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1985 lines (1822 loc) · 85.9 KB
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//"use strict";
// Convert analyzed data to javascript. Everything has already been calculated
// before this stage, which just does the final conversion to JavaScript.
// Handy sets
var STRUCT_LIST = set('struct', 'list');
var RELOOP_IGNORED_LASTS = set('return', 'unreachable', 'resume');
var addedLibraryItems = {};
var asmLibraryFunctions = [];
var SETJMP_LABEL = -1;
var INDENTATION = ' ';
var functionStubSigs = {};
// JSifier
function JSify(data, functionsOnly) {
//B.start('jsifier');
var mainPass = !functionsOnly;
var itemsDict = { type: [], GlobalVariableStub: [], functionStub: [], function: [], GlobalVariable: [], GlobalVariablePostSet: [] };
if (mainPass) {
var shellFile = SHELL_FILE ? SHELL_FILE : (BUILD_AS_SHARED_LIB || SIDE_MODULE ? 'shell_sharedlib.js' : 'shell.js');
if (phase == 'pre' || phase == 'glue') {
// We will start to print out the data, but must do so carefully - we are
// dealing with potentially *huge* strings. Convenient replacements and
// manipulations may create in-memory copies, and we may OOM.
//
// Final shape that will be created:
// shell
// (body)
// preamble
// runtime
// generated code
// postamble
// global_vars
//
// First, we print out everything until the generated code. Then the
// functions will print themselves out as they are parsed. Finally, we
// will call finalCombiner in the main pass, to print out everything
// else. This lets us not hold any strings in memory, we simply print
// things out as they are ready.
var shellParts = read(shellFile).split('{{BODY}}');
print(processMacros(preprocess(shellParts[0])));
var preFile = BUILD_AS_SHARED_LIB || SIDE_MODULE ? 'preamble_sharedlib.js' : 'preamble.js';
var pre = processMacros(preprocess(read(preFile).replace('{{RUNTIME}}', getRuntime())));
print(pre);
// Populate implementedFunctions. Note that this is before types, and will be updated later.
data.unparsedFunctions.forEach(function(func) {
Functions.implementedFunctions[func.ident] = Functions.getSignature(func.returnType, func.params.map(function(param) { return param.type }));
});
}
}
if (mainPass) {
// Handle unparsed types TODO: Batch them
analyzer(intertyper(data.unparsedTypess[0].lines, true), true);
data.unparsedTypess = null;
// Add additional necessary items for the main pass. We can now do this since types are parsed (types can be used through
// generateStructInfo in library.js)
//B.start('jsifier-libload');
LibraryManager.load();
//B.stop('jsifier-libload');
if (phase == 'pre' || phase == 'glue') {
var libFuncsToInclude;
if (INCLUDE_FULL_LIBRARY) {
assert(!(BUILD_AS_SHARED_LIB || SIDE_MODULE), 'Cannot have both INCLUDE_FULL_LIBRARY and BUILD_AS_SHARED_LIB/SIDE_MODULE set.')
libFuncsToInclude = [];
for (var key in LibraryManager.library) {
if (!key.match(/__(deps|postset|inline|asm|sig)$/)) {
libFuncsToInclude.push(key);
}
}
} else {
libFuncsToInclude = DEFAULT_LIBRARY_FUNCS_TO_INCLUDE;
}
libFuncsToInclude.forEach(function(ident) {
data.functionStubs.push({
intertype: 'functionStub',
ident: '_' + ident
});
});
}
}
// Functions
if (phase == 'funcs') { // || phase == 'pre') { // pre has function shells, just to defined implementedFunctions
var MAX_BATCH_FUNC_LINES = 1000;
while (data.unparsedFunctions.length > 0) {
var currFuncLines = [];
var currBaseLineNums = [];
while (currFuncLines.length == 0 ||
(data.unparsedFunctions.length > 0 && currFuncLines.length + data.unparsedFunctions[0].lines.length <= MAX_BATCH_FUNC_LINES)) {
currBaseLineNums.push([currFuncLines.length, data.unparsedFunctions[0].lineNum-1]);
currFuncLines = currFuncLines.concat(data.unparsedFunctions[0].lines); // for first one, assign, do not concat?
data.unparsedFunctions.shift();
}
dprint('unparsedFunctions','====================\n// Processing function batch of ' + currBaseLineNums.length +
' functions, ' + currFuncLines.length + ' lines, functions left: ' + data.unparsedFunctions.length);
if (DEBUG_MEMORY) MemoryDebugger.tick('pre-func');
JSify(analyzer(intertyper(currFuncLines, true, currBaseLineNums), true), true);
if (DEBUG_MEMORY) MemoryDebugger.tick('post-func');
}
currFuncLines = currBaseLineNums = null; // Do not hold on to anything from inside that loop (JS function scoping..)
