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|
//"use strict";
// LLVM => JavaScript compiler, main entry point
try {
// On SpiderMonkey, prepare a large amount of GC space
gcparam('maxBytes', 1024*1024*1024);
} catch(e) {}
// The environment setup code appears here, in shell.js, in js_optimizer.js and in tests/hello_world.js because it can't be shared. Keep them in sync!
// *** Environment setup code ***
var arguments_ = [];
var ENVIRONMENT_IS_NODE = typeof process === 'object';
var ENVIRONMENT_IS_WEB = typeof window === 'object';
var ENVIRONMENT_IS_WORKER = typeof importScripts === 'function';
var ENVIRONMENT_IS_SHELL = !ENVIRONMENT_IS_WEB && !ENVIRONMENT_IS_NODE && !ENVIRONMENT_IS_WORKER;
if (ENVIRONMENT_IS_NODE) {
// Expose functionality in the same simple way that the shells work
print = function(x) {
process['stdout'].write(x + '\n');
};
printErr = function(x) {
process['stderr'].write(x + '\n');
};
var nodeFS = require('fs');
read = function(filename) {
var ret = nodeFS['readFileSync'](filename).toString();
if (!ret && filename[0] != '/') {
filename = __dirname.split('/').slice(0, -1).join('/') + '/src/' + filename;
ret = nodeFS['readFileSync'](filename).toString();
}
return ret;
};
arguments_ = process['argv'].slice(2);
} else if (ENVIRONMENT_IS_SHELL) {
// Polyfill over SpiderMonkey/V8 differences
if (!this['read']) {
read = function(f) { snarf(f) };
}
if (!this['arguments']) {
arguments_ = scriptArgs;
} else {
arguments_ = arguments;
}
} else if (ENVIRONMENT_IS_WEB) {
print = printErr = function(x) {
console.log(x);
};
read = function(url) {
var xhr = new XMLHttpRequest();
xhr.open('GET', url, false);
xhr.send(null);
return xhr.responseText;
};
if (this['arguments']) {
arguments_ = arguments;
}
} else if (ENVIRONMENT_IS_WORKER) {
// We can do very little here...
load = importScripts;
} else {
throw 'Unknown runtime environment. Where are we?';
}
function globalEval(x) {
eval.call(null, x);
}
if (typeof load == 'undefined' && typeof read != 'undefined') {
load = function(f) {
globalEval(read(f));
};
}
if (typeof printErr === 'undefined') {
printErr = function(){};
}
if (typeof print === 'undefined') {
print = printErr;
}
// *** Environment setup code ***
// Basic utilities
load('utility.js');
// Load settings, can be overridden by commandline
load('settings.js');
var settings_file = arguments_[0];
var ll_file = arguments_[1];
if (settings_file) {
var settings = JSON.parse(read(settings_file));
for (setting in settings) {
eval(setting + ' = ' + JSON.stringify(settings[setting]));
}
}
if (CORRECT_SIGNS >= 2) {
CORRECT_SIGNS_LINES = set(CORRECT_SIGNS_LINES); // for fast checking
}
if (CORRECT_OVERFLOWS >= 2) {
CORRECT_OVERFLOWS_LINES = set(CORRECT_OVERFLOWS_LINES); // for fast checking
}
if (CORRECT_ROUNDINGS >= 2) {
CORRECT_ROUNDINGS_LINES = set(CORRECT_ROUNDINGS_LINES); // for fast checking
}
if (SAFE_HEAP >= 2) {
SAFE_HEAP_LINES = set(SAFE_HEAP_LINES); // for fast checking
}
if (PGO) { // by default, correct everything during PGO
CORRECT_SIGNS = CORRECT_SIGNS || 1;
CORRECT_OVERFLOWS = CORRECT_OVERFLOWS || 1;
CORRECT_ROUNDINGS = CORRECT_ROUNDINGS || 1;
}
EXPORTED_FUNCTIONS = set(EXPORTED_FUNCTIONS);
EXPORTED_GLOBALS = set(EXPORTED_GLOBALS);
// Settings sanity checks
assert(!(USE_TYPED_ARRAYS === 2 && QUANTUM_SIZE !== 4), 'For USE_TYPED_ARRAYS == 2, must have normal QUANTUM_SIZE of 4');
// Output some info and warnings based on settings
if (!MICRO_OPTS || !RELOOP || ASSERTIONS || CHECK_SIGNS || CHECK_OVERFLOWS || INIT_STACK || INIT_HEAP ||
!SKIP_STACK_IN_SMALL || SAFE_HEAP || PGO || PROFILE || !DISABLE_EXCEPTION_CATCHING) {
print('// Note: Some Emscripten settings will significantly limit the speed of the generated code.');
} else {
print('// Note: For maximum-speed code, see "Optimizing Code" on the Emscripten wiki, https://github.com/kripken/emscripten/wiki/Optimizing-Code');
}
if (DOUBLE_MODE || I64_MODE || CORRECT_SIGNS || CORRECT_OVERFLOWS || CORRECT_ROUNDINGS) {
print('// Note: Some Emscripten settings may limit the speed of the generated code.');
}
// Load compiler code
load('framework.js');
load('modules.js');
load('parseTools.js');
load('intertyper.js');
load('analyzer.js');
load('jsifier.js');
globalEval(processMacros(preprocess(read('runtime.js'))));
Runtime.QUANTUM_SIZE = QUANTUM_SIZE;
//===============================
// Main
//===============================
// Read llvm
var raw = read(ll_file);
if (FAKE_X86_FP80) {
raw = raw.replace(/x86_fp80/g, 'double');
}
var lines = raw.split('\n');
raw = null;
// Pre-process the LLVM assembly
Debugging.handleMetadata(lines);
PreProcessor.eliminateUnneededIntrinsics(lines);
// Do it
var intertyped = intertyper(lines);
lines = null;
var analyzed = analyzer(intertyped);
intertyped = null;
JSify(analyzed);
if (DEBUG_MEMORY) {
print('zzz. last gc: ' + gc());
MemoryDebugger.dump();
print('zzz. hanging now!');
while(1){};
}
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