0xebf(%rip),%rdi
call   1030 <puts@plt>
mov    $0xffffffff,%ebp
jmp    11c1 <main+0x71>
mov    %rsi,%rbx
mov    0x8(%rsi),%rdi
mov    0x2e66(%rip),%rax
mov    (%rax),%esi
call   1070 <open@plt>
mov    %eax,%r14d
mov    0x2e5d(%rip),%rax
mov    (%rax),%edx
xor    %ebp,%ebp
mov    %r14d,%edi
xor    %esi,%esi
call   1050 <lseek@plt>
cmp    $0xffffffff,%eax
mov    0x8(%rbx),%rsi
lea    0xe59(%rip),%rax
lea    0xe63(%rip),%rdi
cmove  %rax,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %r14d,%edi
call   1060 <close@plt>
mov    %ebp,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
@.str = [21 x i8] c"1 arguments needed!\0A\00"
@O_RDONLY = global i32 0
@SEEK_CUR = global i32 0
@.str.1 = [17 x i8] c"%s:Cannot seek!\0A\00"
@.str.2 = [14 x i8] c"%s:Can seek!\0A\00"
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
store i32 -1, i32* %6
%7 = load i32, i32* %4
%8 = icmp slt i32 %7, 2
br i1 %8, label %9, label %11
9: ; preds = %2
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0))
store i32 -1, i32* %3
br label %34
11: ; preds = %2
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i64 1
%14 = load i8*, i8** %13
%15 = load i32, i32* @O_RDONLY
%16 = call i32 @open(i8* %14, i32 %15)
store i32 %16, i32* %6
%17 = load i32, i32* %6
%18 = load i32, i32* @SEEK_CUR
%19 = call i32 @lseek(i32 %17, i32 0, i32 %18)
%20 = icmp eq i32 %19, -1
br i1 %20, label %21, label %26
21: ; preds = %11
%22 = load i8**, i8*** %5
%23 = getelementptr inbounds i8*, i8** %22, i64 1
%24 = load i8*, i8** %23
%25 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i8* %24)
br label %31
26: ; preds = %11
%27 = load i8**, i8*** %5
%28 = getelementptr inbounds i8*, i8** %27, i64 1
%29 = load i8*, i8** %28
%30 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0), i8* %29)
br label %31
31: ; preds = %26, %21
%32 = load i32, i32* %6
%33 = call i32 @close(i32 %32)
store i32 0, i32* %3
br label %34
34: ; preds = %31, %9
%35 = load i32, i32* %3
ret i32 %35
}

LLVM IR (-O2):
@O_RDONLY = global i32 0
@SEEK_CUR = global i32 0
@.str.1 = [17 x i8] c"%s:Cannot seek!\0A\00"
@.str.2 = [14 x i8] c"%s:Can seek!\0A\00"
@str = [20 x i8] c"1 arguments needed!\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %4, label %6
4: ; preds = %2
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @str, i64 0, i64 0))
br label %18
6: ; preds = %2
%7 = getelementptr inbounds i8*, i8** %1, i64 1
%8 = load i8*, i8** %7
%9 = load i32, i32* @O_RDONLY
%10 = tail call i32 @open(i8* %8, i32 %9)
%11 = load i32, i32* @SEEK_CUR
%12 = tail call i32 @lseek(i32 %10, i32 0, i32 %11)
%13 = icmp eq i32 %12, -1
%14 = load i8*, i8** %7
%15 = select i1 %13, i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0)
%16 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) %15, i8* %14)
%17 = tail call i32 @close(i32 %10)
br label %18
18: ; preds = %6, %4
%19 = phi i32 [ -1, %4 ], [ 0, %6 ]
ret i32 %19
}