data.unparsedFunctions = null;
}
// Actors
function makeEmptyStruct(type) {
var ret = [];
var typeData = Types.types[type];
assertTrue(typeData);
for (var i = 0; i < typeData.flatSize; i++) {
ret.push(0);
}
return ret;
}
function alignStruct(values, type) {
var typeData = Types.types[type];
assertTrue(typeData);
var ret = new Array(typeData.flatSize);
var index = 0;
var i = 0;
while (i < values.length) {
// Pad until the right place
var padded = typeData.flatFactor ? typeData.flatFactor*i : typeData.flatIndexes[i];
while (index < padded) {
ret[index++] = 0;
}
// Add current value(s)
var currValue = values[i];
if (USE_TYPED_ARRAYS == 2 && (typeData.fields[i] == 'i64' || (typeData.flatFactor && typeData.fields[0] == 'i64'))) {
// 'flatten' out the 64-bit value into two 32-bit halves
var parts = parseI64Constant(currValue, true);
ret[index++] = parts[0];
ret[index++] = 0;
ret[index++] = 0;
ret[index++] = 0;
ret[index++] = parts[1];
ret[index++] = 0;
ret[index++] = 0;
ret[index++] = 0;
} else {
currValue = flatten(currValue);
if (typeof currValue == 'object') {
for (var j = 0; j < currValue.length; j++) {
ret[index++] = currValue[j];
}
} else {
ret[index++] = currValue;
}
}
i += 1;
}
while (index < typeData.flatSize) {
ret[index++] = 0;
}
return ret;
}
// Gets an entire constant expression
function makeConst(value, type, ident) {
// Gets an array of constant items, separated by ',' tokens
function handleSegments(tokens) {
// Handle a single segment (after comma separation)
function handleSegment(segment) {
var ret;
if (segment.intertype === 'value') {
ret = segment.ident;
} else if (segment.intertype === 'emptystruct') {
ret = makeEmptyStruct(segment.type);
} else if (segment.intertype in PARSABLE_LLVM_FUNCTIONS) {
ret = finalizeLLVMFunctionCall(segment);
} else if (segment.intertype in STRUCT_LIST) {
ret = alignStruct(handleSegments(segment.contents), segment.type);
} else if (segment.intertype === 'string') {
ret = parseLLVMString(segment.text); // + ' /* ' + text + '*/';
} else if (segment.intertype === 'blockaddress') {
ret = finalizeBlockAddress(segment);
} else {
throw 'Invalid segment: ' + dump(segment);
}
assert(segment.type, 'Missing type for constant segment!');
return makeGlobalUse(indexizeFunctions(ret, segment.type));
};
return tokens.map(handleSegment)
}
//dprint('jsifier const: ' + JSON.stringify(value) + ',' + type + '\n');
if (value.intertype in PARSABLE_LLVM_FUNCTIONS) {
return [finalizeLLVMFunctionCall(value)];
} else if (Runtime.isNumberType(type) || pointingLevels(type) >= 1) {
return [makeGlobalUse(indexizeFunctions(parseNumerical(value.value), type))];
} else if (value.intertype === 'emptystruct') {
return makeEmptyStruct(type);
} else if (value.intertype === 'string') {
return parseLLVMString(value.text);
} else {
return alignStruct(handleSegments(value.contents), type);
}
}
function parseConst(value, type, ident) {
var constant = makeConst(value, type);
// Sadly, we've thrown away type information in makeConst, so we're not
// passing correct type info to parseNumerical which works around this
// lack.
constant = flatten(constant).map(function(x) { return parseNumerical(x) })
return constant;
}
// globalVariable
function globalVariableHandler(item) {
function needsPostSet(value) {
if (typeof value !== 'string') return false;
// (' is ok, as it is something we can indexize later into a concrete int: ('{{ FI_ ...
return /^([(_][^']|CHECK_OVERFLOW|GLOBAL).*/.test(value);
}
item.intertype = 'GlobalVariableStub';
itemsDict.GlobalVariableStub.push(item);
assert(!item.lines); // FIXME remove this, after we are sure it isn't needed
if (item.ident == '_llvm_global_ctors') {
item.JS = '\n/* global initializers */ __ATINIT__.push(' +
item.ctors.map(function(ctor) { return '{ func: function() { ' + ctor + '() } }' }).join(',') +
');\n';
return;
}
var constant = null;
var allocator = (BUILD_AS_SHARED_LIB && !item.external) ? 'ALLOC_NORMAL' : 'ALLOC_STATIC';
var index = null;
if (item.external && BUILD_AS_SHARED_LIB) {
// External variables in shared libraries should not be declared as
// they would shadow similarly-named globals in the parent.
item.JS = '';
} else {
item.JS = makeGlobalDef(item.ident);
}
if (!NAMED_GLOBALS && isIndexableGlobal(item.ident)) {
index = makeGlobalUse(item.ident); // index !== null indicates we are indexing this
allocator = 'ALLOC_NONE';
}
Variables.globals[item.ident].named = item.named;
if (ASM_JS && (MAIN_MODULE || SIDE_MODULE) && !item.private_ && !NAMED_GLOBALS && isIndexableGlobal(item.ident)) {
// We need this to be named (and it normally would not be), so that it can be linked to and used from other modules
Variables.globals[item.ident].linkable = 1;
}
if (isBSS(item)) {
// If using indexed globals, go ahead and early out (no need to explicitly
// initialize).
if (!NAMED_GLOBALS) return;
// If using named globals, we can at least shorten the call to allocate by
// passing an integer representing the size of memory to alloc instead of
// an array of 0s of size length.
