A compiler is a computer program that transforms source code written in one programming language into another computer language.

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When to use ANTLR and when to use a parsing library

I've always wanted to learn how to write a compiler - I've decided to use ANTLR, and am currently reading through the book (its very good by the way) I'm pretty new to this, so go easy, but the jist ...
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3answers
100 views

Will C compiler attach the whole object code of the header file?

When you compile a C source code does the compiler convert the whole header file to object code or just the functions of the header file you use? Like for example, in the header file #include ...
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2answers
112 views

How are ASCII code associations actually stored and retrieved?

So, I was reading about bootstrapping, compilers, and the classic example of writing support for escape sequence support came up, where a program is written with a short snippet referring each escape ...
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0answers
61 views

Loop Unfolding and Named Significant Bits

I've been writing a Parser Compiler for the last seven or so years, and I recently got to the point (yet again, never satisfied) of structuring the portion dealing with the portions of the language ...
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1answer
81 views

Allow user to enter DSL, rules or code?

I have a python library that allows me to define rules by chaining inputs and outputs of functions ( producer(grep(count( [print(),log() ] ))) This functions define a pipeline from left to right. ...
2
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3answers
129 views

Which components/phases of a JIT compiler are different from a traditional ahead of time compiler?

Besides a faster register allocation algorithm and some trade-off in control and data-flow analysis for optimization purposes, which components/phases of a JIT compiler are different from a ...
4
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2answers
238 views

Needs (in principle) C++ parenthesis around if statement condition?

In current C++ when body of if statements contain only one command then: Parenthesis around if condition are mandatory but block are optional. So, both examples are OK: if ( condition ) { return 0; ...
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4answers
193 views

Can every language be compiled? And can every language be interpreted? [duplicate]

I was wondering whether every interpreted language can be compiled? And can every compiled language be interpreted?
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2answers
165 views

Does GCC optimize code to remove useless variable read operations? [closed]

I'm using GCC on ununtu 14.04. My program is written in c++ and in a case i need to check the amount of time the program needs to read a large integer array. what is the best way to do this without ...
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3answers
332 views

How do I compile my software for all platforms from Ubuntu Linux 64 bit?

I write a lot of open source software that I make available on my website. How do I get my software compiled for all relevant platforms including: Windows OS X Linux 32 bit deb Linux 64 bit deb ...
4
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1answer
409 views

How do I add link-time optimization capabilities to my LLVM-based compiler?

I am designing and implementing a programming language, and I am using LLVM for native code generation. Among others, performance is a key feature of the language, and as such, I am looking to ...
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3answers
352 views

From a technical point of view, could JavaScript be compiled instead of interpreted?

The question title speaks for itself. I'm specifically thinking in terms of a Node.js server. Additionally, this question is assuming that you don't need eval(). Also, if this is not possible, why ...
4
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1answer
505 views

Why did GCC switch from Bison to a recursive descent parser for C++ and C?

Was there a language change that required it or some practical reason why Bison was no longer appropriate or optimal? I saw on wikipedia that they switched, referring to the GCC 3.4 and GCC 4.1 ...
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6answers
1k views

Why don't compilers inline everything? [closed]

Sometimes compilers inline function calls. That means that they move the code of the called function into the calling function. This makes things slightly faster because there's no need to push and ...
0
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2answers
96 views

How do we add software to a machine? [duplicate]

When we build a new machine, how do we add software to that machine? I know we have assemblers and compilers that convert the high-level code into machine code for it to understand. But having ...
0
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2answers
292 views

Writing a superset of a programming language as a transcompiler

My idea is to write a superset of C# (but question is not language-specific), so that it source-to-source compiles (transcompiles) to C# itself (fall-through switch clauses, default method parameters ...
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2answers
178 views

Is a book that teaches how to build compilers good for learning to implement interpreters? [closed]

I'm looking for a book to learn how to implement interpreters for programming languages. Thing is there are much more 'compiler books' than 'interpreter books'. So my question is: can I read a book ...
62
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11answers
8k views

Why is software OS specific?

I'm trying to determine the technical details of why software produced using programming languages for certain operating systems only work with them. It is my understanding that binaries are specific ...
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5answers
2k views

Do compiler-writers actually need to 'understand' machine code? [closed]

Might be kind of an odd question. A guy writing a C++ compiler (or whatever non-VM language): Does he need to be able to read/write raw machine language? How does that work? EDIT: I am specifically ...
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0answers
106 views

Succinct Lazy Initialization Pattern

Background I often use the following lazy initialization pattern: public class Clazz { private Object object; private Object getObject() { Object object = this.object; if( object == ...
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4answers
286 views

What exactly is Virtual Machine Bytecode? [closed]

I want to work on a very simple compiler for a very simple language. The compiler will compile the code to some basic bytecode. Later, a virtual machine program will run the bytecode, and execute the ...
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1answer
327 views

Creating a very basic compiler using Java

I want to try and create my own very basic language, with it's very basic compiler. All using Java. For now, it will only need to enable to 'programmer' to print things to the screen. I had an idea ...
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4answers
3k views

Why can't native machine code be easily decompiled?

With bytecode-based virtual machine languages like Java, VB.NET, C#, ActionScript 3.0, etc., you hear sometimes about how easy it is to just go download some decompiler off the Internet, run the ...
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1answer
110 views

Where can I find Turbo Pascal dialect description/reference? [closed]

Where can I find Turbo Pascal dialect description/reference? Is it still availiable in some place? I'm looking for the famous Turbo Pascal dialect description/reference(yes, the one from 80s/90s time) ...
12
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1answer
288 views

What intermediate representations can be used to reason about concurrency?

