8cc on SQLite3

This is a SQLite3 port of 8cc built on ELVM.

The compiler is implemented in a SELECT statement using recursive common table expression.

Requirements

SQLite3 shell (ver.3.9.0 or later) with JSON1 extension enabled

Warning
ver 3.39.0 or later is strongly recommended
ver 3.35.0 ~ 3.38.5 creates a huge temporary file (over 100GiB) by CTE-materialization feature.
ref. SQLite - The WITH Clause - Materialization Hints
Fixed in ver 3.39.0 to avoid unnecessary materialization.

Build

$ git clone https://github.com/youz/8cc-sqlite3.git
$ make

You'll get a database binary file elvm.db3. Or get the pre-built binary from here.

DB objects

Tables

• src(b BLOB) - C source table
• eir(b BLOB) - ELVM IR table
• option(target TEXT) - Option table

Views

• elvm_8cc(stdout TEXT) - C compiler (compiles C to ELVM IR)
• elvm_elc(stdout TEXT) - ELVM IR assembler
• elvm_8cc_elc(stdout TEXT) - pipelining 8cc & elc

Usage

Import C source code

$ sqlite3 elvm.db3
sqlite3> DELETE FROM src;
sqlite3> INSERT INTO src(b) VALUES('
int putchar(int);
int main() {
  char* p = "Hello, world!\n";
  for (; *p; p++) {
    putchar(*p);
  }
  return 0;
}');

or use readfile function.

sqlite3> DELETE FROM src;
sqlite3> INSERT INTO src(b) VALUES(readfile('samples/hello.c'));

Caution: Don't use #include directive in the C source

Compile C to ELVM IR

Select stdout from the view elvm_8cc and insert it into the table eir(b BLOB).

sqlite3> DELETE FROM eir;
sqlite3> INSERT INTO eir(b) SELECT stdout FROM elvm_8cc;

Caution: It takes a few minutes to compile a hello world program

Assemble ELVM IR to a target language

Set an alias-string for a target language to option.target. See Language List for details of alias strings.

Then select stdout from the view elvm_elc.

sqlite3> UPDATE option SET target = 'rb';
sqlite3> SELECT writefile('hello.rb', stdout) FROM elvm_elc;

Compile and assmeble at one time

Use the view elvm_8cc_elc

sqlite3> DELETE FROM src;
sqlite3> INSERT INTO src(b) VALUES(readfile('source.c'));
sqlite3> UPDATE option SET target = 'js';
sqlite3> SELECT writefile('output.js', stdout) FROM elvm_8cc_elc;

Supported target languages

alias	target language
arm	arm-linux
bef	Befunge
bf	Brainfuck
c	C
cl	CommonLisp
cpp	C++14 (compile-time)
cr	Crystal (compile-time)
el	Emacs Lisp
forth	Forth
go	Go
i	C-INTERCAL
java	Java
js	JavaScript
php	PHP
piet	Piet
pietasm	Piet Assembler
pl	Perl5
py	Python
rb	Ruby
sed	sed
sh	Bash
sqlite3	SQLite3
swift	Swift
tex	TeX
tf	TensorFlow (WIP)
tm	Turing machine
unl	Unlambda
vim	Vim script
ws	Whitespace
x86	i386-linux

This list is based on ELVM revision e99b36e53bfd9c5721c579d143ac052cf94cdb17.