constant = Runtime.alignMemory(calcAllocatedSize(item.type));
} else {
if (item.external) {
if (LibraryManager.library[item.ident.slice(1)]) {
constant = LibraryManager.library[item.ident.slice(1)];
} else if (Runtime.isNumberType(item.type) || isPointerType(item.type)) {
constant = zeros(Runtime.getNativeFieldSize(item.type));
} else {
constant = makeEmptyStruct(item.type);
}
} else {
constant = parseConst(item.value, item.type, item.ident);
}
// This is a flattened object. We need to find its idents, so they can be assigned to later
if (typeof constant === 'object') {
var structTypes = null;
constant.forEach(function(value, i) {
if (needsPostSet(value)) { // ident, or expression containing an ident
if (!structTypes) structTypes = generateStructTypes(item.type);
itemsDict.GlobalVariablePostSet.push({
intertype: 'GlobalVariablePostSet',
JS: makeSetValue(makeGlobalUse(item.ident), i, value, structTypes[i], false, true) + ';' // ignore=true, since e.g. rtti and statics cause lots of safe_heap errors
});
constant[i] = '0';
} else {
if (typeof value === 'string') constant[i] = deParenCarefully(value);
}
});
}
if (item.external) {
// External variables in shared libraries should not be declared as
// they would shadow similarly-named globals in the parent, so do nothing here.
if (BUILD_AS_SHARED_LIB) return;
if (SIDE_MODULE) {
itemsDict.GlobalVariableStub.pop(); // remove this item
return;
}
// Library items need us to emit something, but everything else requires nothing.
if (!LibraryManager.library[item.ident.slice(1)]) return;
}
// ensure alignment
if (typeof constant === 'object') {
var extra = Runtime.alignMemory(constant.length) - constant.length;
if (item.ident.substr(0, 5) == '__ZTV') extra += Runtime.alignMemory(QUANTUM_SIZE);
while (extra-- > 0) constant.push(0);
}
}
// NOTE: This is the only place that could potentially create static
// allocations in a shared library.
if (typeof constant !== 'string') {
constant = makePointer(constant, null, allocator, item.type, index);
}
var js = (index !== null ? '' : item.ident + '=') + constant;
if (js) js += ';';
if (!ASM_JS && NAMED_GLOBALS && (EXPORT_ALL || (item.ident in EXPORTED_GLOBALS))) {
js += '\nModule["' + item.ident + '"] = ' + item.ident + ';';
}
if (BUILD_AS_SHARED_LIB == 2 && !item.private_) {
// TODO: make the assert conditional on ASSERTIONS
js += 'if (globalScope) { assert(!globalScope["' + item.ident + '"]); globalScope["' + item.ident + '"] = ' + item.ident + ' }';
}
if (item.external && !NAMED_GLOBALS) {
js = 'var ' + item.ident + '=' + js; // force an explicit naming, even if unnamed globals, for asm forwarding
}
itemsDict.GlobalVariableStub.push({
intertype: 'GlobalVariable',
JS: js,
});
}
// alias
function aliasHandler(item) {
item.intertype = 'GlobalVariableStub';
itemsDict.GlobalVariableStub.push(item);
item.JS = 'var ' + item.ident + ';';
// Set the actual value in a postset, since it may be a global variable. We also order by dependencies there
Variables.globals[item.ident].targetIdent = item.value.ident;
var value = Variables.globals[item.ident].resolvedAlias = finalizeLLVMParameter(item.value);
if ((MAIN_MODULE || SIDE_MODULE) && isFunctionType(item.type)) {
var target = item.value.ident;
if (!Functions.aliases[target]) Functions.aliases[target] = [];
Functions.aliases[target].push(item.ident);
}
}
function processLibraryFunction(snippet, ident) {
snippet = snippet.toString();
assert(snippet.indexOf('XXX missing C define') == -1,
'Trying to include a library function with missing C defines: ' + ident + ' | ' + snippet);
// name the function; overwrite if it's already named
snippet = snippet.replace(/function(?:\s+([^(]+))?\s*\(/, 'function _' + ident + '(');
if (LIBRARY_DEBUG && !LibraryManager.library[ident + '__asm']) {
snippet = snippet.replace('{', '{ var ret = (function() { if (Runtime.debug) Module.printErr("[library call:' + ident + ': " + Array.prototype.slice.call(arguments).map(Runtime.prettyPrint) + "]"); ');
snippet = snippet.substr(0, snippet.length-1) + '}).apply(this, arguments); if (Runtime.debug && typeof ret !== "undefined") Module.printErr(" [ return:" + Runtime.prettyPrint(ret)); return ret; \n}';
}
return snippet;
}
// functionStub
function functionStubHandler(item) {
// note the signature
if (item.returnType && item.params) {
functionStubSigs[item.ident] = Functions.getSignature(item.returnType.text, item.params.map(function(arg) { return arg.type }), false);
}
function addFromLibrary(ident, notDep) {
if (ident in addedLibraryItems) return '';
addedLibraryItems[ident] = true;
// dependencies can be JS functions, which we just run
if (typeof ident == 'function') return ident();
// Don't replace implemented functions with library ones (which can happen when we add dependencies).