I am trying to better understand what would be required for a compiler to be able to make intelligent choices regarding concurrency on behalf of the programmer. I realize that there are many difficult ...
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0answers
79 views

What are the tools required to build a compiler? [duplicate]

What are the various tools that are required to build a compiler for a particular programming language, say C? I want to know how each part of the compiler works. So, I am trying to use all the ...
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2answers
476 views

How to safely run random binary codes? [closed]

Okay, so I am looking for a way to safely run a randomly generated binary code. I also need to be able to decompile the code. Any ideas and all programming languages are welcome. BTW it most be ...
2
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3answers
395 views

What code lays behind C++ exception?

In C and C++ you can return a single variable inside a function. Now in the case that variable is returning data, and not an error code, you can use exceptions. But how is that possible? If you data ...
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2answers
440 views

Optimizing code generation for expressions in a compiler

I don't know if this question has a simple answer or not, but I just have to ask. I'm reading this tutorial (I don't know if this is a well-known series, but it's name is 'Let's build a compiler!' by ...
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2answers
968 views

Path to learning compiler design [closed]

I'm not sure if this is an acceptable question, but compiler-os-design-where-to-start was, so I figured that I'd take a shot at it. I have taken no formal Computer Science classes. I have programmed ...
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2answers
286 views

Should I commit my generated parser to source control?

I'm using a parser generator to build a compiler. Should I commit the source files produced by the parser generator? I want to commit them to avoid a dependency on the parser generator during the ...
0
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2answers
2k views

How would I make a compiler in C++? [closed]

This probably been asked for but I can't google "How to make a compiler in C++" because I will just get "How to compile C++" as the results. Anyway, for my question, I'd like to make a simple ...
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5answers
497 views

Is it a good idea to read compiler source code? [closed]

I'm a junior in college majoring in Computer Science. Apart from writing lots of code, I want to start reading source code written by others to improve my coding skills and learn better/different ways ...
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2answers
770 views

Implementing non-fixed length array support in a compiler

I'm thinking of building a language for PIC microcontrollers. I want to be able to use non-fixed size arrays, like this: Declare the variable as int[] Wait for input from serial connection Make the ...
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3answers
10k views

Understanding stack frame of function call in C/C++?

I am trying to understand how stack frames are built and which variables (params) are pushed to stack in what order? Some search results showed that the C/C++ compiler decides based on operations ...
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1answer
1k views

What is the Ken Thompson Hack? [duplicate]

I read some stuff like cm bell labs but i couldn't get it all. How does it work really? What is the logic in that?
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3answers
385 views

Compiling multiple languages and Javascript

I have read numerous times that programming languages when making games or large software often use multiple languages / scripts together. I'm wondering how that works. How do they compile it? How ...
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3answers
500 views

Convert an interpreter to a compiler?

First off, I know this is a question asked by MANY other programmers before me. But I couldn't find any useable resource that could help me. Well, I'm creating an programming language called "Light" ...
104
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10answers
27k views

Is Ken Thompson's compiler hack still a threat?

Ken Thompson Hack (1984) Ken Thompson outlined a method for corrupting a compiler binary (and other compiled software, like a login script on a *nix system) in 1984. I was curious to know if modern ...
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3answers
534 views

What are the challenges related to typing in writing a compiler for a dynamically typed language?

In this talk, Guido van Rossum is talking (27:30) about attempts to write a compiler for Python code, commenting on it saying: turns out it's not so easy to write a compiler that maintains all the ...
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0answers
445 views

Steps in converting a grammar to LL(1) Grammar

I have the following question: Convert the following grammar into an LL(1) grammar which recognises the same language (you may assume that the grammar is unambiguous). A -> int A -> int + A A ...
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4answers
2k views

Can someone provide a short code example of compiler bootstrapping?

This Turing award lecture by Ken Thompson on topic "Reflections on Trusting Trust" gives good insight about how C compiler was made in C itself. Though I understand the crux, it still hasn't sunk in. ...
33
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6answers
16k views

Why does Facebook convert PHP code to C++? [closed]

I read that Facebook started out in PHP, and then to gain speed, they now compile PHP as C++ code. If that's the case why don't they: Just program in c++? Surely there must be SOME errors/bugs when ...
2
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1answer
349 views

Brief explanation for executables in a GNU/Clang Toolchain?

I roughly understand that cc, ld and other parts are called in a certain sequence according to schemes like Makefiles etc. Some of those commands are used to generate those configs and Makefiles. And ...
2
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1answer
754 views

Do compilers have to be written for each model of CPU?

Do you need to take account of the different processors and their instructions when writing a compiler? Have instructions been standardised? Or what tools and techniques are available to assist with ...
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5answers
944 views

why compiler design/coding design considered the highest level activity in programming? [closed]

In some recent articles I have read I have found that in the programming ladder compiler design is always considered as highest level activity. Why is this so? Why not database design or network ...
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5answers
43k views

How to write a very basic compiler

Advanced compilers like gcc compile codes into machine readable files according to the language in which the code has been written (e.g. C, C++, etc). In fact, they interpret the meaning of each codes ...
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6answers
1k views

Can I get a C++ Compiler to instantiate objects at compile time

I am writing some code that has a very large number of reasonably simple objects and I would like them the be created at compile time. I would think that a compiler would be able to do this, but I ...
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5answers
2k views

How are operators organized in memory

How are operators organized/saved in the memory in context of a programming language. Are they procedures/functions saved somewhere and compilers just manipulate things to call these procs whenever ...
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4answers
1k views

Programming Language Parser (in Java) - What would be a better design alternative for a special case?

Background I'm currently designing my own programming language as a research project. I have most of the grammar done and written down as context-free grammar, and it should be working as is. - Now ...