#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*/ execl(char *, char *, int /*<<< orphan*/);
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, ...);
int /*<<< orphan*/ freopen(char *, char *, int /*<<< orphan*/);
int /*<<< orphan*/ perror(char *);
int /*<<< orphan*/ stderr;
int /*<<< orphan*/ stdin;
int main(int argc, char *argv[]) {
  char *filename;
  if (argc != 2) {
    fprintf(stderr, "usage:useupperfile\n");
    exit(1);
  }
  filename = argv[1];
  if (!freopen(filename, "r", stdin)) {
    fprintf(stderr, "could not redirect stdin from file%s", filename);
    exit(2);
  }
  execl("./upper", "upper", 0);
  perror("could not exec ./upper");
  exit(3);
}


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)
je     1191 <main+0x41>
mov    0x2e61(%rip),%rax
mov    (%rax),%edi
lea    0xe80(%rip),%rsi
mov    $0x0,%al
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1060 <exit@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rax
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rdi
mov    0x2e40(%rip),%rax
mov    (%rax),%edx
lea    0xe9d(%rip),%rsi
call   1030 <freopen@plt>
cmp    $0x0,%eax
jne    11e4 <main+0x94>
mov    0x2e12(%rip),%rax
mov    (%rax),%edi
mov    -0x18(%rbp),%rdx
lea    0xe41(%rip),%rsi
mov    $0x0,%al
call   1040 <fprintf@plt>
mov    $0x2,%edi
call   1060 <exit@plt>
lea    0xe5d(%rip),%rdi
lea    0xe58(%rip),%rsi
xor    %edx,%edx
call   1070 <execl@plt>
lea    0xe39(%rip),%rdi
call   1050 <perror@plt>
mov    $0x3,%edi
call   1060 <exit@plt>

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x2,%edi
jne    119a <main+0x4a>
mov    0x8(%rsi),%rbx
mov    0x2e87(%rip),%rax
mov    (%rax),%edx
lea    0xee4(%rip),%rsi
mov    %rbx,%rdi
call   1030 <freopen@plt>
test   %eax,%eax
jne    11bb <main+0x6b>
mov    0x2e5b(%rip),%rax
mov    (%rax),%edi
lea    0xe8e(%rip),%rsi
mov    %rbx,%rdx
xor    %eax,%eax
call   1040 <fprintf@plt>
mov    $0x2,%edi
call   1060 <exit@plt>
mov    0x2e37(%rip),%rax
mov    (%rax),%edi
lea    0xe56(%rip),%rsi
xor    %eax,%eax
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1060 <exit@plt>
lea    0xe86(%rip),%rdi
lea    0xe81(%rip),%rsi
xor    %edx,%edx
call   1070 <execl@plt>
lea    0xe62(%rip),%rdi
call   1050 <perror@plt>
mov    $0x3,%edi
call   1060 <exit@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [20 x i8] c"usage:useupperfile\0A\00"
@.str.1 = [2 x i8] c"r\00"
@stdin = global i32 0
@.str.2 = [37 x i8] c"could not redirect stdin from file%s\00"
@.str.3 = [8 x i8] c"./upper\00"
@.str.4 = [6 x i8] c"upper\00"
@.str.5 = [23 x i8] c"could not exec ./upper\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i8*
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp ne i32 %7, 2
br i1 %8, label %9, label %13
9: ; preds = %2
%10 = load i32, i32* @stderr
%11 = call i32 (i32, i8*, ...) @fprintf(i32 %10, i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0))
%12 = call i32 @exit(i32 1)
unreachable
13: ; preds = %2
%14 = load i8**, i8*** %5
%15 = getelementptr inbounds i8*, i8** %14, i64 1
%16 = load i8*, i8** %15
store i8* %16, i8** %6
%17 = load i8*, i8** %6
%18 = load i32, i32* @stdin
%19 = call i32 @freopen(i8* %17, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i32 %18)
%20 = icmp ne i32 %19, 0
br i1 %20, label %26, label %21
21: ; preds = %13
%22 = load i32, i32* @stderr
%23 = load i8*, i8** %6
%24 = call i32 (i32, i8*, ...) @fprintf(i32 %22, i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str.2, i64 0, i64 0), i8* %23)
%25 = call i32 @exit(i32 2)
unreachable
26: ; preds = %13
%27 = call i32 @execl(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.4, i64 0, i64 0), i32 0)
%28 = call i32 @perror(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.5, i64 0, i64 0))
%29 = call i32 @exit(i32 3)
unreachable
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [20 x i8] c"usage:useupperfile\0A\00"
@.str.1 = [2 x i8] c"r\00"
@stdin = global i32 0
@.str.2 = [37 x i8] c"could not redirect stdin from file%s\00"
@.str.3 = [8 x i8] c"./upper\00"
@.str.4 = [6 x i8] c"upper\00"
@.str.5 = [23 x i8] c"could not exec ./upper\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %8, label %4
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = tail call i32 (i32, i8*, ...) @fprintf(i32 %5, i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0))
%7 = tail call i32 @exit(i32 1)
unreachable
8: ; preds = %2
%9 = getelementptr inbounds i8*, i8** %1, i64 1
%10 = load i8*, i8** %9
%11 = load i32, i32* @stdin
%12 = tail call i32 @freopen(i8* %10, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0), i32 %11)
%13 = icmp eq i32 %12, 0
br i1 %13, label %14, label %18
14: ; preds = %8
%15 = load i32, i32* @stderr
%16 = tail call i32 (i32, i8*, ...) @fprintf(i32 %15, i8* getelementptr inbounds ([37 x i8], [37 x i8]* @.str.2, i64 0, i64 0), i8* %10)
%17 = tail call i32 @exit(i32 2)
unreachable
18: ; preds = %8
%19 = tail call i32 @execl(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.4, i64 0, i64 0), i32 0)
%20 = tail call i32 @perror(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.5, i64 0, i64 0))
%21 = tail call i32 @exit(i32 3)
unreachable
}