// Note: We don't return the dependencies here. Be careful not to end up where this matters
if (('_' + ident) in Functions.implementedFunctions) return '';
if (!LibraryManager.library.hasOwnProperty(ident) && !LibraryManager.library.hasOwnProperty(ident + '__inline')) {
if (notDep) {
if (VERBOSE || ident.substr(0, 11) !== 'emscripten_') { // avoid warning on emscripten_* functions which are for internal usage anyhow
if (ERROR_ON_UNDEFINED_SYMBOLS) error('unresolved symbol: ' + ident);
else if (VERBOSE || (WARN_ON_UNDEFINED_SYMBOLS && !LINKABLE)) warn('unresolved symbol: ' + ident);
}
}
// emit a stub that will fail at runtime
LibraryManager.library[shortident] = new Function("Module['printErr']('missing function: " + shortident + "'); abort(-1);");
}
var snippet = LibraryManager.library[ident];
var redirectedIdent = null;
var deps = LibraryManager.library[ident + '__deps'] || [];
deps.forEach(function(dep) {
if (typeof snippet === 'string' && !(dep in LibraryManager.library)) warn('missing library dependency ' + dep + ', make sure you are compiling with the right options (see #ifdefs in src/library*.js)');
});
var isFunction = false;
if (typeof snippet === 'string') {
var target = LibraryManager.library[snippet];
if (target) {
// Redirection for aliases. We include the parent, and at runtime make ourselves equal to it.
// This avoid having duplicate functions with identical content.
redirectedIdent = snippet;
deps.push(snippet);
snippet = '_' + snippet;
}
// In asm, we need to know about library functions. If there is a target, though, then no
// need to consider this a library function - we will call directly to it anyhow
if (ASM_JS && !redirectedIdent && (typeof target == 'function' || /Math_\w+/.exec(snippet))) {
Functions.libraryFunctions[ident] = 1;
}
} else if (typeof snippet === 'object') {
snippet = stringifyWithFunctions(snippet);
} else if (typeof snippet === 'function') {
isFunction = true;
snippet = processLibraryFunction(snippet, ident);
if (ASM_JS) Functions.libraryFunctions[ident] = 1;
}
var postsetId = ident + '__postset';
var postset = LibraryManager.library[postsetId];
if (postset && !addedLibraryItems[postsetId] && !SIDE_MODULE) {
addedLibraryItems[postsetId] = true;
itemsDict.GlobalVariablePostSet.push({
intertype: 'GlobalVariablePostSet',
JS: postset
});
}
if (redirectedIdent) {
deps = deps.concat(LibraryManager.library[redirectedIdent + '__deps'] || []);
}
if (ASM_JS) {
// In asm, dependencies implemented in C might be needed by JS library functions.
// We don't know yet if they are implemented in C or not. To be safe, export such
// special cases.
[LIBRARY_DEPS_TO_AUTOEXPORT].forEach(function(special) {
deps.forEach(function(dep) {
if (dep == special && !EXPORTED_FUNCTIONS[dep]) {
EXPORTED_FUNCTIONS[dep] = 1;
}
});
});
}
// $ident's are special, we do not prefix them with a '_'.
if (ident[0] === '$') {
ident = ident.substr(1);
} else {
ident = '_' + ident;
}
if (VERBOSE) printErr('adding ' + ident + ' and deps ' + deps + ' : ' + (snippet + '').substr(0, 40));
var depsText = (deps ? '\n' + deps.map(addFromLibrary).filter(function(x) { return x != '' }).join('\n') : '');
var contentText = isFunction ? snippet : ('var ' + ident + '=' + snippet + ';');
if (ASM_JS) {
var sig = LibraryManager.library[ident.substr(1) + '__sig'];
if (isFunction && sig && LibraryManager.library[ident.substr(1) + '__asm']) {
// asm library function, add it as generated code alongside the generated code
Functions.implementedFunctions[ident] = sig;
asmLibraryFunctions.push(contentText);
contentText = ' ';
EXPORTED_FUNCTIONS[ident] = 1;
Functions.libraryFunctions[ident.substr(1)] = 2;
}
}
if (SIDE_MODULE) return ';'; // we import into the side module js library stuff from the outside parent
if ((!ASM_JS || phase == 'pre' || phase == 'glue') &&
(EXPORT_ALL || (ident in EXPORTED_FUNCTIONS))) {
contentText += '\nModule["' + ident + '"] = ' + ident + ';';
}
return depsText + contentText;
}
itemsDict.functionStub.push(item);
if (IGNORED_FUNCTIONS.indexOf(item.ident) >= 0) return;
var shortident = item.ident.substr(1);
if (BUILD_AS_SHARED_LIB) {
// Shared libraries reuse the runtime of their parents.
