#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*/ dumpBytes(int /*<<< orphan*/ *);
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ printf(char *);
int main(int argc, char *argv[]) {
  FILE *f;
  if (argc < 2 || !(f = fopen(argv[1], "rb"))) {
    printf("Gimme a file name.\n");
    exit(1);
  }
  dumpBytes(f);
  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)
jl     1182 <main+0x42>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
lea    0xe91(%rip),%rsi
call   1040 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmp    $0x0,%rax
jne    1198 <main+0x58>
lea    0xe7a(%rip),%rdi
call   1030 <printf@plt>
mov    $0x1,%edi
call   1050 <exit@plt>
mov    -0x18(%rbp),%rdi
call   1060 <dumpBytes@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
cmp    $0x2,%edi
jl     1167 <main+0x27>
mov    0x8(%rsi),%rdi
lea    0xeaf(%rip),%rsi
call   1040 <fopen@plt>
test   %rax,%rax
je     1167 <main+0x27>
mov    %rax,%rdi
call   1060 <dumpBytes@plt>
xor    %eax,%eax
pop    %rcx
ret
lea    0xe95(%rip),%rdi
call   1030 <puts@plt>
mov    $0x1,%edi
call   1050 <exit@plt>

LLVM IR (-O0):
@.str = [3 x i8] c"rb\00"
@.str.1 = [20 x i8] c"Gimme a file name.\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
%7 = load i32, i32* %4
%8 = icmp slt i32 %7, 2
br i1 %8, label %15, label %9
9: ; preds = %2
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 1
%12 = load i8*, i8** %11
%13 = call i32* @fopen(i8* %12, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32* %13, i32** %6
%14 = icmp ne i32* %13, null
br i1 %14, label %18, label %15
15: ; preds = %9, %2
%16 = call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0))
%17 = call i32 @exit(i32 1)
unreachable
18: ; preds = %9
%19 = load i32*, i32** %6
%20 = call i32 @dumpBytes(i32* %19)
ret i32 0
}

LLVM IR (-O2):
@.str = [3 x i8] c"rb\00"
@str = [19 x i8] c"Gimme a file name.\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %9, label %4
4: ; preds = %2
%5 = getelementptr inbounds i8*, i8** %1, i64 1
%6 = load i8*, i8** %5
%7 = tail call i32* @fopen(i8* %6, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%8 = icmp eq i32* %7, null
br i1 %8, label %9, label %12
9: ; preds = %4, %2
%10 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @str, i64 0, i64 0))
%11 = tail call i32 @exit(i32 1)
unreachable
12: ; preds = %4
%13 = tail call i32 @dumpBytes(i32* %7)
ret i32 0
}