item.JS = '';
} else {
// If this is not linkable, anything not in the library is definitely missing
if (item.ident in DEAD_FUNCTIONS) {
if (LibraryManager.library[shortident + '__asm']) {
warn('cannot kill asm library function ' + item.ident);
} else {
LibraryManager.library[shortident] = new Function("Module['printErr']('dead function: " + shortident + "'); abort(-1);");
delete LibraryManager.library[shortident + '__inline'];
delete LibraryManager.library[shortident + '__deps'];
}
}
item.JS = addFromLibrary(shortident, true);
}
}
// function splitter
function functionSplitter(item) {
item.lines.forEach(function(line) {
//B.start('jsifier-handle-' + line.intertype);
Framework.currItem = line;
line.funcData = item; // TODO: remove all these, access it globally
switch (line.intertype) {
case 'value': line.JS = valueHandler(line); break;
case 'noop': line.JS = noopHandler(line); break;
case 'var': line.JS = varHandler(line); break;
case 'store': line.JS = storeHandler(line); break;
case 'deleted': line.JS = deletedHandler(line); break;
case 'branch': line.JS = branchHandler(line); break;
case 'switch': line.JS = switchHandler(line); break;
case 'return': line.JS = returnHandler(line); break;
case 'resume': line.JS = resumeHandler(line); break;
case 'invoke': line.JS = invokeHandler(line); break;
case 'atomic': line.JS = atomicHandler(line); break;
case 'landingpad': line.JS = landingpadHandler(line); break;
case 'load': line.JS = loadHandler(line); break;
case 'extractvalue': line.JS = extractvalueHandler(line); break;
case 'insertvalue': line.JS = insertvalueHandler(line); break;
case 'insertelement': line.JS = insertelementHandler(line); break;
case 'extracttelement': line.JS = extractelementHandler(line); break;
case 'shufflevector': line.JS = shufflevectorHandler(line); break;
case 'indirectbr': line.JS = indirectbrHandler(line); break;
case 'alloca': line.JS = allocaHandler(line); break;
case 'va_arg': line.JS = va_argHandler(line); break;
case 'mathop': line.JS = mathopHandler(line); break;
case 'bitcast': line.JS = bitcastHandler(line); break;
case 'getelementptr': line.JS = getelementptrHandler(line); break;
case 'call': line.JS = callHandler(line); break;
case 'unreachable': line.JS = unreachableHandler(line); break;
default: throw 'what is this line? ' + dump(line);
}
//if (ASM_JS) assert(line.JS.indexOf('var ') < 0, dump(line));
if (line.assignTo) makeAssign(line);
Framework.currItem = null;
//B.stop('jsifier-handle-' + line.intertype);
});
//B.start('jsifier-frec');
functionReconstructor(item);
//B.stop('jsifier-frec');
}
// function for filtering functions for label debugging
if (LABEL_FUNCTION_FILTERS.length > 0) {
var LABEL_FUNCTION_FILTER_SET = set(LABEL_FUNCTION_FILTERS);
var functionNameFilterTest = function(ident) {
return (ident in LABEL_FUNCTION_FILTER_SET);
};
} else {
// no filters are specified, all function names are printed
var functionNameFilterTest = function(ident) {
return true;
}
}
// function reconstructor & post-JS optimizer
function functionReconstructor(func) {
// We have this function all reconstructed, go and finalize it's JS!
if (IGNORED_FUNCTIONS.indexOf(func.ident) >= 0) return null;
func.JS = '\n';
var paramIdents = func.params.map(function(param) {
return toNiceIdent(param.ident);
});
if (CLOSURE_ANNOTATIONS) {
func.JS += '/**\n';
paramIdents.forEach(function(param) {
func.JS += ' * @param {number} ' + param + '\n';
});
func.JS += ' * @return {number}\n'
func.JS += ' */\n';
}
if (PRINT_SPLIT_FILE_MARKER) {
func.JS += '\n//FUNCTION_BEGIN_MARKER\n'
var associatedSourceFile = "NO_SOURCE";
}
if (DLOPEN_SUPPORT) Functions.getIndex(func.ident);
func.JS += 'function ' + func.ident + '(' + paramIdents.join(',') + '){\n';
if (PGO) {
func.JS += INDENTATION + 'PGOMonitor.called["' + func.ident + '"] = 1;\n';
}
if (ASM_JS) {
// spell out argument types
func.params.forEach(function(param) {
func.JS += INDENTATION + param.ident + '=' + deParen(asmCoercion(param.ident, param.type)) + ';\n';
});
addVariable('label', 'i32', func);
if (func.setjmpTable) {
addVariable('setjmpLabel', 'i32', func);
addVariable('setjmpTable', 'i32', func);
}
// spell out local variables
var vars = values(func.variables).filter(function(v) {
return v.origin !== 'funcparam' &&
(!isIllegalType(getImplementationType(v)) || v.ident.indexOf('$', 1) > 0); // not illegal, or a broken up illegal (we have illegal chunks explicitly anyhow)
});
if (vars.length > 0) {
var chunkSize = 20;
var chunks = [];
var i = 0;
while (i < vars.length) {
chunks.push(vars.slice(i, i+chunkSize));
i += chunkSize;
}
for (i = 0; i < chunks.length; i++) {
func.JS += INDENTATION + 'var ' + chunks[i].map(function(v) {
return v.ident + '=' + asmInitializer(getImplementationType(v)); //, func.variables[v.ident].impl);
}).join(',') + ';\n';
}
}
}
if (!ASM_JS) {
if (CLOSURE_ANNOTATIONS) func.JS += '/** @type {number} */';
func.JS += INDENTATION + 'var label=0;\n';
}
if (ASM_JS) {
var hasByVal = false;
func.params.forEach(function(param) {
hasByVal = hasByVal || param.byVal;
});
if (hasByVal) {
func.JS += INDENTATION + 'var tempParam=0;\n';
}
}
if (func.hasVarArgsCall) {
func.JS += INDENTATION + 'var tempVarArgs=0;\n';
}
// Prepare the stack, if we need one. If we have other stack allocations, force the stack to be set up.
func.JS += INDENTATION + RuntimeGenerator.stackEnter(func.initialStack, func.otherStackAllocations) + ';\n';
// Make copies of by-value params
// XXX It is not clear we actually need this. While without this we fail, it does look like
// Clang normally does the copy itself, in the calling function. We only need this code
// when Clang optimizes the code and passes the original, not the copy, to the other
// function. But Clang still copies, the copy is just unused! Need to figure out if that
// is caused by our running just some optimizations (the safe ones), or if its a bug
// in Clang, or a bug in our understanding of the IR.
func.params.forEach(function(param) {
if (param.byVal) {
var type = removePointing(param.type);
var typeInfo = Types.types[type];
func.JS += INDENTATION + (ASM_JS ? '' : 'var ') + 'tempParam = ' + param.ident + '; ' + param.ident + '=' + RuntimeGenerator.stackAlloc(typeInfo.flatSize) + ';' +
makeCopyValues(param.ident, 'tempParam', typeInfo.flatSize, 'null', null, param.byVal) + ';\n';
}
});
if (LABEL_DEBUG && functionNameFilterTest(func.ident)) func.JS += " Module.print(INDENT + ' Entering: " + func.ident + ": ' + Array.prototype.slice.call(arguments)); INDENT += ' ';\n";
// Walk function blocks and generate JS
function walkBlock(block, indent) {
if (!block) return '';
dprint('relooping', 'walking block: ' + block.type + ',' + block.entries + ' : ' + block.labels.length);
function getLabelLines(label, relooping) {
if (!label) return '';
var ret = '';
if ((LABEL_DEBUG >= 2) && functionNameFilterTest(func.ident)) {
ret += INDENTATION + "Module.print(INDENT + '" + func.ident + ":" + label.ident + "');\n";
}
if (EXECUTION_TIMEOUT > 0) {
ret += INDENTATION + 'if (Date.now() - START_TIME >= ' + (EXECUTION_TIMEOUT*1000) + ') throw "Timed out!" + (new Error().stack);\n';
}
if (PRINT_SPLIT_FILE_MARKER && Debugging.on && Debugging.getAssociatedSourceFile(label.lines[label.lines.length-1].lineNum)) {
// Overwrite the associated source file for every line. The last line should contain the source file associated to
// the return value/address of outer most block (the marked function).
associatedSourceFile = Debugging.getAssociatedSourceFile(label.lines[label.lines.length-1].lineNum);
}
// for special labels we care about (for phi), mark that we visited them
var i = 0;
return ret + label.lines.map(function(line) {
var JS = line.JS;
if (!relooping) JS = INDENTATION + JS;
if (relooping && i == label.lines.length-1) {
if (line.intertype == 'branch' || line.intertype == 'switch') {
JS = ''; // just branching operations - done in the relooper, so nothing need be done here
} else if (line.intertype == 'invoke') {
JS = line.reloopingJS; // invokes have code that is not rendered in the relooper (the call inside a try-catch)
}
}
i++;
// invoke instructions span two lines, and the debug info is located
// on the second line, hence the +1
if (Debugging.on) JS += Debugging.getComment(line.lineNum + (line.intertype === 'invoke' ? 1 : 0));
//assert(JS.indexOf('\n') < 0, JS);
return JS;
}).join('\n');
}
var ret = '';
if (!RELOOP || func.forceEmulated) { // TODO: also if just 1 label?
if (block.labels.length > 1) {
if (block.entries.length == 1) {
ret += indent + 'label = ' + getLabelId(block.entries[0]) + '; ' + (SHOW_LABELS ? '/* ' + getOriginalLabelId(block.entries[0]) + ' */' : '') + '\n';
} // otherwise, should have been set before!
if (func.setjmpTable) {
if (!ASM_JS) {
var setjmpTable = {};
ret += indent + 'var mySetjmpIds = {};\n';
ret += indent + 'var setjmpTable = {';
func.setjmpTable.forEach(function(triple) { // original label, label we created for right after the setjmp, variable setjmp result goes into
ret += '"' + getLabelId(triple.oldLabel) + '": ' + 'function(value) { label = ' + getLabelId(triple.newLabel) + '; ' + triple.assignTo + ' = value },';
});
ret += 'dummy: 0';
ret += '};\n';
} else {
ret += makeVarDef('setjmpLabel') + '=0;\n';
ret += makeVarDef('setjmpTable') + '=' + RuntimeGenerator.stackAlloc(4 * (MAX_SETJMPS + 1) * 2) + ';\n';
ret += makeSetValue('setjmpTable', '0', '0', 'i32') + ';'; // initialize first entry to 0
}
}
ret += indent + 'while(1)';
if (func.setjmpTable && !ASM_JS) {
ret += 'try { ';
}
ret += 'switch(' + asmCoercion('label', 'i32') + '){\n';
ret += block.labels.map(function(label) {
return INDENTATION + 'case ' + getLabelId(label.ident) + ': ' + (SHOW_LABELS ? '// ' + getOriginalLabelId(label.ident) : '') + '\n'
+ getLabelLines(label);
}).join('\n') + '\n';
if (func.setjmpTable && ASM_JS) {
// emit a label in which we write to the proper local variable, before jumping to the actual label
ret += INDENTATION + 'case ' + SETJMP_LABEL + ': ';
ret += func.setjmpTable.map(function(triple) { // original label, label we created for right after the setjmp, variable setjmp result goes into
return 'if ((setjmpLabel|0) == ' + getLabelId(triple.oldLabel) + ') { ' + triple.assignTo + ' = threwValue; label = ' + triple.newLabel + ' }\n';
}).join(' else ');
if (ASSERTIONS) ret += 'else abort(-3);\n';
ret += '__THREW__ = threwValue = 0;\n';
ret += 'break;\n';
}
if (ASSERTIONS) ret += indent + INDENTATION + 'default: assert(0' + (ASM_JS ? '' : ', "bad label: " + label') + ');\n';
ret += indent + '}\n';
if (func.setjmpTable && !ASM_JS) {
ret += ' } catch(e) { if (!e.longjmp || !(e.id in mySetjmpIds)) throw(e); setjmpTable[setjmpLabels[e.id]](e.value) }';
}
if (ASM_JS && func.returnType !== 'void') ret += ' return ' + asmInitializer(func.returnType) + ';\n'; // Add a return
} else {
ret += (SHOW_LABELS ? indent + '/* ' + block.entries[0] + ' */' : '') + '\n' + getLabelLines(block.labels[0]);
}
ret += '\n';
} else {
// Reloop multiple blocks using the compiled relooper
//B.start('jsifier-reloop');
//Relooper.setDebug(1);
Relooper.init();
if (ASM_JS) Relooper.setAsmJSMode(1);
var blockMap = {};
// add blocks
for (var i = 0; i < block.labels.length; i++) {
var label = block.labels[i];
var content = getLabelLines(label, true);
//printErr(func.ident + ' : ' + label.ident + ' : ' + content + '\n');
var last = label.lines[label.lines.length-1];
if (!last.signedIdent) {
blockMap[label.ident] = Relooper.addBlock(content);
} else {
assert(last.intertype == 'switch');
blockMap[label.ident] = Relooper.addBlock(content, last.signedIdent);
}
}
// add branchings
function relevant(x) { return x && x.length > 2 ? x : 0 } // ignores ';' which valueJS and label*JS can be if empty
for (var i = 0; i < block.labels.length; i++) {
var label = block.labels[i];
var ident = label.ident;
var last = label.lines[label.lines.length-1];
//printErr('zz last ' + dump(last));
if (last.intertype == 'branch') {
if (last.label) { // 1 target
Relooper.addBranch(blockMap[ident], blockMap[last.label], 0, relevant(last.labelJS));
} else { // 2 targets
Relooper.addBranch(blockMap[ident], blockMap[last.labelTrue], last.valueJS, relevant(last.labelTrueJS));
Relooper.addBranch(blockMap[ident], blockMap[last.labelFalse], 0, relevant(last.labelFalseJS));
}
} else if (last.intertype == 'switch') {
last.groupedLabels.forEach(function(switchLabel) {
Relooper.addBranch(blockMap[ident], blockMap[switchLabel.label], switchLabel.value, relevant(switchLabel.labelJS));
});
Relooper.addBranch(blockMap[ident], blockMap[last.defaultLabel], 0, relevant(last.defaultLabelJS));
} else if (last.intertype == 'invoke') {
Relooper.addBranch(blockMap[ident], blockMap[last.toLabel], '!__THREW__', relevant(last.toLabelJS));
Relooper.addBranch(blockMap[ident], blockMap[last.unwindLabel], 0, relevant(last.unwindLabelJS));
} else if (last.intertype in RELOOP_IGNORED_LASTS) {
} else {
throw 'unknown reloop last line: ' + last.intertype;
}
}
ret += Relooper.render(blockMap[block.entries[0]]);
Relooper.cleanup();
//B.stop('jsifier-reloop');
}
return ret;
}
func.JS += walkBlock(func.block, INDENTATION);
// Finalize function
if (LABEL_DEBUG && functionNameFilterTest(func.ident)) func.JS += " INDENT = INDENT.substr(0, INDENT.length-2);\n";
// Ensure a return in a function with a type that returns, even if it lacks a return (e.g., if it aborts())
if (RELOOP && ASM_JS && func.lines.length > 0 && func.returnType != 'void') {
var lastCurly = func.JS.lastIndexOf('}');
var lastReturn = func.JS.lastIndexOf('return ');
if ((lastCurly < 0 && lastReturn < 0) || // no control flow, no return
(lastCurly >= 0 && lastReturn < lastCurly)) { // control flow, no return past last join
func.JS += ' return ' + asmInitializer(func.returnType) + ';\n';
}
}
func.JS += '}\n';
if (PRINT_SPLIT_FILE_MARKER) {
func.JS += '\n//FUNCTION_END_MARKER_OF_SOURCE_FILE_' + associatedSourceFile + '\n';
}
if (!ASM_JS && (EXPORT_ALL || (func.ident in EXPORTED_FUNCTIONS))) {
func.JS += 'Module["' + func.ident + '"] = ' + func.ident + ';';
}
if (!ASM_JS && INLINING_LIMIT && func.lines.length >= INLINING_LIMIT) {
func.JS += func.ident + '["X"]=1;';
}
if (BUILD_AS_SHARED_LIB == 2) {
// TODO: make the assert conditional on ASSERTIONS
func.JS += 'if (globalScope) { assert(!globalScope["' + func.ident + '"]); globalScope["' + func.ident + '"] = ' + func.ident + ' }';
}
func.JS = func.JS.replace(/\n *;/g, '\n'); // remove unneeded lines
if (MAIN_MODULE || SIDE_MODULE) {
// Clone the function for each of its aliases. We do not know which name it will be used by in another module,
// and we do not have a heavyweight metadata system to resolve aliases during linking
var aliases = Functions.aliases[func.ident];
if (aliases) {
var body = func.JS.substr(func.JS.indexOf('('));
aliases.forEach(function(alias) {
func.JS += '\n' + 'function ' + alias + body;
});
}
}
itemsDict.function.push(func);
}
function getVarData(funcData, ident) {
var local = funcData.variables[ident];
if (local) return local;
var global = Variables.globals[ident];
return global || null;
}
function getVarImpl(funcData, ident) {
if (ident === 'null' || isNumber(ident)) return VAR_NATIVIZED; // like nativized, in that we have the actual value right here
var data = getVarData(funcData, ident);
assert(data, 'What variable is this? |' + ident + '|');
return data.impl;
}
// An interitem that has |assignTo| is an assign to that item. They call this function which
// generates the actual assignment.
function makeAssign(item) {
var valueJS = item.JS;
item.JS = '';
if (!ASM_JS || item.intertype != 'alloca' || item.funcData.variables[item.assignTo].impl == VAR_EMULATED) { // asm only needs non-allocas
if (CLOSURE_ANNOTATIONS) item.JS += '/** @type {number} */ ';
item.JS += ((ASM_JS || item.overrideSSA) ? '' : 'var ') + toNiceIdent(item.assignTo);
}
var value = parseNumerical(valueJS);
var impl = getVarImpl(item.funcData, item.assignTo);
switch (impl) {
case VAR_NATIVE: {
break;
}
case VAR_NATIVIZED: {
// SSA, so this must be the alloca. No need for a value
if (!item.overrideSSA) value = '';
break;
}
case VAR_EMULATED: {
break;
}
default: throw 'zz unknown impl: ' + impl;
}
if (value && value != ';') {
item.JS += '=' + value;
}
if (item.JS[item.JS.length-1] != ';') {
item.JS += ';';
}
}
// Function lines
function valueHandler(item) {
if (item.vars) {
item.vars.forEach(function(v) {
addVariable(v[0], v[1]);
});
}
return item.ident;
}
function noopHandler(item) {
return ';';
}
function varHandler(item) { // assigns into phis become simple vars
return ASM_JS ? ';' : ('var ' + item.ident + ';');
}
function storeHandler(item) {
var value = finalizeLLVMParameter(item.value);
if (pointingLevels(item.pointerType) == 1) {
value = parseNumerical(value, item.valueType);
}
var impl = VAR_EMULATED;
if (item.pointer.intertype == 'value') {
impl = getVarImpl(item.funcData, item.ident);
}
if (item.valueType[item.valueType.length-1] === '>') {
// vector store TODO: move to makeSetValue?
var native = getVectorNativeType(item.valueType);
var base = getSIMDName(native);
return '(' + makeSetValue(item.ident, 0, value + '.x', native, 0, 0, item.align) + ',' +
makeSetValue(item.ident, 4, value + '.y', native, 0, 0, item.align) + ',' +
makeSetValue(item.ident, 8, value + '.z', native, 0, 0, item.align) + ',' +
makeSetValue(item.ident, 12, value + '.w', native, 0, 0, item.align) + ');';
}
switch (impl) {
case VAR_NATIVIZED:
if (isNumber(item.ident)) {
// Direct write to a memory address; this may be an intentional segfault, if not, it is a bug in the source
if (ASM_JS) {
return 'abort(' + item.ident + ')';
} else {
return 'throw "fault on write to ' + item.ident + '";';
}
}
return item.ident + '=' + value + ';'; // We have the actual value here
break;
case VAR_EMULATED:
if (item.pointer.intertype == 'value') {
return makeSetValue(makeGlobalUse(item.ident), 0, value, item.valueType, 0, 0, item.align) + ';';
} else {
return makeSetValue(0, finalizeLLVMParameter(item.pointer), value, item.valueType, 0, 0, item.align) + ';';
}
break;
default:
throw 'unknown [store] impl: ' + impl;
}
return null;
}
function deletedHandler(item) { return ';' }
function getOriginalLabelId(label) {
var funcData = Framework.currItem.funcData;
var labelIdsInverse = funcData.labelIdsInverse;
return labelIdsInverse[label];
}
function getLabelId(label) {
return label;
}
function makeBranch(label, lastLabel, labelIsVariable) { // lastLabel is deprecated
var pre = '';
if (label[0] == 'B') {
assert(!labelIsVariable, 'Cannot handle branches to variables with special branching options');
var parts = label.split('|');
var trueLabel = parts[1] || '';
var oldLabel = parts[2] || '';
var labelSetting = oldLabel ? 'label=' + getLabelId(oldLabel) + ';' +
(SHOW_LABELS ? ' /* to: ' + getOriginalLabelId(cleanLabel(oldLabel)) + ' */' : '') : ''; // TODO: optimize away the setting
if (label[1] == 'R') {
if (label[2] == 'N') { // BRNOL: break, no label setting